Create a bitmap of specific size with a random color - Android Graphics

Android examples for Graphics:Bitmap Color

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Description

Create a bitmap of specific size with a random color

Demo Code


import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.support.annotation.ColorInt;
import java.util.Random;

public class Main{
    /**// w ww  .  j  a v a  2  s.  co m
     * Create a bitmap of specific size with a random color
     *
     * @param w - width
     * @param h - height
     * @return - bitmap of random(ish) color
     */
    public static Bitmap createTestBitmap(int w, int h) {
        return createTestBitmap(w, h, null);
    }
    /**
     * Create a bitmap of specific size with a specific color
     *
     * @param w - width
     * @param h - height
     * @param color - color integer (not resource id)
     * @return - bitmap of random(ish) color
     */
    public static Bitmap createTestBitmap(int w, int h,
            @ColorInt Integer color) {
        Bitmap bitmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(bitmap);

        if (color == null) {
            int colors[] = new int[] { Color.BLUE, Color.GREEN, Color.RED,
                    Color.YELLOW, Color.WHITE };
            Random rgen = new Random();
            color = colors[rgen.nextInt(colors.length - 1)];
        }

        canvas.drawColor(color);
        return bitmap;
    }
}

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