Example usage for android.graphics Color argb

Introduction

In this page you can find the example usage for android.graphics Color argb.

Prototype

@ColorInt
public static int argb(float alpha, float red, float green, float blue)

Source Link

Document

Return a color-int from alpha, red, green, blue float components in the range \([0..1]\).

Usage

From source file:Main.java

public static int getColor(String colorHex) {
    if (!colorHex.startsWith("#"))
        colorHex = "#" + colorHex;
    int a;//from   w  w w.  j  a  v  a 2  s . c  o  m
    int r;
    int g;
    int b;
    if (colorHex.length() == 7) {
        a = 0xFF;
        r = Integer.parseInt(colorHex.substring(1, 3), 16);
        g = Integer.parseInt(colorHex.substring(3, 5), 16);
        b = Integer.parseInt(colorHex.substring(5, 7), 16);
    } else if (colorHex.length() == 9) {
        a = Integer.parseInt(colorHex.substring(1, 3), 16);
        r = Integer.parseInt(colorHex.substring(3, 5), 16);
        g = Integer.parseInt(colorHex.substring(5, 7), 16);
        b = Integer.parseInt(colorHex.substring(7, 9), 16);
    } else
        return Color.BLACK;
    int c = Color.argb(a, r, g, b);
    return c;
}

From source file:Main.java

public static int setAlpha(int color, float newAlpha) {
    int intAlpha = (int) (newAlpha * 255);
    return Color.argb(intAlpha, Color.red(color), Color.green(color), Color.blue(color));
}

From source file:Main.java

public static void drawRuleOfThird(Canvas canvas, RectF bounds) {
    Paint p = new Paint();
    p.setStyle(Paint.Style.STROKE);
    p.setColor(Color.argb(128, 255, 255, 255));
    p.setStrokeWidth(2);/*from  w w w .ja v  a 2s .  c o m*/
    float stepX = bounds.width() / 3.0f;
    float stepY = bounds.height() / 3.0f;
    float x = bounds.left + stepX;
    float y = bounds.top + stepY;
    for (int i = 0; i < 2; i++) {
        canvas.drawLine(x, bounds.top, x, bounds.bottom, p);
        x += stepX;
    }
    for (int j = 0; j < 2; j++) {
        canvas.drawLine(bounds.left, y, bounds.right, y, p);
        y += stepY;
    }
}

From source file:Main.java

private static View createTranslucentStatusBarView(Activity activity, int alpha) {
    View statusBarView = new View(activity);
    LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
            getStatusBarHeight(activity));
    statusBarView.setLayoutParams(params);
    statusBarView.setBackgroundColor(Color.argb(alpha, 0, 0, 0));
    return statusBarView;
}

From source file:Main.java

/**
 * Retuns a darker color from a specified color by the factor.
 * @param color/*  w  w  w .  ja  v  a2 s .c o  m*/
 * @param factor
 * @return
 */
public static int darker(int color, float factor) {
    int a = Color.alpha(color);
    int r = Color.red(color);
    int g = Color.green(color);
    int b = Color.blue(color);

    return Color.argb(a, Math.max((int) (r * factor), 0), Math.max((int) (g * factor), 0),
            Math.max((int) (b * factor), 0));
}

From source file:Main.java

/**
 * Adjust the alpha of a color.//  w  ww. ja va2 s .  c  om
 * @param color the color [0x00000000, 0xffffffff]
 * @param factor the factor for the alpha [0,1]
 * @return the adjusted color
 */
public static int adjustAlpha(int color, float factor) {
    int alpha = Math.round(Color.alpha(color) * factor);
    int red = Color.red(color);
    int green = Color.green(color);
    int blue = Color.blue(color);
    return Color.argb(alpha, red, green, blue);
}

From source file:Main.java

/**
 * Concerts a String color (#ff882465) to an int color
 *
 * @throws NumberFormatException//from   ww w .j  av a2  s . c o  m
 */
public static int convertToColorInt(String a, String r, String g, String b, boolean useAlpha) {
    int alpha = useAlpha ? Integer.parseInt(a, 16) : 0xff;
    int red = Integer.parseInt(r, 16);
    int green = Integer.parseInt(g, 16);
    int blue = Integer.parseInt(b, 16);

    return Color.argb(useAlpha ? alpha : -1, red, green, blue);
}

From source file:Main.java

public static int scaleColor(int color, float factor, boolean scaleAlpha) {
    return Color.argb(scaleAlpha ? (Math.round(Color.alpha(color) * factor)) : Color.alpha(color),
            Math.round(Color.red(color) * factor), Math.round(Color.green(color) * factor),
            Math.round(Color.blue(color) * factor));
}

From source file:Main.java

public static int getDominantColor(Bitmap bitmap) {
    if (null == bitmap)
        return Color.TRANSPARENT;

    int redBucket = 0;
    int greenBucket = 0;
    int blueBucket = 0;
    int alphaBucket = 0;

    boolean hasAlpha = bitmap.hasAlpha();
    int pixelCount = bitmap.getWidth() * bitmap.getHeight();
    int[] pixels = new int[pixelCount];
    bitmap.getPixels(pixels, 0, bitmap.getWidth(), 0, 0, bitmap.getWidth(), bitmap.getHeight());

    for (int y = 0, h = bitmap.getHeight(); y < h; y++) {
        for (int x = 0, w = bitmap.getWidth(); x < w; x++) {
            int color = pixels[x + y * w]; // x + y * barHeight
            redBucket += (color >> 16) & 0xFF; // Color.red
            greenBucket += (color >> 8) & 0xFF; // Color.greed
            blueBucket += (color & 0xFF); // Color.blue
            if (hasAlpha)
                alphaBucket += (color >>> 24); // Color.alpha
        }//  ww  w  . j  a v a  2  s.  c o  m
    }

    return Color.argb((hasAlpha) ? (alphaBucket / pixelCount) : 255, redBucket / pixelCount,
            greenBucket / pixelCount, blueBucket / pixelCount);
}

From source file:Main.java

public static Bitmap handleImageOldPhoto(Bitmap bm) {
    int width = bm.getWidth();
    int height = bm.getHeight();
    int color;// w w  w.j  a v  a2  s. c om
    int r, g, b, a;
    Bitmap bmp = Bitmap.createBitmap(bm.getWidth(), bm.getHeight(), Bitmap.Config.ARGB_8888);
    int[] oldPx = new int[width * height];
    int[] newPx = new int[width * height];
    bm.getPixels(oldPx, 0, width, 0, 0, width, height);
    for (int i = 0; i < width * height; i++) {
        color = oldPx[i];
        r = Color.red(color);
        g = Color.green(color);
        b = Color.blue(color);
        a = Color.alpha(color);

        r = (int) (0.393 * r + 0.769 * g + 0.189 * b);
        g = (int) (0.349 * r + 0.686 * g + 0.168 * b);
        b = (int) (0.272 * r + 0.534 * g + 0.131 * b);
        if (r > 255) {
            r = 255;
        }
        if (g > 255) {
            g = 255;
        }
        if (b > 255) {
            b = 255;
        }
        newPx[i] = Color.argb(a, r, g, b);
    }
    bmp.setPixels(newPx, 0, width, 0, 0, width, height);
    return bmp;

}