以编程方式增强ImageView的亮度

Syed Wajahat Ali 发表于 Dev

Syed Wajahat阿里

我有一个Android应用程序，其中使用以下代码提高了图像的亮度。但这很慢，所以没有人知道增加android中imageview图像亮度的快速方法。请记住，这是在提高图像视图亮度，而不是屏幕亮度

 public static Bitmap doBrightness(Bitmap src, int value) {
    //Log.e("Brightness", "Changing brightnhjh");

    int width = src.getWidth();
    int height = src.getHeight();
    Bitmap bmout = Bitmap.createBitmap(width, height, src.getConfig());
    int A, R, G, B;
    int pixel;
    for (int i = 0; i < width; i=i++) {
        for (int j = 0; j < height; j=j++) {
            pixel = src.getPixel(i, j);
            A = Color.alpha(pixel);
            R = Color.red(pixel);
            G = Color.green(pixel);
            B = Color.blue(pixel);
            R += value;
            if (R > 255) {
                R = 255;
            } else if (R < 0) {
                R = 0;
            }
            G += value;
            if (G > 255) {
                G = 255;
            } else if (G < 0) {
                G = 0;
            }
            B += value;
            if (B > 255) {
                B = 255;
            } else if (B < 0) {
                B = 0;
            }
            bmout.setPixel(i, j, Color.argb(A, R, G, B));
        }
    }
    return bmout;

}

这是imageview

imageview.setImageBitmap(doBrightness(image, 40));

Syed Wajahat阿里

我已经解决了这个问题，我使图像更亮，然后在imageview中显示了它。我使用的代码如下：

foto.setColorFilter(brightIt(100));//foto is my ImageView
//and below is the brightIt func
public static ColorMatrixColorFilter brightIt(int fb) {
ColorMatrix cmB = new ColorMatrix();
cmB.set(new float[] { 
    1, 0, 0, 0, fb,
    0, 1, 0, 0, fb,
    0, 0, 1, 0, fb,
    0, 0, 0, 1, 0   });

ColorMatrix colorMatrix = new ColorMatrix();
colorMatrix.set(cmB);
//Canvas c = new Canvas(b2);
//Paint paint = new Paint();
ColorMatrixColorFilter f = new ColorMatrixColorFilter(colorMatrix);
//paint.setColorFilter(f);   
return f;
}