一、前言 RecyclerView是谷歌V7包下新增的控件,用来替代ListView的使用,在RecyclerView标准化了ViewHolder类似于ListView中convertView用来做视图缓.
先来说说RecyclerView的有点就是,他可以通过设置LayoutManager来快速实现listview、gridview、瀑布流的效果，而且还可以设置横向和纵向显示，添加动画效果也非常简单(自带了ItemAnimation，可以设置加载和移除时的动画，方便做出各种动态浏览的效果),也是官方推荐使用的.以下是官方的说明:
RecyclerView is a more advanced and flexible version of ListView. This widget is a container for large sets of views that can be recycled and scrolled very efficiently. Use the RecyclerView widget when you have lists with elements that change dynamically. 简单说就是当你需要动态展示一组数据的时候就会需要用到它。
讲了这么多虚的，接下来我们看看在代码中怎么来实现.
##二、实现
首先要用这个控件，你需要在gradle文件中添加包的引用（配合官方CardView使用）
[代码]xml代码：
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compile 'com.android.support:cardview-v7:21.0.3'compile 'com.android.support:recyclerview-v7:21.0.3' |
然后是在XML文件用使用它
[代码]xml代码：
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<android.support.v7.widget.recyclerview xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:id="@+id/recycler_view" android:layout_centervertical="true" android:layout_centerhorizontal="true"></android.support.v7.widget.recyclerview>
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接着在Activity中设置它
[代码]java代码：
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public class MainActivity extends ActionBarActivity {
@InjectView(R.id.recycler_view)
RecyclerView mRecyclerView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ButterKnife.inject(this);
mRecyclerView.setLayoutManager(new LinearLayoutManager(this));//这里用线性显示 类似于listview
// mRecyclerView.setLayoutManager(new GridLayoutManager(this, 2));//这里用线性宫格显示 类似于grid view// mRecyclerView.setLayoutManager(new StaggeredGridLayoutManager(2, OrientationHelper.VERTICAL));//这里用线性宫格显示 类似于瀑布流 mRecyclerView.setAdapter(new NormalRecyclerViewAdapter(this));
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
} |
然后是适配器代码
[代码]java代码：
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public class NormalRecyclerViewAdapter extends RecyclerView.Adapter<normalrecyclerviewadapter.normaltextviewholder> {
private final LayoutInflater mLayoutInflater;
private final Context mContext;
private String[] mTitles;
public NormalRecyclerViewAdapter(Context context) {
mTitles = context.getResources().getStringArray(R.array.titles);
mContext = context;
mLayoutInflater = LayoutInflater.from(context);
}
@Override
public NormalTextViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
return new NormalTextViewHolder(mLayoutInflater.inflate(R.layout.item_text, parent, false));
}
@Override
public void onBindViewHolder(NormalTextViewHolder holder, int position) {
holder.mTextView.setText(mTitles[position]);
}
@Override
public int getItemCount() {
return mTitles == null ? 0 : mTitles.length;
}
public static class NormalTextViewHolder extends RecyclerView.ViewHolder {
@InjectView(R.id.text_view)
TextView mTextView;
NormalTextViewHolder(View view) {
super(view);
ButterKnife.inject(this, view);
view.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Log.d("NormalTextViewHolder", "onClick--> position = " + getPosition());
}
});
}
}
}</normalrecyclerviewadapter.normaltextviewholder> |
##三、效果图
LinearLayoutManager样式
GridLayoutManager样式
最后给出代码下载地址–>Demo Code