Java 内存泄漏与优化

我目前正在开发一个Android应用程序，我不能结束它，因为“内存不足”这类问题很少，我认为我的代码中有两部分可能导致泄漏

• 第一：应用程序必须同时播放12个音调（10个不同频率）。我在堆栈溢出上发现了一段代码，允许我同时播放一系列频率：（我认为这是由AudioTrack引起的，但我不知道如何解决）
  要解码位图，我使用以下方法：

  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;
  
  }
  

  私有位图解码文件（文件f）{
  试一试{
  //解码图像大小
  BitmapFactory.Options o=新的BitmapFactory.Options（）；
  o、 inJustDecodeBounds=true；
  解码流（新的FileInputStream（f），null，o）；
  //找到正确的刻度值。它应该是2的幂。
  所需的最终int_尺寸=70；
  内部宽度=o.向外宽度，高度=o.向外高度；
  int标度=1；
  while（true）{
  如果（width_tmp/2只是一个简单的想法：确保关闭InputStream，
  BitmapFactory.decodeStream（）
  在源代码中似乎没有这样做
  把你的日志放在它说它泄露了内存的地方10个位图，这是一个很小的内存，你是如何解码的？把你的代码贴出来，给我贴上标签谢谢。这是logcat OutofMemory由ImageView引起的。你能记录下刻度，看看总是返回的数字是多少吗？既然你只需要一个具有固定大小的位图我想你不需要循环缩放它。只需给出一个固定的inSampleSize=4或更高。或者只使用scaleBitmap，但这会降低质量，但我认为它不会那么明显，因为图像大小会很小。
  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
      }
  });  }
  
  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)
  
  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;
  
  }