BitmapFactory 's decodeByteArray and decodeStream returns null

I am trying to decode ARGB byte array into Bitmap to display it as an ImageView. I tried using BitmapFactory's decodeByteArray() and decodeStream() but both way gives null as Bitmap.

But when I create bitmap using createBitmap() and setPixels() it works perfect. Here is the working code.

data is the byte array of size imageWidth*imageHeight*4

int[] pixels=new int[imageWidth*imageHeight]; 
int i=0,j=0;
while (i<imageWidth*imageHeight*4) {         
    pixels[j]= bytesToInt(data[i], data[i+1], data[i+2],data[i+3]);
    i += 4;
    j++;
}
Bitmap bitmap=Bitmap. createBitmap( imageWidth,imageHeight,Bitmap.Config .ARGB_8888)        
bmpf.setPixels(pixels, 0, imageWidth , 0, 0, imageWidth, imageHeight);
   //---------------------- definition of bytesToInt()
int bytesToInt(byte b1,byte b2,byte b3,byte b4开发者_运维技巧)
{
    return (((b1& 0xff)<<24)+((b2 & 0xff)<<16)+((b3&0xff)<<8)+(b4&0xff));
}

But I need to achieve this using decodeByteArray() or decodeStream() because for the later way I need to create integer array for setPixels() from the byte array , which is inefficient. What i am trying to implement is a video player , there fore it need to display around 15 frames/images per second.

Hopes some one can help me in this. Thanks in advance

Video plater plays video streams, i.e. a stream of video frames. Bitmap.decodeStream expects a stream of image bytes, i.e. a stream of bytes in JPEG or PNG format.

Is your stream of bytes in correct format, i.e. jpeg or png?