将替代ListView的RecyclerView 的使用详解(一)

android { 
compileSdkVersion 'android-L' 
buildToolsVersion "20.0.0" 
defaultConfig { 
minSdkVersion 'L' 
targetSdkVersion 'L' 
... 
} 
... 
} 
dependencies { 
compile 'com.android.support:recyclerview-v7:+' 
... 
}

<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=".MyActivity" > 
<android.support.v7.widget.RecyclerView 
android:id="@+id/recyclerView" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
android:scrollbars="vertical" /> 
</RelativeLayout> 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
super.onCreate(savedInstanceState); 
setContentView(R.layout.activity_my); 
RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recyclerView); 
// 创建一个线性布局管理器 
LinearLayoutManager layoutManager = new LinearLayoutManager(this); 
// 设置布局管理器 
recyclerView.setLayoutManager(layoutManager); 
// 创建数据集 
String[] dataset = new String[100]; 
for (int i = 0; i < dataset.length; i++){ 
dataset = "item" + i; 
} 
// 创建Adapter，并指定数据集 
MyAdapter adapter = new MyAdapter(dataset); 
// 设置Adapter 
recyclerView.setAdapter(adapter); 
} 

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> 
{ 
// 数据集 
private String[] mDataset; 
public MyAdapter(String[] dataset) 
{ 
super(); 
mDataset = dataset; 
} 
@Override 
public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) 
{ 
// 创建一个View，简单起见直接使用系统提供的布局，就是一个TextView 
View view = View.inflate(viewGroup.getContext(), android.R.layout.simple_list_item_1, null); 
// 创建一个ViewHolder 
ViewHolder holder = new ViewHolder(view); 
return holder; 
} 
@Override 
public void onBindViewHolder(ViewHolder viewHolder, int i) 
{ 
// 绑定数据到ViewHolder上 
viewHolder.mTextView.setText(mDataset); 
} 
@Override 
public int getItemCount() 
{ 
return mDataset.length; 
} 
public static class ViewHolder extends RecyclerView.ViewHolder 
{ 
public TextView mTextView; 
public ViewHolder(View itemView) 
{ 
super(itemView); 
mTextView = (TextView) itemView; 
} 
} 
}