Comparing Bitmap images in Android

Question

Is there any way to check if bitmaps are the same? can someone help me out?

Answer 1

Bitmap class has method "sameAs" you can use that method to compare two bitmap

http://developer.android.com/reference/android/graphics/Bitmap.html#sameAs%28android.graphics.Bitmap%29

Answer 2

It should be something like this:

public boolean equals(Bitmap bitmap1, Bitmap bitmap2) {
    ByteBuffer buffer1 = ByteBuffer.allocate(bitmap1.getHeight() * bitmap1.getRowBytes());
    bitmap1.copyPixelsToBuffer(buffer1);

    ByteBuffer buffer2 = ByteBuffer.allocate(bitmap2.getHeight() * bitmap2.getRowBytes());
    bitmap2.copyPixelsToBuffer(buffer2);

    return Arrays.equals(buffer1.array(), buffer2.array());
}