How do I convert a Bitmap with black pixels to another color in Android?

I've got a Bitmap with some transparent pixels and rest is mainly black (some black pixels possibly have a few sem-transparent pixels).

I need to re-use these bitmaps and want to be able to essentially create a Mask out of this bitmap at runtime and then try and blend with a block of another color (like Red, green etc) so that the end result is the same image but with red color (and those pixels which were semi-transparent black pixels turn into semi-transparent red pixels).

I've tried all sorts of color filters and xfermodes but have not been able to figure out. Please help!

If you doesn't need high speed, you can use simple solution by manually blend pixels.

final Bitmap bmp = /* there your bitmap */;

int w = bmp.getWidth();
int h = bmp.getHeight();

for (int x = 0; x < w; x++) {
  for (int y = 0; y < h; y++) {
    int color = bmp.getPixel(x, y);

    // Shift your alpha component value to the red component's.
    color = (color << 24) & 0xFF000000;

    bmp.setPixel(x, y, color);
  }
}

If you need more effective processing, you must use (at least) getPixels method or, more preferable, native processing.