Android image types convert between code _android

The examples in this article describe the conversion implementation code between Android picture types. Share to everyone for your reference. Specifically as follows:

Android does some type of conversion when it comes to processing a picture resource, and now it's time to sort it out:

1, Drawable→bitmap

The Java code is as follows:

public static Bitmap Drawabletobitmap (drawable drawable) {Bitmap Bitmap = Bitmap. CreateBitmap (Drawable.get Intrinsicwidth (), 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; public static Bitmap Drawabletobitmap (drawable drawable) {Bitmap Bitmap = Bitmap. CreateBitmap (drawable.g Etintrinsicwidth (), 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, from the resources to obtain bitmap

The Java code is as follows:

Resources res=getresources (); 
Bitmap Bmp=bitmapfactory.decoderesource (res, r.drawable.pic); 
Resources res=getresources (); 
Bitmap Bmp=bitmapfactory.decoderesource (res, r.drawable.pic); 

3, bitmap→byte[]

The Java code is as follows:

Private byte[] Bitmap2bytes (Bitmap BM) { 
 Bytearrayoutputstream BAOs = new Bytearrayoutputstream (); 
 Bm.compress (Bitmap.CompressFormat.PNG, BAOs); 
 return Baos.tobytearray (); 
} 
Private byte[] Bitmap2bytes (Bitmap BM) { 
 Bytearrayoutputstream BAOs = new Bytearrayoutputstream (); 
 Bm.compress (Bitmap.CompressFormat.PNG, BAOs); 
 return Baos.tobytearray (); 
} 

4, Byte[]→bitmap

The Java code is as follows:

Private Bitmap Bytes2bimap (byte[] b) { 
  if (b.length!=0) {return 
  Bitmapfactory.decodebytearray (b, 0, b.length); 
  else {return 
  null; 
  } 
} Private Bitmap Bytes2bimap (byte[] b) { 
  if (b.length!=0) {return 
  Bitmapfactory.decodebytearray (b, 0, B.length) ; 
  } 
  else {return 
  null; 
  } 
}

These are some of the transformations I have encountered in practice, and I will not have to look everywhere for similar problems.

I hope this article will help you with your Android program.