Android Drawable、Bitmap、byte[]之間的轉換

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轉自http://blog.csdn.net/june5253/article/details/7826597

 

1、Bitmap-->Drawable

    Bitmap drawable2Bitmap(Drawable drawable) {          if (drawable instanceof BitmapDrawable) {              return ((BitmapDrawable) drawable).getBitmap();          } else if (drawable instanceof NinePatchDrawable) {              Bitmap bitmap = Bitmap                      .createBitmap(                              drawable.getIntrinsicWidth(),                              drawable.getIntrinsicHeight(),                              drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888                                      : Bitmap.Config.RGB_565);              Canvas canvas = new Canvas(bitmap);              drawable.setBounds(0, 0, drawable.getIntrinsicWidth(),                      drawable.getIntrinsicHeight());              drawable.draw(canvas);              return bitmap;          } else {              return null;          }      }

2、從資源中擷取的Drawable-->Bitmap

Bitmap bitmap=BitmapFactory.decodeResource(res,R.drawable.pic);

3、Bitmap-->Drawable

Drawable bitmap2Drawable(Bitmap bitmap){  new BitmapDrawable(bitmap);  }

4、Bitmap-->byte[]

byte[] Bitmap2Bytes(Bitmap bm) {          ByteArrayOutputStream baos = new ByteArrayOutputStream();          bm.compress(Bitmap.CompressFormat.PNG, 100, baos);          return baos.toByteArray();      }

5、byte[]-->Bitmap

Bitmap Bytes2Bimap(byte[] b) {          if (b.length != 0) {              return BitmapFactory.decodeByteArray(b, 0, b.length);          } else {              return null;          }      }

 

Android Drawable、Bitmap、byte[]之間的轉換