android bmp与drawable转换

Android中Bitmap及Drawable转换

1.Drawable—>Bitmap Resources res=getResources(); Bitmap bmp=BitmapFactory.decodeResource(res, R.drawable.sample_0); 2.Bitmap---->Drawable Drawable drawable =new BitmapDrawable(bmp); 另外在网上搜了些，也不知到底谁是原创的，反正不是我 1、Drawable → Bitmap public static Bitmap drawableToBitmap(Drawable drawable) {                 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);         //canvas.setBitmap(bitmap);         drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());         drawable.draw(canvas);         return bitmap; } 2、从资源中获取Bitmap Resources res=getResources(); Bitmap bmp=BitmapFactory.decodeResource(res, R.drawable.pic); 3、Bitmap → byte[] private byte[] Bitmap2Bytes(Bitmap bm){     ByteArrayOutputStream baos = new ByteArrayOutputStream();     bm.compress(Bitmap.CompressFormat.PNG, 100, baos);     return baos.toByteArray();   } 4、 byte[] → Bitmap    private Bitmap Bytes2Bimap(byte[] b){                     if(b.length!=0){                             return BitmapFactory.decodeByteArray(b, 0, b.length);                     }                     else {                             return null;                     }           } 转自：http://hi.baidu.com/enjoysoup/blog/item/40a8da15a274ab70ca80c4b0.html