android中将两张图片合并为一张图片

private Bitmap mergeBitmap(Bitmap firstBitmap, Bitmap secondBitmap) {

Bitmap bitmap = Bitmap.createBitmap(firstBitmap.getWidth(), firstBitmap.getHeight(),

firstBitmap.getConfig());

Canvas canvas = new Canvas(bitmap);

canvas.drawBitmap(firstBitmap, new Matrix(), null);

canvas.drawBitmap(secondBitmap, 0, 0, null);

return bitmap;

}