Java Code Examples for android.content.res.TypedArray#hasValueOrEmpty()

/**
 * Do NOT use this constructor, use {@link PreferenceManager#createPreferenceScreen(Context)}.
 * @hide-
 */
public PreferenceScreen(Context context, AttributeSet attrs) {
    super(context, attrs, com.android.internal.R.attr.preferenceScreenStyle);

    TypedArray a = context.obtainStyledAttributes(null,
            com.android.internal.R.styleable.PreferenceScreen,
            com.android.internal.R.attr.preferenceScreenStyle,
            0);

    mLayoutResId = a.getResourceId(
            com.android.internal.R.styleable.PreferenceScreen_screenLayout,
            mLayoutResId);
    if (a.hasValueOrEmpty(com.android.internal.R.styleable.PreferenceScreen_divider)) {
        mDividerDrawable =
                a.getDrawable(com.android.internal.R.styleable.PreferenceScreen_divider);
        mDividerSpecified = true;
    }

    a.recycle();
}
 

@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);

    TypedArray a = getActivity().obtainStyledAttributes(null,
            com.android.internal.R.styleable.PreferenceFragment,
            com.android.internal.R.attr.preferenceFragmentStyle,
            0);

    ListView lv = (ListView) view.findViewById(android.R.id.list);
    if (lv != null
            && a.hasValueOrEmpty(com.android.internal.R.styleable.PreferenceFragment_divider)) {
        lv.setDivider(
                a.getDrawable(com.android.internal.R.styleable.PreferenceFragment_divider));
    }

    a.recycle();
}
 

public TabWidget(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
    super(context, attrs, defStyleAttr, defStyleRes);

    final TypedArray a = context.obtainStyledAttributes(
            attrs, R.styleable.TabWidget, defStyleAttr, defStyleRes);

    mDrawBottomStrips = a.getBoolean(R.styleable.TabWidget_tabStripEnabled, mDrawBottomStrips);

    // Tests the target SDK version, as set in the Manifest. Could not be
    // set using styles.xml in a values-v? directory which targets the
    // current platform SDK version instead.
    final boolean isTargetSdkDonutOrLower =
            context.getApplicationInfo().targetSdkVersion <= Build.VERSION_CODES.DONUT;

    final boolean hasExplicitLeft = a.hasValueOrEmpty(R.styleable.TabWidget_tabStripLeft);
    if (hasExplicitLeft) {
        mLeftStrip = a.getDrawable(R.styleable.TabWidget_tabStripLeft);
    } else if (isTargetSdkDonutOrLower) {
        mLeftStrip = context.getDrawable(R.drawable.tab_bottom_left_v4);
    } else {
        mLeftStrip = context.getDrawable(R.drawable.tab_bottom_left);
    }

    final boolean hasExplicitRight = a.hasValueOrEmpty(R.styleable.TabWidget_tabStripRight);
    if (hasExplicitRight) {
        mRightStrip = a.getDrawable(R.styleable.TabWidget_tabStripRight);
    } else if (isTargetSdkDonutOrLower) {
        mRightStrip = context.getDrawable(R.drawable.tab_bottom_right_v4);
    } else {
        mRightStrip = context.getDrawable(R.drawable.tab_bottom_right);
    }

    a.recycle();

    setChildrenDrawingOrderEnabled(true);
}
 

static boolean hasValueOrEmpty(TypedArray ta, int index) {
    if (Build.VERSION.SDK_INT >= 22) {
        return ta.hasValueOrEmpty(index);
    } else {
        return ta.hasValue(index);
    }
}
 

public ListView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
    super(context, attrs, defStyleAttr, defStyleRes);

    final TypedArray a = context.obtainStyledAttributes(
            attrs, R.styleable.ListView, defStyleAttr, defStyleRes);

    final CharSequence[] entries = a.getTextArray(R.styleable.ListView_entries);
    if (entries != null) {
        setAdapter(new ArrayAdapter<>(context, R.layout.simple_list_item_1, entries));
    }

    final Drawable d = a.getDrawable(R.styleable.ListView_divider);
    if (d != null) {
        // Use an implicit divider height which may be explicitly
        // overridden by android:dividerHeight further down.
        setDivider(d);
    }

    final Drawable osHeader = a.getDrawable(R.styleable.ListView_overScrollHeader);
    if (osHeader != null) {
        setOverscrollHeader(osHeader);
    }

    final Drawable osFooter = a.getDrawable(R.styleable.ListView_overScrollFooter);
    if (osFooter != null) {
        setOverscrollFooter(osFooter);
    }

    // Use an explicit divider height, if specified.
    if (a.hasValueOrEmpty(R.styleable.ListView_dividerHeight)) {
        final int dividerHeight = a.getDimensionPixelSize(
                R.styleable.ListView_dividerHeight, 0);
        if (dividerHeight != 0) {
            setDividerHeight(dividerHeight);
        }
    }

    mHeaderDividersEnabled = a.getBoolean(R.styleable.ListView_headerDividersEnabled, true);
    mFooterDividersEnabled = a.getBoolean(R.styleable.ListView_footerDividersEnabled, true);

    a.recycle();
}
 

/**
 * <p>Create a new, empty, non focusable popup window of dimension (0,0).</p>
 *
 * <p>The popup does not provide a background.</p>
 */
public PopupWindow(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
    mContext = context;
    mWindowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);

    final TypedArray a = context.obtainStyledAttributes(
            attrs, R.styleable.PopupWindow, defStyleAttr, defStyleRes);
    final Drawable bg = a.getDrawable(R.styleable.PopupWindow_popupBackground);
    mElevation = a.getDimension(R.styleable.PopupWindow_popupElevation, 0);
    mOverlapAnchor = a.getBoolean(R.styleable.PopupWindow_overlapAnchor, false);

    // Preserve default behavior from Gingerbread. If the animation is
    // undefined or explicitly specifies the Gingerbread animation style,
    // use a sentinel value.
    if (a.hasValueOrEmpty(R.styleable.PopupWindow_popupAnimationStyle)) {
        final int animStyle = a.getResourceId(R.styleable.PopupWindow_popupAnimationStyle, 0);
        if (animStyle == R.style.Animation_PopupWindow) {
            mAnimationStyle = ANIMATION_STYLE_DEFAULT;
        } else {
            mAnimationStyle = animStyle;
        }
    } else {
        mAnimationStyle = ANIMATION_STYLE_DEFAULT;
    }

    final Transition enterTransition = getTransition(a.getResourceId(
            R.styleable.PopupWindow_popupEnterTransition, 0));
    final Transition exitTransition;
    if (a.hasValueOrEmpty(R.styleable.PopupWindow_popupExitTransition)) {
        exitTransition = getTransition(a.getResourceId(
                R.styleable.PopupWindow_popupExitTransition, 0));
    } else {
        exitTransition = enterTransition == null ? null : enterTransition.clone();
    }

    a.recycle();

    setEnterTransition(enterTransition);
    setExitTransition(exitTransition);
    setBackgroundDrawable(bg);
}
 

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);
}
 

static boolean hasValueOrEmpty(TypedArray array, int index) {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP_MR1) {
        return array.hasValueOrEmpty(index);
    }
    return array.hasValue(index);
}