Java Drawable.setAlpha方法代碼示例

import android.graphics.drawable.Drawable; //導入方法依賴的package包/類
/**
 * This view disables tapping on the day objects and on the endDate label. It also
 * colors them following the material design specification.
  */
private void disableDays() {
    double opacity = 0.26; //Following the material specification, disabled buttons have opacity 26%
    for (int i = 0; i < weekdaysSelection.length; i++) {
        LinearLayout day = getDayLayout(i);
        day.setOnClickListener(null);
        endDateTextView.setOnClickListener(null);
        endDateTextView.setAlpha( (float) (opacity * 255 /100));
        int colorBlack = ContextCompat.getColor(getBaseContext(), R.color.black);
        if (day.getBackground()== null) {
            Drawable bg = ContextCompat.getDrawable(getBaseContext(), R.drawable.circle_step);
            bg.setColorFilter(new PorterDuffColorFilter(colorBlack, PorterDuff.Mode.SRC_IN));
            bg.setAlpha((int) (opacity * 255));
            day.setBackground(bg);
        } else {
            day.getBackground().setColorFilter(new PorterDuffColorFilter(colorBlack, PorterDuff.Mode.SRC_IN));
            day.getBackground().setAlpha((int) (opacity * 255));
        }
    }
}
 

import android.graphics.drawable.Drawable; //導入方法依賴的package包/類
/**
 * Sets the color filter and/or the alpha transparency on a {@link MenuItem}'s icon.
 *
 * @param menuItem The {@link MenuItem} to theme.
 * @param color    The color to set for the color filter or {@code null} for no changes.
 * @param alpha    The alpha value (0...255) to set on the icon or {@code null} for no changes.
 */
public static void colorMenuItem(MenuItem menuItem, Integer color, Integer alpha) {
    if (color == null && alpha == null) {
        return; // nothing to do.
    }
    Drawable drawable = menuItem.getIcon();
    if (drawable != null) {
        // If we don't mutate the drawable, then all drawables with this id will have the ColorFilter
        drawable.mutate();
        if (color != null) {
            drawable.setColorFilter(color, PorterDuff.Mode.SRC_ATOP);
        }
        if (alpha != null) {
            drawable.setAlpha(alpha);
        }
    }
}
 

import android.graphics.drawable.Drawable; //導入方法依賴的package包/類
private static Drawable getPressedStateDrawable(Context context, @PressedMode.Mode int mode, @FloatRange(from = 0.0f, to = 1.0f) float alpha, @NonNull Drawable pressed) {
    //ColorDrawable is not supported on 4.4 because the size of the ColorDrawable can not be determined unless the View size is passed in
    if (isKitkat() && !(pressed instanceof ColorDrawable)) {
        return kitkatDrawable(context, pressed, mode, alpha);
    }
    switch (mode) {
        case PressedMode.ALPHA:
            pressed.setAlpha(convertAlphaToInt(alpha));
            break;
        case PressedMode.DARK:
            pressed.setColorFilter(alphaColor(Color.BLACK, convertAlphaToInt(alpha)), PorterDuff.Mode.SRC_ATOP);
            break;
        default:
            pressed.setAlpha(convertAlphaToInt(alpha));
    }
    return pressed;
}
 

import android.graphics.drawable.Drawable; //導入方法依賴的package包/類
public void setColors(int mainColor, int frameColor, int chargeColor) {
    if (mBattery != null) {
        try {
            Object drawable = getDrawable();
            final int[] colors = (int[]) XposedHelpers.getObjectField(drawable, "mColors");
            colors[colors.length - 1] = mainColor;
            if (Utils.isLineageOs()) {
                Drawable frameDrawable = (Drawable) XposedHelpers.getObjectField(drawable, "mFrameDrawable");
                frameDrawable.setAlpha(mFrameAlpha);
                frameDrawable.setTint(frameColor);
                Paint paint = (Paint) XposedHelpers.getObjectField(drawable, "mTextAndBoltPaint");
                paint.setColor(chargeColor);
            } else {
                final Paint framePaint = (Paint) XposedHelpers.getObjectField(drawable, "mFramePaint");
                framePaint.setColor(frameColor);
                framePaint.setAlpha(mFrameAlpha);
                XposedHelpers.setIntField(drawable, "mChargeColor", chargeColor);
            }
            XposedHelpers.setIntField(drawable, "mIconTint", mainColor);
        } catch (Throwable t) {
            XposedBridge.log(t);
        }
    }
}
 

import android.graphics.drawable.Drawable; //導入方法依賴的package包/類
@RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN_MR2)
    private void applyDim(Activity activity) {
        ViewGroup parent = (ViewGroup) activity.getWindow().getDecorView().getRootView();
        //activity跟布局
//        ViewGroup parent = (ViewGroup) parent1.getChildAt(0);
        Drawable dim = new ColorDrawable(mDimColor);
        dim.setBounds(0, 0, parent.getWidth(), parent.getHeight());
        dim.setAlpha((int) (255 * mDimValue));
        ViewGroupOverlay overlay = parent.getOverlay();
        overlay.add(dim);
    }
 

import android.graphics.drawable.Drawable; //導入方法依賴的package包/類
public ActionSheet(Context context) {
    super(context, android.R.style.Theme_Light_NoTitleBar);// 全屏
    this.mContext = context;
    initViews();
    getWindow().setGravity(Gravity.BOTTOM);
    Drawable drawable = new ColorDrawable();
    drawable.setAlpha(0);// 去除黑色背景
    getWindow().setBackgroundDrawable(drawable);
}
 

import android.graphics.drawable.Drawable; //導入方法依賴的package包/類
@Override
public void transform(Drawable drawable, WheelView.ItemState itemState) {
    float relativePosition = Math.abs(itemState.getRelativePosition());
    int alpha = (int) ((1f - Math.pow(relativePosition, 2.5f)) * 255f);

    //clamp to between 0 and 255
    if (alpha > 255) alpha = 255;
    else if (alpha < 0) alpha = 0;

    drawable.setAlpha(alpha);
}
 

import android.graphics.drawable.Drawable; //導入方法依賴的package包/類
public void displayRemoteProvisioningInProgressDialog() {
	remoteProvisioningInProgress = true;

	progress = ProgressDialog.show(this, null, null);
	Drawable d = new ColorDrawable(ContextCompat.getColor(this, R.color.colorE));
	d.setAlpha(200);
	progress.getWindow().setLayout(WindowManager.LayoutParams.MATCH_PARENT, WindowManager.LayoutParams.MATCH_PARENT);
	progress.getWindow().setBackgroundDrawable(d);
	progress.setContentView(R.layout.progress_dialog);
	progress.show();
}
 

import android.graphics.drawable.Drawable; //導入方法依賴的package包/類
public Dialog displayDialog(String text){
	Dialog dialog = new Dialog(this);
	dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
	Drawable d = new ColorDrawable(ContextCompat.getColor(this, R.color.colorC));
	d.setAlpha(200);
	dialog.setContentView(R.layout.dialog);
	dialog.getWindow().setLayout(WindowManager.LayoutParams.MATCH_PARENT, WindowManager.LayoutParams.MATCH_PARENT);
	dialog.getWindow().setBackgroundDrawable(d);

	TextView customText = (TextView) dialog.findViewById(R.id.customText);
	customText.setText(text);
	return dialog;
}
 

import android.graphics.drawable.Drawable; //導入方法依賴的package包/類
public QActionSheet(QActionSheet.Builder builder) {
    super(builder.context, android.R.style.Theme_Light_NoTitleBar);

    Drawable drawable = new ColorDrawable();
    drawable.setAlpha(0);
    getWindow().setBackgroundDrawable(drawable);

    this.items = builder.items;
    this.initialSelection = builder.initialSelection;
    this.title = builder.title;
    this.onItemSelectListener = builder.listener;

    initView();
    initItemViews();
}
 

import android.graphics.drawable.Drawable; //導入方法依賴的package包/類
@Nullable
public Drawable getIcon(final KeyboardIconsSet iconSet, final int alpha) {
    final OptionalAttributes attrs = mOptionalAttributes;
    final int disabledIconId = (attrs != null) ? attrs.mDisabledIconId : ICON_UNDEFINED;
    final int iconId = mEnabled ? getIconId() : disabledIconId;
    final Drawable icon = iconSet.getIconDrawable(iconId);
    if (icon != null) {
        icon.setAlpha(alpha);
    }
    return icon;
}
 

import android.graphics.drawable.Drawable; //導入方法依賴的package包/類
public static void applyWallpaperDim(Activity activity) {
    Drawable background = new ColorDrawable(Color.BLACK);
    int dim = SharedPrefUtils.getInt(activity, KEY_WALLPAPER_DIM);
    int alpha = Math.round((float) dim / MAX_WALLPAPER_DIM * 255);
    background.setAlpha(alpha);
    activity.getWindow().setBackgroundDrawable(background);
}
 

import android.graphics.drawable.Drawable; //導入方法依賴的package包/類
private static Drawable getUnableStateDrawable(Context context, @NonNull Drawable unable) {
    if (isKitkat() && !(unable instanceof ColorDrawable)) {
        return kitkatUnableDrawable(context, unable);
    }
    unable.setAlpha(convertAlphaToInt(0.5f));
    return unable;
}
 

import android.graphics.drawable.Drawable; //導入方法依賴的package包/類
@Override
protected void applyTransformation(float interpolatedTime, Transformation t) {
    mCurrentAlpha = mFromAlpha + ((mToAlpha - mFromAlpha) * interpolatedTime);
    if (FLAG_FLADE_FLOAT == (FLAG_FLADE_FLOAT & mFlag)) {
        Drawable drawable = getFadeDrawable();
        drawable.setAlpha((int) (255 * (1 - mCurrentAlpha)));
        invalidate();
    } else {
        mCurrentAlpha = mCurrentAlpha * mCurrentAlpha;
        setAlpha(mCurrentAlpha);
    }
}
 

import android.graphics.drawable.Drawable; //導入方法依賴的package包/類
@Override
public void themeChange(ThemeEnum themeEnum, int[] colors) {

    int[] cs2 = ColorUtils.get2ActionStatusBarColors(this);
    int actionC = cs2[0];
    int statusC = cs2[1];
    toolbar.setBackgroundColor(statusC);
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
        getWindow().setStatusBarColor(actionC);
    }

    ThemeEnum theme = appPreference.getTheme();
    int[] cs = ColorUtils.get10ThemeColors(this, theme);
    int vicBC = theme == ThemeEnum.WHITE ? Color.WHITE : cs[4];
    int mainTC = cs[5];
    int vicTC = cs[6];
    guide.setTextColor(mainTC);
    star.setTextColor(mainTC);
    share.setTextColor(mainTC);
    name.setTextColor(vicTC);
    version.setTextColor(mainTC);
    container.setBackgroundColor(vicBC);

    Drawable d;
    if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.LOLLIPOP) {
        d = getDrawable(R.drawable.ic_navigate_next);
        d.setTint(vicTC);
    } else {
        d = getResources().getDrawable(R.drawable.ic_navigate_next);
    }
    d.setBounds(0, 0, d.getIntrinsicWidth(), d.getIntrinsicHeight());
    d.setAlpha(150);
    guide.setCompoundDrawables(null, null, d, null);
    star.setCompoundDrawables(null, null, d, null);
    share.setCompoundDrawables(null, null, d, null);
}