文件列表:

.idea/ (0, 2018-07-26)
.idea/caches/ (0, 2018-07-26)
.idea/caches/build_file_checksums.ser (540, 2018-07-26)
.idea/checkstyle-idea.xml (610, 2018-07-26)
.idea/codeStyles/ (0, 2018-07-26)
.idea/codeStyles/Project.xml (1775, 2018-07-26)
.idea/gradle.xml (626, 2018-07-26)
.idea/inspectionProfiles/ (0, 2018-07-26)
.idea/inspectionProfiles/Project_Default.xml (1444, 2018-07-26)
.idea/misc.xml (1707, 2018-07-26)
.idea/runConfigurations.xml (564, 2018-07-26)
app/ (0, 2018-07-26)
app/build.gradle (856, 2018-07-26)
app/proguard-rules.pro (751, 2018-07-26)
app/src/ (0, 2018-07-26)
app/src/androidTest/ (0, 2018-07-26)
app/src/androidTest/java/ (0, 2018-07-26)
app/src/androidTest/java/com/ (0, 2018-07-26)
app/src/androidTest/java/com/yexiuliang/ (0, 2018-07-26)
app/src/androidTest/java/com/yexiuliang/recyclerviewtablayout/ (0, 2018-07-26)
app/src/androidTest/java/com/yexiuliang/recyclerviewtablayout/ExampleInstrumentedTest.java (756, 2018-07-26)
app/src/main/ (0, 2018-07-26)
app/src/main/AndroidManifest.xml (734, 2018-07-26)
app/src/main/java/ (0, 2018-07-26)
app/src/main/java/com/ (0, 2018-07-26)
app/src/main/java/com/yexiuliang/ (0, 2018-07-26)
app/src/main/java/com/yexiuliang/recyclerviewtablayout/ (0, 2018-07-26)
app/src/main/java/com/yexiuliang/recyclerviewtablayout/DemoAdapter.java (737, 2018-07-26)
app/src/main/java/com/yexiuliang/recyclerviewtablayout/FixAppBarLayoutBehavior.java (1809, 2018-07-26)
app/src/main/java/com/yexiuliang/recyclerviewtablayout/Item.java (441, 2018-07-26)
app/src/main/java/com/yexiuliang/recyclerviewtablayout/MainActivity.java (11529, 2018-07-26)
app/src/main/res/ (0, 2018-07-26)
app/src/main/res/drawable-v24/ (0, 2018-07-26)
app/src/main/res/drawable-v24/ic_launcher_foreground.xml (1897, 2018-07-26)
app/src/main/res/drawable/ (0, 2018-07-26)
app/src/main/res/drawable/ic_launcher_background.xml (5577, 2018-07-26)
app/src/main/res/layout/ (0, 2018-07-26)
... ...

# RecyclerViewTabLayout  - 页面布局，采用CoordinatorLayout嵌套Recyclerview,TabLayout吸顶。和支付宝页面类似 - 内容区域采取嵌套Recyclerview的方式，复用同一个ViewPool ##### 仿支付宝“全部应用”模块，联动布局 1. 解决scrollToPositionWithOffset没有滚动动画的问题 2. 解决偶现点击TabLayout RecyclerView不滚动的问题 3. RecyclerView滑动过程TabLayout平滑滚动动画 4. 动态计算最后一个item空白高度 #### TabLayout平滑滚动动画 ``` LinearLayoutManager layoutManager =(LinearLayoutManager)recyclerView.getLayoutManager(); Tab tabAt = mTabLayout.getTabAt(layoutManager.findFirstVisibleItemPosition()); if (tabAt != null && !tabAt.isSelected()) { tabAt.select(); } ``` TabLayout点击item是有动画， mTabLayout.setScrollPosition() 这个方法没有动画。 #### scrollToPositionWithOffset没有滚动动画的问题 //平滑移动但是，只要那一项现在看得到了，那它就罢工了 mRecyclerView.smoothScrollToPosition(position); //直接requestLayout，没有动画 mLinearLayoutManager.scrollToPositionWithOffset(position, 0); 解决办法 使用 SmoothScroller 移动到指定位置 1. 创建SmoothScroller RecyclerView.SmoothScroller mSmoothScroller = new LinearSmoothScroller(context) { @Override protected int getVerticalSnapPreference() { return LinearSmoothScroller.SNAP_TO_START; } }; 2. 移动到想要的位置 mSmoothScroller.setTargetPosition(position); mLinearLayoutManager.startSmoothScroll(mSmoothScroller); #### 动态计算最后一个空白item高度 ``` @Override public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { if (viewType == VIEW_TYPE_ITEM) { final View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.demo_item, parent, false); return new ItemViewHolder(view); } else { //Footer是最后留白的位置，以便最后一个item能够出发tab的切换 View view = new View(parent.getContext()); Log.e("footer", "parentHeight: " + mRecyclerViewHeight + "--" + "itemHeight: " + itemHeight); view.setLayoutParams( new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, mRecyclerViewHeight - itemHeight)); return new FooterViewHolder(view); } } @Override public void onBindViewHolder(RecyclerView.ViewHolder holder, final int position) { if (holder.getItemViewType() == VIEW_TYPE_ITEM) { final ItemViewHolder itemViewHolder = (ItemViewHolder) holder; itemViewHolder.mTitle.setText(mData.get(position).name); RecyclerView recyclerView = itemViewHolder.mRecyclerView; recyclerView.setRecycledViewPool(mRecycledViewPool); recyclerView.setHasFixedSize(false); recyclerView.setNestedScrollingEnabled(false); recyclerView.setLayoutManager(new LinearLayoutManager(recyclerView.getContext()) { @Override public boolean canScrollVertically() { return false; } @Override public void onLayoutCompleted(State state) { super.onLayoutCompleted(state); // 由于内部采取的Recyclerview嵌套的方式。直接post获取高度不准确。 mRecyclerViewHeight = mRecyclerView.getHeight(); itemHeight = itemViewHolder.itemView.getHeight(); Log.e("onLayoutCompleted", "itemHeight: " + itemHeight + "--" + position); } }); DemoAdapter demoAdapter = new DemoAdapter(mData.get(position).mSubItems); recyclerView.setAdapter(demoAdapter); } } ``` #### 解决偶现点击TabLayout RecyclerView不滚动的问题 加入FixAppBarLayoutBehavior解决问题

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