Question

我的应用程序一直在崩溃，我无法理解它的错误，到处寻找答案，据我所知，人们说是因为设备内存不足，我不明白是什么原因造成的？

是因为我的res / drawable文件夹中的图像太多了吗？
是因为我的res / drawable文件夹中有一个相当高分辨率的图像？

如果问题是上述问题之一，解决方案是什么？把图像放在assets文件夹中还是什么？下面是错误堆栈。谢谢。

MainActivity.java

public class MainActivity extends Activity {

Class <? extends Activity> classVariable;
int last_level;
TextView text_play, text_level, game_title;
RelativeLayout playBtn, levelBtn;

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

    playBtn = (RelativeLayout) findViewById(R.id.playBtn);
    levelBtn = (RelativeLayout) findViewById(R.id.levelBtn);
    game_title = (TextView) findViewById(R.id.game_title);
    text_play = (TextView) findViewById(R.id.text_play);
    text_level = (TextView) findViewById(R.id.text_level);

    Typeface tf  = Typeface.createFromAsset(getAssets(), "fonts/snap-itc.ttf");
    text_play.setTypeface(tf);
    text_level.setTypeface(tf);
    game_title.setTypeface(tf);

    // Check if file exists
    File file = getBaseContext().getFileStreamPath("levels.json");
    if (file.exists()) {
        // Get the JSON Object from the data
        JSONObject parent = this.parseJSONData();

        try {
            last_level = parent.getInt("level");
        } catch (JSONException e) {
            e.printStackTrace();
        }
    }

    switch (last_level) {
        case 1:
            classVariable = Level002Activity.class;
            break;
        case 2:
            classVariable = Level003Activity.class;
            break;
        case 3:
            classVariable = Level004Activity.class;
            break;
        case 5:
            classVariable = Level005Activity.class;
            break;
        default:
            classVariable = Level001Activity.class;
    }

    playBtn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent i = new Intent(getApplicationContext(),
                    Level002Activity.class);
            startActivity(i);
        }
    });

    levelBtn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent in = new Intent(getApplicationContext(),
                    Level001Activity.class);
            startActivity(in);
        }
    });

}

public JSONObject parseJSONData() {
    String JSONString = null;
    JSONObject jsonObject = null;
    try {
        // Open the inputStream to the file
        FileInputStream fin = openFileInput("levels.json");

        int sizeOfJSONFile = fin.available();

        // array that will store all the data
        byte[] bytes = new byte[sizeOfJSONFile];

        // reading data into the array from the file
        fin.read(bytes);

        // close the input stream
        fin.close();

        JSONString = new String(bytes, "UTF-8");
        jsonObject = new JSONObject(JSONString);

    } catch (IOException e) {
        e.printStackTrace();
        return null;
    } catch (JSONException x) {
        x.printStackTrace();
        return null;
    }
    return jsonObject;
}

}

调用ChooseLevelActivity.class

ChooseLevelActivity.java

public class ChooseLevelActivity extends Activity implements View.OnClickListener {

ImageView level001, level002, level003, level004, level005;
int last_level, best_move;
String best_time, level_selected;
TextView levelName, bestMove, bestTime;
Class <? extends Activity> classVariable;
Button playBtn;

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

    level001 = (ImageView) findViewById(R.id.level001);
    level002 = (ImageView) findViewById(R.id.level002);
    level003 = (ImageView) findViewById(R.id.level003);
    level004 = (ImageView) findViewById(R.id.level004);
    level005 = (ImageView) findViewById(R.id.level005);

    levelName = (TextView) findViewById(R.id.level_name);
    bestMove = (TextView) findViewById(R.id.best_move);
    bestTime = (TextView) findViewById(R.id.best_time);
    playBtn = (Button) findViewById(R.id.playBtn);

    // Get the JSON Object from the data
    JSONObject parent = parseJSONData("levels.json");

    // Array of ImageView
    final ImageView[] levelsArray = {level001, level002, level003, level004, level005};

    // This will store all the values inside "best_move and time" in an element string
    try {
        last_level = parent.getInt("level");
    } catch (JSONException e) {
        e.printStackTrace();
    }

    for(int i = 0; i < last_level; i++) {
        levelsArray[i].setVisibility(View.VISIBLE);
        levelsArray[i].setOnClickListener(this);
    }
}

@Override
public void onClick(View v) {

    switch (v.getId()) {
        case R.id.level001:
            level_selected = "level001";
            classVariable = Level001Activity.class;
            break;
        case R.id.level002:
            level_selected = "level002";
            classVariable = Level002Activity.class;
            break;
        case R.id.level003:
            level_selected = "level003";
            classVariable = Level003Activity.class;
            break;
        case R.id.level004:
            level_selected = "level004";
            classVariable = Level004Activity.class;
            break;
        case R.id.level005:
            level_selected = "level005";
            classVariable = Level005Activity.class;
            break;
    }

    String fileName = "record_" + level_selected + ".json";

    // Get the JSON Object from the data
    JSONObject parents = parseJSONData(fileName);

    // This will store all the values inside "best_move and time" in an element string
    try {
        best_move = parents.getInt("best_move");
        best_time = parents.getString("best_time");
    } catch (JSONException e) {
       // e.printStackTrace();
    }

    levelName.setText("Level " + level_selected.substring(5));
    bestMove.setText("Best Move: " + best_move);
    bestTime.setText("Best Time: " + best_time);

    playBtn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent i = new Intent(getApplicationContext(),
                    classVariable);
            startActivity(i);
            finish();
        }
    });

}

public JSONObject parseJSONData(String file) {
    String JSONString = null;
    JSONObject jsonObject = null;
    try {
        // Open the inputStream to the file
        FileInputStream fin = openFileInput(file);

        int sizeOfJSONFile = fin.available();

        // array that will store all the data
        byte[] bytes = new byte[sizeOfJSONFile];

        // reading data into the array from the file
        fin.read(bytes);

        // close the input stream
        fin.close();

        JSONString = new String(bytes, "UTF-8");
        jsonObject = new JSONObject(JSONString);

    } catch (IOException e) {
        e.printStackTrace();
        return null;
    } catch (JSONException x) {
        x.printStackTrace();
        return null;
    }
    return jsonObject;
}
}

错误堆栈：

Process: com.example.ed.pieces, PID: 12939
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.ed.pieces/com.example.ed.pieces.Level001Activity}: android.view.InflateException: Binary XML file line #289: Binary XML file line #289: Error inflating class <unknown>
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2416)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
        at android.app.ActivityThread.-wrap11(ActivityThread.java)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
        at android.os.Handler.dispatchMessage(Handler.java:102)
        at android.os.Looper.loop(Looper.java:148)
        at android.app.ActivityThread.main(ActivityThread.java:5417)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: android.view.InflateException: Binary XML file line #289: Binary XML file line #289: Error inflating class <unknown>
        at android.view.LayoutInflater.inflate(LayoutInflater.java:539)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
        at com.android.internal.policy.PhoneWindow.setContentView(PhoneWindow.java:393)
        at android.app.Activity.setContentView(Activity.java:2166)
        at com.example.ed.pieces.Level001Activity.onCreate(Level001Activity.java:62)
        at android.app.Activity.performCreate(Activity.java:6237)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
        at android.app.ActivityThread.-wrap11(ActivityThread.java)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
        at android.os.Handler.dispatchMessage(Handler.java:102)
        at android.os.Looper.loop(Looper.java:148)
        at android.app.ActivityThread.main(ActivityThread.java:5417)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)

Caused by: android.view.InflateException: Binary XML file line #289: Error inflating class <unknown>
        at android.view.LayoutInflater.createView(LayoutInflater.java:645)
        at com.android.internal.policy.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:58)
        at android.view.LayoutInflater.onCreateView(LayoutInflater.java:694)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:762)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
        at android.view.LayoutInflater.rInflate(LayoutInflater.java:835)
        at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798)
        at android.view.LayoutInflater.rInflate(LayoutInflater.java:838)
        at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798)
        at android.view.LayoutInflater.rInflate(LayoutInflater.java:838)
        at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798)
        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 com.android.internal.policy.PhoneWindow.setContentView(PhoneWindow.java:393)
        at android.app.Activity.setContentView(Activity.java:2166)
        at com.example.ed.pieces.Level001Activity.onCreate(Level001Activity.java:62)
        at android.app.Activity.performCreate(Activity.java:6237)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
        at android.app.ActivityThread.-wrap11(ActivityThread.java)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
        at android.os.Handler.dispatchMessage(Handler.java:102)
        at android.os.Looper.loop(Looper.java:148)
        at android.app.ActivityThread.main(ActivityThread.java:5417)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)


 Caused by: java.lang.reflect.InvocationTargetException
        at java.lang.reflect.Constructor.newInstance(Native Method)
        at android.view.LayoutInflater.createView(LayoutInflater.java:619)
        at com.android.internal.policy.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:58)
Caused by: java.lang.OutOfMemoryError: Failed to allocate a 10240012 byte allocation with 4194304 free bytes and 7MB 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:1080)
        at android.content.res.Resources.loadDrawableForCookie(Resources.java:2635)
        at android.content.res.Resources.loadDrawable(Resources.java:2540)
        at android.content.res.TypedArray.getDrawable(TypedArray.java:870)
        at android.view.View.<init>(View.java:3948)
        at android.widget.ImageView.<init>(ImageView.java:145)
        at android.widget.ImageView.<init>(ImageView.java:140)
        at android.widget.ImageView.<init>(ImageView.java:136)

Answer 1

内存不足错误

当您为处理多个图像集或大位图或某些动画内容的应用程序开发时，内存不足错误是非常常见的错误。在这种情况下，我们必须在处理图像或对象分配和释放时非常小心和高效。当分配超过堆限制或您的进程需要超过堆限制的内存量时，会出现OOM错误。

在Android中，每个应用程序都在Linux进程中运行。每个Linux进程都在其中运行虚拟机（Dalvik虚拟机）。进程可以要求的内存有一个限制，它对于不同的设备是不同的，并且对于手机和平板电脑也是不同的。当某个进程需要比其限制更高的内存时，会导致错误，即内存不足错误。

尝试这可以帮助您在清单文件中添加此标记。

android:largeHeap="true"

它将为您的应用分配大堆

要将Drawable转换为位图，请使用此

Drawable myDrawable = getResources().getDrawable(R.drawable.logo);
Bitmap myLogo = ((BitmapDrawable) myDrawable).getBitmap();

使用此方法，您可以解码图像

public static Bitmap decodeImageFile(File f,int WIDTH,int HIGHT){
             try {
                 //Decode image size
                 BitmapFactory.Options o = new BitmapFactory.Options();
                 o.inJustDecodeBounds = true;
                 BitmapFactory.decodeStream(new FileInputStream(f),null,o);

                 //The new size we want to scale to
                 final int REQUIRED_WIDTH=WIDTH;
                 final int REQUIRED_HIGHT=HIGHT;
                 //Find the correct scale value. It should be the power of 2.
                 int scale=1;
                 while(o.outWidth/scale/2>=REQUIRED_WIDTH && o.outHeight/scale/2>=REQUIRED_HIGHT)
                     scale*=2;

                 //Decode with inSampleSize
                 BitmapFactory.Options o2 = new BitmapFactory.Options();
                 o2.inSampleSize=scale;
                 return BitmapFactory.decodeStream(new FileInputStream(f), null, o2);
             } catch (FileNotFoundException e) {}
             return null;
            }

然后在使用此方法的地方调用此方法：

Bitmap b = decodeImageFile(f, 1280, 720);

Answer 2

如果您的图像分辨率很高，我建议您使用缓冲区加载图像。

String defCoverPath = "drawable/" + "def_cover" + ".png";
yourView.setBackgroundDrawable(LoadResourceImage(defCoverPath));


public static BitmapDrawable LoadResourceImage(String resPath){
        AssetManager assets = MyApp.GetContext().getResources().getAssets();
        BitmapDrawable bitmapDrawable = new BitmapDrawable();

        try {
            InputStream buffer = new BufferedInputStream((assets.open(resPath)));
            Bitmap bitmap = BitmapFactory.decodeStream(buffer);
            bitmapDrawable = new BitmapDrawable(MyApp.GetContext().getResources(), bitmap);
        }catch (FileNotFoundException e){
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

        return bitmapDrawable;
    }

Android应用程序不断崩溃到OutOfMemoryError

2 个答案: