android.view.View#findViewWithTag ( )源码实例Demo

View findViewWithTagInHeadersOrFooters(ArrayList<FixedViewInfo> where, Object tag) {
    // Look in the passed in list of headers or footers for the view with
    // the tag.
    if (where != null) {
        int len = where.size();
        View v;

        for (int i = 0; i < len; i++) {
            v = where.get(i).view;

            if (!v.isRootNamespace()) {
                v = v.findViewWithTag(tag);

                if (v != null) {
                    return v;
                }
            }
        }
    }
    return null;
}
 

public void expandItem(final char unicode, final View view, final ListView list) {
    expandedItems.add(unicode);
    if (view == null) return;
    final View container = view.findViewWithTag("container");
    final SearchResultFragment fragment = (SearchResultFragment) view.getTag();
    new AsyncTask<Void, Void, Cursor>() {
        @Override
        protected Cursor doInBackground(Void... params) {
            return MCPDatabase.directSearch(unicode);
        }
        @Override
        protected void onPostExecute(Cursor data) {
            fragment.setData(data);
            container.setVisibility(View.VISIBLE);
            if (list == null) return;
            scrollListToShowItem(list, view);
        }
    }.execute();
}
 

@Override
public TextView getTextViewForDate(final long dayInMillis) {
    // Loop through all children
    final int childCount = getChildCount();
    for(int i = 0; i < childCount; i++) {
        final View weekLayout = getChildAt(i);
        if(weekLayout != null) {
            // Let the weekLayout find a view with a correct tag
            final View dayLayout = weekLayout.findViewWithTag(dayInMillis);
            if(dayLayout != null) {
                // Find the TextView, and return it
                return (TextView) dayLayout.findViewById(R.id.lib_calendar_day_text);
            }
        }
    }
    // No suitable TextView found, return null
    return null;
}
 

private void printViewsBehind(ViewGroup rootView) {
    if (!this.isInEditMode() && !(rootView instanceof BlurBehindView) && rootView.getVisibility() == View.VISIBLE && rootView.getAlpha() != 0.0F) {
        if (rootView.getBackground() != null) {
            this.blurCanvas.save();
            this.blurCanvas.translate((float) (this.childPositionInWindow[0] - this.thisPositionInWindow[0] + this.halfPaddingOnSides), (float) (this.halfPaddingOnSides + this.childPositionInWindow[1] - this.thisPositionInWindow[1]));
            rootView.getBackground().draw(this.blurCanvas);
            this.blurCanvas.restore();
        }

        for (int i = 0; i < rootView.getChildCount(); ++i) {
            View childView = rootView.getChildAt(i);
            if (childView.findViewWithTag(TAG_VIEW) != null & rootView.getVisibility() == View.VISIBLE) {
                this.printViewsBehind((ViewGroup) childView);
            } else if (childView.getVisibility() == View.VISIBLE) {
                this.blurCanvas.save();
                childView.getLocationOnScreen(this.childPositionInWindow);
                this.blurCanvas.translate((float) (this.halfPaddingOnSides + this.childPositionInWindow[0] - this.thisPositionInWindow[0]), (float) (this.halfPaddingOnSides + this.childPositionInWindow[1] - this.thisPositionInWindow[1]));
                this.blurCanvas.scale(childView.getScaleX(), childView.getScaleY());
                childView.draw(this.blurCanvas);
                this.blurCanvas.restore();
            }
        }
    }
}
 

@Override
public void onClick(View view) {

    // Extract day selected
    ViewGroup dayOfTheMonthContainer = (ViewGroup) view;
    String tagId = (String) dayOfTheMonthContainer.getTag();
    tagId = tagId.substring(DAY_OF_THE_MONTH_LAYOUT.length(), tagId.length());
    TextView dayOfTheMonthText = view.findViewWithTag(DAY_OF_THE_MONTH_TEXT + tagId);

    // Extract the day from the text
    Calendar calendar = Calendar.getInstance();
    calendar.set(Calendar.YEAR, currentCalendar.get(Calendar.YEAR));
    calendar.set(Calendar.MONTH, currentCalendar.get(Calendar.MONTH));
    calendar.set(Calendar.DAY_OF_MONTH, Integer.valueOf(dayOfTheMonthText.getText().toString()));

    markDayAsSelectedDay(calendar.getTime());

    // Fire event
    if (robotoCalendarListener == null) {
        throw new IllegalStateException("You must assign a valid RobotoCalendarListener first!");
    } else {
        robotoCalendarListener.onDayClick(calendar.getTime());
    }
}
 

@Override
public boolean onLongClick(View view) {

    // Extract day selected
    ViewGroup dayOfTheMonthContainer = (ViewGroup) view;
    String tagId = (String) dayOfTheMonthContainer.getTag();
    tagId = tagId.substring(DAY_OF_THE_MONTH_LAYOUT.length(), tagId.length());
    TextView dayOfTheMonthText = view.findViewWithTag(DAY_OF_THE_MONTH_TEXT + tagId);

    // Extract the day from the text
    Calendar calendar = Calendar.getInstance();
    calendar.set(Calendar.YEAR, currentCalendar.get(Calendar.YEAR));
    calendar.set(Calendar.MONTH, currentCalendar.get(Calendar.MONTH));
    calendar.set(Calendar.DAY_OF_MONTH, Integer.valueOf(dayOfTheMonthText.getText().toString()));

    markDayAsSelectedDay(calendar.getTime());

    // Fire event
    if (robotoCalendarListener == null) {
        throw new IllegalStateException("You must assign a valid RobotoCalendarListener first!");
    } else {
        robotoCalendarListener.onDayLongClick(calendar.getTime());
    }
    return true;
}
 

private void setWatermarkPadding(View view, int left, int top, int right, int bottom) {
  ImageView watermark = view.findViewWithTag("GoogleWatermark");
  // Watermark may be null if Maps failed to load.
  if (watermark == null) {
    return;
  }
  RelativeLayout.LayoutParams params = (RelativeLayout.LayoutParams) watermark.getLayoutParams();
  params.setMargins(left, top, right, bottom);
  watermark.setLayoutParams(params);
}
 

/**
 * Returns a {@code View} with a given tag.
 *
 * @param tag the <code>tag</code> of the {@code View} to be returned
 * @param index the index of the {@link View}. {@code 0} if only one is available
 * @param timeout the timeout in milliseconds
 * @return a {@code View} with a given tag if available, <code>null</code> otherwise
 */

public View getView(Object tag, int index, int timeout){
	//Because https://github.com/android/platform_frameworks_base/blob/master/core/java/android/view/View.java#L17005-L17007
	if(tag == null) {
		return null;
	}

	final Activity activity = activityUtils.getCurrentActivity(false);
	View viewToReturn = null;

	if(index < 1){
		index = 0;
		if(activity != null){
			//Using https://github.com/android/platform_frameworks_base/blob/master/core/java/android/app/Activity.java#L2070-L2072
			Window window = activity.getWindow();
			if(window != null) {
				View decorView = window.getDecorView();
				if(decorView != null) {
					viewToReturn = decorView.findViewWithTag(tag);
				}
			}
		}
	}

	if (viewToReturn != null) {
		return viewToReturn;
	}

	return waiter.waitForView(tag, index, timeout);
}
 

public static View getTargetView(Context context, View view) {
    View targetView = view.findViewWithTag(context.getString(R.string.N_factual_scroll_view));

    if (targetView != null && isViewVisible(targetView)) {
        return targetView;
    } else {
        try {
            traverseView(view);
        } catch (ViewUtil.ViewException e) {
            e.printStackTrace();
            return e.getExceptionView();
        }
    }
    return null;
}
 

private void findViewsById(View view) {

        robotoCalendarMonthLayout = view.findViewById(R.id.robotoCalendarDateTitleContainer);
        leftButton = view.findViewById(R.id.leftButton);
        rightButton = view.findViewById(R.id.rightButton);
        dateTitle = view.findViewById(R.id.monthText);

        LayoutInflater inflate = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        for (int i = 0; i < 42; i++) {

            int weekIndex = (i % 7) + 1;
            ViewGroup dayOfTheWeekLayout = view.findViewWithTag(DAY_OF_THE_WEEK_LAYOUT + weekIndex);

            // Create day of the month
            View dayOfTheMonthLayout = inflate.inflate(R.layout.roboto_calendar_day_of_the_month_layout, null);
            View dayOfTheMonthText = dayOfTheMonthLayout.findViewWithTag(DAY_OF_THE_MONTH_TEXT);
            View dayOfTheMonthBackground = dayOfTheMonthLayout.findViewWithTag(DAY_OF_THE_MONTH_BACKGROUND);
            View dayOfTheMonthCircleImage1 = dayOfTheMonthLayout.findViewWithTag(DAY_OF_THE_MONTH_CIRCLE_IMAGE_1);
            View dayOfTheMonthCircleImage2 = dayOfTheMonthLayout.findViewWithTag(DAY_OF_THE_MONTH_CIRCLE_IMAGE_2);

            // Set tags to identify them
            int viewIndex = i + 1;
            dayOfTheMonthLayout.setTag(DAY_OF_THE_MONTH_LAYOUT + viewIndex);
            dayOfTheMonthText.setTag(DAY_OF_THE_MONTH_TEXT + viewIndex);
            dayOfTheMonthBackground.setTag(DAY_OF_THE_MONTH_BACKGROUND + viewIndex);
            dayOfTheMonthCircleImage1.setTag(DAY_OF_THE_MONTH_CIRCLE_IMAGE_1 + viewIndex);
            dayOfTheMonthCircleImage2.setTag(DAY_OF_THE_MONTH_CIRCLE_IMAGE_2 + viewIndex);

            dayOfTheWeekLayout.addView(dayOfTheMonthLayout);
        }
    }
 

public void collapseItem(char unicode, View view, ListView list) {
    expandedItems.remove(unicode);
    if (view == null) return;
    View container = view.findViewWithTag("container");
    container.setVisibility(View.GONE);
    if (list == null) return;
    scrollListToShowItem(list, view);
}
 

/**
 * Find and sets the BottomSheetHeader to manage colors
 * @param child
 */
private void setBottomSheetHeader(View child) {
    if (child instanceof BottomSheetBehaviorView) {
        View view = child.findViewWithTag(BottomSheetHeaderView.TAG);
        if (view != null && view instanceof BottomSheetHeaderView) {
            BottomSheetBehaviorView b = (BottomSheetBehaviorView) child;
            RNBottomSheetBehavior behavior = b.behavior;
            headerView = (BottomSheetHeaderView) view;
            headerView.registerFields();
            headerView.toggle(behavior.getState() == RNBottomSheetBehavior.STATE_COLLAPSED);
            behavior.setHeader(headerView);
        }
    }
}
 

@Override
public void run() {
    View v;
    if( (v = mWeakView.get())==null){
        return;
    }
    View itemView = v.findViewWithTag(CustomSwipeListView.ITEMMAIN_LAYOUT_TAG);
    View swipeView = v.findViewWithTag(CustomSwipeListView.ITEMSWIPE_LAYOUT_TAG);
    if(swipeView.getHeight() != itemView.getHeight()) {
        swipeView.getLayoutParams().height = itemView.getHeight();
        swipeView.getLayoutParams().width = ViewGroup.LayoutParams.WRAP_CONTENT;
        v.requestLayout();
    }
}
 

public ViewHolder(View linearLayoutView) {
    super(linearLayoutView);
    image = (ImageView) linearLayoutView.findViewWithTag("image");
}
 

@OnEvent(VisibleEvent.class)
static void onVisible(ComponentContext c, @Prop View rootView, @Prop Output<View> foundView) {
  final View view = rootView.findViewWithTag("test_vt");
  foundView.set(view);
}
 

IconHolder(View itemView) {
    super(itemView);

    ivIcon = (ImageView) itemView.findViewWithTag("iv");
}
 

CateHolder(View itemView) {
    super(itemView);

    tvCate = (TextView) itemView.findViewWithTag("cate");
    tvCount = (TextView) itemView.findViewWithTag("count");
}
 

IconHolder(View itemView) {
    super(itemView);

    ivIcon = (ImageView) itemView.findViewWithTag("iv");
}
 

public AAH_CustomViewHolder(View x) {
    super(x);
    aah_vi = (AAH_VideoImage) x.findViewWithTag("aah_vi");
}
 

SectionViewHolder(View itemView) {
    super(itemView);
    this.titleView = (TextView) itemView.findViewWithTag("TITLE");
}