今天写了个demo,发现了很多问题。。
小小的RecyclerView也不是那么好用的。。
Java代码:
public class MainActivity extends AppCompatActivity {
private RecyclerView rv;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// rv = new RecyclerView(this);
// setContentView(rv);
setContentView(R.layout.activity_main);
rv=(RecyclerView) findViewById(R.id.recycler);
/**
* 无论是new RecyclerView对象还是使用XML布局,都要用布局管理器。
* 如下代码,不使用管理器就不显示数据
*/
// rv.setLayoutManager(new LinearLayoutManager(this));
//第二项是滚动方向,第三项是是否反转,就是是不是从右到左。
rv.setLayoutManager(new LinearLayoutManager(this,LinearLayoutManager.HORIZONTAL,false));
rv.setAdapter(new MyAdapter());
}
}
XML布局:
<?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="com.qihao.day621.MainActivity">
<android.support.v7.widget.RecyclerView
android:id="@+id/recycler"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</RelativeLayout>
适配器adapter:
/**
* Created by qihao on 2016/6/21.
*/
public class MyAdapter extends RecyclerView.Adapter {
class viewHolder extends RecyclerView.ViewHolder {
private View root;
private TextView title ,text;
public viewHolder(View root) {
super(root);
title=(TextView) root.findViewById(R.id.title_view);
text=(TextView) root.findViewById(R.id.text_cont);
}
public TextView getText() {
return text;
}
public TextView getTitle() {
return title;
}
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
return new viewHolder(LayoutInflater.from(parent.getContext()).inflate(R.layout.item_view,null));
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
viewHolder vh = (viewHolder) holder;
vh.getText().setText("内容"+position);
vh.getTitle().setText("标题"+position);
}
@Override
public int getItemCount() {
return 30;
}
//private String[] data = new String[]{"111", "222", "3333"};
}
item布局:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="@+id/title_view"
android:textSize="20sp"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<TextView
android:id="@+id/text_cont"
android:textSize="14sp"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
demo源码下载:http://download.csdn.net/detail/gfg156196/9555621