[android-developers] Merge bitmaps
I want to merge and show two bitmaps few times per second ( I'm using
orientation sensor and need to display in ImageView two parts of one
big bitmap ).
Bitmap b = BitmapFactory.decodeFile( url );
Bitmap all = Bitmap.createBitmap( xScreen, yScreen,
Config.ARGB_ );
Canvas c = new Canvas( all );
ImageView imageView = ...;
public void drawBitmaps( float values[] )
{
...
c.save();
Bitmap b2 = Bitmap.createBitmap( b, 0, startY,
xScreen / 2, yScreen );
Bitmap b3 = Bitmap.createBitmap( b, startX, startY,
xScreen / 2, yScreen );
c.drawBitmap( b2, 0, 0, null );
c.drawBitmap( b3, startX, 0, null );
imageView.setImageBitmap( all );
c.restore();
}
I need to call drawBitmaps(...) few times per second, and operation
Canvas.drawBitmap(...) take a lot of time and it's useless. Do you
know any better idea how to merge two bitmaps faster?
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