activity_main:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/rec"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</LinearLayout>
recyclerview_row:
<?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="100dp"
android:orientation="horizontal"
android:padding="10dp">
<TextView
android:id="@+id/animalText"
android:layout_width="wrap_content"
android:layout_height="50dp"
android:textSize="20sp"/>
</LinearLayout>
MyRecyclerViewAdapter:
public class MyRecyclerViewAdapter extends RecyclerView.Adapter<MyRecyclerViewAdapter.ViewHolder> {
private List<String> mDataList;
private LayoutInflater mInflater;
// context跟arrayList就是透过这个传进来
MyRecyclerViewAdapter(Context context, List<String> data) {
this.mInflater = LayoutInflater.from(context);
this.mDataList = data;
}
// 用inflater载入recyclerview_row,并传入viewHolder
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = mInflater.inflate(R.layout.recyclerview_row, parent, false);
return new ViewHolder(view);
}
// 寻找textView的Id
public class ViewHolder extends RecyclerView.ViewHolder {
TextView animalText;
ViewHolder(View itemView) {
super(itemView);
animalText = itemView.findViewById(R.id.animalText);
}
}
// 用viewHolder绑定资料
// position是mDataList的第几个
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
String s = mDataList.get(position);
holder.animalText.setText(s);
}
// 确定mDataList有几个
@Override
public int getItemCount() {
return mDataList.size();
}
}
MainActivity:
public class MainActivity extends AppCompatActivity {
MyRecyclerViewAdapter adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// 要传入recycleView的资料
String[] animal = {"cat","dog","horse","sheep"};
ArrayList<String> arrayList = new ArrayList<>();
for (String str:animal) {
arrayList.add(str);
}
// 先用ID寻找哪个是你recycleView的ID
RecyclerView rec = findViewById(R.id.rec);
//设定排序用LinearLayout的排法
rec.setLayoutManager(new LinearLayoutManager(this));
//this是你现在在哪个activity(context)
//arrayList长度是4,画面就会显示4个recyclerview_row.xml
adapter = new MyRecyclerViewAdapter(this, arrayList);
//接下来设定recyclview要绑上的是刚宣告的adapter,adapter的作用是处理那4笔资料该如何显示
rec.setAdapter(adapter);
}
}
谢谢大家愿意花时间阅读,小弟弟我在此鞠躬
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