android - 使用 RecyclerView 时应用崩溃

Question

此应用程序用于在屏幕上显示回收站 View ，但它在启动时立即崩溃。日志猫:

:16.836 8259-8259/com.robyn.frog E/AndroidRuntime: FATAL EXCEPTION: main
                                                          Process: com.robyn.frog, PID: 8259
                                                          java.lang.OutOfMemoryError: Failed to allocate a 512174316 byte allocation with 16777120 free bytes and 227MB until OOM
                                                              at dalvik.system.VMRuntime.newNonMovableArray(Native Method)
                                                              at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method)
                                                              at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:609)
                                                              at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:444)
                                                              at android.graphics.drawable.Drawable.createFromResourceStream(Drawable.java:988)
                                                              at android.content.res.Resources.loadDrawableForCookie(Resources.java:2596)
                                                              at android.content.res.Resources.loadDrawable(Resources.java:2503)
                                                              at android.content.res.Resources.getDrawable(Resources.java:864)
                                                              at android.content.Context.getDrawable(Context.java:403)
                                                              at android.support.v4.content.ContextCompat.getDrawable(ContextCompat.java:353)
                                                              at android.support.v7.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:201)
                                                              at android.support.v7.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:189)
                                                              at android.support.v7.content.res.AppCompatResources.getDrawable(AppCompatResources.java:100)
                                                              at android.support.v7.widget.AppCompatImageHelper.loadFromAttributes(AppCompatImageHelper.java:54)
                                                              at android.support.v7.widget.AppCompatImageView.<init>(AppCompatImageView.java:66)
                                                              at android.support.v7.widget.AppCompatImageView.<init>(AppCompatImageView.java:56)
                                                              at android.support.v7.app.AppCompatViewInflater.createView(AppCompatViewInflater.java:106)
                                                              at android.support.v7.app.AppCompatDelegateImplV9.createView(AppCompatDelegateImplV9.java:1026)
                                                              at android.support.v7.app.AppCompatDelegateImplV9.onCreateView(AppCompatDelegateImplV9.java:1083)
                                                              at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:725)
                                                              at android.view.LayoutInflater.rInflate(LayoutInflater.java:806)
                                                              at android.view.LayoutInflater.inflate(LayoutInflater.java:504)
                                                              at android.view.LayoutInflater.inflate(LayoutInflater.java:414)
                                                              at com.robyn.frog.RecyclerFragment$FrogHolder.<init>(RecyclerFragment.java:0)
                                                              at com.robyn.frog.RecyclerFragment$FrogAdapter.onCreateViewHolder(RecyclerFragment.java:72)
                                                              at com.robyn.frog.RecyclerFragment$FrogAdapter.onCreateViewHolder(RecyclerFragment.java:63)
                                                              at android.support.v7.widget.RecyclerView$Adapter.createViewHolder(RecyclerView.java:6411)
                                                              at android.support.v7.widget.RecyclerView$Recycler.tryGetViewHolderForPositionByDeadline(RecyclerView.java:5597)
                                                              at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5482)
                                                              at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5478)
                                                              at android.support.v7.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:2215)
                                                              at android.support.v7.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1542)
                                                              at android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1502)
                                                              at android.support.v7.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:595)
                                                              at android.support.v7.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java:3625)
                                                              at android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:3354)
                                                              at android.support.v7.widget.RecyclerView.onLayout(RecyclerView.java:3886)
                                                              at android.view.View.layout(View.java:15737)
                                                              at android.view.ViewGroup.layout(ViewGroup.java:5041)
                                                              at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1703)
                                                              at android.widget.LinearLayout.layoutHorizontal(LinearLayout.java:1692)
                                                              at android.widget.LinearLayout.onLayout(LinearLayout.java:1468)
                                                              at android.view.View.layout(View.java:15737)
                                                              at android.view.ViewGroup.layout(ViewGroup.java:5041)
                                                              at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579)
                                                              at android.widget.FrameLayout.onLayout(FrameLayout.java:514)
                                                              at android.view.View.layout(View.java:15737)
                                                              at android.view.ViewGroup.layout(ViewGroup.java:5041)
                                                              at android.support.v7.widget.ActionBarOverlayLayout.onLayout(ActionBarOverlayLayout.java:434)
                                                            at android.view.View.lay

主要 Activity :

public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    FragmentManager fm = getSupportFragmentManager();
    Fragment fragment = fm.findFragmentById(R.id.fragment_container);

    if (fragment == null) {
        fragment = new RecyclerFragment();
        fm.beginTransaction().add(R.id.fragment_container, fragment).commit();
    }
}

回收器 fragment ，容器适配器和查看器。添加使用适配器的 updateUI 方法后，应用程序崩溃。

public class RecyclerFragment extends Fragment {
private RecyclerView mRecyclerView;
private FrogAdapter mAdapter;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.recycler, container, false);
    mRecyclerView = (RecyclerView) view.findViewById(R.id.recycler_view);
    mRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));

    updateUI();
    return view;
}

private void updateUI() {
    Pond pond = Pond.get(getActivity());
    List<Frog> frogs = pond.getFrogs();
    if (mAdapter == null) {
        mAdapter = new FrogAdapter(frogs);
        mRecyclerView.setAdapter(mAdapter);
    } else {
        mAdapter.notifyDataSetChanged();
    }
}

private class FrogHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
    private TextView mName;
    private TextView mWord;

    public FrogHolder(LayoutInflater inflater, ViewGroup parent) {
        super(inflater.inflate(R.layout.item, parent, false));
        itemView.setOnClickListener(this);

        mName = (TextView) itemView.findViewById(R.id.name);
        mWord = (TextView) itemView.findViewById(R.id.word);
    }

    @Override
    public void onClick(View v) {

    }
}


private class FrogAdapter extends RecyclerView.Adapter<FrogHolder>{
    private List<Frog> mFrogs;

    public FrogAdapter(List<Frog> frogs) {
        mFrogs = frogs;
    }
    @Override
    public FrogHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        LayoutInflater layoutInflater = LayoutInflater.from(getActivity());
        return new FrogHolder(layoutInflater, parent);
    }

    @Override
    public void onBindViewHolder(FrogHolder holder, int position) {
        Frog frog = mFrogs.get(position);
        holder.mName.setText(frog.getName());
        holder.mWord.setText(frog.getWord());
    }

    @Override
    public int getItemCount() {
        return mFrogs.size();
    }
}
}

这个类构成了一个列表，供回收站 View 显示:

public class Pond {

public class Frog {
    private String mName;
    private String mWord;

    public String getName() {
        return mName;
    }

    public void setName(String name) {
        mName = name;
    }

    public String getWord() {
        return mWord;
    }

    public void setWord(String word) {
        mWord = word;
    }
}

private static Pond sPond;

private List<Frog> mFrogs;

public static Pond get(Context context) {
    if (sPond == null) {
        sPond = new Pond(context);
    }
    return sPond;
}

private Pond(Context context) {
    mFrogs = new ArrayList<>();
    for (int i = 0; i < 100; i++) {
        Frog frog = new Frog();
        frog.setName("Frog #" + i);
        frog.setWord("qqq");
        mFrogs.add(frog);
    }
}

public List<Frog> getFrogs() {
    return mFrogs;
}

布局文件:activity_main.xml

    <?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:orientation="horizontal"
    android:id="@+id/fragment_container"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.robyn.frog.MainActivity">

</LinearLayout>

回收器.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.RecyclerView xmlns:android="http://schemas.android.com/apk/res/android"
              android:id="@+id/recycler_view"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
              android:orientation="vertical">
</android.support.v7.widget.RecyclerView>

项目.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              xmlns:app="http://schemas.android.com/apk/res-auto"
              android:layout_width="match_parent"
              android:layout_height="wrap_content"
              android:orientation="horizontal">
    <ImageView
        android:id="@+id/imageView"
        android:layout_width="50dp"
        android:layout_height="50dp"
        android:layout_margin="10dp"
        app:srcCompat="@drawable/frog"/>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="10dp"
        android:orientation="vertical">
        <TextView
            android:id="@+id/name"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="TextView"/>
        <TextView
            android:id="@+id/word"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="TextView"/>
    </LinearLayout>
</LinearLayout>

Answer 1

这个问题是在 android 开始处理位图时引起的。主要原因是内存空间不足，而且垃圾收集器无法释放一些空间。

对于这种情况，你有两种解决方案:

1. 大堆

转到您的 list 文件并添加

android:largeHeap="true"

android:hardwareAccelerated="false"

例如内部应用标签

   <application
     android:allowBackup="true"
     android:hardwareAccelerated="false"
     android:largeHeap="true"
     android:icon="@mipmap/ic_launcher"
     android:label="@string/app_name"
     android:supportsRtl="true"
     android:theme="@style/AppTheme">

1. 使用像Universal Image Loader这样的库

https://github.com/nostra13/Android-Universal-Image-Loader