什么是最简单的方法来显示RecyclerView中的字符串和图标列表？
对于ListView,我使用以下代码(此处为a full project at GitHub),而不使用单独的适配器：
mListView = (ListView) findViewById(R.id.list_view);
mListView.setAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,mPlanets) {
@Override
public View getView(int position,View convertView,ViewGroup parent) {
TextView view = (TextView) super.getView(position,convertView,parent);
view.setCompoundDrawablesWithIntrinsicBounds(R.drawable.ic_stars_black_24dp,0);
return view;
}
});
mListView.setonItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent,View view,int position,long id) {
Toast.makeText(getApplicationContext(),"You have clicked " + mPlanets[position],Toast.LENGTH_LONG).show();
}
});
我想知道如何以类似的简单方式使用ArrayAdapter和android.R.layout.simple_list_item_1和RecyclerView,即没有自定义布局和适配器.
解决方法
伙计这是最简单的方式
>首先在build.gradle文件中添加依赖项
compile 'com.android.support:recyclerview-v7:21.0.+'
>在MainActivity中定义RecyclerView对象
private RecyclerView recyclerView;
private RecyclerView.Adapter adapter;
private RecyclerView.LayoutManager layoutManager;
private ArrayList<String> planetList=new ArrayList();
//Other Stuff
protected void onCreate(Bundle savedInstanceState) {
//Other Stuff and initialize planetList with all the planets name before passing it to adapter
recyclerView = (RecyclerView) findViewById(R.id.recycler_view);
layoutManager = new linearlayoutmanager(this);
recyclerView.setLayoutManager(layoutManager);
adapter = new PlanetAdapter(planetList,getApplicationContext());
recyclerView.setAdapter(adapter);
}
>主要的Buzz杀手PlanetAdapter,您必须定义PlanetAdapter,它扩展了RecyclerView.Adapter
public class PlanetAdapter extends RecyclerView.Adapter<PlanetAdapter.PlanetViewHolder> {
ArrayList<String> planetList;
public PlanetAdapter(ArrayList<String> planetList,Context context) {
this.planetList = planetList;
}
@Override
public PlanetAdapter.PlanetViewHolder onCreateViewHolder(ViewGroup parent,int viewType) {
View v= LayoutInflater.from(parent.getContext()).inflate(R.layout.planet_row,parent,false);
PlanetViewHolder viewHolder=new PlanetViewHolder(v);
return viewHolder;
}
@Override
public void onBindViewHolder(PlanetAdapter.PlanetViewHolder holder,int position) {
holder.image.setimageResource(R.drawable.planetimage);
holder.text.setText(planetList.get(position).toString());
}
@Override
public int getItemCount() {
return planetList.size();
}
public static class PlanetViewHolder extends RecyclerView.ViewHolder{
protected ImageView image;
protected TextView text;
public PlanetViewHolder(View itemView) {
super(itemView);
image= (ImageView) itemView.findViewById(R.id.image_id);
text= (TextView) itemView.findViewById(R.id.text_id);
}
}
}
4.main_activity.xml
<LinearLayout 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">
<android.support.v7.widget.RecyclerView
android:id="@+id/recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</LinearLayout>
>最后但并非最不重要的planet_row.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<ImageView
android:layout_width="40dp"
android:layout_height="40dp"
android:id="@+id/image_id"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Planet Name"
android:id="@+id/text_id"/>
</LinearLayout>