Android图片内存优化的几点心得

      1 BitmapFactory.Options options = new BitmapFactory.Options();
      2 options.inSampleSize = 2;
      3 Bitmap img = BitmapFactory.decodeFile("/sdcard/1.png", options);
  
 

      1 BitmapFactory.Options options = new BitmapFactory.Options();
      2 options.inPreferredConfig = Bitmap.Config.ARGB_4444;
      3 Bitmap img = BitmapFactory.decodeFile("/sdcard/1.png", options);
  
 

      Matrix matrix = new Matrix();
      float newWidth = 200;//图片放大后的宽度
      float newHeight = 300;//图片放大后的长度
      matrix.postScale(newWidth / img.getWidth(), newHeight/ img.getHeight());
      Bitmap img1 = Bitmap.createBitmap(img, 0, 0, img.getWidth(), img.getHeight(), matrix, true);//得到放大的图片
      img2 = img1.copy(Bitmap.Config.ARGB_4444, false);//得到ARGB_4444颜色模式的图片
      img = null;
      img1 = null;
  
 

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原文链接：panda1234lee.blog.csdn.net/article/details/8677802