内存泄漏和优化

Question

I'm currently developing an Android application and I can't end it because of few issue as "Out of Memory", I think there is two part in my code which could cause leak.

• First : The application has to play like 12 tones at the same time (10 different frequencies). I found a piece of code on Stack Overflow which allow me to play a list of frequencies at the same time : (I think this is cause by AudioTrack but I don't know how to solve it)

   public static void runList(final List<Double> freq) { if(audioTrack!=null){ audioTrack.release(); audioTrack=null; } final List<AudioTrack> audioTrackList = new ArrayList(); final AudioTrack audioTrack0; final AudioTrack audioTrack1; genTone(freq.get(0)); audioTrack0 = new AudioTrack(AudioManager.STREAM_MUSIC, (int) sampleRate, AudioFormat.CHANNEL_OUT_DEFAULT,AudioFormat.ENCODING_PCM_16BIT, generatedSnd.length, AudioTrack.MODE_STREAM); audioTrack0.play(); audioTrack0.write(generatedSnd, 0, generatedSnd.length); genTone(freq.get(1)); audioTrack1 = new AudioTrack(AudioManager.STREAM_MUSIC, (int) sampleRate, AudioFormat.CHANNEL_OUT_DEFAULT,AudioFormat.ENCODING_PCM_16BIT, generatedSnd.length, AudioTrack.MODE_STREAM); audioTrack1.play(); audioTrack1.write(generatedSnd, 0, generatedSnd.length); handler.postDelayed(new Runnable() { @Override public void run() { //compteur : not more than 2 AudioTrack audioTrack0.release(); audioTrack1.release(); } }, 1000); } 

(With this I can only play 2 tones at the same time)

• Then : In the same activity the application has to display on the screen 10 image View, each one is moving with a different way. All these image View have been previously decoded from Bitmap. I think that the leak come from here. I've tried to release Bitmap after using it, but nothing to do, I can only display like 3 or 4 image moving on the screen before a crash (Out of Memory). There is maybe a better and lighter way to anim image, for example, to animate an image and make it follow a triangle way, I use this :

   private void triangleAnim(final ImageView patternImage, final int bpm, final int i, final double frequency) { resetN(); int randomLeft = (int)(Math.random() * (maxRandomLeft-minRandomLeft)) + minRandomLeft; int randomTop = (int)(Math.random() * (maxRandomTop-minRandomTop)) + minRandomTop; final Animation anim = new TranslateAnimation(randomLeft, randomLeft + 300,randomTop,randomTop + 300 ); anim.setDuration(60000/bpm); final Animation anim2 = new TranslateAnimation(randomLeft +300, randomLeft-300, randomTop+300, randomTop+300 ); anim2.setDuration(60000/bpm); final Animation anim3 = new TranslateAnimation(randomLeft-300, randomLeft, randomTop+300, randomTop ); anim3.setDuration(60000/bpm); su = new SoundUtils(); su.setDuration(60000/bpm); patternImage.startAnimation(anim); anim.setAnimationListener(new Animation.AnimationListener() { @Override public void onAnimationEnd(Animation animation) { patternImage.startAnimation(anim2); ; } @Override public void onAnimationRepeat(Animation animation) { } @Override public void onAnimationStart(Animation animation) { // TODO Auto-generated method stub } }); anim2.setAnimationListener(new Animation.AnimationListener() { @Override public void onAnimationEnd(Animation animation) { patternImage.startAnimation(anim3); ; incrementN(); } @Override public void onAnimationRepeat(Animation animation) { } @Override public void onAnimationStart(Animation animation) { // TODO Auto-generated method stub } }); anim3.setAnimationListener(new Animation.AnimationListener() { @Override public void onAnimationEnd(Animation animation) { if(n <= i){ patternImage.startAnimation(anim); } } @Override public void onAnimationRepeat(Animation animation) { } @Override public void onAnimationStart(Animation animation) { // TODO Auto-generated method stub } }); } 

• Finally, is there any software or code or anything else that could help me to find where my application has leak of memory ? I can link you errors from LogCat if needed.

Sorry for my english, hope there is not much mistakes.

UPDATE :

Here is my logcat :

07-31 17:54:03.931: E/AndroidRuntime(15181): java.lang.OutOfMemoryError
07-31 17:54:03.931: E/AndroidRuntime(15181):    at      android.graphics.Bitmap.nativeCreate(Native Method)
07-31 17:54:03.931: E/AndroidRuntime(15181):    at android.graphics.Bitmap.createBitmap(Bitmap.java:903)
07-31 17:54:03.931: E/AndroidRuntime(15181):    at android.graphics.Bitmap.createBitmap(Bitmap.java:880)
07-31 17:54:03.931: E/AndroidRuntime(15181):    at android.graphics.Bitmap.createBitmap(Bitmap.java:847)
07-31 17:54:03.931: E/AndroidRuntime(15181):    at org.opencv.android.CameraBridgeViewBase.AllocateCache(CameraBridgeViewBase.java:451)
07-31 17:54:03.931: E/AndroidRuntime(15181):    at org.opencv.android.JavaCameraView.initializeCamera(JavaCameraView.java:184)
07-31 17:54:03.931: E/AndroidRuntime(15181):    at org.opencv.android.JavaCameraView.connectCamera(JavaCameraView.java:239)
07-31 17:54:03.931: E/AndroidRuntime(15181):    at org.opencv.android.CameraBridgeViewBase.onEnterStartedState(CameraBridgeViewBase.java:355)
07-31 17:54:03.931: E/AndroidRuntime(15181):    at org.opencv.android.CameraBridgeViewBase.processEnterState(CameraBridgeViewBase.java:318)
07-31 17:54:03.931: E/AndroidRuntime(15181):    at org.opencv.android.CameraBridgeViewBase.checkCurrentState(CameraBridgeViewBase.java:311)
07-31 17:54:03.931: E/AndroidRuntime(15181):    at org.opencv.android.CameraBridgeViewBase.enableView(CameraBridgeViewBase.java:228)
07-31 17:54:03.931: E/AndroidRuntime(15181):    at ui.fragment.TakePictureFragment$1.onManagerConnected(TakePictureFragment.java:71)
07-31 17:54:03.931: E/AndroidRuntime(15181):    at org.opencv.android.AsyncServiceHelper$1.onServiceConnected(AsyncServiceHelper.java:318)
07-31 17:54:03.931: E/AndroidRuntime(15181):    at android.app.LoadedApk$ServiceDispatcher.doConnected(LoadedApk.java:1119)
07-31 17:54:03.931: E/AndroidRuntime(15181):    at android.app.LoadedApk$ServiceDispatcher$RunConnection.run(LoadedApk.java:1136)
07-31 17:54:03.931: E/AndroidRuntime(15181):    at android.os.Handler.handleCallback(Handler.java:733)
07-31 17:54:03.931: E/AndroidRuntime(15181):    at android.os.Handler.dispatchMessage(Handler.java:95)
07-31 17:54:03.931: E/AndroidRuntime(15181):    at android.os.Looper.loop(Looper.java:157)
07-31 17:54:03.931: E/AndroidRuntime(15181):    at android.app.ActivityThread.main(ActivityThread.java:5356)
07-31 17:54:03.931: E/AndroidRuntime(15181):    at java.lang.reflect.Method.invokeNative(Native Method)
07-31 17:54:03.931: E/AndroidRuntime(15181):    at java.lang.reflect.Method.invoke(Method.java:515)
07-31 17:54:03.931: E/AndroidRuntime(15181):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1265)
07-31 17:54:03.931: E/AndroidRuntime(15181):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1081)
07-31 17:54:03.931: E/AndroidRuntime(15181):    at dalvik.system.NativeStart.main(Native Method)

To decode Bitmaps I use this :

private Bitmap decodeFile(File f){
    try {
        //decode image size
        BitmapFactory.Options o = new BitmapFactory.Options();
        o.inJustDecodeBounds = true;
        BitmapFactory.decodeStream(new FileInputStream(f),null,o);              
        //Find the correct scale value. It should be the power of 2.
        final int REQUIRED_SIZE=70;
        int width_tmp=o.outWidth, height_tmp=o.outHeight;
        int scale=1;
        while(true){
            if(width_tmp/2<REQUIRED_SIZE || height_tmp/2<REQUIRED_SIZE)
                break;
            width_tmp/=2;
            height_tmp/=2;
            scale++;
        }

        //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;

}

Answer 1

Just one quick thought: Make sure to close your InputStream(s), BitmapFactory.decodeStream(); doesn't seem to do this in the source code