Android How to - Get red, green, blue alpha bytes from Bitmap

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Question

We would like to know how to get red, green, blue alpha bytes from Bitmap.

Answer

// w ww .ja va2s  .c om
import android.graphics.Bitmap;
import android.graphics.Matrix;
public class Main {

    static int getRedBytes(final Bitmap.Config config) {
        switch (config) {
            case RGB_565:
                return 5;

            case ARGB_4444:
                return 4;

            default:
                return 8;
        }
    }

    static int getGreenBytes(final Bitmap.Config config) {
        switch (config) {
            case RGB_565:
                return 6;

            case ARGB_4444:
                return 4;

            default:
                return 8;
        }
    }

    static int getBlueBytes(final Bitmap.Config config) {
        switch (config) {
            case RGB_565:
                return 5;

            case ARGB_4444:
                return 4;

            default:
                return 8;
        }
    }

    static int getAlphaBytes(final Bitmap.Config config) {
        switch (config) {
            case RGB_565:
                return 0;

            case ARGB_4444:
                return 4;

            default:
                return 8;
        }
    }

}

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