List of usage examples for android.graphics Color alpha
@IntRange(from = 0, to = 255) public static int alpha(int color)
From source file:Main.java
/** * Creates an approximated cubic gradient using a multi-stop linear gradient. See * <a href="https://plus.google.com/+RomanNurik/posts/2QvHVFWrHZf">this post</a> for more * details./* ww w . ja va 2s . c o m*/ */ public static Drawable makeCubicGradientScrimDrawable(int baseColor, int numStops, int gravity) { // Generate a cache key by hashing together the inputs, based on the method described in the Effective Java book int cacheKeyHash = baseColor; cacheKeyHash = 31 * cacheKeyHash + numStops; cacheKeyHash = 31 * cacheKeyHash + gravity; Drawable cachedGradient = cubicGradientScrimCache.get(cacheKeyHash); if (cachedGradient != null) { return cachedGradient; } numStops = Math.max(numStops, 2); PaintDrawable paintDrawable = new PaintDrawable(); paintDrawable.setShape(new RectShape()); final int[] stopColors = new int[numStops]; int red = Color.red(baseColor); int green = Color.green(baseColor); int blue = Color.blue(baseColor); int alpha = Color.alpha(baseColor); for (int i = 0; i < numStops; i++) { float x = i * 1f / (numStops - 1); float opacity = constrain(0, 1, (float) Math.pow(x, 3)); stopColors[i] = Color.argb((int) (alpha * opacity), red, green, blue); } final float x0, x1, y0, y1; switch (gravity & Gravity.HORIZONTAL_GRAVITY_MASK) { case Gravity.LEFT: x0 = 1; x1 = 0; break; case Gravity.RIGHT: x0 = 0; x1 = 1; break; default: x0 = 0; x1 = 0; break; } switch (gravity & Gravity.VERTICAL_GRAVITY_MASK) { case Gravity.TOP: y0 = 1; y1 = 0; break; case Gravity.BOTTOM: y0 = 0; y1 = 1; break; default: y0 = 0; y1 = 0; break; } paintDrawable.setShaderFactory(new ShapeDrawable.ShaderFactory() { @Override public Shader resize(int width, int height) { return new LinearGradient(width * x0, height * y0, width * x1, height * y1, stopColors, null, Shader.TileMode.CLAMP); } }); cubicGradientScrimCache.put(cacheKeyHash, paintDrawable); return paintDrawable; }
From source file:babbq.com.searchplace.util.ColorUtils.java
/** * Blend {@code color1} and {@code color2} using the given ratio. * * @param ratio of which to blend. 0.0 will return {@code color1}, 0.5 will give an even blend, * 1.0 will return {@code color2}. *//* w ww. java 2s . c o m*/ public static @ColorInt int blendColors(@ColorInt int color1, @ColorInt int color2, @FloatRange(from = 0f, to = 1f) float ratio) { final float inverseRatio = 1f - ratio; float a = (Color.alpha(color1) * inverseRatio) + (Color.alpha(color2) * ratio); float r = (Color.red(color1) * inverseRatio) + (Color.red(color2) * ratio); float g = (Color.green(color1) * inverseRatio) + (Color.green(color2) * ratio); float b = (Color.blue(color1) * inverseRatio) + (Color.blue(color2) * ratio); return Color.argb((int) a, (int) r, (int) g, (int) b); }
From source file:com.yoloo.android.util.ScrimUtil.java
/** * Creates an approximated cubic gradient using a multi-stop linear gradient. See * <a href="https://plus.google.com/+RomanNurik/posts/2QvHVFWrHZf">this post</a> for more * details./*from w w w. j ava 2 s. c o m*/ */ public static Drawable makeCubicGradientScrimDrawable(int baseColor, int numStops, int gravity) { // Generate a cache key by hashing together the inputs, // based on the method described in the Effective Java book int cacheKeyHash = baseColor; cacheKeyHash = 31 * cacheKeyHash + numStops; cacheKeyHash = 31 * cacheKeyHash + gravity; Drawable cachedGradient = cubicGradientScrimCache.get(cacheKeyHash); if (cachedGradient != null) { return cachedGradient; } numStops = Math.max(numStops, 2); PaintDrawable paintDrawable = new PaintDrawable(); paintDrawable.setShape(new RectShape()); final int[] stopColors = new int[numStops]; final int red = Color.red(baseColor); final int green = Color.green(baseColor); final int blue = Color.blue(baseColor); final int alpha = Color.alpha(baseColor); for (int i = 0; i < numStops; i++) { float x = i * 1f / (numStops - 1); float opacity = MathUtils.constrain(0, 1, (float) Math.pow(x, 3)); stopColors[i] = Color.argb((int) (alpha * opacity), red, green, blue); } final float x0, x1, y0, y1; switch (gravity & Gravity.HORIZONTAL_GRAVITY_MASK) { case Gravity.START: x0 = 1; x1 = 0; break; case Gravity.END: x0 = 0; x1 = 1; break; default: x0 = 0; x1 = 0; break; } switch (gravity & Gravity.VERTICAL_GRAVITY_MASK) { case Gravity.TOP: y0 = 1; y1 = 0; break; case Gravity.BOTTOM: y0 = 0; y1 = 1; break; default: y0 = 0; y1 = 0; break; } paintDrawable.setShaderFactory(new ShapeDrawable.ShaderFactory() { @Override public Shader resize(int width, int height) { return new LinearGradient(width * x0, height * y0, width * x1, height * y1, stopColors, null, Shader.TileMode.CLAMP); } }); cubicGradientScrimCache.put(cacheKeyHash, paintDrawable); return paintDrawable; }
From source file:app.witness.com.myapplication.plaint.ColorUtils.java
/** * Blend {@code color1} and {@code color2} using the given ratio. * * @param ratio of which to blend. 0.0 will return {@code color1}, 0.5 will give an even blend, * 1.0 will return {@code color2}. *///from w ww. j a v a2s . c o m public static @CheckResult @ColorInt int blendColors(@ColorInt int color1, @ColorInt int color2, @FloatRange(from = 0f, to = 1f) float ratio) { final float inverseRatio = 1f - ratio; float a = (Color.alpha(color1) * inverseRatio) + (Color.alpha(color2) * ratio); float r = (Color.red(color1) * inverseRatio) + (Color.red(color2) * ratio); float g = (Color.green(color1) * inverseRatio) + (Color.green(color2) * ratio); float b = (Color.blue(color1) * inverseRatio) + (Color.blue(color2) * ratio); return Color.argb((int) a, (int) r, (int) g, (int) b); }
From source file:com.jaredrummler.materialspinner.MaterialSpinner.java
/** * Darkens a color by a given factor.// w ww .j av a 2 s.c om * * @param color * the color to darken * @param factor * The factor to darken the color. * @return darker version of specified color. */ @ColorInt private static int darker(@ColorInt int color, @FloatRange(from = 0.0, to = 1.0) float factor) { return Color.argb(Color.alpha(color), Math.max((int) (Color.red(color) * factor), 0), Math.max((int) (Color.green(color) * factor), 0), Math.max((int) (Color.blue(color) * factor), 0)); }
From source file:jahirfiquitiva.iconshowcase.utilities.color.ColorUtils.java
/** * Changes opacity of {@code color} to the specified {@code factor} * * @param factor which will change the opacity of the color *//*from w w w .j a va 2 s . c om*/ public static int adjustAlpha(@ColorInt int color, @FloatRange(from = 0.0, to = 1.0) float factor) { float a = Color.alpha(color) * factor; float r = Color.red(color); float g = Color.green(color); float b = Color.blue(color); return Color.argb((int) a, (int) r, (int) g, (int) b); }
From source file:org.adw.library.widgets.discreteseekbar.internal.drawable.AlmostRippleDrawable.java
private static int getModulatedAlphaColor(int alphaValue, int originalColor) { int alpha = Color.alpha(originalColor); int scale = alphaValue + (alphaValue >> 7); alpha = alpha * scale >> 8;/*from w w w. j av a 2 s . c o m*/ return Color.argb(alpha, Color.red(originalColor), Color.green(originalColor), Color.blue(originalColor)); }
From source file:Main.java
private static boolean isTransparent(int color, int alphaThreshold) { return Color.alpha(color) <= alphaThreshold; }
From source file:org.chromium.chrome.browser.widget.ClipDrawableProgressBar.java
/** * Constructor for inflating from XML./*www . j a v a 2s. com*/ */ public ClipDrawableProgressBar(Context context, AttributeSet attrs) { super(context, attrs); mDesiredVisibility = getVisibility(); assert attrs != null; TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.ClipDrawableProgressBar, 0, 0); int foregroundColor = a.getColor(R.styleable.ClipDrawableProgressBar_progressBarColor, Color.TRANSPARENT); mBackgroundColor = a.getColor(R.styleable.ClipDrawableProgressBar_backgroundColor, Color.TRANSPARENT); assert foregroundColor != Color.TRANSPARENT; assert Color.alpha( foregroundColor) == 255 : "Currently ClipDrawableProgressBar only supports opaque progress bar color."; a.recycle(); mForegroundDrawable = new ColorDrawable(foregroundColor); setImageDrawable(new ClipDrawable(mForegroundDrawable, Gravity.START, ClipDrawable.HORIZONTAL)); setBackgroundColor(mBackgroundColor); }
From source file:com.pranavpandey.smallapp.theme.DynamicTheme.java
/** * Calculate accent based on a given color for dynamic theme generation. * Still in beta so, sometimes may be inaccurate colors. * * @param color whose accent to be calculated. * * @return Accent based on given color.//from ww w .ja v a 2 s . c o m */ public static @ColorInt int getAccentColor(@ColorInt int color) { int finalColor; int a = Color.alpha(color); int r = Color.red(color); int g = Color.green(color); int b = Color.blue(color); double Y = ((r * 299) + (g * 587) + (b * 114)) / 1000; int rc = b ^ 0x55; int gc = g & 0xFA; int bc = r ^ 0x55; finalColor = Color.argb(a, rc, gc, bc); int r1 = Color.red(finalColor); int g1 = Color.green(finalColor); int b1 = Color.blue(finalColor); double YC = ((r1 * 299) + (g1 * 587) + (b1 * 114)) / 1000; int CD = (Math.max(r, r1) - Math.min(r, r1)) + (Math.max(g, g1) - Math.min(g, g1)) + (Math.max(b, b1) - Math.min(b, b1)); if ((Y - YC <= 50) && CD <= 200) { rc = b ^ 0xFA; gc = g & 0x55; bc = r ^ 0x55; } finalColor = Color.argb(a, rc, gc, bc); return finalColor; }