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

/**
 * 调整 parent 的 child views 到指定的数量，并存入 target
 */
@SuppressWarnings("unchecked")
public static <V extends View> void fitChildViews(ViewGroup parent, V[] target, ViewPool<V> pool) {
    int childCount = parent.getChildCount();
    // 移除多出的项
    while (target.length < childCount) {
        V view = (V) parent.getChildAt(0);
        parent.removeViewAt(0);
        pool.recycle(view);
        childCount--;
    }
    // 收集已有的项
    for (int i = 0; i < childCount; i++) {
        target[i] = (V) parent.getChildAt(i);
    }
    // 添加并收集新增的项
    while (target.length > childCount) {
        target[childCount] = pool.obtain(parent);
        parent.addView(target[childCount]);
        childCount++;
    }
}
 

private void detachTrackerFrameLayout(Activity activity) {
    if (activity == null || activity instanceof TabActivity) {
        return;
    }

    try {
        ViewGroup container = (ViewGroup) activity.findViewById(android.R.id.content);

        if (container == null) {
            return;
        }

        if (container.getChildAt(0) instanceof TrackerFrameLayout) {
            container.removeViewAt(0);
        }
    } catch (Exception e) {
        TrackerLog.e(e.toString());
    }

}
 

/**
 * 调整 parent 的 child views 到指定的数量，并存入 target
 */
@SuppressWarnings("unchecked")
public static <V extends View> void fitChildViews(ViewGroup parent, V[] target, ViewPool<V> pool) {
    int childCount = parent.getChildCount();
    // 移除多出的项
    while (target.length < childCount) {
        V view = (V) parent.getChildAt(0);
        parent.removeViewAt(0);
        pool.recycle(view);
        childCount--;
    }
    // 收集已有的项
    for (int i = 0; i < childCount; i++) {
        target[i] = (V) parent.getChildAt(i);
    }
    // 添加并收集新增的项
    while (target.length > childCount) {
        target[childCount] = pool.obtain(parent);
        parent.addView(target[childCount]);
        childCount++;
    }
}
 

public View applyTo(View target, int tipsId) {
    mTargetView = target;
    ViewGroup parent = (ViewGroup) target.getParent();
    if (parent == null) {
        return null;
    }
    View tipsView;
    if (parent instanceof TipsContainer) {
        tipsView = addTipsViewToContainer(target, parent, tipsId);
    } else {
        TipsContainer tipsContainerView = new TipsContainer(target.getContext());
        ViewGroup.LayoutParams targetParams = target.getLayoutParams();
        int index = parent.indexOfChild(target);
        parent.removeViewAt(index);
        parent.addView(tipsContainerView, index, targetParams);
        Drawable background = target.getBackground();
        if (background != null) {
            tipsContainerView.setBackground(background);
        }
        tipsView = addTipsViewToContainer(target, tipsContainerView, tipsId);
    }
    return tipsView;
}
 

private static void insertLayoutIntoViewGroup(ViewGroup viewGroup,
        PullToRefreshLayout pullToRefreshLayout) {
    // Move all children to PullToRefreshLayout. This code looks a bit silly but the child
    // indices change every time we remove a View (so we can't just iterate through)
    View child = viewGroup.getChildAt(0);
    while (child != null) {
        viewGroup.removeViewAt(0);
        pullToRefreshLayout.addView(child);
        child = viewGroup.getChildAt(0);
    }

    viewGroup.addView(pullToRefreshLayout, ViewGroup.LayoutParams.MATCH_PARENT,
            ViewGroup.LayoutParams.MATCH_PARENT);
}
 

private static void removeContainerView(ViewGroup tipsContainerView, View targetView) {
    ViewGroup parent = (ViewGroup) tipsContainerView.getParent();
    ViewGroup.LayoutParams targetParams = tipsContainerView.getLayoutParams();
    int index = parent.indexOfChild(tipsContainerView);
    parent.removeViewAt(index);
    if (targetView.getParent() != null) {
        ((ViewGroup) targetView.getParent()).removeView(targetView);
    }
    parent.addView(targetView, index, targetParams);
}
 

public void remove() {
    if (getParent() == null || _labelViewContainerID == -1) {
        return;
    }

    ViewGroup frameContainer = (ViewGroup) getParent();
    assert (frameContainer.getChildCount() == 2);
    View target = frameContainer.getChildAt(0);

    ViewGroup parentContainer = (ViewGroup) frameContainer.getParent();
    int groupIndex = parentContainer.indexOfChild(frameContainer);
    if (frameContainer.getParent() instanceof RelativeLayout) {
        for (int i = 0; i < parentContainer.getChildCount(); i++) {
            if (i == groupIndex) {
                continue;
            }
            View view = parentContainer.getChildAt(i);
            RelativeLayout.LayoutParams para = (RelativeLayout.LayoutParams) view.getLayoutParams();
            for (int j = 0; j < para.getRules().length; j++) {
                if (para.getRules()[j] == _labelViewContainerID) {
                    para.getRules()[j] = target.getId();
                }
            }
            view.setLayoutParams(para);
        }
    }

    ViewGroup.LayoutParams frameLayoutParam = frameContainer.getLayoutParams();
    target.setLayoutParams(frameLayoutParam);
    parentContainer.removeViewAt(groupIndex);
    frameContainer.removeView(target);
    frameContainer.removeView(this);
    parentContainer.addView(target,groupIndex);
    _labelViewContainerID = -1;
}
 

/**
 * This method can be overriden to recycle (remove) {@param ad} from {@param wrapper} view before adding to wrap.
 * By default it will look for {@param ad} in the direct children of {@param wrapper} and remove the first occurence.
 * See the super's implementation for instance.
 * The NativeExpressHolder recycled by the RecyclerView may be a different
 * instance than the one used previously for this position. Clear the
 * wrapper of any subviews in case it has a different
 * AdView associated with it
 */
@Override
protected void recycleAdViewWrapper(@NonNull ViewGroup wrapper, @NonNull NativeExpressAdView ad) {
    for (int i = 0; i < wrapper.getChildCount(); i++) {
        View v = wrapper.getChildAt(i);
        if (v instanceof NativeExpressAdView) {
            wrapper.removeViewAt(i);
            break;
        }
    }
}
 

public AlertPage setContentView(View view) {
    ViewGroup parent = (ViewGroup)mTvContent.getParent();
    int index = parent.indexOfChild(mTvContent);
    parent.removeViewAt(index);
    parent.addView(view, index);
    return this;
}
 

@TargetApi(Build.VERSION_CODES.KITKAT)
private static void clearPreviousSetting(Activity activity) {
    ViewGroup decorView = (ViewGroup) activity.getWindow().getDecorView();
    int count = decorView.getChildCount();
    if (count > 0 && decorView.getChildAt(count - 1) instanceof StatusBarView) {
        decorView.removeViewAt(count - 1);
        ViewGroup rootView = (ViewGroup) ((ViewGroup) activity.findViewById(android.R.id.content)).getChildAt(0);
        rootView.setPadding(0, 0, 0, 0);
    }
}
 

private static void insertLayoutIntoViewGroup(ViewGroup viewGroup,
        PullToRefreshLayout pullToRefreshLayout) {
    // Move all children to PullToRefreshLayout. This code looks a bit silly but the child
    // indices change every time we remove a View (so we can't just iterate through)
    View child = viewGroup.getChildAt(0);
    while (child != null) {
        viewGroup.removeViewAt(0);
        pullToRefreshLayout.addView(child);
        child = viewGroup.getChildAt(0);
    }

    viewGroup.addView(pullToRefreshLayout, ViewGroup.LayoutParams.MATCH_PARENT,
            ViewGroup.LayoutParams.MATCH_PARENT);
}
 

@Override
public final View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
	View layout = super.onCreateView(inflater, container, savedInstanceState);

	ListView lv = (ListView) layout.findViewById(android.R.id.list);
	ViewGroup parent = (ViewGroup) lv.getParent();

	// Remove ListView and add PullToRefreshListView in its place
	int lvIndex = parent.indexOfChild(lv);
	parent.removeViewAt(lvIndex);
	mPullToRefreshListView = onCreatePullToRefreshListView(inflater, savedInstanceState);
	parent.addView(mPullToRefreshListView, lvIndex, lv.getLayoutParams());

	return layout;
}
 

@Override
public void onConfigurationChanged(Configuration newConfig) {
    //屏幕旋转时刷新一下title
    super.onConfigurationChanged(newConfig);
    ViewGroup root = (ViewGroup) getRootView();
    if (root.getChildAt(0) instanceof TitleBar) {
        root.removeViewAt(0);
        initTitle();
    }
}
 

/**
 * 添加半透明矩形条
 *
 * @param activity       需要设置的 activity
 * @param statusBarAlpha 透明值
 */
private static void addTranslucentView(Activity activity, int statusBarAlpha) {
    ViewGroup contentView = (ViewGroup) activity.findViewById(android.R.id.content);
    // 移除半透明矩形,以免叠加
    if (contentView.getChildCount() > 1) {
        contentView.removeViewAt(1);
    }
    contentView.addView(createTranslucentStatusBarView(activity, statusBarAlpha));
}
 

private static void insertLayoutIntoViewGroup(ViewGroup viewGroup,
        PullToRefreshLayout pullToRefreshLayout) {
    // Move all children to PullToRefreshLayout. This code looks a bit silly but the child
    // indices change every time we remove a View (so we can't just iterate through)
    View child = viewGroup.getChildAt(0);
    while (child != null) {
        viewGroup.removeViewAt(0);
        pullToRefreshLayout.addView(child);
        child = viewGroup.getChildAt(0);
    }

    viewGroup.addView(pullToRefreshLayout, ViewGroup.LayoutParams.MATCH_PARENT,
            ViewGroup.LayoutParams.MATCH_PARENT);
}
 

/**
 * Moves a fragment to its expected final state or the fragment manager's state, depending
 * on whether the fragment manager's state is raised properly.
 *
 * @param f The fragment to change.
 */
void moveFragmentToExpectedState(final Fragment f) {
    if (f == null) {
        return;
    }
    int nextState = mCurState;
    if (f.mRemoving) {
        if (f.isInBackStack()) {
            nextState = Math.min(nextState, Fragment.CREATED);
        } else {
            nextState = Math.min(nextState, Fragment.INITIALIZING);
        }
    }

    moveToState(f, nextState, f.getNextTransition(), f.getNextTransitionStyle(), false);

    if (f.mView != null) {
        // Move the view if it is out of order
        Fragment underFragment = findFragmentUnder(f);
        if (underFragment != null) {
            final View underView = underFragment.mView;
            // make sure this fragment is in the right order.
            final ViewGroup container = f.mContainer;
            int underIndex = container.indexOfChild(underView);
            int viewIndex = container.indexOfChild(f.mView);
            if (viewIndex < underIndex) {
                container.removeViewAt(viewIndex);
                container.addView(f.mView, underIndex);
            }
        }
        if (f.mIsNewlyAdded && f.mContainer != null) {
            // Make it visible and run the animations
            f.mView.setTransitionAlpha(1f);
            f.mIsNewlyAdded = false;
            // run animations:
            Animator anim = loadAnimator(f, f.getNextTransition(), true, f.getNextTransitionStyle());
            if (anim != null) {
                anim.setTarget(f.mView);
                setHWLayerAnimListenerIfAlpha(f.mView, anim);
                anim.start();
            }
        }
    }
    if (f.mHiddenChanged) {
        completeShowHideFragment(f);
    }
}
 

@Override
public void destroyItem(ViewGroup container, int position, Object object) {
    position = adjustIndexForDirectionality(position, getCount());
    container.removeViewAt(position);
}
 

/**
* Remove all action buttons from the layout, in case the layout needs to be re-used.
*/
public void removeActionButtons (ViewGroup actionButtonViewGroup) {
    while (actionButtonViewGroup.getChildCount() > 0) {
        actionButtonViewGroup.removeViewAt(0);
    }
}
 

/**
 * Filter the child view at index and remove it if appropriate.
 * @param parent Parent to filter from
 * @param childIndex Index to filter
 * @return true if the child view at index was removed
 */
protected boolean filterLeftoverView(ViewGroup parent, int childIndex) {
    parent.removeViewAt(childIndex);
    return true;
}
 

/**
 * Filter the child view at index and remove it if appropriate.
 * @param parent Parent to filter from
 * @param childIndex Index to filter
 * @return true if the child view at index was removed
 */
protected boolean filterLeftoverView(ViewGroup parent, int childIndex) {
    parent.removeViewAt(childIndex);
    return true;
}