Example usage for android.graphics Color alpha

Introduction

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

Prototype

@IntRange(from = 0, to = 255)
public static int alpha(int color) 

Source Link

Document

Return the alpha component of a color int.

Usage

From source file:de.mrapp.android.util.BitmapUtil.java

/**
 * Clips the long edge of a bitmap, if its width and height are not equal, in order to transform
 * it into a square. Additionally, the bitmap is resized to a specific size and a border will be
 * added./*from   w  w w  .  ja  v  a 2 s .c om*/
 *
 * @param bitmap
 *         The bitmap, which should be clipped, as an instance of the class {@link Bitmap}. The
 *         bitmap may not be null
 * @param size
 *         The size, the bitmap should be resized to, as an {@link Integer} value in pixels. The
 *         size must be at least 1
 * @param borderWidth
 *         The width of the border as an {@link Integer} value in pixels. The width must be at
 *         least 0
 * @param borderColor
 *         The color of the border as an {@link Integer} value
 * @return The clipped bitmap as an instance of the class {@link Bitmap}
 */
public static Bitmap clipSquare(@NonNull final Bitmap bitmap, final int size, final int borderWidth,
        @ColorInt final int borderColor) {
    ensureAtLeast(borderWidth, 0, "The border width must be at least 0");
    Bitmap clippedBitmap = clipSquare(bitmap, size);
    Bitmap result = Bitmap.createBitmap(clippedBitmap.getWidth(), clippedBitmap.getHeight(),
            Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(result);
    float offset = borderWidth / 2.0f;
    Rect src = new Rect(0, 0, clippedBitmap.getWidth(), clippedBitmap.getHeight());
    RectF dst = new RectF(offset, offset, result.getWidth() - offset, result.getHeight() - offset);
    canvas.drawBitmap(clippedBitmap, src, dst, null);

    if (borderWidth > 0 && Color.alpha(borderColor) != 0) {
        Paint paint = new Paint();
        paint.setFilterBitmap(false);
        paint.setStyle(Paint.Style.STROKE);
        paint.setStrokeWidth(borderWidth);
        paint.setColor(borderColor);
        offset = borderWidth / 2.0f;
        RectF bounds = new RectF(offset, offset, result.getWidth() - offset, result.getWidth() - offset);
        canvas.drawRect(bounds, paint);
    }

    return result;
}

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From source file:com.lamcreations.scaffold.common.utils.CollapsingTextHelper.java

private static int blendColors(int color1, int color2, float ratio) {
    float inverseRatio = 1.0F - ratio;
    float a = (float) Color.alpha(color1) * inverseRatio + (float) Color.alpha(color2) * ratio;
    float r = (float) Color.red(color1) * inverseRatio + (float) Color.red(color2) * ratio;
    float g = (float) Color.green(color1) * inverseRatio + (float) Color.green(color2) * ratio;
    float b = (float) Color.blue(color1) * inverseRatio + (float) Color.blue(color2) * ratio;
    return Color.argb((int) a, (int) r, (int) g, (int) b);
}

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From source file:com.apptentive.android.sdk.util.Util.java

public static int brighter(int color, float factor) {
    int red = (int) ((Color.red(color) * (1 - factor) / 255 + factor) * 255);
    int green = (int) ((Color.green(color) * (1 - factor) / 255 + factor) * 255);
    int blue = (int) ((Color.blue(color) * (1 - factor) / 255 + factor) * 255);
    return Color.argb(Color.alpha(color), red, green, blue);
}

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From source file:com.apptentive.android.sdk.util.Util.java

public static int dimmer(int color, float factor) {
    int alpha = (int) (Color.alpha(color) * factor);
    return Color.argb(alpha, Color.red(color), Color.green(color), Color.blue(color));
}

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From source file:lollipop.iconics.IconicsDrawable.java

/**
 * Set contour color for the.//from  w  w  w  .  j a v a 2s. c  om
 *
 * @param contourColor
 * @return The current IconExtDrawable for chaining.
 */
public IconicsDrawable contourColor(@ColorInt int contourColor) {
    int red = Color.red(contourColor);
    int green = Color.green(contourColor);
    int blue = Color.blue(contourColor);
    mContourPaint.setColor(Color.rgb(red, green, blue));
    mContourPaint.setAlpha(Color.alpha(contourColor));
    invalidateSelf();
    return this;
}

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From source file:com.bilibili.magicasakura.utils.GradientDrawableInflateImpl.java

int getAlphaColor(int baseColor, float alpha) {
    return alpha != 1.0f ? ColorUtils.setAlphaComponent(baseColor, Math.round(Color.alpha(baseColor) * alpha))
            : baseColor;// w ww  .  j  ava  2s  .  co  m
}

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From source file:com.next.PagerSlidingTabStrip.java

private void updateTextViewColor(View tabView, int color) {

    Color.argb(Color.alpha(color), Color.red(color), Color.green(color), Color.blue(color));

    //      http://stackoverflow.com/questions/4602902/how-to-set-the-text-color-of-textview-in-code
    float alpha = 1.0f;
    int alphaInteger = 255;
    if (color == tabTextColorNormal) {
        alpha = 0.5f;//from  w w  w.ja va2s  . c  o  m
        alphaInteger *= alpha;
    }
    if (tabView instanceof TextView) {
        ((TextView) tabView).setTextColor(color);
        //            ((TextView) tabView).setAlpha(alpha);
    } else if (tabView instanceof FrameLayout && ((FrameLayout) tabView).getChildAt(0) instanceof TextView) {
        ((TextView) ((FrameLayout) tabView).getChildAt(0)).setTextColor(color);
        //            ((TextView) ((FrameLayout) tabView).getChildAt(0)).setAlpha(alpha);
    }
}

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From source file:net.margaritov.preference.colorpicker.ColorPickerDialog.java

private int blendColors(int from, int to, float ratio) {
    final float inverseRatio = 1f - ratio;

    final float a = Color.alpha(to) * ratio + Color.alpha(from) * inverseRatio;
    final float r = Color.red(to) * ratio + Color.red(from) * inverseRatio;
    final float g = Color.green(to) * ratio + Color.green(from) * inverseRatio;
    final float b = Color.blue(to) * ratio + Color.blue(from) * inverseRatio;

    return Color.argb((int) a, (int) r, (int) g, (int) b);
}

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From source file:com.google.android.apps.muzei.settings.SettingsChooseSourceFragment.java

public void updateSources() {
    mSelectedSource = null;//from  w  ww . j  av a 2  s .c om
    Intent queryIntent = new Intent(ACTION_MUZEI_ART_SOURCE);
    PackageManager pm = getActivity().getPackageManager();
    mSources.clear();
    List<ResolveInfo> resolveInfos = pm.queryIntentServices(queryIntent, PackageManager.GET_META_DATA);

    for (ResolveInfo ri : resolveInfos) {
        Source source = new Source();
        source.label = ri.loadLabel(pm).toString();
        source.icon = new BitmapDrawable(getResources(), generateSourceImage(ri.loadIcon(pm)));
        source.componentName = new ComponentName(ri.serviceInfo.packageName, ri.serviceInfo.name);
        if (ri.serviceInfo.descriptionRes != 0) {
            try {
                Context packageContext = getActivity()
                        .createPackageContext(source.componentName.getPackageName(), 0);
                Resources packageRes = packageContext.getResources();
                source.description = packageRes.getString(ri.serviceInfo.descriptionRes);
            } catch (PackageManager.NameNotFoundException e) {
                Log.e(TAG, "Can't read package resources for source " + source.componentName);
            }
        }
        Bundle metaData = ri.serviceInfo.metaData;
        source.color = Color.WHITE;
        if (metaData != null) {
            String settingsActivity = metaData.getString("settingsActivity");
            if (!TextUtils.isEmpty(settingsActivity)) {
                source.settingsActivity = ComponentName
                        .unflattenFromString(ri.serviceInfo.packageName + "/" + settingsActivity);
            }

            String setupActivity = metaData.getString("setupActivity");
            if (!TextUtils.isEmpty(setupActivity)) {
                source.setupActivity = ComponentName
                        .unflattenFromString(ri.serviceInfo.packageName + "/" + setupActivity);
            }

            source.color = metaData.getInt("color", source.color);

            try {
                float[] hsv = new float[3];
                Color.colorToHSV(source.color, hsv);
                boolean adjust = false;
                if (hsv[2] < 0.8f) {
                    hsv[2] = 0.8f;
                    adjust = true;
                }
                if (hsv[1] > 0.4f) {
                    hsv[1] = 0.4f;
                    adjust = true;
                }
                if (adjust) {
                    source.color = Color.HSVToColor(hsv);
                }
                if (Color.alpha(source.color) != 255) {
                    source.color = Color.argb(255, Color.red(source.color), Color.green(source.color),
                            Color.blue(source.color));
                }
            } catch (IllegalArgumentException ignored) {
            }
        }

        mSources.add(source);
    }

    final String appPackage = getActivity().getPackageName();
    Collections.sort(mSources, new Comparator<Source>() {
        @Override
        public int compare(Source s1, Source s2) {
            String pn1 = s1.componentName.getPackageName();
            String pn2 = s2.componentName.getPackageName();
            if (!pn1.equals(pn2)) {
                if (appPackage.equals(pn1)) {
                    return -1;
                } else if (appPackage.equals(pn2)) {
                    return 1;
                }
            }
            return s1.label.compareTo(s2.label);
        }
    });

    redrawSources();
}

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From source file:android.support.graphics.drawable.VectorDrawableCompat.java

private static int applyAlpha(int color, float alpha) {
    int alphaBytes = Color.alpha(color);
    color &= 0x00FFFFFF;/*from   w  ww  .  j av a 2s  .  c  o  m*/
    color |= ((int) (alphaBytes * alpha)) << 24;
    return color;
}

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