回收站视图中的 OutOfMemory 错误

Question

我正在制作一个简单的应用程序，它具有交错布局的 recyclerview，在 PHP 脚本的帮助下使用 Volley 库从服务器加载数据当我单击 RecyclerView 中的项目时，我的应用程序出现以下错误日志。

此外，当我查看内存日志时，应用程序在将数据从服务器加载到 recyclerView 时使用了大量内存

日志 //App启动时

I/Choreographer: Skipped 189 frames!  The application may be doing too much work on its main thread.
I/art: Background partial concurrent mark sweep GC freed 3797(174KB) AllocSpace objects, 1(36KB) LOS objects, 6% free, 56MB/60MB, paused 19.976ms total 90.718ms

错误日志 //点击RecyclerView中的item后

I/art: Alloc sticky concurrent mark sweep GC freed 10628(425KB) AllocSpace objects, 5(562KB) LOS objects, 2% free, 59MB/60MB, paused 476us total 7.071ms
I/art: Alloc partial concurrent mark sweep GC freed 928(67KB) AllocSpace objects, 1(16KB) LOS objects, 6% free, 58MB/62MB, paused 647us total 37.510ms
I/art: Alloc concurrent mark sweep GC freed 241(23KB) AllocSpace objects, 0(0B) LOS objects, 6% free, 58MB/62MB, paused 574us total 49.041ms
I/art: Forcing collection of SoftReferences for 21MB allocation
I/art: Alloc concurrent mark sweep GC freed 13(472B) AllocSpace objects, 0(0B) LOS objects, 6% free, 58MB/62MB, paused 429us total 16.959ms
E/art: Throwing OutOfMemoryError "Failed to allocate a 22400012 byte allocation with 4194304 free bytes and 5MB until OOM"I/art: Alloc sticky concurrent mark sweep GC freed 5(608B) AllocSpace objects, 0(0B) LOS objects, 3% free, 58MB/60MB, paused 509us total 8.143ms
I/art: Alloc partial concurrent mark sweep GC freed 17(480B) AllocSpace objects, 0(0B) LOS objects, 6% free, 58MB/62MB, paused 5.517ms total 17.409ms
I/art: Alloc concurrent mark sweep GC freed 14(448B) AllocSpace objects, 0(0B) LOS objects, 6% free, 58MB/62MB, paused 1.077ms total 107.298ms
I/art: Forcing collection of SoftReferences for 21MB allocation
I/art: Alloc concurrent mark sweep GC freed 3(96B) AllocSpace objects, 0(0B) LOS objects, 6% free, 58MB/62MB, paused 620us total 36.488ms
E/art: Throwing OutOfMemoryError "Failed to allocate a 22400012 byte allocation with 4194304 free bytes and 5MB until OOM"
D/skia: --- allocation failed for scaled bitmap
D/AndroidRuntime: Shutting down VM
FATAL EXCEPTION: main
Process: com.trueblueoperator.swachhapp, PID: 25499
  java.lang.OutOfMemoryError: Failed to allocate a 22400012 byte allocation with 4194304 free bytes and 5MB 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:2474)
  at android.content.res.Resources.loadDrawable(Resources.java:2381)
  at android.content.res.TypedArray.getDrawable(TypedArray.java:749)
  at android.widget.ImageView.<init>(ImageView.java:146)
  at android.widget.ImageView.<init>(ImageView.java:135)
  at android.support.v7.widget.AppCompatImageView.<init>(AppCompatImageView.java:58)
  at android.support.v7.widget.AppCompatImageView.<init>(AppCompatImageView.java:54)
  at android.support.v7.app.AppCompatViewInflater.createView(AppCompatViewInflater.java:95)
  at android.support.v7.app.AppCompatDelegateImplV7.createView(AppCompatDelegateImplV7.java:938)
  at android.support.v7.app.AppCompatDelegateImplV7.onCreateView(AppCompatDelegateImplV7.java:992)
  at android.support.v4.view.LayoutInflaterCompatHC$FactoryWrapperHC.onCreateView(LayoutInflaterCompatHC.java:44)
  at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:725)
  at android.view.LayoutInflater.rInflate(LayoutInflater.java:806)
  at android.view.LayoutInflater.rInflate(LayoutInflater.java:809)
  at android.view.LayoutInflater.rInflate(LayoutInflater.java:809)
  at android.view.LayoutInflater.inflate(LayoutInflater.java:504)
  at android.view.LayoutInflater.inflate(LayoutInflater.java:414)
  at android.view.LayoutInflater.inflate(LayoutInflater.java:365)
  at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:256)
  at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:109)
  at com.trueblueoperator.swachhapp.StoryDetailFragment.onCreate(StoryDetailFragment.java:45)
  at android.app.Activity.performCreate(Activity.java:5990)
  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)
  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2278)
  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)
  at android.app.ActivityThread.access$800(ActivityThread.java:151)
  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
  at android.os.Handler.dispatchMessage(Handler.java:102)
  at android.os.Looper.loop(Looper.java:135)
  at android.app.ActivityThread.main(ActivityThread.java:5254)
  at java.lang.reflect.Method.invoke(Native Method)
  at java.lang.reflect.Method.invoke(Method.java:372)
  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)

这是包含 Recycler 视图的 Fragment 类的代码

FragmetnAllStory.java 文件

public class FragmentAllStory extends Fragment implements SwipeRefreshLayout.OnRefreshListener{// implements RecyclerView.OnScrollChangeListener {

//Creating a List of superheroes
private List<AllStoryData> allStoryDataList;

//Volley Request Queue
private RequestQueue requestQueue;

private ProgressBar progressBar;
//The request counter to send ?page=1, ?page=2  requests
private int requestCount = 1;
private RecyclerView recyclerView;
private SwipeRefreshLayout swipeRefreshLayout;
private RecyclerView.Adapter adapter;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setRetainInstance(true);

}

@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    requestCount = 1;
    View v = inflater.inflate(R.layout.fragment_all_story, container, false);
    progressBar = (ProgressBar) v.findViewById(R.id.progress_bar);

    swipeRefreshLayout = (SwipeRefreshLayout) v.findViewById(R.id.swipeRefreshLayout);
    swipeRefreshLayout.setOnRefreshListener(this);
    recyclerView = (RecyclerView) v.findViewById(R.id.recycler_view2);//new RecyclerView(getActivity());
    if(getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT) {
        recyclerView.setLayoutManager(new StaggeredGridLayoutManager(2, 1));
    }
    else {
        recyclerView.setLayoutManager(new StaggeredGridLayoutManager(3, 1));
    }
    allStoryDataList = new ArrayList<>();
    requestQueue = Volley.newRequestQueue(getContext());
    //getData();
    recyclerView.addOnScrollListener(new OnScrollListener() {
        @Override
        public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
            super.onScrollStateChanged(recyclerView, newState);
        }

        @Override
        public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
            super.onScrolled(recyclerView, dx, dy);

            if(isLastItemDisplaying(recyclerView))
            {
                getData();
            }

        }
    });
    adapter = new AllStoryAdapter(allStoryDataList, getActivity());
    recyclerView.setAdapter(adapter);


    return v;
}

//Request to get json from server we are passing an integer here
//This integer will used to specify the page number for the request ?page = requestcount
//This method would return a JsonArrayRequest that will be added to the request queue
    private JsonArrayRequest getDataFromServer(int requestCount) {

    //Displaying Progressbar
    progressBar.setVisibility(View.VISIBLE);


    //JsonArrayRequest of volley
    JsonArrayRequest jsonArrayRequest = new JsonArrayRequest(Config.DATA_URL + String.valueOf(requestCount),
            new Response.Listener<JSONArray>() {
                @Override
                public void onResponse(JSONArray response) {
                    //Calling method parseData to parse the json response
                    parseData(response);
                    //Hiding the progressbar
                    progressBar.setVisibility(View.GONE);
                }
            },
            new Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError error) {
                    progressBar.setVisibility(View.GONE);
                    //If an error occurs that means end of the list has reached
                    Toast.makeText(getContext(), "No More Items Available", Toast.LENGTH_SHORT).show();
                }
            });

    //Returning the request
    return jsonArrayRequest;
}

@Override
public void onResume() {
    super.onResume();
    requestCount =1;
    allStoryDataList.clear();
    getData();
}

//This method will get data from the web api
private void getData() {
    //Adding the method to the queue by calling the method getDataFromServer
    requestQueue.add(getDataFromServer(requestCount));
    //Incrementing the request counter
    requestCount++;
    swipeRefreshLayout.setRefreshing(false);
}

//This method will parse json data
private void parseData(JSONArray array) {
    for (int i = 0; i < array.length(); i++) {
        //Creating the superhero object
        AllStoryData allStoryData = new AllStoryData();
        JSONObject json = null;
        try {
            //Getting json
            json = array.getJSONObject(i);

            //Adding data to the superhero object
            allStoryData.setImageUrl(json.getString(Config.TAG_IMAGE_URL));
            allStoryData.setName(json.getString(Config.TAG_NAME));
            allStoryData.setPublisher(json.getString(Config.TAG_PUBLISHER));
        } catch (JSONException e) {
            e.printStackTrace();
        }
        //Adding the superhero object to the list
        allStoryDataList.add(allStoryData);
        Log.d("ListSuper", "" + allStoryDataList);
    }

    //Notifying the adapter that data has been added or changed
    adapter.notifyDataSetChanged();
}

//This method would check that the recyclerview scroll has reached the bottom or not
private boolean isLastItemDisplaying(RecyclerView recyclerView) {
    int[] info = new int[3];
    if (recyclerView.getAdapter().getItemCount() != 0) {
        ((StaggeredGridLayoutManager) recyclerView.getLayoutManager()).findLastCompletelyVisibleItemPositions(info);
        Log.d("info", "" + info[0] + " " + info[1]);
        if (info[0] == recyclerView.getAdapter().getItemCount() - 1 || info[1] == recyclerView.getAdapter().getItemCount() - 1 || info[2] == recyclerView.getAdapter().getItemCount() - 1)
            return true;
    }
    return false;
}

@Override
public void onRefresh() {
 requestCount =1;
    allStoryDataList.clear();
    getData();
}
}

StoryDe​​tailFragment.java 文件

public class StoryDetailFragment extends AppCompatActivity implements View.OnClickListener, AppBarLayout.OnOffsetChangedListener {

TextView textView;
TextView like;
ImageView imageView;
String requestString;
RequestParams params = new RequestParams();

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.fragment_story_detail); // error line 45

    // Intent Message sent from Broadcast Receiver
    requestString = getIntent().getStringExtra("Heading");

    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);
    ActionBar actionBar = getSupportActionBar();
    actionBar.setDisplayHomeAsUpEnabled(true);

    imageView = (ImageView) findViewById(R.id.story_image);
    like = (TextView) findViewById(R.id.likes);
    if (requestString != null) {
        textView = (TextView) findViewById(R.id.story_detail_message);
        textView.setText(requestString);
    }

    AppBarLayout appBarLayout = (AppBarLayout) findViewById(R.id.app_bar);
    appBarLayout.addOnOffsetChangedListener(this);
    FloatingActionButton fab1 = (FloatingActionButton) findViewById(R.id.fab1);
    FloatingActionButton fab2 = (FloatingActionButton) findViewById(R.id.fab2);
    fab1.setOnClickListener(this);
    fab2.setOnClickListener(this);

    getData();


}


private void getData() {

    params.put("heading", "" + requestString);
    // Make RESTful webservice call using AsyncHttpClient object
    AsyncHttpClient client = new AsyncHttpClient();

    client.get(Config.DETAIL_URL, params,
            new JsonHttpResponseHandler() {

                // When the response returned by REST has Http
                // response code '200'

                @Override
                public void onSuccess(JSONArray response) {

                    Log.d("result",""+response);
                    try {
                        JSONObject result = response.getJSONObject(0);
                        textView.setText((CharSequence) result.get("detailstory"));
                        like.setText((CharSequence) result.get("likes"));
                        String res = (String) result.get("images");
                        //URL url = new URL(res);
                        //Bitmap bmp = BitmapFactory.decodeStream(url.openConnection().getInputStream());
                        new DownloadImagesTask().execute(res);


                        Log.d("result",""+res);

                    } catch (JSONException e) {
                        e.printStackTrace();
                    }
                    //super.onSuccess(response);
                }


                // When the response returned by REST has Http
                // response code other than '200' such as '404',
                // '500' or '403' etc


                @Override
                public void onFailure(int statusCode, Throwable error, JSONArray errorResponse) {
                    // When Http response code is '404'
                    if (statusCode == 404) {
                        Toast.makeText(StoryDetailFragment.this,
                                "Requested resource not found",
                                Toast.LENGTH_LONG).show();
                    }
                    // When Http response code is '500'
                    else if (statusCode == 500) {
                        Toast.makeText(StoryDetailFragment.this,
                                "Something went wrong at server end",
                                Toast.LENGTH_LONG).show();
                    }
                    // When Http response code other than 404, 500
                    else {
                        Toast.makeText(
                                StoryDetailFragment.this,
                                "Unexpected Error occcured! [Most common Error: Device might "
                                        + "not be connected to Internet or remote server is not up and running], check for other errors as well",
                                Toast.LENGTH_LONG).show();
                    }
                }

            });
}

@Override
public void onBackPressed() {
    super.onBackPressed();
    finish();
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    int id = item.getItemId();

    if (id == android.R.id.home) {
        onBackPressed();
    }

    return super.onOptionsItemSelected(item);
}

@Override
public void onClick(View v) {
    switch (v.getId()) {
        case R.id.fab1:
            // Code for button like click

            break;

        case R.id.fab2:
            // Code for saving the articles


            break;
    }
}

@Override
public void onOffsetChanged(AppBarLayout appBarLayout, int verticalOffset) {
    if (Math.abs(verticalOffset) <= appBarLayout.getTotalScrollRange() - 120) {
        like.setVisibility(TextView.VISIBLE);
    } else {
        like.setVisibility(TextView.GONE);
    }
}

public class DownloadImagesTask extends AsyncTask<String, Void, Bitmap> {

    @Override
    protected Bitmap doInBackground(String... params) {
        return download_Image(params[0]);
    }

    @Override
    protected void onPostExecute(Bitmap result) {
        imageView.setImageBitmap(result);
    }

    private Bitmap download_Image(String url) {

        Bitmap bmp = null;
        try {
            URL ulrn = new URL(url);
            HttpURLConnection con = (HttpURLConnection) ulrn.openConnection();
            InputStream is = con.getInputStream();
            bmp = BitmapFactory.decodeStream(is);
            if (null != bmp)
                return bmp;

        } catch (Exception e) {
        }
        return bmp;
    }
}
}

XML 文件 fragment_story_detail.xml

<android.support.design.widget.CoordinatorLayout 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"
android:fitsSystemWindows="true"
tools:context="com.trueblueoperator.samplescrolling.ScrollingActivity">

<android.support.design.widget.AppBarLayout
    android:id="@+id/app_bar"
    android:layout_width="match_parent"
    android:layout_height="192dp"
    android:fitsSystemWindows="true"
    android:theme="@style/AppTheme.AppBarOverlay">

    <android.support.design.widget.CollapsingToolbarLayout
        android:id="@+id/toolbar_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:fitsSystemWindows="true"
        app:contentScrim="?attr/colorPrimary"
        app:layout_scrollFlags="scroll|exitUntilCollapsed">

        <ImageView
            android:id="@+id/story_image"
            android:layout_width="match_parent"
            android:layout_height="192dp"
            android:scaleType="centerCrop"
            android:src="@drawable/image"
            app:layout_collapseMode="parallax" />

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            app:layout_collapseMode="pin"
            app:popupTheme="@style/AppTheme.PopupOverlay" />

    </android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>

<include layout="@layout/content_scrolling"/>

<TextView
    android:id="@+id/likes"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:paddingLeft="5dp"
    android:paddingBottom="5dp"
    android:paddingTop="5dp"
    android:paddingRight="70dp"
    android:layout_marginRight="10dp"
    android:textSize="20dp"
    android:background="@drawable/rounded_corner"
    android:text="100"
    app:layout_anchor="@id/app_bar"
    app:layout_anchorGravity="right|bottom"
    />

<android.support.design.widget.FloatingActionButton
    android:id="@+id/fab1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:src="@drawable/like"
    app:layout_anchor="@id/app_bar"
    app:layout_anchorGravity="right|bottom" />

<android.support.design.widget.FloatingActionButton
    android:id="@+id/fab2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:src="@drawable/like"
    android:layout_gravity="bottom|right" />

</android.support.design.widget.CoordinatorLayout>

Answer 1

你的 logcat 抛出了什么

E/art: Throwing OutOfMemoryError "Failed to allocate a 22400012 byte 分配 4194304 个空闲字节和 5MB 直到 OOM"I/art: Alloc 14(448B) 个 AllocSpace 对象，0(0B) 个 LOS 对象，6% 空闲，58MB/62MB， 暂停 1.077 毫秒，总计 107.298 毫秒 I/art：强制收集 SoftReferences for 21MB allocation I/art: Alloc concurrent mark sweep GC 释放了 3(96B) 个 AllocSpace 对象，0(0B) 个 LOS 对象，6% 空闲， 58MB/62MB，暂停 620us 共 36.488ms E/art: Throwing OutOfMemoryError“无法分配 22400012 字节分配 4194304 空闲字节和 5MB 直到 OOM" D/skia: --- 分配失败 用于缩放位图

当应用程序尝试向堆空间区域添加更多数据但没有足够空间时，将触发 Java 堆空间错误。

请减小映像大小并增加 VM 堆大小 (AVD)。

每个 Android 驱动的设备都有不同数量的 RAM 可供系统使用，因此为每个应用提供不同的堆限制。您可以致电 getMemoryClass() 以估算您应用的可用堆（以 MB 为单位）。如果您的应用尝试分配比此处可用的更多的内存，它将收到 OutOfMemoryError。

建议

使用android:largeHeap="true" 不是一个好主意。

请阅读

1. Managing Your App's Memory

2. Strange out of memory issue while loading an image to a Bitmap object

Answer 2

调整图像位图的大小。

int height = (bitmap.getHeight() * 512 / bitmap.getWidth());
Bitmap scale = Bitmap.createScaledBitmap(bitmap, 512,height, true);
imageView.setImageBitmap(scale);

• 在位图中使用您自己的位图，您下载并转换为位图。

Answer 3

为避免此问题，您可以在manifest.xml 文件的<application/> 标签中添加android:largeHeap="true"。