Recyclerview的使用 是代替了Listview和Gridview

compile 'com.android.support:recyclerview-v7:23.4.0'

public class MainActivity extends AppCompatActivity {
private RecyclerView rv;
private ArrayList<String> arr;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
rv=(RecyclerView)findViewById(R.id.rv);
arr=new ArrayList<>();
for (int i = 0; i <10 ; i++) {
arr.add("我是"+i);
}
//        LinearLayoutManager sta = new LinearLayoutManager(this,LinearLayoutManager.VERTICAL,false);
//        rv.setLayoutManager(sta);
StaggeredGridLayoutManager st=new StaggeredGridLayoutManager(3,StaggeredGridLayoutManager.VERTICAL);
//设置固定大小
rv.setHasFixedSize(true);
rv.setLayoutManager(st);
spq sp = new spq(arr, this, rv);
rv.setAdapter(sp);
}
}

RecyclerView.Adapter	可以托管数据集合，为每一项Item创建视图并且绑定数据
RecyclerView.ViewHolder	承载Item视图的子布局
RecyclerView.LayoutManager	负责Item视图的布局的显示管理
RecyclerView.ItemDecoration	给每一项Item视图添加子View,例如可以进行画分隔线之类的
RecyclerView.ItemAnimator	负责处理数据添加或者删除时候的动画效果

public class spq extends RecyclerView.Adapter<spq.ViewHolder> {
private Context co;
private ArrayList<String> arr;
private RecyclerView rv;

public spq(Context co, ArrayList<String> arr, RecyclerView rv) {
this.co = co;
this.arr = arr;
this.rv = rv;
}

@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
//想要item文字居中必须这样写
View inflate = LayoutInflater.from(parent.getContext()).inflate(R.layout.buju, parent, false);
return new ViewHolder(inflate);
}

@Override
public void onBindViewHolder(ViewHolder holder, int position) {
holder.tv.setText(arr.get(position));
}

@Override
public int getItemCount() {
return arr.size();
}

public class ViewHolder extends RecyclerView.ViewHolder {
TextView tv;
public ViewHolder(View itemView) {
super(itemView);
tv=itemView.findViewById(R.id.tv);
itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
int childAdapterPosition = rv.getChildAdapterPosition(view);
Toast.makeText(co,arr.get(childAdapterPosition), Toast.LENGTH_SHORT).show();
}
});
}
}
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="comqq.example.hasee.myapplication.MainActivity"
android:orientation="vertical">

<android.support.v7.widget.RecyclerView
android:id="@+id/rv"
android:layout_width="match_parent"
android:layout_height="match_parent">
</android.support.v7.widget.RecyclerView>

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">

<TextView
android:id="@+id/tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />

</LinearLayout>