android.widget.ImageButton# getTag ( ) 源码实例Demo

/**
 * Animates the visibility of a tab's close button.
 *
 * @param viewHolder
 *         The view holder, which holds a reference to the close button, whose visibility should
 *         be animated, as an instance of the class {@link AbstractTabViewHolder}. The view
 *         holder may not be null
 * @param show
 *         True, if the close button should be shown, false otherwise
 */
private void animateCloseButtonVisibility(@NonNull final AbstractTabViewHolder viewHolder,
                                          final boolean show) {
    ImageButton closeButton = viewHolder.closeButton;
    Boolean visible = (Boolean) closeButton.getTag(R.id.tag_visibility);

    if (visible == null || visible != show) {
        closeButton.setTag(R.id.tag_visibility, show);

        if (closeButton.getAnimation() != null) {
            closeButton.getAnimation().cancel();
        }

        ViewPropertyAnimator animation = closeButton.animate();
        animation.setListener(createCloseButtonVisibilityAnimationListener(viewHolder, show));
        animation.alpha(show ? 1 : 0);
        animation.setStartDelay(0);
        animation.setDuration(closeButtonVisibilityAnimationDuration);
        animation.start();
    }
}
 

private static void setDoneState(ImageButton nextButton,
                                 Context context,
                                 final ClippingFrame finishButton,
                                 FormNavigationController.NavigationDetails details,
                                 ProgressBar progressBar) {
    if (nextButton.getTag() == null) {
        setFinishVisible(finishButton);
    } else if (!FormEntryConstants.NAV_STATE_DONE.equals(nextButton.getTag())) {
        nextButton.setTag(FormEntryConstants.NAV_STATE_DONE);
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
            expandAndShowFinishButton(context, finishButton);
        } else {
            setFinishVisible(finishButton);
        }
    }

    progressBar.setProgressDrawable(context.getResources().getDrawable(R.drawable.progressbar_full));
    progressBar.setProgress(details.totalQuestions);

    Log.i("Questions", "Form complete");
}
 

/**
 * Search recursively through all children of the parent layout and checks their class.
 * If they are ViewGroup classes, continues the recursion,
 * if they are View classes, terminates the recursion
 * <p>
 * Used in {@link #hideVisibleViews(ViewGroup)} to get all the Views that should be hidden
 * Used in {@link #showHiddenViews()} to get all the Views that should be shown
 *
 * @param parentLayout the top layout in XML file
 * @return a list of all non-ViewGroup views from the parent layout except the VideoView,
 * but including Toolbar
 */
private List<View> getVisibleChildViews(View parentLayout) {
    if (!shouldCheckChildren(parentLayout)) {
        return Collections.singletonList(parentLayout);
    }

    int childCount = ((ViewGroup) parentLayout).getChildCount();
    List<View> children = new ArrayList<>(childCount);
    for (int i = 0; i < childCount; i++) {
        View view = ((ViewGroup) parentLayout).getChildAt(i);
        if (shouldCheckChildren(view)) {
            children.addAll(getVisibleChildViews(view));
        } else {
            if (view instanceof FullscreenVideoView) {
                ImageButton fullscreenButton = view.findViewById(R.id.fullscreen_media_button);
                String buttonTag = (String) fullscreenButton.getTag();

                if (view.getVisibility() == VISIBLE &&
                        !Objects.equals(buttonTag, VIEW_TAG_CLICKED)) {
                    children.add(view);
                }
            } else {
                if (view.getVisibility() == VISIBLE) {
                    children.add(view);
                }
            }
        }
    }
    return children;
}
 

@Override public void onClick(View v){
	if (v instanceof ImageButton){
		ImageButton action = (ImageButton) v;
		Effect effect = (Effect) action.getTag();
		if (lastSelectionEffects.contains(effect)){
			richEditText.applyEffect(effect, false);
			setActionOff(action);
			lastSelectionEffects.remove(effect);
		}else{
			richEditText.applyEffect(effect, true);
			setActionOn(action);
			lastSelectionEffects.add(effect);
		}
	}
}
 

private void tileClick(int x, int y) {
    ImageButton tile = tiles[x][y];

    if (tile.getTag() == STATE_HIGHLIGHTED) {
        swap(swapTile[0], swapTile[1], x, y);
        swapTile = new int[]{-1, -1};
        incrementRound();
    } else {
        swapTile = new int[]{x, y};
        tile.setTag(STATE_PRESSED);
        tile.setEnabled(false);
        tile.setBackgroundResource(R.drawable.button_game_pressed);
        highlightNeighbours(x, y);
    }
}
 

private void updateDVDButton() {
    if(getView() == null) {
        return;
    }
    ImageButton dvd = (ImageButton) getView().findViewById(R.id.button_navigation);
    if(dvd != null && dvd.getTag() == null) {
        dvd.setVisibility(Preferences.get(getActivity()).isHideDVDTabSet() ? View.GONE : View.VISIBLE);
    }
}