Attempt to invoke virtual method 'int android.view.View.getVisibility()' on a null object reference











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lang.NullPointerException: Attempt to invoke virtual method 'int android.view.View.getVisibility()' on a null object reference



and I don't know how to solve it



my class :



public class SimpleCommodityActivity extends BaseActivity {



    @BindView(R.id.view_pager_tab)

    SmartTabLayout view_pager_tab;

    @BindView(R.id.viewpager)

    ViewPager viewpager;

    @BindView(R.id.img_back)

    ImageView img_back;

    @BindView(R.id.img_cart)

    ImageView img_cart;

    @BindView(R.id.txt_badge_shopping_cart)

    TextView txt_badge_shopping_cart;

    @BindView(R.id.txt_title_commodity)

    TextView txt_title_commodity;

    @BindView(R.id.layout_loading)

    LinearLayout layout_loading;

    @BindView(R.id.layout_error)

    LinearLayout layout_error;

    private String commodityId;

    private boolean shouldExecuteOnResume;



    @Override

    protected int getViewId() {

        return R.layout.activity_simple_commodity;

    }



    @Override

    protected void initializeActivity() {

        Intent intent = getIntent();

        commodityId = intent.getStringExtra("id");

        Log.e("id", commodityId);

        getData();

        getBadge();

        shouldExecuteOnResume = false;

        txt_title_commodity.setSelected(true);

    }



    @Override

    protected void setupListeners() {



    }



    @Override

    protected void isNetwork(boolean isNetwork) {



    }



    @Override

    protected void onResume() {

        super.onResume();

        if (shouldExecuteOnResume) {

            getData();

            getBadge();

        } else {

            shouldExecuteOnResume = true;

        }

    }



    private void getData() {

        layout_loading.setVisibility(View.VISIBLE);

        new PakhshiStore().getCommodity(commodityId).subscribe(new DisposableObserver<MainRes<CommodityRes>>() {

            @Override

            public void onNext(MainRes<CommodityRes> value) {

                if (value.getResponseType() != 1) {

                    showMessage(value.getError());

                } else {

                    CommodityRes commodityRes = value.getData();

                    if (commodityRes != null) {

                        //datas = commodityRes;

                        AppStore.setCommodityData(commodityRes);

                        setData(commodityRes);

                        //scrollview.setVisibility(View.VISIBLE);

                    } else {

                        layout_loading.setVisibility(View.GONE);

                        //scrollview.setVisibility(View.GONE);

                        layout_error.setVisibility(View.VISIBLE);

                    }

                }

            }



            @Override

            public void onError(Throwable e) {

                layout_loading.setVisibility(View.GONE);

                //scrollview.setVisibility(View.GONE);

                layout_error.setVisibility(View.VISIBLE);

            }



            @Override

            public void onComplete() {

                layout_loading.setVisibility(View.GONE);

            }

        });

    }



    private void setData(CommodityRes commodityRes) {

        txt_title_commodity.setText(commodityRes.getTitle());

        FragmentPagerItemAdapter adapter = new FragmentPagerItemAdapter(

                getSupportFragmentManager(), FragmentPagerItems.with(this)

                .add(R.string.buy_commodity, SimpleCommodityFrag.class)

                .add(R.string.ommoditi_info, SimpleCommodityFrag.class)

                .create());

        viewpager.setAdapter(adapter);

        view_pager_tab.setViewPager(viewpager);

    }



    public void getBadge() {

        if (AppStore.getToken() != null) {

            new PakhshiStore().getCartCount().subscribe(new DisposableObserver<MainRes<Integer>>() {

                @Override

                public void onNext(MainRes<Integer> value) {

                    if (value.getResponseType() != 1) {

                        showMessage(value.getError());

                    } else {

                        if (value.getData() != 0) {

                            txt_badge_shopping_cart.setVisibility(View.VISIBLE);

                            txt_badge_shopping_cart.setText(String.valueOf(value.getData()));

                        } else {

                            txt_badge_shopping_cart.setVisibility(View.GONE);

                        }

                    }

                }



                @Override

                public void onError(Throwable e) {



                }



                @Override

                public void onComplete() {



                }

            });

        } else {

            txt_badge_shopping_cart.setVisibility(View.GONE);

        }

    }



    public void initSpinnerSize(final int position) {

        if (AppStore.getCommodityData().getPackageTiers().size() != 0) {

            Bundle bundle = new Bundle();

            bundle.putInt("position",position);

            FragmentPagerItemAdapter adapter = new FragmentPagerItemAdapter(

                    getSupportFragmentManager(), FragmentPagerItems.with(this)

                    .add(R.string.buy_commodity, SimpleCommodityFrag.class,bundle)

                    .add(R.string.ommoditi_info, SimpleCommodityFrag.class,bundle)

                    .create());

            viewpager.setAdapter(adapter);

            view_pager_tab.setViewPager(viewpager);

        }

    }

}


my ui:



<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:app="http://schemas.android.com/apk/res-auto"

    android:id="@+id/layout_container"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:background="@color/white"

    android:layoutDirection="rtl"

    android:orientation="vertical">



    <RelativeLayout

        android:id="@+id/layout_title"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_alignParentStart="true"

        android:layout_alignParentTop="true"

        android:background="@color/colorPrimary">



        <ImageView

            android:id="@+id/img_back"

            android:layout_width="@dimen/_40sdp"

            android:layout_height="@dimen/_40sdp"

            android:layout_alignParentRight="true"

            android:padding="@dimen/_15sdp"

            android:rotation="180"

            android:src="@drawable/ic_back"

            android:tint="@color/white" />





        <ImageView

            android:id="@+id/img_cart"

            android:layout_width="@dimen/_40sdp"

            android:layout_height="@dimen/_40sdp"

            android:layout_alignParentLeft="true"

            android:padding="@dimen/_10sdp"

            android:src="@drawable/ic_buy"

            android:tint="@color/white" />



        <TextView

            android:id="@+id/txt_badge_shopping_cart"

            android:layout_width="@dimen/_15sdp"

            android:layout_height="@dimen/_15sdp"

            android:layout_alignRight="@id/img_cart"

            android:layout_marginTop="@dimen/_5sdp"

            android:background="@drawable/red_circle"

            android:gravity="center"

            android:text="1"

            android:textColor="@color/white"

            android:textSize="@dimen/font_size_xxsmall" />



        <ImageView

            android:id="@+id/img_share"

            android:layout_width="@dimen/_40sdp"

            android:layout_height="@dimen/_40sdp"

            android:layout_toRightOf="@id/img_cart"

            android:padding="@dimen/_10sdp"

            android:src="@drawable/ic_share"

            android:tint="@color/white"

            android:visibility="gone" />



        <TextView

            android:id="@+id/txt_title_commodity"

            android:layout_width="wrap_content"

            android:layout_height="@dimen/_40sdp"

            android:layout_marginLeft="@dimen/_3sdp"

            android:layout_marginRight="@dimen/_3sdp"

            android:layout_toLeftOf="@id/img_back"

            android:layout_toRightOf="@id/img_cart"

            android:ellipsize="marquee"

            android:fadingEdge="horizontal"

            android:gravity="center"

            android:marqueeRepeatLimit="marquee_forever"

            android:scrollHorizontally="true"

            android:singleLine="true"

            android:textColor="@color/white"

            android:textSize="@dimen/font_size_small" />

    </RelativeLayout>



    <com.ogaclejapan.smarttablayout.SmartTabLayout

        android:id="@+id/view_pager_tab"

        android:layout_alignParentBottom="true"

        android:layout_width="match_parent"

        android:layout_height="@dimen/_40sdp"

        android:background="@color/colorAccent"

        app:stl_clickable="true"

        app:stl_customTabTextLayoutId="@layout/custom_tab"

        app:stl_customTabTextViewId="@id/txt"

        app:stl_defaultTabBackground="?attr/selectableItemBackground"

        app:stl_defaultTabTextAllCaps="true"

        app:stl_defaultTabTextColor="@color/colorAccent"

        app:stl_defaultTabTextHorizontalPadding="16dp"

        app:stl_defaultTabTextMinWidth="0dp"

        app:stl_defaultTabTextSize="@dimen/font_size_xlarge"

        app:stl_distributeEvenly="false"

        app:stl_dividerColor="@color/transparent"

        app:stl_dividerThickness="@dimen/_1sdp"

        app:stl_drawDecorationAfterTab="false"

        app:stl_indicatorColor="@color/black_30"

        app:stl_indicatorCornerRadius="@dimen/_18sdp"

        app:stl_indicatorGravity="center"

        app:stl_indicatorInterpolation="smart"

        app:stl_indicatorThickness="@dimen/_30sdp"

        app:stl_titleOffset="24dp"

        app:stl_underlineThickness="1dp"  />



    <android.support.v4.view.ViewPager

        android:id="@+id/viewpager"

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        android:layout_below="@id/layout_title" />



    <LinearLayout

        android:id="@+id/layout_loading"

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        android:background="@color/background_color"

        android:gravity="center"

        android:orientation="vertical"

        android:visibility="gone">



        <ImageView

            android:layout_width="@dimen/_100sdp"

            android:layout_height="@dimen/_100sdp"

            android:alpha="0.3"

            android:src="@drawable/logo" />



        <com.github.ybq.android.spinkit.SpinKitView

            style="@style/SpinKitView.Large.ThreeBounce"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:layout_gravity="center"

            app:SpinKit_Color="@color/gray_hint" />



    </LinearLayout>



    <LinearLayout

        android:id="@+id/layout_error"

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        android:background="@color/background_color"

        android:gravity="center"

        android:orientation="vertical"

        android:visibility="gone">



        <ImageView

            android:layout_width="@dimen/_80sdp"

            android:layout_height="@dimen/_80sdp"

            android:alpha="0.5"

            android:src="@drawable/ic_warning" />



        <TextView

            android:layout_width="match_parent"

            android:layout_height="wrap_content"

            android:layout_marginTop="@dimen/_10sdp"

            android:gravity="center"

            android:text="@string/error_commodity_not_found"

            android:textColor="@color/colorPrimaryDark"

            android:textSize="@dimen/font_size_normal" />



    </LinearLayout>

</RelativeLayout>


error:



java.lang.NullPointerException: Attempt to invoke virtual method 'int android.view.View.getVisibility()' on a null object reference



i really dont know what is the error
i remove fragment adapter, again this error show



log:



E/AndroidRuntime: FATAL EXCEPTION: main

    Process: com.pakhshi.app.pakhshi, PID: 28599

    java.lang.NullPointerException: Attempt to invoke virtual method 'int android.view.View.getVisibility()' on a null object reference

        at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1623)

        at android.view.View.measure(View.java:23297)

        at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:715)

        at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:461)

        at android.view.View.measure(View.java:23297)

        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6928)

        at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)

        at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:141)

        at android.view.View.measure(View.java:23297)

        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6928)

        at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1514)

        at android.widget.LinearLayout.measureVertical(LinearLayout.java:806)

        at android.widget.LinearLayout.onMeasure(LinearLayout.java:685)

        at android.view.View.measure(View.java:23297)

        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6928)

        at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)

        at android.view.View.measure(View.java:23297)

        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6928)

        at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1514)

        at android.widget.LinearLayout.measureVertical(LinearLayout.java:806)

        at android.widget.LinearLayout.onMeasure(LinearLayout.java:685)

        at android.view.View.measure(View.java:23297)

        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6928)

        at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)

        at com.android.internal.policy.DecorView.onMeasure(DecorView.java:899)

        at android.view.View.measure(View.java:23297)

        at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2837)

        at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1874)

        at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2129)

        at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1743)

        at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:7773)

        at android.view.Choreographer$CallbackRecord.run(Choreographer.java:911)

        at android.view.Choreographer.doCallbacks(Choreographer.java:723)

        at android.view.Choreographer.doFrame(Choreographer.java:658)

        at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:897)

        at android.os.Handler.handleCallback(Handler.java:789)

        at android.os.Handler.dispatchMessage(Handler.java:98)

        at android.os.Looper.loop(Looper.java:164)

        at android.app.ActivityThread.main(ActivityThread.java:6949)

        at java.lang.reflect.Method.invoke(Native Method)

        at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)

        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)





java android







share|improve this question
























  • Please post logs
    – Jay
    Nov 22 at 7:46






  • 1




    i really dont know what is the error i remove fragment adapter. Where is the adapter class?
    – Piyush
    Nov 22 at 7:48






  • 1




    The ViewPager thinks it has a child View, but it's null. It's not going to added that to itself, so it must be in your code somewhere. "remove adapter but this not work" – You're calling viewpager.setAdapter(adapter) in two places. Are you sure you removed them both?
    – Mike M.
    Nov 22 at 8:02








  • 1




    An adapter is returning bad data. What does your SimpleCommodityFrag look like?
    – laalto
    Nov 22 at 8:03






  • 1




    tnx @MikeM. , i change it and this will be ok
    – Ali Radman
    Nov 22 at 8:09















up vote
0
down vote

favorite












lang.NullPointerException: Attempt to invoke virtual method 'int android.view.View.getVisibility()' on a null object reference



and I don't know how to solve it



my class :



public class SimpleCommodityActivity extends BaseActivity {



    @BindView(R.id.view_pager_tab)

    SmartTabLayout view_pager_tab;

    @BindView(R.id.viewpager)

    ViewPager viewpager;

    @BindView(R.id.img_back)

    ImageView img_back;

    @BindView(R.id.img_cart)

    ImageView img_cart;

    @BindView(R.id.txt_badge_shopping_cart)

    TextView txt_badge_shopping_cart;

    @BindView(R.id.txt_title_commodity)

    TextView txt_title_commodity;

    @BindView(R.id.layout_loading)

    LinearLayout layout_loading;

    @BindView(R.id.layout_error)

    LinearLayout layout_error;

    private String commodityId;

    private boolean shouldExecuteOnResume;



    @Override

    protected int getViewId() {

        return R.layout.activity_simple_commodity;

    }



    @Override

    protected void initializeActivity() {

        Intent intent = getIntent();

        commodityId = intent.getStringExtra("id");

        Log.e("id", commodityId);

        getData();

        getBadge();

        shouldExecuteOnResume = false;

        txt_title_commodity.setSelected(true);

    }



    @Override

    protected void setupListeners() {



    }



    @Override

    protected void isNetwork(boolean isNetwork) {



    }



    @Override

    protected void onResume() {

        super.onResume();

        if (shouldExecuteOnResume) {

            getData();

            getBadge();

        } else {

            shouldExecuteOnResume = true;

        }

    }



    private void getData() {

        layout_loading.setVisibility(View.VISIBLE);

        new PakhshiStore().getCommodity(commodityId).subscribe(new DisposableObserver<MainRes<CommodityRes>>() {

            @Override

            public void onNext(MainRes<CommodityRes> value) {

                if (value.getResponseType() != 1) {

                    showMessage(value.getError());

                } else {

                    CommodityRes commodityRes = value.getData();

                    if (commodityRes != null) {

                        //datas = commodityRes;

                        AppStore.setCommodityData(commodityRes);

                        setData(commodityRes);

                        //scrollview.setVisibility(View.VISIBLE);

                    } else {

                        layout_loading.setVisibility(View.GONE);

                        //scrollview.setVisibility(View.GONE);

                        layout_error.setVisibility(View.VISIBLE);

                    }

                }

            }



            @Override

            public void onError(Throwable e) {

                layout_loading.setVisibility(View.GONE);

                //scrollview.setVisibility(View.GONE);

                layout_error.setVisibility(View.VISIBLE);

            }



            @Override

            public void onComplete() {

                layout_loading.setVisibility(View.GONE);

            }

        });

    }



    private void setData(CommodityRes commodityRes) {

        txt_title_commodity.setText(commodityRes.getTitle());

        FragmentPagerItemAdapter adapter = new FragmentPagerItemAdapter(

                getSupportFragmentManager(), FragmentPagerItems.with(this)

                .add(R.string.buy_commodity, SimpleCommodityFrag.class)

                .add(R.string.ommoditi_info, SimpleCommodityFrag.class)

                .create());

        viewpager.setAdapter(adapter);

        view_pager_tab.setViewPager(viewpager);

    }



    public void getBadge() {

        if (AppStore.getToken() != null) {

            new PakhshiStore().getCartCount().subscribe(new DisposableObserver<MainRes<Integer>>() {

                @Override

                public void onNext(MainRes<Integer> value) {

                    if (value.getResponseType() != 1) {

                        showMessage(value.getError());

                    } else {

                        if (value.getData() != 0) {

                            txt_badge_shopping_cart.setVisibility(View.VISIBLE);

                            txt_badge_shopping_cart.setText(String.valueOf(value.getData()));

                        } else {

                            txt_badge_shopping_cart.setVisibility(View.GONE);

                        }

                    }

                }



                @Override

                public void onError(Throwable e) {



                }



                @Override

                public void onComplete() {



                }

            });

        } else {

            txt_badge_shopping_cart.setVisibility(View.GONE);

        }

    }



    public void initSpinnerSize(final int position) {

        if (AppStore.getCommodityData().getPackageTiers().size() != 0) {

            Bundle bundle = new Bundle();

            bundle.putInt("position",position);

            FragmentPagerItemAdapter adapter = new FragmentPagerItemAdapter(

                    getSupportFragmentManager(), FragmentPagerItems.with(this)

                    .add(R.string.buy_commodity, SimpleCommodityFrag.class,bundle)

                    .add(R.string.ommoditi_info, SimpleCommodityFrag.class,bundle)

                    .create());

            viewpager.setAdapter(adapter);

            view_pager_tab.setViewPager(viewpager);

        }

    }

}


my ui:



<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:app="http://schemas.android.com/apk/res-auto"

    android:id="@+id/layout_container"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:background="@color/white"

    android:layoutDirection="rtl"

    android:orientation="vertical">



    <RelativeLayout

        android:id="@+id/layout_title"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_alignParentStart="true"

        android:layout_alignParentTop="true"

        android:background="@color/colorPrimary">



        <ImageView

            android:id="@+id/img_back"

            android:layout_width="@dimen/_40sdp"

            android:layout_height="@dimen/_40sdp"

            android:layout_alignParentRight="true"

            android:padding="@dimen/_15sdp"

            android:rotation="180"

            android:src="@drawable/ic_back"

            android:tint="@color/white" />





        <ImageView

            android:id="@+id/img_cart"

            android:layout_width="@dimen/_40sdp"

            android:layout_height="@dimen/_40sdp"

            android:layout_alignParentLeft="true"

            android:padding="@dimen/_10sdp"

            android:src="@drawable/ic_buy"

            android:tint="@color/white" />



        <TextView

            android:id="@+id/txt_badge_shopping_cart"

            android:layout_width="@dimen/_15sdp"

            android:layout_height="@dimen/_15sdp"

            android:layout_alignRight="@id/img_cart"

            android:layout_marginTop="@dimen/_5sdp"

            android:background="@drawable/red_circle"

            android:gravity="center"

            android:text="1"

            android:textColor="@color/white"

            android:textSize="@dimen/font_size_xxsmall" />



        <ImageView

            android:id="@+id/img_share"

            android:layout_width="@dimen/_40sdp"

            android:layout_height="@dimen/_40sdp"

            android:layout_toRightOf="@id/img_cart"

            android:padding="@dimen/_10sdp"

            android:src="@drawable/ic_share"

            android:tint="@color/white"

            android:visibility="gone" />



        <TextView

            android:id="@+id/txt_title_commodity"

            android:layout_width="wrap_content"

            android:layout_height="@dimen/_40sdp"

            android:layout_marginLeft="@dimen/_3sdp"

            android:layout_marginRight="@dimen/_3sdp"

            android:layout_toLeftOf="@id/img_back"

            android:layout_toRightOf="@id/img_cart"

            android:ellipsize="marquee"

            android:fadingEdge="horizontal"

            android:gravity="center"

            android:marqueeRepeatLimit="marquee_forever"

            android:scrollHorizontally="true"

            android:singleLine="true"

            android:textColor="@color/white"

            android:textSize="@dimen/font_size_small" />

    </RelativeLayout>



    <com.ogaclejapan.smarttablayout.SmartTabLayout

        android:id="@+id/view_pager_tab"

        android:layout_alignParentBottom="true"

        android:layout_width="match_parent"

        android:layout_height="@dimen/_40sdp"

        android:background="@color/colorAccent"

        app:stl_clickable="true"

        app:stl_customTabTextLayoutId="@layout/custom_tab"

        app:stl_customTabTextViewId="@id/txt"

        app:stl_defaultTabBackground="?attr/selectableItemBackground"

        app:stl_defaultTabTextAllCaps="true"

        app:stl_defaultTabTextColor="@color/colorAccent"

        app:stl_defaultTabTextHorizontalPadding="16dp"

        app:stl_defaultTabTextMinWidth="0dp"

        app:stl_defaultTabTextSize="@dimen/font_size_xlarge"

        app:stl_distributeEvenly="false"

        app:stl_dividerColor="@color/transparent"

        app:stl_dividerThickness="@dimen/_1sdp"

        app:stl_drawDecorationAfterTab="false"

        app:stl_indicatorColor="@color/black_30"

        app:stl_indicatorCornerRadius="@dimen/_18sdp"

        app:stl_indicatorGravity="center"

        app:stl_indicatorInterpolation="smart"

        app:stl_indicatorThickness="@dimen/_30sdp"

        app:stl_titleOffset="24dp"

        app:stl_underlineThickness="1dp"  />



    <android.support.v4.view.ViewPager

        android:id="@+id/viewpager"

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        android:layout_below="@id/layout_title" />



    <LinearLayout

        android:id="@+id/layout_loading"

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        android:background="@color/background_color"

        android:gravity="center"

        android:orientation="vertical"

        android:visibility="gone">



        <ImageView

            android:layout_width="@dimen/_100sdp"

            android:layout_height="@dimen/_100sdp"

            android:alpha="0.3"

            android:src="@drawable/logo" />



        <com.github.ybq.android.spinkit.SpinKitView

            style="@style/SpinKitView.Large.ThreeBounce"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:layout_gravity="center"

            app:SpinKit_Color="@color/gray_hint" />



    </LinearLayout>



    <LinearLayout

        android:id="@+id/layout_error"

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        android:background="@color/background_color"

        android:gravity="center"

        android:orientation="vertical"

        android:visibility="gone">



        <ImageView

            android:layout_width="@dimen/_80sdp"

            android:layout_height="@dimen/_80sdp"

            android:alpha="0.5"

            android:src="@drawable/ic_warning" />



        <TextView

            android:layout_width="match_parent"

            android:layout_height="wrap_content"

            android:layout_marginTop="@dimen/_10sdp"

            android:gravity="center"

            android:text="@string/error_commodity_not_found"

            android:textColor="@color/colorPrimaryDark"

            android:textSize="@dimen/font_size_normal" />



    </LinearLayout>

</RelativeLayout>


error:



java.lang.NullPointerException: Attempt to invoke virtual method 'int android.view.View.getVisibility()' on a null object reference



i really dont know what is the error
i remove fragment adapter, again this error show



log:



E/AndroidRuntime: FATAL EXCEPTION: main

    Process: com.pakhshi.app.pakhshi, PID: 28599

    java.lang.NullPointerException: Attempt to invoke virtual method 'int android.view.View.getVisibility()' on a null object reference

        at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1623)

        at android.view.View.measure(View.java:23297)

        at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:715)

        at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:461)

        at android.view.View.measure(View.java:23297)

        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6928)

        at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)

        at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:141)

        at android.view.View.measure(View.java:23297)

        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6928)

        at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1514)

        at android.widget.LinearLayout.measureVertical(LinearLayout.java:806)

        at android.widget.LinearLayout.onMeasure(LinearLayout.java:685)

        at android.view.View.measure(View.java:23297)

        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6928)

        at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)

        at android.view.View.measure(View.java:23297)

        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6928)

        at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1514)

        at android.widget.LinearLayout.measureVertical(LinearLayout.java:806)

        at android.widget.LinearLayout.onMeasure(LinearLayout.java:685)

        at android.view.View.measure(View.java:23297)

        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6928)

        at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)

        at com.android.internal.policy.DecorView.onMeasure(DecorView.java:899)

        at android.view.View.measure(View.java:23297)

        at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2837)

        at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1874)

        at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2129)

        at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1743)

        at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:7773)

        at android.view.Choreographer$CallbackRecord.run(Choreographer.java:911)

        at android.view.Choreographer.doCallbacks(Choreographer.java:723)

        at android.view.Choreographer.doFrame(Choreographer.java:658)

        at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:897)

        at android.os.Handler.handleCallback(Handler.java:789)

        at android.os.Handler.dispatchMessage(Handler.java:98)

        at android.os.Looper.loop(Looper.java:164)

        at android.app.ActivityThread.main(ActivityThread.java:6949)

        at java.lang.reflect.Method.invoke(Native Method)

        at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)

        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)





java android







share|improve this question
























  • Please post logs
    – Jay
    Nov 22 at 7:46






  • 1




    i really dont know what is the error i remove fragment adapter. Where is the adapter class?
    – Piyush
    Nov 22 at 7:48






  • 1




    The ViewPager thinks it has a child View, but it's null. It's not going to added that to itself, so it must be in your code somewhere. "remove adapter but this not work" – You're calling viewpager.setAdapter(adapter) in two places. Are you sure you removed them both?
    – Mike M.
    Nov 22 at 8:02








  • 1




    An adapter is returning bad data. What does your SimpleCommodityFrag look like?
    – laalto
    Nov 22 at 8:03






  • 1




    tnx @MikeM. , i change it and this will be ok
    – Ali Radman
    Nov 22 at 8:09













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up vote
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down vote

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lang.NullPointerException: Attempt to invoke virtual method 'int android.view.View.getVisibility()' on a null object reference



and I don't know how to solve it



my class :



public class SimpleCommodityActivity extends BaseActivity {



    @BindView(R.id.view_pager_tab)

    SmartTabLayout view_pager_tab;

    @BindView(R.id.viewpager)

    ViewPager viewpager;

    @BindView(R.id.img_back)

    ImageView img_back;

    @BindView(R.id.img_cart)

    ImageView img_cart;

    @BindView(R.id.txt_badge_shopping_cart)

    TextView txt_badge_shopping_cart;

    @BindView(R.id.txt_title_commodity)

    TextView txt_title_commodity;

    @BindView(R.id.layout_loading)

    LinearLayout layout_loading;

    @BindView(R.id.layout_error)

    LinearLayout layout_error;

    private String commodityId;

    private boolean shouldExecuteOnResume;



    @Override

    protected int getViewId() {

        return R.layout.activity_simple_commodity;

    }



    @Override

    protected void initializeActivity() {

        Intent intent = getIntent();

        commodityId = intent.getStringExtra("id");

        Log.e("id", commodityId);

        getData();

        getBadge();

        shouldExecuteOnResume = false;

        txt_title_commodity.setSelected(true);

    }



    @Override

    protected void setupListeners() {



    }



    @Override

    protected void isNetwork(boolean isNetwork) {



    }



    @Override

    protected void onResume() {

        super.onResume();

        if (shouldExecuteOnResume) {

            getData();

            getBadge();

        } else {

            shouldExecuteOnResume = true;

        }

    }



    private void getData() {

        layout_loading.setVisibility(View.VISIBLE);

        new PakhshiStore().getCommodity(commodityId).subscribe(new DisposableObserver<MainRes<CommodityRes>>() {

            @Override

            public void onNext(MainRes<CommodityRes> value) {

                if (value.getResponseType() != 1) {

                    showMessage(value.getError());

                } else {

                    CommodityRes commodityRes = value.getData();

                    if (commodityRes != null) {

                        //datas = commodityRes;

                        AppStore.setCommodityData(commodityRes);

                        setData(commodityRes);

                        //scrollview.setVisibility(View.VISIBLE);

                    } else {

                        layout_loading.setVisibility(View.GONE);

                        //scrollview.setVisibility(View.GONE);

                        layout_error.setVisibility(View.VISIBLE);

                    }

                }

            }



            @Override

            public void onError(Throwable e) {

                layout_loading.setVisibility(View.GONE);

                //scrollview.setVisibility(View.GONE);

                layout_error.setVisibility(View.VISIBLE);

            }



            @Override

            public void onComplete() {

                layout_loading.setVisibility(View.GONE);

            }

        });

    }



    private void setData(CommodityRes commodityRes) {

        txt_title_commodity.setText(commodityRes.getTitle());

        FragmentPagerItemAdapter adapter = new FragmentPagerItemAdapter(

                getSupportFragmentManager(), FragmentPagerItems.with(this)

                .add(R.string.buy_commodity, SimpleCommodityFrag.class)

                .add(R.string.ommoditi_info, SimpleCommodityFrag.class)

                .create());

        viewpager.setAdapter(adapter);

        view_pager_tab.setViewPager(viewpager);

    }



    public void getBadge() {

        if (AppStore.getToken() != null) {

            new PakhshiStore().getCartCount().subscribe(new DisposableObserver<MainRes<Integer>>() {

                @Override

                public void onNext(MainRes<Integer> value) {

                    if (value.getResponseType() != 1) {

                        showMessage(value.getError());

                    } else {

                        if (value.getData() != 0) {

                            txt_badge_shopping_cart.setVisibility(View.VISIBLE);

                            txt_badge_shopping_cart.setText(String.valueOf(value.getData()));

                        } else {

                            txt_badge_shopping_cart.setVisibility(View.GONE);

                        }

                    }

                }



                @Override

                public void onError(Throwable e) {



                }



                @Override

                public void onComplete() {



                }

            });

        } else {

            txt_badge_shopping_cart.setVisibility(View.GONE);

        }

    }



    public void initSpinnerSize(final int position) {

        if (AppStore.getCommodityData().getPackageTiers().size() != 0) {

            Bundle bundle = new Bundle();

            bundle.putInt("position",position);

            FragmentPagerItemAdapter adapter = new FragmentPagerItemAdapter(

                    getSupportFragmentManager(), FragmentPagerItems.with(this)

                    .add(R.string.buy_commodity, SimpleCommodityFrag.class,bundle)

                    .add(R.string.ommoditi_info, SimpleCommodityFrag.class,bundle)

                    .create());

            viewpager.setAdapter(adapter);

            view_pager_tab.setViewPager(viewpager);

        }

    }

}


my ui:



<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:app="http://schemas.android.com/apk/res-auto"

    android:id="@+id/layout_container"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:background="@color/white"

    android:layoutDirection="rtl"

    android:orientation="vertical">



    <RelativeLayout

        android:id="@+id/layout_title"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_alignParentStart="true"

        android:layout_alignParentTop="true"

        android:background="@color/colorPrimary">



        <ImageView

            android:id="@+id/img_back"

            android:layout_width="@dimen/_40sdp"

            android:layout_height="@dimen/_40sdp"

            android:layout_alignParentRight="true"

            android:padding="@dimen/_15sdp"

            android:rotation="180"

            android:src="@drawable/ic_back"

            android:tint="@color/white" />





        <ImageView

            android:id="@+id/img_cart"

            android:layout_width="@dimen/_40sdp"

            android:layout_height="@dimen/_40sdp"

            android:layout_alignParentLeft="true"

            android:padding="@dimen/_10sdp"

            android:src="@drawable/ic_buy"

            android:tint="@color/white" />



        <TextView

            android:id="@+id/txt_badge_shopping_cart"

            android:layout_width="@dimen/_15sdp"

            android:layout_height="@dimen/_15sdp"

            android:layout_alignRight="@id/img_cart"

            android:layout_marginTop="@dimen/_5sdp"

            android:background="@drawable/red_circle"

            android:gravity="center"

            android:text="1"

            android:textColor="@color/white"

            android:textSize="@dimen/font_size_xxsmall" />



        <ImageView

            android:id="@+id/img_share"

            android:layout_width="@dimen/_40sdp"

            android:layout_height="@dimen/_40sdp"

            android:layout_toRightOf="@id/img_cart"

            android:padding="@dimen/_10sdp"

            android:src="@drawable/ic_share"

            android:tint="@color/white"

            android:visibility="gone" />



        <TextView

            android:id="@+id/txt_title_commodity"

            android:layout_width="wrap_content"

            android:layout_height="@dimen/_40sdp"

            android:layout_marginLeft="@dimen/_3sdp"

            android:layout_marginRight="@dimen/_3sdp"

            android:layout_toLeftOf="@id/img_back"

            android:layout_toRightOf="@id/img_cart"

            android:ellipsize="marquee"

            android:fadingEdge="horizontal"

            android:gravity="center"

            android:marqueeRepeatLimit="marquee_forever"

            android:scrollHorizontally="true"

            android:singleLine="true"

            android:textColor="@color/white"

            android:textSize="@dimen/font_size_small" />

    </RelativeLayout>



    <com.ogaclejapan.smarttablayout.SmartTabLayout

        android:id="@+id/view_pager_tab"

        android:layout_alignParentBottom="true"

        android:layout_width="match_parent"

        android:layout_height="@dimen/_40sdp"

        android:background="@color/colorAccent"

        app:stl_clickable="true"

        app:stl_customTabTextLayoutId="@layout/custom_tab"

        app:stl_customTabTextViewId="@id/txt"

        app:stl_defaultTabBackground="?attr/selectableItemBackground"

        app:stl_defaultTabTextAllCaps="true"

        app:stl_defaultTabTextColor="@color/colorAccent"

        app:stl_defaultTabTextHorizontalPadding="16dp"

        app:stl_defaultTabTextMinWidth="0dp"

        app:stl_defaultTabTextSize="@dimen/font_size_xlarge"

        app:stl_distributeEvenly="false"

        app:stl_dividerColor="@color/transparent"

        app:stl_dividerThickness="@dimen/_1sdp"

        app:stl_drawDecorationAfterTab="false"

        app:stl_indicatorColor="@color/black_30"

        app:stl_indicatorCornerRadius="@dimen/_18sdp"

        app:stl_indicatorGravity="center"

        app:stl_indicatorInterpolation="smart"

        app:stl_indicatorThickness="@dimen/_30sdp"

        app:stl_titleOffset="24dp"

        app:stl_underlineThickness="1dp"  />



    <android.support.v4.view.ViewPager

        android:id="@+id/viewpager"

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        android:layout_below="@id/layout_title" />



    <LinearLayout

        android:id="@+id/layout_loading"

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        android:background="@color/background_color"

        android:gravity="center"

        android:orientation="vertical"

        android:visibility="gone">



        <ImageView

            android:layout_width="@dimen/_100sdp"

            android:layout_height="@dimen/_100sdp"

            android:alpha="0.3"

            android:src="@drawable/logo" />



        <com.github.ybq.android.spinkit.SpinKitView

            style="@style/SpinKitView.Large.ThreeBounce"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:layout_gravity="center"

            app:SpinKit_Color="@color/gray_hint" />



    </LinearLayout>



    <LinearLayout

        android:id="@+id/layout_error"

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        android:background="@color/background_color"

        android:gravity="center"

        android:orientation="vertical"

        android:visibility="gone">



        <ImageView

            android:layout_width="@dimen/_80sdp"

            android:layout_height="@dimen/_80sdp"

            android:alpha="0.5"

            android:src="@drawable/ic_warning" />



        <TextView

            android:layout_width="match_parent"

            android:layout_height="wrap_content"

            android:layout_marginTop="@dimen/_10sdp"

            android:gravity="center"

            android:text="@string/error_commodity_not_found"

            android:textColor="@color/colorPrimaryDark"

            android:textSize="@dimen/font_size_normal" />



    </LinearLayout>

</RelativeLayout>


error:



java.lang.NullPointerException: Attempt to invoke virtual method 'int android.view.View.getVisibility()' on a null object reference



i really dont know what is the error
i remove fragment adapter, again this error show



log:



E/AndroidRuntime: FATAL EXCEPTION: main

    Process: com.pakhshi.app.pakhshi, PID: 28599

    java.lang.NullPointerException: Attempt to invoke virtual method 'int android.view.View.getVisibility()' on a null object reference

        at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1623)

        at android.view.View.measure(View.java:23297)

        at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:715)

        at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:461)

        at android.view.View.measure(View.java:23297)

        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6928)

        at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)

        at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:141)

        at android.view.View.measure(View.java:23297)

        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6928)

        at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1514)

        at android.widget.LinearLayout.measureVertical(LinearLayout.java:806)

        at android.widget.LinearLayout.onMeasure(LinearLayout.java:685)

        at android.view.View.measure(View.java:23297)

        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6928)

        at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)

        at android.view.View.measure(View.java:23297)

        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6928)

        at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1514)

        at android.widget.LinearLayout.measureVertical(LinearLayout.java:806)

        at android.widget.LinearLayout.onMeasure(LinearLayout.java:685)

        at android.view.View.measure(View.java:23297)

        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6928)

        at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)

        at com.android.internal.policy.DecorView.onMeasure(DecorView.java:899)

        at android.view.View.measure(View.java:23297)

        at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2837)

        at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1874)

        at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2129)

        at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1743)

        at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:7773)

        at android.view.Choreographer$CallbackRecord.run(Choreographer.java:911)

        at android.view.Choreographer.doCallbacks(Choreographer.java:723)

        at android.view.Choreographer.doFrame(Choreographer.java:658)

        at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:897)

        at android.os.Handler.handleCallback(Handler.java:789)

        at android.os.Handler.dispatchMessage(Handler.java:98)

        at android.os.Looper.loop(Looper.java:164)

        at android.app.ActivityThread.main(ActivityThread.java:6949)

        at java.lang.reflect.Method.invoke(Native Method)

        at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)

        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)





java android







share|improve this question















lang.NullPointerException: Attempt to invoke virtual method 'int android.view.View.getVisibility()' on a null object reference



and I don't know how to solve it



my class :



public class SimpleCommodityActivity extends BaseActivity {



    @BindView(R.id.view_pager_tab)

    SmartTabLayout view_pager_tab;

    @BindView(R.id.viewpager)

    ViewPager viewpager;

    @BindView(R.id.img_back)

    ImageView img_back;

    @BindView(R.id.img_cart)

    ImageView img_cart;

    @BindView(R.id.txt_badge_shopping_cart)

    TextView txt_badge_shopping_cart;

    @BindView(R.id.txt_title_commodity)

    TextView txt_title_commodity;

    @BindView(R.id.layout_loading)

    LinearLayout layout_loading;

    @BindView(R.id.layout_error)

    LinearLayout layout_error;

    private String commodityId;

    private boolean shouldExecuteOnResume;



    @Override

    protected int getViewId() {

        return R.layout.activity_simple_commodity;

    }



    @Override

    protected void initializeActivity() {

        Intent intent = getIntent();

        commodityId = intent.getStringExtra("id");

        Log.e("id", commodityId);

        getData();

        getBadge();

        shouldExecuteOnResume = false;

        txt_title_commodity.setSelected(true);

    }



    @Override

    protected void setupListeners() {



    }



    @Override

    protected void isNetwork(boolean isNetwork) {



    }



    @Override

    protected void onResume() {

        super.onResume();

        if (shouldExecuteOnResume) {

            getData();

            getBadge();

        } else {

            shouldExecuteOnResume = true;

        }

    }



    private void getData() {

        layout_loading.setVisibility(View.VISIBLE);

        new PakhshiStore().getCommodity(commodityId).subscribe(new DisposableObserver<MainRes<CommodityRes>>() {

            @Override

            public void onNext(MainRes<CommodityRes> value) {

                if (value.getResponseType() != 1) {

                    showMessage(value.getError());

                } else {

                    CommodityRes commodityRes = value.getData();

                    if (commodityRes != null) {

                        //datas = commodityRes;

                        AppStore.setCommodityData(commodityRes);

                        setData(commodityRes);

                        //scrollview.setVisibility(View.VISIBLE);

                    } else {

                        layout_loading.setVisibility(View.GONE);

                        //scrollview.setVisibility(View.GONE);

                        layout_error.setVisibility(View.VISIBLE);

                    }

                }

            }



            @Override

            public void onError(Throwable e) {

                layout_loading.setVisibility(View.GONE);

                //scrollview.setVisibility(View.GONE);

                layout_error.setVisibility(View.VISIBLE);

            }



            @Override

            public void onComplete() {

                layout_loading.setVisibility(View.GONE);

            }

        });

    }



    private void setData(CommodityRes commodityRes) {

        txt_title_commodity.setText(commodityRes.getTitle());

        FragmentPagerItemAdapter adapter = new FragmentPagerItemAdapter(

                getSupportFragmentManager(), FragmentPagerItems.with(this)

                .add(R.string.buy_commodity, SimpleCommodityFrag.class)

                .add(R.string.ommoditi_info, SimpleCommodityFrag.class)

                .create());

        viewpager.setAdapter(adapter);

        view_pager_tab.setViewPager(viewpager);

    }



    public void getBadge() {

        if (AppStore.getToken() != null) {

            new PakhshiStore().getCartCount().subscribe(new DisposableObserver<MainRes<Integer>>() {

                @Override

                public void onNext(MainRes<Integer> value) {

                    if (value.getResponseType() != 1) {

                        showMessage(value.getError());

                    } else {

                        if (value.getData() != 0) {

                            txt_badge_shopping_cart.setVisibility(View.VISIBLE);

                            txt_badge_shopping_cart.setText(String.valueOf(value.getData()));

                        } else {

                            txt_badge_shopping_cart.setVisibility(View.GONE);

                        }

                    }

                }



                @Override

                public void onError(Throwable e) {



                }



                @Override

                public void onComplete() {



                }

            });

        } else {

            txt_badge_shopping_cart.setVisibility(View.GONE);

        }

    }



    public void initSpinnerSize(final int position) {

        if (AppStore.getCommodityData().getPackageTiers().size() != 0) {

            Bundle bundle = new Bundle();

            bundle.putInt("position",position);

            FragmentPagerItemAdapter adapter = new FragmentPagerItemAdapter(

                    getSupportFragmentManager(), FragmentPagerItems.with(this)

                    .add(R.string.buy_commodity, SimpleCommodityFrag.class,bundle)

                    .add(R.string.ommoditi_info, SimpleCommodityFrag.class,bundle)

                    .create());

            viewpager.setAdapter(adapter);

            view_pager_tab.setViewPager(viewpager);

        }

    }

}


my ui:



<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:app="http://schemas.android.com/apk/res-auto"

    android:id="@+id/layout_container"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:background="@color/white"

    android:layoutDirection="rtl"

    android:orientation="vertical">



    <RelativeLayout

        android:id="@+id/layout_title"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_alignParentStart="true"

        android:layout_alignParentTop="true"

        android:background="@color/colorPrimary">



        <ImageView

            android:id="@+id/img_back"

            android:layout_width="@dimen/_40sdp"

            android:layout_height="@dimen/_40sdp"

            android:layout_alignParentRight="true"

            android:padding="@dimen/_15sdp"

            android:rotation="180"

            android:src="@drawable/ic_back"

            android:tint="@color/white" />





        <ImageView

            android:id="@+id/img_cart"

            android:layout_width="@dimen/_40sdp"

            android:layout_height="@dimen/_40sdp"

            android:layout_alignParentLeft="true"

            android:padding="@dimen/_10sdp"

            android:src="@drawable/ic_buy"

            android:tint="@color/white" />



        <TextView

            android:id="@+id/txt_badge_shopping_cart"

            android:layout_width="@dimen/_15sdp"

            android:layout_height="@dimen/_15sdp"

            android:layout_alignRight="@id/img_cart"

            android:layout_marginTop="@dimen/_5sdp"

            android:background="@drawable/red_circle"

            android:gravity="center"

            android:text="1"

            android:textColor="@color/white"

            android:textSize="@dimen/font_size_xxsmall" />



        <ImageView

            android:id="@+id/img_share"

            android:layout_width="@dimen/_40sdp"

            android:layout_height="@dimen/_40sdp"

            android:layout_toRightOf="@id/img_cart"

            android:padding="@dimen/_10sdp"

            android:src="@drawable/ic_share"

            android:tint="@color/white"

            android:visibility="gone" />



        <TextView

            android:id="@+id/txt_title_commodity"

            android:layout_width="wrap_content"

            android:layout_height="@dimen/_40sdp"

            android:layout_marginLeft="@dimen/_3sdp"

            android:layout_marginRight="@dimen/_3sdp"

            android:layout_toLeftOf="@id/img_back"

            android:layout_toRightOf="@id/img_cart"

            android:ellipsize="marquee"

            android:fadingEdge="horizontal"

            android:gravity="center"

            android:marqueeRepeatLimit="marquee_forever"

            android:scrollHorizontally="true"

            android:singleLine="true"

            android:textColor="@color/white"

            android:textSize="@dimen/font_size_small" />

    </RelativeLayout>



    <com.ogaclejapan.smarttablayout.SmartTabLayout

        android:id="@+id/view_pager_tab"

        android:layout_alignParentBottom="true"

        android:layout_width="match_parent"

        android:layout_height="@dimen/_40sdp"

        android:background="@color/colorAccent"

        app:stl_clickable="true"

        app:stl_customTabTextLayoutId="@layout/custom_tab"

        app:stl_customTabTextViewId="@id/txt"

        app:stl_defaultTabBackground="?attr/selectableItemBackground"

        app:stl_defaultTabTextAllCaps="true"

        app:stl_defaultTabTextColor="@color/colorAccent"

        app:stl_defaultTabTextHorizontalPadding="16dp"

        app:stl_defaultTabTextMinWidth="0dp"

        app:stl_defaultTabTextSize="@dimen/font_size_xlarge"

        app:stl_distributeEvenly="false"

        app:stl_dividerColor="@color/transparent"

        app:stl_dividerThickness="@dimen/_1sdp"

        app:stl_drawDecorationAfterTab="false"

        app:stl_indicatorColor="@color/black_30"

        app:stl_indicatorCornerRadius="@dimen/_18sdp"

        app:stl_indicatorGravity="center"

        app:stl_indicatorInterpolation="smart"

        app:stl_indicatorThickness="@dimen/_30sdp"

        app:stl_titleOffset="24dp"

        app:stl_underlineThickness="1dp"  />



    <android.support.v4.view.ViewPager

        android:id="@+id/viewpager"

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        android:layout_below="@id/layout_title" />



    <LinearLayout

        android:id="@+id/layout_loading"

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        android:background="@color/background_color"

        android:gravity="center"

        android:orientation="vertical"

        android:visibility="gone">



        <ImageView

            android:layout_width="@dimen/_100sdp"

            android:layout_height="@dimen/_100sdp"

            android:alpha="0.3"

            android:src="@drawable/logo" />



        <com.github.ybq.android.spinkit.SpinKitView

            style="@style/SpinKitView.Large.ThreeBounce"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:layout_gravity="center"

            app:SpinKit_Color="@color/gray_hint" />



    </LinearLayout>



    <LinearLayout

        android:id="@+id/layout_error"

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        android:background="@color/background_color"

        android:gravity="center"

        android:orientation="vertical"

        android:visibility="gone">



        <ImageView

            android:layout_width="@dimen/_80sdp"

            android:layout_height="@dimen/_80sdp"

            android:alpha="0.5"

            android:src="@drawable/ic_warning" />



        <TextView

            android:layout_width="match_parent"

            android:layout_height="wrap_content"

            android:layout_marginTop="@dimen/_10sdp"

            android:gravity="center"

            android:text="@string/error_commodity_not_found"

            android:textColor="@color/colorPrimaryDark"

            android:textSize="@dimen/font_size_normal" />



    </LinearLayout>

</RelativeLayout>


error:



java.lang.NullPointerException: Attempt to invoke virtual method 'int android.view.View.getVisibility()' on a null object reference



i really dont know what is the error
i remove fragment adapter, again this error show



log:



E/AndroidRuntime: FATAL EXCEPTION: main

    Process: com.pakhshi.app.pakhshi, PID: 28599

    java.lang.NullPointerException: Attempt to invoke virtual method 'int android.view.View.getVisibility()' on a null object reference

        at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1623)

        at android.view.View.measure(View.java:23297)

        at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:715)

        at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:461)

        at android.view.View.measure(View.java:23297)

        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6928)

        at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)

        at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:141)

        at android.view.View.measure(View.java:23297)

        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6928)

        at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1514)

        at android.widget.LinearLayout.measureVertical(LinearLayout.java:806)

        at android.widget.LinearLayout.onMeasure(LinearLayout.java:685)

        at android.view.View.measure(View.java:23297)

        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6928)

        at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)

        at android.view.View.measure(View.java:23297)

        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6928)

        at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1514)

        at android.widget.LinearLayout.measureVertical(LinearLayout.java:806)

        at android.widget.LinearLayout.onMeasure(LinearLayout.java:685)

        at android.view.View.measure(View.java:23297)

        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6928)

        at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)

        at com.android.internal.policy.DecorView.onMeasure(DecorView.java:899)

        at android.view.View.measure(View.java:23297)

        at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2837)

        at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1874)

        at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2129)

        at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1743)

        at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:7773)

        at android.view.Choreographer$CallbackRecord.run(Choreographer.java:911)

        at android.view.Choreographer.doCallbacks(Choreographer.java:723)

        at android.view.Choreographer.doFrame(Choreographer.java:658)

        at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:897)

        at android.os.Handler.handleCallback(Handler.java:789)

        at android.os.Handler.dispatchMessage(Handler.java:98)

        at android.os.Looper.loop(Looper.java:164)

        at android.app.ActivityThread.main(ActivityThread.java:6949)

        at java.lang.reflect.Method.invoke(Native Method)

        at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)

        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)





java android




java android






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edited Nov 22 at 7:54









Ümañg ßürmån

2,9783930




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asked Nov 22 at 7:45









Ali Radman

808




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  • Please post logs
    – Jay
    Nov 22 at 7:46






  • 1




    i really dont know what is the error i remove fragment adapter. Where is the adapter class?
    – Piyush
    Nov 22 at 7:48






  • 1




    The ViewPager thinks it has a child View, but it's null. It's not going to added that to itself, so it must be in your code somewhere. "remove adapter but this not work" – You're calling viewpager.setAdapter(adapter) in two places. Are you sure you removed them both?
    – Mike M.
    Nov 22 at 8:02








  • 1




    An adapter is returning bad data. What does your SimpleCommodityFrag look like?
    – laalto
    Nov 22 at 8:03






  • 1




    tnx @MikeM. , i change it and this will be ok
    – Ali Radman
    Nov 22 at 8:09


















  • Please post logs
    – Jay
    Nov 22 at 7:46






  • 1




    i really dont know what is the error i remove fragment adapter. Where is the adapter class?
    – Piyush
    Nov 22 at 7:48






  • 1




    The ViewPager thinks it has a child View, but it's null. It's not going to added that to itself, so it must be in your code somewhere. "remove adapter but this not work" – You're calling viewpager.setAdapter(adapter) in two places. Are you sure you removed them both?
    – Mike M.
    Nov 22 at 8:02








  • 1




    An adapter is returning bad data. What does your SimpleCommodityFrag look like?
    – laalto
    Nov 22 at 8:03






  • 1




    tnx @MikeM. , i change it and this will be ok
    – Ali Radman
    Nov 22 at 8:09
















Please post logs
– Jay
Nov 22 at 7:46




Please post logs
– Jay
Nov 22 at 7:46




1




1




i really dont know what is the error i remove fragment adapter. Where is the adapter class?
– Piyush
Nov 22 at 7:48




i really dont know what is the error i remove fragment adapter. Where is the adapter class?
– Piyush
Nov 22 at 7:48




1




1




The ViewPager thinks it has a child View, but it's null. It's not going to added that to itself, so it must be in your code somewhere. "remove adapter but this not work" – You're calling viewpager.setAdapter(adapter) in two places. Are you sure you removed them both?
– Mike M.
Nov 22 at 8:02






The ViewPager thinks it has a child View, but it's null. It's not going to added that to itself, so it must be in your code somewhere. "remove adapter but this not work" – You're calling viewpager.setAdapter(adapter) in two places. Are you sure you removed them both?
– Mike M.
Nov 22 at 8:02






1




1




An adapter is returning bad data. What does your SimpleCommodityFrag look like?
– laalto
Nov 22 at 8:03




An adapter is returning bad data. What does your SimpleCommodityFrag look like?
– laalto
Nov 22 at 8:03




1




1




tnx @MikeM. , i change it and this will be ok
– Ali Radman
Nov 22 at 8:09




tnx @MikeM. , i change it and this will be ok
– Ali Radman
Nov 22 at 8:09

















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