RecycleView怎么用

这篇文章将为大家详细讲解有关RecycleView怎么用，小编觉得挺实用的，因此分享给大家做个参考，希望大家阅读完这篇文章后可以有所收获。

RecycleView的设计模式是观察者模式，这个以后再深究。

recycleview有三种布局（1）瀑布流StaggeredGridLayoutManager(2)GridLayoutManager（3）Layoutmanager.他们 都有横纵滑动的功能

具体实现：

@Overrideprotected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    initData();    mRecyclerView = (RecyclerView) findViewById(R.id.id_recyclerview);    LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);    linearLayoutManager.setOrientation(LinearLayout.VERTICAL);//设置横纵显示    mRecyclerView.setLayoutManager(linearLayoutManager);    mRecyclerView.setAdapter(mAdapter = new HomeAdapter());    mRecyclerView.addItemDecoration(new MyDecorlation(MainActivity.this, MyDecorlation.VERTICAL_LIST));    mRecyclerView.setItemAnimator(new DefaultItemAnimator());}

HomeAdapter要继承RecycleView.Adapter, 重写oncreatViewHold()，这个方法是用来获取到布局，并设置给Viewhold的，onBindViewHold()是和viewhold进行绑定，通过holder对象获取到oncreatViewHold()布局中的控件。ViewHold类需要继承RecycleView.ViewHold，该类用于获取控件。

HomeAdapter RecyclerView.Adapter{    ViewHold (ViewGroup parentviewType) {        View inflate = LayoutInflater.(MainActivity.).inflate(R.layout.parent)ViewHold viewHold = ViewHold(inflate)viewHold}    (ViewHold holderposition) {        String data = .get(position)holder..setText(data)holder..setOnClickListener(View.OnClickListener() {            (View view) {                Log.(+).remove()notifyItemRemoved()notifyDataSetChanged()}        })}    () {        .size()}    ViewHold RecyclerView.ViewHolder {        TextView (View itemView) {            (itemView)= (TextView) itemView.findViewById(R.id.)}    }}

布局中只有一个textview。

其中动画效果用它默认的效果，分割线需要继承RecycleView.ItemDecoration,并且要重写onDraw()和getitemoffset()方法，横向滑动和纵滑动时，设置分割线有所差别。前一个通过drawable.draw()方法去设置图片显示的具体大小和位置drawable.setBonds();后一个方法是去设置分割线相对于item的显示位置和高度。

MyDecorlation RecyclerView.ItemDecoration{    = LinearLayoutManager.= LinearLayoutManager.[] = []{            android.R.attr.}Drawable (Context contextorientation){        TypedArray a = context.obtainStyledAttributes()= a.getDrawable()a.recycle()setItemdecor(orientation)}    (orientation) {        (orientation != && orientation != ) {            IllegalArgumentException()}        = orientation}    (Canvas cRecyclerView parentRecyclerView.State state) {        .onDraw(cparentstate)(== LinearLayoutManager.){            setHorizontal(cparent)}{            setVertical(cparent)}    }    (Canvas cRecyclerView parent) {        left = parent.getPaddingLeft()right = parent.getWidth() - parent.getPaddingRight()childCount = parent.getChildCount()(i = i < childCounti++) {            View child = parent.getChildAt(i)android.support.v7.widget.RecyclerView v = android.support.v7.widget.RecyclerView(parent.getContext())RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child                    .getLayoutParams()top = child.getBottom() + params.bottom = top + .getIntrinsicHeight().setBounds(lefttoprightbottom).draw(c)}    }    (Canvas cRecyclerView parent) {        top = parent.getPaddingTop()bottom = parent.getHeight() - parent.getPaddingBottom()childCount = parent.getChildCount()(i = i < childCounti++) {            View child = parent.getChildAt(i)RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child                    .getLayoutParams()left = child.getRight() + params.right = left + .getIntrinsicHeight().setBounds(lefttoprightbottom).draw(c)}    }    (Rect outRectView viewRecyclerView parentRecyclerView.State state) {        .getItemOffsets(outRectviewparentstate)(== LinearLayoutManager.){            outRect.set(.getIntrinsicHeight())}{            outRect.set(.getIntrinsicHeight())}    }}

在使用RecycleView的删除和添加item时，使用的是notifyItemInserted(position);和notifyItemRemoved(position)。但是我在使用时，会出现数组越界的问题。原因是adapter并未真正的重新刷新，比如当我点击删除第二个item也就是position为1，然后再点击第二个item，就会看到跳到下一个item去了，其实这时候position为2了。所以解决方法是是在调用notifyItemInserted或notifyItemRemoved后再调用一次notifidatasetchange（）。

关于"RecycleView怎么用"这篇文章就分享到这里了，希望以上内容可以对大家有一定的帮助，使各位可以学到更多知识，如果觉得文章不错，请把它分享出去让更多的人看到。