Binary XML file line #20: Error inflating class fragment-CodePudding

I want to add an object to LinearLayout, but it throws an error Error line: at me.solo_team.futureleader.ui.news.NewsFragment.onCreateView(NewsFragment.java:62) ( addElement(uris.get(i),names.get(i));)

NewsFragment

    private LayoutInflater inflater;
    private ViewGroup container;
    private LinearLayout nw;
    public View onCreateView(@NonNull LayoutInflater inflater,
                             ViewGroup container, Bundle savedInstanceState) {

        View root = inflater.inflate(R.layout.fragment_news, container, false);
        nw = root.findViewById(R.id.news_list);
        this.inflater = inflater;
        this.container = container;
        List<String> uris = Arrays.asList(
           // links...
);
        List<String> names = Arrays.asList(
             // names                                 
);
        for(int i =0;i<9;i  ){
            addElement(uris.get(i),names.get(i));
        }
        return root;
    }

    private void addElement(String uri,String name){
        FrameLayout row = (FrameLayout) inflater.inflate(R.layout.news_news, container,false);
        ConstraintLayout cn = row.findViewById(R.id.news_obj);
        Picasso.get().load(uri).into((ImageView)cn.getChildAt(1));
        ((TextView)cn.getChildAt(2)).setText(name);
        nw.addView(row);
    }

fragment_news:

<?xml version="1.0" encoding="utf-8"?>
<androidx.core.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".ui.news.NewsFragment">

    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <LinearLayout
            android:id="@ id/news_list"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintTop_toTopOf="parent">

        </LinearLayout>
    </androidx.constraintlayout.widget.ConstraintLayout>
</androidx.core.widget.NestedScrollView>

mews_news.xml:

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@ id/news_obj"
    android:layout_width="match_parent"
    android:layout_height="180dp"
    android:layout_margin="15dp"
    android:orientation="vertical"
    app:contentPadding="10dp">


    <View
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@drawable/gray_gradient_with_corners"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"/>

    <ImageView
        android:id="@ id/news_obj_image"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_marginLeft="10dp"
        android:layout_marginTop="10dp"
        android:layout_marginRight="10dp"
        android:background="@drawable/gray_gradient_with_corners"
        android:src="@drawable/gray_gradient"
        app:layout_constraintBottom_toTopOf="@id/news_obj_name"
        app:layout_constraintTop_toTopOf="parent"
        tools:ignore="ContentDescription" />

    <TextView
        android:id="@ id/news_obj_name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="10dp"
        android:layout_marginBottom="10dp"
        android:autoSizeMaxTextSize="20sp"
        android:autoSizeMinTextSize="12sp"
        android:autoSizeStepGranularity="2sp"
        android:autoSizeTextType="uniform"
        android:text="news text"
        android:textColor="@color/text_color1"
        android:textStyle="bold"
        app:layout_constraintBottom_toBottomOf="@id/news_obj"
        app:layout_constraintLeft_toLeftOf="@id/news_obj" />
</androidx.constraintlayout.widget.ConstraintLayout>

ERROR:

E/AndroidRuntime: FATAL EXCEPTION: main Process: me.solo_team.futureleader, PID: 23516 java.lang.RuntimeException: Unable to start activity ComponentInfo{me.solo_team.futureleader/me.solo_team.futureleader.MainActivity}: android.view.InflateException: Binary XML file line #20: Binary XML file line #20: Error inflating class fragment at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2913) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3048) at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78) at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108) at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1808) at android.os.Handler.dispatchMessage(Handler.java:106) at android.os.Looper.loop(Looper.java:193) at android.app.ActivityThread.main(ActivityThread.java:6669) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858) Caused by: android.view.InflateException: Binary XML file line #20: Binary XML file line #20: Error inflating class fragment Caused by: android.view.InflateException: Binary XML file line #20: Error inflating class fragment Caused by: java.lang.ArrayIndexOutOfBoundsException: length=8; index=8 at java.util.Arrays$ArrayList.get(Arrays.java:3769) at me.solo_team.futureleader.ui.news.NewsFragment.onCreateView(NewsFragment.java:62) at androidx.fragment.app.Fragment.performCreateView(Fragment.java:2963) at androidx.fragment.app.FragmentStateManager.createView(FragmentStateManager.java:518) at androidx.fragment.app.FragmentStateManager.moveToExpectedState(FragmentStateManager.java:282) at androidx.fragment.app.FragmentStore.moveToExpectedState(FragmentStore.java:112) at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1647) at androidx.fragment.app.FragmentManager.dispatchStateChange(FragmentManager.java:3128) at androidx.fragment.app.FragmentManager.dispatchViewCreated(FragmentManager.java:3065) at androidx.fragment.app.Fragment.performViewCreated(Fragment.java:2988) at androidx.fragment.app.FragmentStateManager.ensureInflatedView(FragmentStateManager.java:392) at androidx.fragment.app.FragmentStateManager.moveToExpectedState(FragmentStateManager.java:281) at androidx.fragment.app.FragmentLayoutInflaterFactory.onCreateView(FragmentLayoutInflaterFactory.java:140) at androidx.fragment.app.FragmentController.onCreateView(FragmentController.java:135) at androidx.fragment.app.FragmentActivity.dispatchFragmentsOnCreateView(FragmentActivity.java:319) at androidx.fragment.app.FragmentActivity.onCreateView(FragmentActivity.java:298) at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:780) at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730) at android.view.LayoutInflater.rInflate(LayoutInflater.java:863) at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824) at android.view.LayoutInflater.inflate(LayoutInflater.java:515) at android.view.LayoutInflater.inflate(LayoutInflater.java:423) at android.view.LayoutInflater.inflate(LayoutInflater.java:374) at androidx.appcompat.app.AppCompatDelegateImpl.setContentView(AppCompatDelegateImpl.java:706) at androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:195) at me.solo_team.futureleader.MainActivity.onCreate(MainActivity.java:24) at android.app.Activity.performCreate(Activity.java:7136) at android.app.Activity.performCreate(Activity.java:7127) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1271) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2893) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3048) E/AndroidRuntime: at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78) at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108) at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1808) at android.os.Handler.dispatchMessage(Handler.java:106) at android.os.Looper.loop(Looper.java:193) at android.app.ActivityThread.main(ActivityThread.java:6669) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)

CodePudding user response：

Caused by: java.lang.ArrayIndexOutOfBoundsException: length=8; index=8 at java.util.Arrays$ArrayList.get(Arrays.java:3769) at me.solo_team.futureleader.ui.news.NewsFragment.onCreateView(NewsFragment.java:62) Here's the real reason for the crash ^

It seems to me that your

for(int i =0;i<9;i  ){
            addElement(uris.get(i),names.get(i));
        }

tries to get an item that is out of bounds. It should be i<8, because while your list seems to have 8 entries (length = 8 in the exception), they start at 0 (0,1,2...6,7 for a total of 8 entries), so i=8 and i=9 will be out of bounds.

You could also set i<uris.size(), that should also prevent crashing if the length of your uris and names lists are the same

CodePudding user response：

Crashes of this type are often misleading, as you're only seeing the most recent (or least recent) exception in LogCat.

Whenever I encounter a bug that causes an app crash, I INTENTIONALLY ignore the first crash and repeat the previous behavior to trigger a second crash. Then suddenly, LogCat reports the exception completely differently, typically pointed at the correct source of the error. Yes, it's the very definition of insanity, as you're repeating the same behavior, but getting different results. But this is Android. Insanity comes baked in.