java.lang.OutOfMemoryError 图片

Question

我正在尝试从 Feed 中获取图片，但出现此错误，有人可以帮我解决这个问题吗。

错误:

java.lang.OutOfMemoryError
at android.graphics.BitmapFactory.nativeDecodeStream(Native Method)
at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:623)
at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:696)
at com.ultrait.cobat.FindPropertyActivity.DownloadImage(FindPropertyActivity.java:140)
at com.ultrait.cobat._09_LatestDetailed$7.run(_09_LatestDetailed.java:262)
at java.lang.Thread.run(Thread.java:841)

我的代码:

<!--  public class _06_Photos extends Activity implements ViewFactory {

private static final int SWIPE_MIN_DISTANCE = 120;
private static final int SWIPE_MAX_OFF_PATH = 250;
private static final int SWIPE_THRESHOLD_VELOCITY = 200;


//GUI  Components
TextView tv_counter;
ImageSwitcher imageSwitcher;

Button b_play;
Button b_next;
Button b_previous;
Button b_more;

FrameLayout topFrame, bottomFrame;

//Images and Stuff
String [] str_imageURLs;
Bitmap [] bm_images;
String propertyid;
int picNum = 0;
boolean play;
boolean stop;
Handler handler;

Thread playThread;


public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.xl_06_photos);

    handler = new Handler();
    propertyid = "";
    playThread = new Thread(Play);

    play = false;
    stop = false;
    playThread.start();


    str_imageURLs = new String[10];
    for(int i=0; i<10;++i)
        str_imageURLs[i] = "";

    bm_images = new Bitmap[10];
    for(int i=0; i<10;++i)
        bm_images[i] = BitmapFactory.decodeResource(getResources(), R.drawable.downloading);

    InitView();

    Bundle extras = getIntent().getExtras();
    if (extras != null) {
        str_imageURLs[0] = extras.getString("img1");
        str_imageURLs[1] = extras.getString("img2");
        str_imageURLs[2] = extras.getString("img3");
        str_imageURLs[3] = extras.getString("img4");
        str_imageURLs[4] = extras.getString("img5");
        str_imageURLs[5] = extras.getString("img6");
        str_imageURLs[6] = extras.getString("img7");
        str_imageURLs[7] = extras.getString("img8");
        str_imageURLs[8] = extras.getString("img9");
        str_imageURLs[9] = extras.getString("img10");
    }

    for(int i=0; i<9; i++)
        System.out.println(str_imageURLs[i]);



    new Thread(new Runnable() {
        public void run() {
            for(int i=0; i<9; ++i)
            {
                try{
                    bm_images[i] = FindPropertyActivity.DownloadImage(str_imageURLs[i]);
                }
                catch(Exception e){
                    System.out.println("Image" + i + " not downloaded - " + e);
                }

                try{
                    if(bm_images[i] == null){
                        System.out.println("Bitmap " + i + " is null");
                        bm_images[i] = BitmapFactory.decodeResource(getResources(), R.drawable.download_error);
                    }

                    if(picNum == i)
                        handler.post(SetPic);
                }
                catch(Exception e){
                    System.out.println("PicNum null/visiablity" + i + " not setCorrectly - " + e);
                }
            }
            System.gc();
        }
    }).start();
}

private void InitView(){

    handler.post(SetPic);
    tv_counter = (TextView)findViewById(R.id.photo_tv_counter);
    imageSwitcher = (ImageSwitcher)findViewById(R.id.photo_imageSwitcher);
    imageSwitcher.setFactory(this);

    topFrame = (FrameLayout)findViewById(R.id.photo_topFrame);
    bottomFrame = (FrameLayout)findViewById(R.id.photo_bottomFrame);

    final GestureDetector gestureDetector = new GestureDetector(new MyGestureDetector());
    imageSwitcher.setOnTouchListener(new View.OnTouchListener() {

        public boolean onTouch(View v, MotionEvent event) {
            gestureDetector.onTouchEvent(event);
            return true;
        }
    });


    b_play = (Button)findViewById(R.id.photo_b_play);
    if(play){   
        b_play.setBackgroundDrawable(getResources().getDrawable(R.drawable.button_pause));
        topFrame.setVisibility(View.INVISIBLE);
        bottomFrame.setVisibility(View.INVISIBLE);
    }
    else{
        b_play.setBackgroundDrawable(getResources().getDrawable(R.drawable.button_play)); 

    }
    b_play.setOnTouchListener(new View.OnTouchListener() {

        public boolean onTouch(View v, MotionEvent event) {
            if (event.getAction() == MotionEvent.ACTION_DOWN) {
                Drawable background =  v.getBackground();
                background.setColorFilter(0xFF7A7A7A, PorterDuff.Mode.MULTIPLY);
                v.setBackgroundDrawable(background);
            } else if (event.getAction() == MotionEvent.ACTION_UP) {
                Drawable background =  v.getBackground();
                background.setColorFilter(null);
                v.setBackgroundDrawable(background);

                if(play){
                    play = false;
                    b_play.setBackgroundDrawable(getResources().getDrawable(R.drawable.button_play));
                }

                else{
                    play = true;
                    b_play.setBackgroundDrawable(getResources().getDrawable(R.drawable.button_pause));
                    topFrame.setVisibility(View.INVISIBLE);
                    bottomFrame.setVisibility(View.INVISIBLE);
                }   
            }
            return false;
        }
    });



    b_previous = (Button)findViewById(R.id.photo_b_previous);
    b_previous.setOnTouchListener(new View.OnTouchListener() {

        public boolean onTouch(View v, MotionEvent event) {
            if (event.getAction() == MotionEvent.ACTION_DOWN) {
                Drawable background =  v.getBackground();
                background.setColorFilter(0xFF7A7A7A, PorterDuff.Mode.MULTIPLY);
                v.setBackgroundDrawable(background);
            } else if (event.getAction() == MotionEvent.ACTION_UP) {
                Drawable background =  v.getBackground();
                background.setColorFilter(null);
                v.setBackgroundDrawable(background);

                PreviousPic();
            }
            return false;
        }
    });

    b_next = (Button)findViewById(R.id.photo_b_next);
    b_next.setOnTouchListener(new View.OnTouchListener() {

        public boolean onTouch(View v, MotionEvent event) {
            if (event.getAction() == MotionEvent.ACTION_DOWN) {
                Drawable background =  v.getBackground();
                background.setColorFilter(0xFF7A7A7A, PorterDuff.Mode.MULTIPLY);
                v.setBackgroundDrawable(background);
            } else if (event.getAction() == MotionEvent.ACTION_UP) {
                Drawable background =  v.getBackground();
                background.setColorFilter(null);
                v.setBackgroundDrawable(background);

                NextPic();
            }
            return false;
        }
    });


}

public void onDestroy(){
    super.onDestroy();
    stop = true;
}

private final Runnable SetPic = new Runnable() {
    public void run() {
        //iv_activity.setVisibility(View.INVISIBLE);
        Drawable d =new BitmapDrawable(bm_images[picNum]);
        imageSwitcher.setImageDrawable(d);
        System.out.println("Pic Set");

        tv_counter.setText("" + (picNum+1) + "/5");
    }
};

private final Runnable Play = new Runnable() {
    public void run() {
        while(!stop){
            try{
                Thread.sleep(3000);
                handler.post(new Runnable() {
                    public void run() {
                        if(play)
                            NextPic();
                    }
                });
            }
            catch(Exception e){
                System.out.println("Play Error - " + e);
            }
        }
    }
};


protected void NextPic(){

    try{
        picNum++;
        if(picNum > 9)
            picNum = 0;

        tv_counter.setText("" + (picNum+1) + "/10");

        imageSwitcher.setInAnimation(this, R.anim.slide_in_left ); // added
        imageSwitcher.setOutAnimation(this, R.anim.slide_out_left); // added
        Drawable d =new BitmapDrawable(bm_images[picNum]);
        imageSwitcher.setImageDrawable(d);
        System.out.println("Next Pic");
    }
    catch(Exception e){
        System.out.println("Next Fail " + e);
        //imageSwitcher.setImageResource(R.drawable.download_error);
        imageSwitcher.setImageDrawable(null);
    }
}

protected void PreviousPic(){


        picNum--;
        if(picNum < 0)
            picNum = 9;

        tv_counter.setText("" + (picNum+1) + "/10");
    try{    
        imageSwitcher.setInAnimation(this, R.anim.slide_in_right ); // added
        imageSwitcher.setOutAnimation(this, R.anim.slide_out_right); // added
        Drawable d =new BitmapDrawable(bm_images[picNum]);
        imageSwitcher.setImageDrawable(d);
        System.out.println("Previous Pic");
    }
    catch(Exception e){
        System.out.println("Previous Fail " + e);
        //imageSwitcher.setImageResource(R.drawable.download_error);
        imageSwitcher.setImageDrawable(null);
    }

}
protected void ChangeBarVisibles(){
    if(topFrame.isShown()){
        topFrame.setVisibility(View.INVISIBLE);
        bottomFrame.setVisibility(View.INVISIBLE);
    }
    else{
        topFrame.setVisibility(View.VISIBLE);
        bottomFrame.setVisibility(View.VISIBLE);
    }
}


public View makeView() 
{
    ImageView imageView = new ImageView(this);
    imageView.setBackgroundColor(0xFF000000);
    imageView.setScaleType(ImageView.ScaleType.FIT_CENTER);
    imageView.setLayoutParams(new 
            ImageSwitcher.LayoutParams(
                    LayoutParams.FILL_PARENT,
                    LayoutParams.FILL_PARENT));
    return imageView;
}

class MyGestureDetector extends SimpleOnGestureListener {
    @Override
    public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
        try {

            if (Math.abs(e1.getY() - e2.getY()) > SWIPE_MAX_OFF_PATH)
                return false;
            // right to left swipe
            if(e1.getX() - e2.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
               //Toast.makeText(SelectFilterActivity.this, "Left Swipe", Toast.LENGTH_SHORT).show();
               NextPic();
               //return true;
           }  else if (e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
               //Toast.makeText(SelectFilterActivity.this, "Right Swipe", Toast.LENGTH_SHORT).show();
            PreviousPic();
            //return true;
           }    
       } catch (Exception e) {
           // nothing
       }
       return true;
   }

   public boolean onSingleTapUp(MotionEvent e){
       if(e.getAction() == MotionEvent.ACTION_UP){
            ChangeBarVisibles();
       }
       return true;
    }
}

@Override
public void onConfigurationChanged(Configuration newConfig) {
  super.onConfigurationChanged(newConfig);
  setContentView(R.layout.xl_06_photos);

  InitView();
}

} -->

查找属性 Activity :

//从网上下载图片的公共(public)静态方法

public static Bitmap DownloadImage(String URL){

    Bitmap bmImg = null;
    URL myFileUrl =null;

    try {
        myFileUrl= new URL(URL);
    } catch (Exception e) {
        //e.printStackTrace();
        System.out.println(e);
    }
    try {
        HttpURLConnection conn= (HttpURLConnection)myFileUrl.openConnection();
        conn.setDoInput(true);
        conn.connect();
        InputStream is = conn.getInputStream();
        bmImg = BitmapFactory.decodeStream(is);
    }
    catch(Exception e){
        System.out.println(e);
    }
    return bmImg;
}

public static Bitmap DownloadImage2(String URL){

    Bitmap bmImg = null;
    URL myFileUrl =null;

    try {
        myFileUrl= new URL(URL);
    } catch (Exception e) {
        //e.printStackTrace();
        System.out.println(e);
    }
    try {
        HttpURLConnection conn= (HttpURLConnection)myFileUrl.openConnection();
        conn.setDoInput(true);
        conn.connect();
        InputStream is = conn.getInputStream();
        BitmapFactory.Options options=new BitmapFactory.Options();
        options.inSampleSize = 7;
        bmImg=BitmapFactory.decodeStream(is,null,options);
        //bmImg = BitmapFactory.decodeStream(is);

    }
    catch(Exception e){
        System.out.println(e);
    }
    return bmImg;
}

Answer 1

位图确实使用了大量 RAM，而 OOM 在其中很常见。除了上述所有建议的解决方案，您还应该在 AndroidManifest.xml 的标签内添加 android:largeHeap="true"。通过这个标签，Android 为您的应用程序提供了更多的 RAM，并修复了一些最常见的问题。这是一种解决方法，而不是最佳解决方案，更好的选择当然是尽可能修复实现。