RecycleView使用#

1.新建RecycleViewTest项目：#

2.添加RecycleView库依赖#

鼠标右击选择 " Open Module Settings "选项，然后进行如下操作：

3.创建RecycleView Item布局文件#

• layout/recycleview_item.xml

<?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="wrap_content"
    android:layout_margin="10dp"
    android:orientation="horizontal">

    <ImageView
        android:id="@+id/imageView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        tools:srcCompat="@tools:sample/avatars[1]" />

    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="30dp"
        android:layout_marginTop="40dp"
        android:fontFamily="sans-serif-black"
        android:text="TextView"
        android:textSize="25sp" />

</LinearLayout>

4.在layout/activity_main.xml中添加RecycleView组件#

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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/recycleview"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:listitem="@layout/recycleview_item" />

</androidx.constraintlayout.widget.ConstraintLayout>

5.创建Adapter#

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {

    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.recycleview_item,parent,false);
        return new ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {

        holder.icon.setImageResource(R.drawable.ic_launcher_foreground);
        holder.content.setText("Hello it is a test!");

    }

    @Override
    public int getItemCount() {
        return 1024;
    }

    public class ViewHolder extends RecyclerView.ViewHolder{

        private ImageView icon;
        private TextView content;

        public ViewHolder(@NonNull View itemView) {
            super(itemView);

            icon = itemView.findViewById(R.id.imageView2);
            content = itemView.findViewById(R.id.textView2);

        }
    }


}

6.在Activity中使用RecycleView组件#

public class MainActivity extends AppCompatActivity {

    private RecyclerView recyclerView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        recyclerView = findViewById(R.id.recycleview);

        MyAdapter myAdapter = new MyAdapter();

        recyclerView.setLayoutManager(new LinearLayoutManager(this));

        recyclerView.setAdapter(myAdapter);

    }
}