android ImageView 頻繁切換圖片 OOM

最近在幫一個朋友寫一個android 軟件，頻繁的用ImageView 更換圖片。   結果常常出現OOM   後來修改把ImageView加載圖片自己來管理，問題解決了，不敢獨享，拿出來與各位同學分享     private void showImage(int index) {   int resid = R.drawable.circle_01;   switch (index) {   case 1:   resid = R.drawable.circle_01;   break;   case 2:   resid = R.drawable.circle_02;   break;   case 3:   resid = R.drawable.circle_03;   break;   case 4:   resid = R.drawable.circle_04;   break;   case 5:   resid = R.drawable.circle_05;   break;   case 6:   resid = R.drawable.circle_06;   break;   case 7:   resid = R.drawable.circle_07;   break;   case 8:   resid = R.drawable.circle_08;   break;   case 9:   resid = R.drawable.circle_09;   break;   case 10:   resid = R.drawable.circle_10;   break;   case 11:   resid = R.drawable.circle_11;   break;   case 12:   resid = R.drawable.circle_12;   break;   }     //把歷史的ImageView 圖片對象（image_)釋放   BitmapDrawable bitmapDrawable = (BitmapDrawable)image_.getBackground();   if(bitmapDrawable!=null){   Bitmap hisBitmap = bitmapDrawable.getBitmap();   if(hisBitmap.isRecycled()==false)   {   hisBitmap.recycle();   }   }   //上面的代碼一定要做，否則不會超過30分鐘可定會出現exit,當然我的timer設置的時間比較短。。。。。timer.schedule(task, 5, 5);         //下面代碼是網上通常搜到的源碼例子，但是不能解決，智能優化，只有加上上面的才能徹底解決內存的問題。   BitmapFactory.Options options = new BitmapFactory.Options();   options.inPurgeable = true; // bitmap can be purged to disk   options.inInputShareable = true;   Bitmap bm = BitmapFactory.decodeStream(getResources().openRawResource(   resid));   Drawable bd = new BitmapDrawable(getResources(), bm);   image_.setBackgroundDrawable(bd);           }