android.view.ViewTreeObserver.OnGlobalLayoutListener Java Examples

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

	getViewTreeObserver().addOnGlobalLayoutListener(
			new OnGlobalLayoutListener() {
				@SuppressWarnings("deprecation")
				@Override
				public void onGlobalLayout() {
					createShader();
					setMaskScale(1.0f);

					if (mCallback != null) {
						mCallback.onSetupAnimation(SpotlightView.this);
					}

					getViewTreeObserver()
							.removeOnGlobalLayoutListener(this);
				}
			});
}
 

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    scene = new SceneView(this);
    setContentView(scene);
    getSupportActionBarNotNull().setDisplayHomeAsUpEnabled(true);
    setInfoText(R.string.info_objects_control);

    // Waiting for scene to be laid out before setting up the items
    scene.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
        @Override
        public void onGlobalLayout() {
            scene.getViewTreeObserver().removeOnGlobalLayoutListener(this);
            showItems();
        }
    });
}
 

public void notifyDataSetChanged() {
    tabsContainer.removeAllViews();
    tabCount = pager.getAdapter().getCount();
    for (int i = 0; i < tabCount; i++) {
        if (pager.getAdapter() instanceof IconTabProvider) {
            addIconTab(i, ((IconTabProvider) pager.getAdapter()).getPageIconDrawable(i));
        }
    }
    updateTabStyles();
    getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
        @Override
        public void onGlobalLayout() {
            getViewTreeObserver().removeOnGlobalLayoutListener(this);
            currentPosition = pager.getCurrentItem();
            scrollToChild(currentPosition, 0);
        }
    });
}
 

private void initWithContext(Context context) {
  mScroller = new Scroller(context, new DecelerateInterpolator());
  // XListView need the scroll event, and it will dispatch the event to
  // user's listener (as a proxy).
  super.setOnScrollListener(this);

  m_context = context;
  // init header view
  mHeaderView = new XListViewHeader(context);
  mHeaderViewContent = (RelativeLayout) mHeaderView
      .findViewById(R.id.xlistview_header_content);
  addHeaderView(mHeaderView);

  // init header height
  mHeaderView.getViewTreeObserver().addOnGlobalLayoutListener(
      new OnGlobalLayoutListener() {
        @Override
        public void onGlobalLayout() {
          mHeaderViewHeight = mHeaderViewContent.getHeight();
          getViewTreeObserver().removeGlobalOnLayoutListener(this);
        }
      });
}
 

public void setListenerToRootView() {
    final View activityRootView = getWindow().getDecorView().findViewById(android.R.id.content);
    activityRootView.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
        @Override
        public void onGlobalLayout() {

            int heightDiff = activityRootView.getRootView().getHeight() - activityRootView.getHeight();
            if (heightDiff > 100) { // 99% of the time the height diff will be due to a keyboard.
                if (isOpened == false) {
                    //Do two things, make the view top visible and the editText smaller
                }
                isOpened = true;
            } else if (isOpened == true) {
                isOpened = false;
                final RecyclerView recyclerView = (RecyclerView) findViewById(R.id.main_view);
                recyclerView.getAdapter().notifyDataSetChanged();
            }
        }
    });
}
 

private void initView() {
   	 mHeader = (ViewGroup) findViewById(R.id.rl_top);
   	 mHeaderChild = mHeader.getChildAt(0);
        mContent = findViewById(R.id.ll_content);

        mHeader.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
            @SuppressWarnings("deprecation")
            @Override
            public void onGlobalLayout() {
                mHeader.getViewTreeObserver().removeGlobalOnLayoutListener(this);
                range = mHeader.getHeight();
                mHeader.getLayoutParams().height = range;
                mHeaderHeight = range;
            }
        });
	
}
 

private void initView(Context context) {

		scroller = new Scroller(context, new DecelerateInterpolator());

		headerView = new ZListViewHeader(context);
		footerView = new ZListViewFooter(context);

		headerViewContent = (RelativeLayout) headerView
				.findViewById(R.id.xlistview_header_content);
		headerView.getViewTreeObserver().addOnGlobalLayoutListener(
				new OnGlobalLayoutListener() {
					@SuppressWarnings("deprecation")
					@Override
					public void onGlobalLayout() {
						headerHeight = headerViewContent.getHeight();
						getViewTreeObserver()
								.removeGlobalOnLayoutListener(this);
					}
				});
		addHeaderView(headerView);

	}
 

/**
 * Inflates the content, which is associated with a specific tab.
 *
 * @param tab
 *         The tab, whose content should be inflated, as an instance of the class {@link Tab}.
 *         The tab may not be null
 * @param listener
 *         The layout listener, which should be notified, when the view has been inflated, as an
 *         instance of the type {@link OnGlobalLayoutListener} or null, if no listener should be
 *         notified
 */
private void inflateContent(@NonNull final Tab tab,
                            @Nullable final OnGlobalLayoutListener listener) {
    Pair<View, Boolean> pair = contentViewRecycler.inflate(tab);
    View view = pair.first;

    if (listener != null) {
        boolean inflated = pair.second;

        if (inflated) {
            view.getViewTreeObserver()
                    .addOnGlobalLayoutListener(new LayoutListenerWrapper(view, listener));
        } else {
            listener.onGlobalLayout();
        }
    }
}
 

/**
 * Creates and returns a layout listener, which allows to position the content of a tab, after
 * it has been inflated.
 *
 * @param tab
 *         The tab, whose content has been inflated, as an instance of the class {@link Tab}.
 *         The tab may not be null
 * @return The layout listener, which has been created, as an instance of the type {@link
 * OnGlobalLayoutListener}. The listener may not be null
 */
@NonNull
private OnGlobalLayoutListener createContentLayoutListener(@NonNull final Tab tab) {
    return new OnGlobalLayoutListener() {

        @Override
        public void onGlobalLayout() {
            View view = contentViewRecycler.getView(tab);

            if (view != null) {
                view.setX(0);
            }
        }

    };
}
 

private void initWithContext(Context context) {
	mScroller = new Scroller(context, new DecelerateInterpolator());
	// XListView need the scroll event, and it will dispatch the event to
	// user's listener (as a proxy).
	super.setOnScrollListener(this);

	m_context = context;
	// init header view
	mHeaderView = new XListViewHeader(context);
	mHeaderViewContent = (RelativeLayout) mHeaderView.findViewById(R.id.xlistview_header_content);
	addHeaderView(mHeaderView);

	// init header height
	mHeaderView.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
		@Override
		public void onGlobalLayout() {
			mHeaderViewHeight = mHeaderViewContent.getHeight();
			getViewTreeObserver().removeGlobalOnLayoutListener(this);
		}
	});
}
 

/**
 * Creates and returns a listener, which allows to observe, when the child of the dialog's
 * scroll view has been layouted. If the scroll view's height is greater than necessary, its
 * height is reduced to match the height of its child.
 *
 * @return The listener, which has been created, as an instance of the type {@link
 * OnGlobalLayoutListener}. The listener may not be null
 */
@NonNull
private OnGlobalLayoutListener createScrollViewChildLayoutListener() {
    return new OnGlobalLayoutListener() {

        @Override
        public void onGlobalLayout() {
            View child = scrollView.getChildAt(0);
            int childHeight = child.getHeight();
            int containerHeight = scrollView.getHeight() - scrollView.getPaddingTop() -
                    scrollView.getPaddingBottom();

            if (containerHeight > childHeight) {
                LinearLayout.LayoutParams layoutParams =
                        (LinearLayout.LayoutParams) scrollView.getLayoutParams();
                layoutParams.height = childHeight;
                layoutParams.weight = 0;
                scrollView.requestLayout();
            }

            ViewUtil.removeOnGlobalLayoutListener(child.getViewTreeObserver(), this);
        }

    };
}
 

public void moveToLeft() {
    if (getWidth() == 0 || getHeight() == 0) {
        final ViewTreeObserver observer = getViewTreeObserver();
        observer.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
                public void onGlobalLayout() {
                    moveToLeft();
                    getViewTreeObserver().removeOnGlobalLayoutListener(this);
                }
            });
    }
    final RectF edges = mTempEdges;
    getEdgesHelper(edges);
    final float scale = mRenderer.scale;
    mCenterX += Math.ceil(edges.left / scale);
    updateCenter();
}
 

/**
 * Creates and returns a layout listener, which allows to adapt the size and position of a tab,
 * once its view has been inflated.
 *
 * @param item
 *         The item, which corresponds to the tab, whose view should be adapted, as an instance
 *         of the class {@link AbstractItem}. The item may not be null
 * @param dragging
 *         True, if the item is currently being dragged, false otherwise
 * @param layoutListener
 *         The layout lister, which should be notified, when the created listener is invoked, as
 *         an instance of the type {@link OnGlobalLayoutListener} or null, if no listener should
 *         be notified
 * @return The layout listener, which has been created, as an instance of the type {@link
 * OnGlobalLayoutListener}. The layout listener may not be null
 */
@NonNull
private OnGlobalLayoutListener createInflateViewLayoutListener(@NonNull final AbstractItem item,
                                                               final boolean dragging,
                                                               @Nullable final OnGlobalLayoutListener layoutListener) {
    return new OnGlobalLayoutListener() {

        @Override
        public void onGlobalLayout() {
            adaptViewSize(item);
            updateView(item, dragging);

            if (layoutListener != null) {
                layoutListener.onGlobalLayout();
            }
        }

    };
}
 

/**
 * Creates and returns a layout listener, which allows to position a tab, which is a neighbor of
 * the currently selected tab, when swiping horizontally.
 *
 * @param neighbor
 *         The tab item, which corresponds to the neighboring tab, as an instance of the class
 *         {@link TabItem}. The tab item may not be null
 * @param dragDistance
 *         The distance of the swipe gesture in pixels as a {@link Float} value
 * @return The layout listener, which has been created, as an instance of the type {@link
 * OnGlobalLayoutListener}. The layout listener may not be null
 */
@NonNull
private OnGlobalLayoutListener createSwipeNeighborLayoutListener(
        @NonNull final TabItem neighbor, final float dragDistance) {
    return new OnGlobalLayoutListener() {

        @Override
        public void onGlobalLayout() {
            float position;

            if (dragDistance > 0) {
                position = -getTabSwitcher().getWidth() + dragDistance - swipedTabDistance;
            } else {
                position = getTabSwitcher().getWidth() + dragDistance + swipedTabDistance;
            }

            getArithmetics().setPosition(Axis.X_AXIS, neighbor, position);
        }

    };
}
 

/**
 * @param children
 *            The child Views to add to parent.
 * @param scrollToViewIdx
 *            The index of the View to scroll to after initialisation.
 * @param sizeCallback
 *            A SizeCallback to interact with the HSV.
 */
public void initViews(View[] children, int scrollToViewIdx, SizeCallback sizeCallback) {
    // A ViewGroup MUST be the only child of the HSV
    ViewGroup parent = (ViewGroup) getChildAt(0);

    // Add all the children, but add them invisible so that the layouts are calculated, but you can't see the Views
    for (int i = 0; i < children.length; i++) {
        children[i].setVisibility(View.INVISIBLE);
        parent.addView(children[i]);
    }

    // Add a layout listener to this HSV
    // This listener is responsible for arranging the child views.
    OnGlobalLayoutListener listener = new MyOnGlobalLayoutListener(parent, children, scrollToViewIdx, sizeCallback);
    getViewTreeObserver().addOnGlobalLayoutListener(listener);
}
 

private void addOnGlobalLayoutListener(final int position) {
        mOnGlobalLayoutListener = new OnGlobalLayoutListener() {

            @SuppressWarnings("deprecation")
            @Override
            public void onGlobalLayout() {
//                int count = mFeedsListView.getHeaderViewsCount();
//                int headerheight = 0;
//                if (count > 0) {
//                    for (int i = 0; i < count; i++) {
//                        View view = mFeedsListView.getChildAt(i);
//                        headerheight += view.getHeight();
//                    }
//                }
//                mFeedsListView.setSelectionFromTop(position - 1, headerheight);
                mRootView.getRootView().getViewTreeObserver()
                        .removeGlobalOnLayoutListener(mOnGlobalLayoutListener);
            }
        };
        mRootView.getRootView().getViewTreeObserver()
                .addOnGlobalLayoutListener(mOnGlobalLayoutListener);
    }
 

/**
 * <br>调用时机：可见性 或者 布局状态改变的时候 如果view背景换了 那么一定invalited那么布局状态一定改变了
 * <br>Register a callback to be invoked when the global layout state or the visibility of views within the view tree changes
 *
 * @param v
 * @param gs 枚举表示 测量后是否移除此监听 目的是：为了防止被多次调用 (用完就移除     除非特殊一直想监听)
 */
public static void measure(final View v, final ListenerState gs, final OnMeasureListener oml) {
    ViewTreeObserver vto = v.getViewTreeObserver();
    vto.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {

        @SuppressWarnings("deprecation")
        @Override
        public void onGlobalLayout() {
            int height = v.getMeasuredHeight();
            int width = v.getMeasuredWidth();
            if (oml != null) {
                oml.measureResult(v, width, height);
            }
            switch (gs) {
                case MEASURE_REMOVE:
                    v.getViewTreeObserver().removeGlobalOnLayoutListener(this);
                    break;
                case MEASURE_CONTINUE:
                    break;
                default:
                    break;
            }
        }
    });
}
 

public void notifyDataSetChanged() {
    tabsContainer.removeAllViews();
    tabCount = pager.getAdapter().getCount();
    for (int i = 0; i < tabCount; i++)
        addTabView(i, pager.getAdapter().getPageTitle(i).toString());

    getViewTreeObserver().addOnGlobalLayoutListener(
            new OnGlobalLayoutListener() {

                @SuppressWarnings("deprecation")
                @TargetApi(Build.VERSION_CODES.JELLY_BEAN)
                @Override
                public void onGlobalLayout() {
                    if (Build.VERSION.SDK_INT < 16)
                        getViewTreeObserver().removeGlobalOnLayoutListener(
                                this);
                    else
                        getViewTreeObserver().removeOnGlobalLayoutListener(
                                this);
                    currentPosition = pager.getCurrentItem();
                    setChooseTabViewTextColor(currentPosition);
                    scrollToChild(currentPosition, 0);
                }
            });
}
 

private void initializeScrollForRtl() {
    final HorizontalScrollView scroll =
            (HorizontalScrollView) findViewById(R.id.wallpaper_scroll_container);

    if (scroll.getLayoutDirection() == View.LAYOUT_DIRECTION_RTL) {
        final ViewTreeObserver observer = scroll.getViewTreeObserver();
        observer.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
            public void onGlobalLayout() {
                LinearLayout masterWallpaperList =
                        (LinearLayout) findViewById(R.id.master_wallpaper_list);
                scroll.scrollTo(masterWallpaperList.getWidth(), 0);
                scroll.getViewTreeObserver().removeOnGlobalLayoutListener(this);
            }
        });
    }
}
 

private void init(Context context) {
	mScroller = new Scroller(context, new DecelerateInterpolator());
	super.setOnScrollListener(this);
	// init header view
	mHeaderView = new PullToRefreshListHeader(context);
	mHeaderViewContent = (RelativeLayout) mHeaderView.findViewById(R.id.xlistview_header_content);
	mHeaderTimeView = (TextView) mHeaderView.findViewById(R.id.xlistview_header_time);
	addHeaderView(mHeaderView);

	// init footer view
	mFooterView = new PullToRefreshListFooter(context);

	// init header height
	mHeaderView.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
		@Override
		public void onGlobalLayout() {
			mHeaderViewHeight = mHeaderViewContent.getHeight();
			getViewTreeObserver().removeGlobalOnLayoutListener(this);
		}
	});
	MAX_X = dp2px(MAX_X);
	MAX_Y = dp2px(MAX_Y);
	mTouchState = TOUCH_STATE_NONE;
}
 

@Override
protected void onLayout(boolean changed, int left, int top, int right,
		int bottom) {
	super.onLayout(changed, left, top, right, bottom);

	if (requestCenterMap) {
		requestCenterMap = false;

		final ViewTreeObserver observer = this.getViewTreeObserver();
		if (observer.isAlive()) {
			observer.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
				@Override
				public void onGlobalLayout() {
					doCorrectPosition(true, false);
					jumpTo(getOriginalMapWidth() / 2,
							getOriginalMapHeight() / 2);

					observer.removeGlobalOnLayoutListener(this);
				}
			});
		}
	} else {
		doCorrectPosition(false, false);
	}
}
 

/**
 * Fix the bug of 5497 in Android.
 * <p>It will clean the adjustResize</p>
 *
 * @param window The window.
 */
public static void fixAndroidBug5497(@NonNull final Window window) {
    int softInputMode = window.getAttributes().softInputMode;
    window.setSoftInputMode(softInputMode & ~WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE);
    final FrameLayout contentView = window.findViewById(android.R.id.content);
    final View contentViewChild = contentView.getChildAt(0);
    final int paddingBottom = contentViewChild.getPaddingBottom();
    final int[] contentViewInvisibleHeightPre5497 = {getContentViewInvisibleHeight(window)};
    contentView.getViewTreeObserver()
            .addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
                @Override
                public void onGlobalLayout() {
                    int height = getContentViewInvisibleHeight(window);
                    if (contentViewInvisibleHeightPre5497[0] != height) {
                        contentViewChild.setPadding(
                                contentViewChild.getPaddingLeft(),
                                contentViewChild.getPaddingTop(),
                                contentViewChild.getPaddingRight(),
                                paddingBottom + getDecorViewInvisibleHeight(window)
                        );
                        contentViewInvisibleHeightPre5497[0] = height;
                    }
                }
            });
}
 

/**
 * Register soft input changed listener.
 *
 * @param window   The window.
 * @param listener The soft input changed listener.
 */
public static void registerSoftInputChangedListener(@NonNull final Window window,
                                                    @NonNull final OnSoftInputChangedListener listener) {
    final int flags = window.getAttributes().flags;
    if ((flags & WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS) != 0) {
        window.clearFlags(WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS);
    }
    final FrameLayout contentView = window.findViewById(android.R.id.content);
    final int[] decorViewInvisibleHeightPre = {getDecorViewInvisibleHeight(window)};
    OnGlobalLayoutListener onGlobalLayoutListener = new OnGlobalLayoutListener() {
        @Override
        public void onGlobalLayout() {
            int height = getDecorViewInvisibleHeight(window);
            if (decorViewInvisibleHeightPre[0] != height) {
                listener.onSoftInputChanged(height);
                decorViewInvisibleHeightPre[0] = height;
            }
        }
    };
    contentView.getViewTreeObserver().addOnGlobalLayoutListener(onGlobalLayoutListener);
    contentView.setTag(TAG_ON_GLOBAL_LAYOUT_LISTENER, onGlobalLayoutListener);
}
 

/**
 * Creates and returns a layout listener, which allows to adapt the bottom margin of a tab, once
 * its view has been inflated.
 *
 * @param item
 *         The item, which corresponds to the tab, whose view should be adapted, as an instance
 *         of the class {@link AbstractItem}. The item may not be null
 * @return The layout listener, which has been created, as an instance of the type {@link
 * OnGlobalLayoutListener}. The layout listener may not be null
 */
private OnGlobalLayoutListener createBottomMarginLayoutListener(
        @NonNull final AbstractItem item) {
    return new OnGlobalLayoutListener() {

        @Override
        public void onGlobalLayout() {
            View view = item.getView();

            if (tabViewBottomMargin == -1) {
                tabViewBottomMargin = calculateBottomMargin(item);
            }

            FrameLayout.LayoutParams layoutParams =
                    (FrameLayout.LayoutParams) view.getLayoutParams();
            layoutParams.bottomMargin = tabViewBottomMargin;
            view.setLayoutParams(layoutParams);
        }

    };
}
 

private void initWithContext(Context context, AttributeSet attrs) {
    ScrollUtils.disableOVER_SCROLL_NEVER(this);

    mScroller = new Scroller(context, new DecelerateInterpolator());
    // PullToRefreshListView need the scroll event, and it will dispatch the
    // event to
    // user's listener (as a proxy).
    super.setOnScrollListener(this);

    // init header view
    mHeaderView = new PullToRefreshListViewHeader(context, attrs);
    mHeaderViewContent = (RelativeLayout) mHeaderView
            .findViewById(R.id.pulltorefresh_listview_header_content);
    mHeaderTimeView = (TextView) mHeaderView
            .findViewById(R.id.pulltorefresh_listview_header_time);
    addHeaderView(mHeaderView);

    // init footer view
    mFooterView = new PullToRefreshListViewFooter(context, attrs);

    // init header height
    mHeaderView.getViewTreeObserver().addOnGlobalLayoutListener(
            new OnGlobalLayoutListener() {
                @Override
                public void onGlobalLayout() {
                    mHeaderViewHeight = mHeaderViewContent.getHeight();
                    getViewTreeObserver()
                            .removeGlobalOnLayoutListener(this);
                }
            });

    setPullRefreshEnable(mEnablePullRefresh);
    setPullLoadEnable(mEnablePullRefresh);
}
 

private void init(Context context) {
	//mScroller = new Scroller(context, new DecelerateInterpolator());
	mScroller = ScrollerCompat.create(context,new DecelerateInterpolator());
	super.setOnScrollListener(this);
	// init header view
	mHeaderView = new PullToRefreshListHeader(context);
	mHeaderViewContent = (RelativeLayout) mHeaderView.findViewById(R.id.xlistview_header_content);
	mHeaderTimeView = (TextView) mHeaderView.findViewById(R.id.xlistview_header_time);
	addHeaderView(mHeaderView);

	// init footer view
	mFooterView = new PullToRefreshListFooter(context);

	// init header height
	mHeaderView.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
		@SuppressWarnings("deprecation")
		@Override
		public void onGlobalLayout() {
			mHeaderViewHeight = mHeaderViewContent.getHeight();
			if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
				getViewTreeObserver().removeOnGlobalLayoutListener(this);
			}else{
				getViewTreeObserver().removeGlobalOnLayoutListener(this);
			}
		}
	});
	MAX_X = dp2px(MAX_X);
	MAX_Y = dp2px(MAX_Y);
	mTouchState = TOUCH_STATE_NONE;
}
 

/**
 * 直接获取控件的宽、高
 * @param view
 * @return int[]
 */
public static int[] getWidgetWH(final View view){
    ViewTreeObserver vto2 = view.getViewTreeObserver();
    vto2.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
        @Override
        public void onGlobalLayout() {
        	view.getViewTreeObserver().removeGlobalOnLayoutListener(this);
        }
    });
	return new int[]{view.getWidth(),view.getHeight()};
}
 

public void notifyDataSetChanged() {
    //先移除掉所有的View ，防止重复添加
    tabsContainer.removeAllViews();

    tabCount = pager.getAdapter().getCount();

    for (int i = 0; i < tabCount; i++) {
        //区分是文字还是Icon的导航
        if (pager.getAdapter() instanceof IconTabProvider) {
            addIconTab(i, ((IconTabProvider) pager.getAdapter()).getPageIconResId(i));
        } else {
            addTextTab(i, pager.getAdapter().getPageTitle(i).toString());
        }

    }

    updateTabStyles();

    getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {

        @SuppressWarnings("deprecation")
        @SuppressLint("NewApi")
        @Override
        public void onGlobalLayout() {

            if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN) {
                getViewTreeObserver().removeGlobalOnLayoutListener(this);
            } else {
                getViewTreeObserver().removeOnGlobalLayoutListener(this);
            }

            currentPosition = pager.getCurrentItem();
            scrollToChild(currentPosition, 0);

        }
    });

}
 

public void notifyDataSetChanged() {

		tabsContainer.removeAllViews();

		tabCount = pager.getAdapter().getCount();

		for (int i = 0; i < tabCount; i++) {

			if (pager.getAdapter() instanceof IconTabProvider) {
				addIconTab(i, ((IconTabProvider) pager.getAdapter()).getPageIconResId(i));
			} else {
				addTextTab(i, pager.getAdapter().getPageTitle(i).toString());
			}

		}

		updateTabStyles();

		getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {

			@SuppressWarnings("deprecation")
			@SuppressLint("NewApi")
			@Override
			public void onGlobalLayout() {

				if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN) {
					getViewTreeObserver().removeGlobalOnLayoutListener(this);
				} else {
					getViewTreeObserver().removeOnGlobalLayoutListener(this);
				}

				currentPosition = pager.getCurrentItem();
				scrollToChild(currentPosition, 0);
			}
		});

	}
 

public void notifyDataSetChanged() {

		tabsContainer.removeAllViews();

		tabCount = pager.getAdapter().getCount();

		for (int i = 0; i < tabCount; i++) {

			if (pager.getAdapter() instanceof IconTabProvider) {
				addIconTab(i, ((IconTabProvider) pager.getAdapter()).getPageIconResId(i));
			} else {
				addTextTab(i, pager.getAdapter().getPageTitle(i).toString());
			}

		}

		updateTabStyles();

		getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {

			@SuppressWarnings("deprecation")
			@SuppressLint("NewApi")
			@Override
			public void onGlobalLayout() {

				if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN) {
					getViewTreeObserver().removeGlobalOnLayoutListener(this);
				} else {
					getViewTreeObserver().removeOnGlobalLayoutListener(this);
				}

				currentPosition = pager.getCurrentItem();
				scrollToChild(currentPosition, 0);
			}
		});

	}