<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"  xmlns:tools="http://schemas.android.com/tools"  android:layout_width="match_parent"  android:layout_height="match_parent"  tools:context=".MainActivity">  <android.support.v7.widget.RecyclerView    android:id="@+id/recyclerView"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:overScrollMode="never" /></RelativeLayout>

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"  xmlns:app="http://schemas.android.com/apk/res-auto"  android:layout_width="match_parent"  android:layout_height="wrap_content"  android:paddingLeft="8dp"  android:paddingRight="8dp"  android:paddingTop="8dp">  <TextView    android:id="@+id/item_timeline_time"    android:layout_height="wrap_content"    android:layout_width="wrap_content"    android:layout_marginRight="8dp"    android:layout_marginTop="18dp"    android:gravity="center_horizontal"    android:padding="4dp"    android:textColor="@color/colorAccent"    android:textSize="16sp"    android:text="2015-06-08/n09:56"    />  <RelativeLayout    android:id="@+id/item_timeline_icon_layout"    android:layout_width="48dp"    android:layout_height="48dp"    android:layout_marginBottom="4dp"    android:layout_marginRight="8dp"    android:layout_toRightOf="@id/item_timeline_time">    <com.timelinedemo.CircleImageView      android:id="@+id/item_timeline_icon_bg"      android:layout_width="match_parent"      android:layout_height="match_parent"      android:src="@android:color/transparent"      app:civ_border_width="4dp" />    <ImageView      android:id="@+id/item_timeline_icon"      android:layout_width="24dp"      android:layout_height="24dp"      android:layout_centerInParent="true"      android:scaleType="fitCenter" />  </RelativeLayout>  <TextView    android:id="@+id/item_timeline_content"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:layout_marginTop="18dp"    android:layout_toRightOf="@id/item_timeline_icon_layout"    android:text="今日收入"    android:textColor="@color/colorPrimary"    android:textSize="15sp" />  <TextView    android:id="@+id/item_timeline_money"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:layout_below="@id/item_timeline_content"    android:layout_marginTop="8dp"    android:layout_toRightOf="@id/item_timeline_icon_layout"    android:text="$ 100"    android:textColor="@color/colorPrimary"    android:textSize="22sp" />  <View    android:id="@+id/item_timeline_view"    android:layout_width="2dp"    android:layout_height="60dp"    android:layout_alignLeft="@id/item_timeline_icon_layout"    android:layout_below="@id/item_timeline_icon_layout"    android:layout_marginLeft="23dp"    android:background="@color/colorAccent" /></RelativeLayout>

public class MainActivity extends AppCompatActivity {  private RecyclerView recyclerView;  @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    initLayout();  }  private void initLayout(){    recyclerView= (RecyclerView) findViewById(R.id.recyclerView);    recyclerView.setLayoutManager(new LinearLayoutManager(this));    recyclerView.setHasFixedSize(true);    recyclerView.setItemAnimator(new DefaultItemAnimator());    initData();  }  private void initData(){    List<TimeInfo > list=new ArrayList<>();    for(int i=0;i<15;i++){      list.add(new TimeInfo());    }    TimelineAdapter mAdapter = new TimelineAdapter(this, list);    recyclerView.setAdapter(mAdapter);  }}