Android: Transform a bitmap into an input stream

How do you transform a Bitmap into an InputStream?

I would like to use this InputStream as input to the ETC1Util.loadTexture() function.

Solution 1:

This might work

ByteArrayOutputStream bos = new ByteArrayOutputStream(); 
bitmap.compress(CompressFormat.PNG, 0 /*ignored for PNG*/, bos); 
byte[] bitmapdata = bos.toByteArray();
ByteArrayInputStream bs = new ByteArrayInputStream(bitmapdata);

Solution 2:

This is my way:

// Your Bitmap.
Bitmap bitmap = XXX;  

int byteSize = bitmap.getRowBytes() * bitmap.getHeight();
ByteBuffer byteBuffer = ByteBuffer.allocate(byteSize);
bitmap.copyPixelsToBuffer(byteBuffer);  

// Get the byteArray.
byte[] byteArray = byteBuffer.array();

// Get the ByteArrayInputStream.
ByteArrayInputStream bs = new ByteArrayInputStream(byteArray);