Java Code Examples for android.view.ViewGroup#setBackground()

/**
 * 初始化提示的布局
 */
private void initLayout() {

    mMainLayout = (ViewGroup) LayoutInflater.from(getContext()).inflate(R.layout.widget_hint_layout, this, false);

    mImageView = mMainLayout.findViewById(R.id.iv_hint_icon);
    mTextView = mMainLayout.findViewById(R.id.iv_hint_text);

    if (mMainLayout.getBackground() == null) {
        // 默认使用 windowBackground 作为背景
        TypedArray ta = getContext().obtainStyledAttributes(new int[]{android.R.attr.windowBackground});
        mMainLayout.setBackground(ta.getDrawable(0));
        ta.recycle();
    }

    addView(mMainLayout);
}
 

private void addMenuItem(ViewGroup menu, String text, int menuIndex) {
    int[] colors = {android.R.color.holo_red_light,
            android.R.color.holo_green_light,
            android.R.color.darker_gray,
            android.R.color.holo_orange_light,
            android.R.color.holo_blue_light};
    Context context = menu.getContext();
    ViewGroup item = (ViewGroup) LayoutInflater.from(context).inflate(R.layout.menu_item, menu, false);
    ((TextView) item.findViewById(R.id.item_text)).setText(text);
    CircularSplashView ic = (CircularSplashView) item.findViewById(R.id.circle);
    ic.setSplash(getBitmap(context));
    ic.setSplashColor(context.getResources().getColor(colors[new Random().nextInt(colors.length)]));
    item.setOnClickListener(getMenuItemCLick(menuIndex, context.getResources().getColor(colors[new Random().nextInt(colors.length)])));
    int padding = (int) context.getResources().getDimension(R.dimen.menu_item_height_padding);
    menu.addView(item, new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, (int) context.getResources().getDimension(R.dimen.menu_item_height) + padding));
    item.setPadding(0, 0, 0, padding);
    item.setBackground(context.getResources().getDrawable(R.drawable.menu_btn, null));
}
 

@Override
protected void onFinishInflate() {
    super.onFinishInflate();

    mTextAndBackground = (ViewGroup) findViewById(R.id.text_and_background);
    ColorDrawable colorBackground = (ColorDrawable) mTextAndBackground.getBackground();
    mBackgroundColor = colorBackground.getColor();
    RippleDrawable rippleBackground = new RippleDrawable(ColorStateList.valueOf(
            ThemeUtils.getAttrColor(getContext(), android.R.attr.colorControlHighlight)),
            colorBackground, null);
    mTextAndBackground.setBackground(rippleBackground);
    mTitleView = (TextView) mTextAndBackground.findViewById(R.id.title);
    mTextView = (TextView) mTextAndBackground.findViewById(R.id.text);
}
 

private void initializeMenuline(final ViewGroup item) {


        item.setBackgroundColor(mItemBGColor);
        if (mStyle.isRoundedTabs()) {
            item.setBackground(mStyle.getBgDrawableFor(item, mItemBGColor));
        }
        LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams((int)mMain.getResources().getDimension(R.dimen.action_menu_width), ViewGroup.LayoutParams.WRAP_CONTENT);
        lp.setMargins(12,13,12,13);

        item.setLayoutParams(lp);
        mShortcutActionsList.addView(item);
        if (mAnimationDuration>0) {

            if (mShortcutActionsList.getChildCount() > mOldNum) {
                item.setVisibility(View.GONE);
            }
            item.setScaleY(.1f);
            item.animate()
                    .scaleY(1f)
                    .setDuration(mAnimationDuration)
                    .setStartDelay(mShortcutActionsList.getChildCount() * 10 + 10)
                    .withStartAction(new Runnable() {
                        @Override
                        public void run() {
                            item.setVisibility(View.VISIBLE);
                        }
                    });
        }
    }
 

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    addPreferencesFromResource(R.xml.preferences);
    ViewGroup view = (ViewGroup)getWindow().getDecorView();
    removeBackgroundRecursively(view);
    view.setBackground(getResources().getDrawable(R.drawable.settings_background));
}
 

public static void recycleViewGroupAndChildViews(ViewGroup viewGroup, boolean recycleBitmap) {
    for (int i = 0; i < viewGroup.getChildCount(); i++) {

        View child = viewGroup.getChildAt(i);

        if (child instanceof WebView) {
            WebView webView = (WebView) child;
            webView.loadUrl("about:blank");
            webView.stopLoading();
            continue;
        }

        if (child instanceof ViewGroup) {
            recycleViewGroupAndChildViews((ViewGroup) child, true);
            continue;
        }

        if (child instanceof ImageView) {
            ImageView iv = (ImageView) child;
            Drawable drawable = iv.getDrawable();
            if (drawable instanceof BitmapDrawable) {
                BitmapDrawable bitmapDrawable = (BitmapDrawable) drawable;
                Bitmap bitmap = bitmapDrawable.getBitmap();
                if (recycleBitmap && bitmap != null) {
                    bitmap.recycle();
                }
            }
            iv.setImageBitmap(null);
            iv.setBackground(null);
            continue;
        }

        child.setBackground(null);

    }

    viewGroup.setBackground(null);
}
 

public static void recycleViewGroupAndChildViews(ViewGroup viewGroup, boolean recycleBitmap) {
    for (int i = 0; i < viewGroup.getChildCount(); i++) {

        View child = viewGroup.getChildAt(i);

        if (child instanceof WebView) {
            WebView webView = (WebView) child;
            webView.loadUrl("about:blank");
            webView.stopLoading();
            continue;
        }

        if (child instanceof ViewGroup) {
            recycleViewGroupAndChildViews((ViewGroup) child, true);
            continue;
        }

        if (child instanceof ImageView) {
            ImageView iv = (ImageView) child;
            Drawable drawable = iv.getDrawable();
            if (drawable instanceof BitmapDrawable) {
                BitmapDrawable bitmapDrawable = (BitmapDrawable) drawable;
                Bitmap bitmap = bitmapDrawable.getBitmap();
                if (recycleBitmap && bitmap != null) {
                    bitmap.recycle();
                }
            }
            iv.setImageBitmap(null);
            iv.setBackground(null);
            continue;
        }

        child.setBackground(null);

    }

    viewGroup.setBackground(null);
}
 

public DatePickerCalendarDelegate(DatePicker delegator, Context context, AttributeSet attrs,
        int defStyleAttr, int defStyleRes) {
    super(delegator, context);

    final Locale locale = mCurrentLocale;
    mCurrentDate = Calendar.getInstance(locale);
    mTempDate = Calendar.getInstance(locale);
    mMinDate = Calendar.getInstance(locale);
    mMaxDate = Calendar.getInstance(locale);

    mMinDate.set(DEFAULT_START_YEAR, Calendar.JANUARY, 1);
    mMaxDate.set(DEFAULT_END_YEAR, Calendar.DECEMBER, 31);

    final Resources res = mDelegator.getResources();
    final TypedArray a = mContext.obtainStyledAttributes(attrs,
            R.styleable.DatePicker, defStyleAttr, defStyleRes);
    final LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(
            Context.LAYOUT_INFLATER_SERVICE);
    final int layoutResourceId = a.getResourceId(
            R.styleable.DatePicker_internalLayout, R.layout.date_picker_material);

    // Set up and attach container.
    mContainer = (ViewGroup) inflater.inflate(layoutResourceId, mDelegator, false);
    mContainer.setSaveFromParentEnabled(false);
    mDelegator.addView(mContainer);

    // Set up header views.
    final ViewGroup header = mContainer.findViewById(R.id.date_picker_header);
    mHeaderYear = header.findViewById(R.id.date_picker_header_year);
    mHeaderYear.setOnClickListener(mOnHeaderClickListener);
    mHeaderMonthDay = header.findViewById(R.id.date_picker_header_date);
    mHeaderMonthDay.setOnClickListener(mOnHeaderClickListener);

    // For the sake of backwards compatibility, attempt to extract the text
    // color from the header month text appearance. If it's set, we'll let
    // that override the "real" header text color.
    ColorStateList headerTextColor = null;

    @SuppressWarnings("deprecation")
    final int monthHeaderTextAppearance = a.getResourceId(
            R.styleable.DatePicker_headerMonthTextAppearance, 0);
    if (monthHeaderTextAppearance != 0) {
        final TypedArray textAppearance = mContext.obtainStyledAttributes(null,
                ATTRS_TEXT_COLOR, 0, monthHeaderTextAppearance);
        final ColorStateList legacyHeaderTextColor = textAppearance.getColorStateList(0);
        headerTextColor = applyLegacyColorFixes(legacyHeaderTextColor);
        textAppearance.recycle();
    }

    if (headerTextColor == null) {
        headerTextColor = a.getColorStateList(R.styleable.DatePicker_headerTextColor);
    }

    if (headerTextColor != null) {
        mHeaderYear.setTextColor(headerTextColor);
        mHeaderMonthDay.setTextColor(headerTextColor);
    }

    // Set up header background, if available.
    if (a.hasValueOrEmpty(R.styleable.DatePicker_headerBackground)) {
        header.setBackground(a.getDrawable(R.styleable.DatePicker_headerBackground));
    }

    a.recycle();

    // Set up picker container.
    mAnimator = mContainer.findViewById(R.id.animator);

    // Set up day picker view.
    mDayPickerView = mAnimator.findViewById(R.id.date_picker_day_picker);
    mDayPickerView.setFirstDayOfWeek(mFirstDayOfWeek);
    mDayPickerView.setMinDate(mMinDate.getTimeInMillis());
    mDayPickerView.setMaxDate(mMaxDate.getTimeInMillis());
    mDayPickerView.setDate(mCurrentDate.getTimeInMillis());
    mDayPickerView.setOnDaySelectedListener(mOnDaySelectedListener);

    // Set up year picker view.
    mYearPickerView = mAnimator.findViewById(R.id.date_picker_year_picker);
    mYearPickerView.setRange(mMinDate, mMaxDate);
    mYearPickerView.setYear(mCurrentDate.get(Calendar.YEAR));
    mYearPickerView.setOnYearSelectedListener(mOnYearSelectedListener);

    // Set up content descriptions.
    mSelectDay = res.getString(R.string.select_day);
    mSelectYear = res.getString(R.string.select_year);

    // Initialize for current locale. This also initializes the date, so no
    // need to call onDateChanged.
    onLocaleChanged(mCurrentLocale);

    setCurrentView(VIEW_MONTH_DAY);
}
 

public DatePickerCalendarDelegate(DatePicker delegator, Context context, AttributeSet attrs,
                                  int defStyleAttr, int defStyleRes) {
    super(delegator, context);

    final Locale locale = mCurrentLocale;
    mCurrentDate = Calendar.getInstance(locale);
    mTempDate = Calendar.getInstance(locale);
    mMinDate = Calendar.getInstance(locale);
    mMaxDate = Calendar.getInstance(locale);

    mMinDate.set(DEFAULT_START_YEAR, Calendar.JANUARY, 1);
    mMaxDate.set(DEFAULT_END_YEAR, Calendar.DECEMBER, 31);

    final Resources res = mDelegator.getResources();
    final TypedArray a = mContext.obtainStyledAttributes(attrs,
            R.styleable.DatePicker, defStyleAttr, defStyleRes);
    final LayoutInflater inflater = LayoutInflater.from(context);
    final int layoutResourceId = a.getResourceId(
            R.styleable.DatePicker_dtp_internalLayout, R.layout.date_picker_material);

    // Set up and attach container.
    mContainer = (ViewGroup) inflater.inflate(layoutResourceId, mDelegator, false);
    mDelegator.addView(mContainer);

    // Set up header views.
    final ViewGroup header = (ViewGroup) mContainer.findViewById(R.id.date_picker_header);
    mHeaderYear = (TextView) header.findViewById(R.id.date_picker_header_year);
    mHeaderYear.setOnClickListener(mOnHeaderClickListener);
    mHeaderMonthDay = (TextView) header.findViewById(R.id.date_picker_header_date);
    mHeaderMonthDay.setOnClickListener(mOnHeaderClickListener);

    // For the sake of backwards compatibility, attempt to extract the text
    // color from the header month text appearance. If it's set, we'll let
    // that override the "real" header text color.
    ColorStateList headerTextColor = null;

    if (headerTextColor == null) {
        //headerTextColor = a.getColorStateList(R.styleable.DatePicker_headerTextColor);
        headerTextColor = Utils.getColorStateList(context, a, R.styleable.DatePicker_dtp_headerTextColor);
    }

    if (headerTextColor != null) {
        mHeaderYear.setTextColor(headerTextColor);
        mHeaderMonthDay.setTextColor(headerTextColor);
    }

    // Set up header background, if available.
    //if (a.hasValueOrEmpty(R.styleable.DatePicker_headerBackground)) {
    Drawable headerBg = a.getDrawable(R.styleable.DatePicker_headerBackground);
    if (headerBg != null) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
            header.setBackground(headerBg);
        } else {
            header.setBackgroundDrawable(headerBg);
        }
    }

    a.recycle();

    // Set up picker container.
    mAnimator = mContainer.findViewById(R.id.animator);

    // Set up day picker view.
    mDayPickerView = mAnimator.findViewById(R.id.date_picker_day_picker);
    mDayPickerView.setFirstDayOfWeek(mFirstDayOfWeek);
    mDayPickerView.setMinDate(mMinDate.getTimeInMillis());
    mDayPickerView.setMaxDate(mMaxDate.getTimeInMillis());
    mDayPickerView.setDate(mCurrentDate.getTimeInMillis());
    mDayPickerView.setOnDaySelectedListener(mOnDaySelectedListener);

    // Set up year picker view.
    mYearPickerView = mAnimator.findViewById(R.id.date_picker_year_picker);
    mYearPickerView.setRange(mMinDate, mMaxDate);
    mYearPickerView.setYear(mCurrentDate.get(Calendar.YEAR));
    mYearPickerView.setOnYearSelectedListener(mOnYearSelectedListener);

    // Set up content descriptions.
    mSelectDay = res.getString(R.string.select_day);
    mSelectYear = res.getString(R.string.select_year);

    // Initialize for current locale. This also initializes the date, so no
    // need to call onDateChanged.
    onLocaleChanged(mCurrentLocale);

    setCurrentView(VIEW_MONTH_DAY);
}
 

public void showLongPressCling(boolean showWelcome) {
    mIsVisible = true;
    ViewGroup root = (ViewGroup) mLauncher.findViewById(R.id.launcher);
    View cling = mInflater.inflate(R.layout.longpress_cling, root, false);

    cling.setOnLongClickListener(new OnLongClickListener() {

        @Override
        public boolean onLongClick(View v) {
            mLauncher.showOverviewMode(true);
            dismissLongPressCling();
            return true;
        }
    });

    final ViewGroup content = (ViewGroup) cling.findViewById(R.id.cling_content);
    mInflater.inflate(showWelcome ? R.layout.longpress_cling_welcome_content
            : R.layout.longpress_cling_content, content);
    content.findViewById(R.id.cling_dismiss_longpress_info).setOnClickListener(this);

    if (TAG_CROP_TOP_AND_SIDES.equals(content.getTag())) {
        Drawable bg = new BorderCropDrawable(mLauncher.getResources().getDrawable(R.drawable.cling_bg),
                true, true, true, false);
        content.setBackground(bg);
    }

    root.addView(cling);

    if (showWelcome) {
        // This is the first cling being shown. No need to animate.
        return;
    }

    // Animate
    content.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {

        @Override
        public void onGlobalLayout() {
            content.getViewTreeObserver().removeOnGlobalLayoutListener(this);

            ObjectAnimator anim;
            if (TAG_CROP_TOP_AND_SIDES.equals(content.getTag())) {
                content.setTranslationY(-content.getMeasuredHeight());
                anim = LauncherAnimUtils.ofFloat(content, "translationY", 0);
            } else {
                content.setScaleX(0);
                content.setScaleY(0);
                PropertyValuesHolder scaleX = PropertyValuesHolder.ofFloat("scaleX", 1);
                PropertyValuesHolder scaleY = PropertyValuesHolder.ofFloat("scaleY", 1);
                anim = LauncherAnimUtils.ofPropertyValuesHolder(content, scaleX, scaleY);
            }

            anim.setDuration(SHOW_CLING_DURATION);
            anim.setInterpolator(new LogDecelerateInterpolator(100, 0));
            anim.start();
        }
    });
}
 

public void showLongPressCling(boolean showWelcome) {
    ViewGroup root = (ViewGroup) mLauncher.findViewById(R.id.launcher);
    View cling = mInflater.inflate(R.layout.longpress_cling, root, false);

    cling.setOnLongClickListener(new OnLongClickListener() {

        @Override
        public boolean onLongClick(View v) {
            mLauncher.getWorkspace().enterOverviewMode();
            dismissLongPressCling();
            return true;
        }
    });

    final ViewGroup content = (ViewGroup) cling.findViewById(R.id.cling_content);
    mInflater.inflate(showWelcome ? R.layout.longpress_cling_welcome_content
            : R.layout.longpress_cling_content, content);
    content.findViewById(R.id.cling_dismiss_longpress_info).setOnClickListener(this);

    if (TAG_CROP_TOP_AND_SIDES.equals(content.getTag())) {
        Drawable bg = new BorderCropDrawable(mLauncher.getResources().getDrawable(R.drawable.cling_bg),
                true, true, true, false);
        content.setBackground(bg);
    }

    root.addView(cling);

    if (showWelcome) {
        // This is the first cling being shown. No need to animate.
        return;
    }

    // Animate
    content.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {

        @Override
        public void onGlobalLayout() {
            content.getViewTreeObserver().removeOnGlobalLayoutListener(this);

            ObjectAnimator anim;
            if (TAG_CROP_TOP_AND_SIDES.equals(content.getTag())) {
                content.setTranslationY(-content.getMeasuredHeight());
                anim = LauncherAnimUtils.ofFloat(content, "translationY", 0);
            } else {
                content.setScaleX(0);
                content.setScaleY(0);
                PropertyValuesHolder scaleX = PropertyValuesHolder.ofFloat("scaleX", 1);
                PropertyValuesHolder scaleY = PropertyValuesHolder.ofFloat("scaleY", 1);
                anim = LauncherAnimUtils.ofPropertyValuesHolder(content, scaleX, scaleY);
            }

            anim.setDuration(SHOW_CLING_DURATION);
            anim.setInterpolator(new LogDecelerateInterpolator(100, 0));
            anim.start();
        }
    });
}