ListView的使用

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">
    <TextView
        android:id="@+id/t1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textColor="@android:color/black"
        android:textSize="30dp"
        android:text="MenuDemo"/>
    <ListView
        android:layout_marginLeft="10dp"
        android:id="@+id/l1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"></ListView>

</LinearLayout>

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        final TextView textView=(TextView)findViewById(R.id.t1);
        ListView listView=(ListView)findViewById(R.id.l1 );
        List<String>list=new ArrayList<String>();
        list.add("移动计算");
        list.add("计算机组成原理");
        list.add("数据结构");
        list.add("操作系统");
        list.add("面向对象技术");
        list.add("逻辑设计");
        final ArrayAdapter<String>adapter=new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,list);
        listView.setAdapter(adapter);
        AdapterView.OnItemClickListener listViewListener =new
                AdapterView.OnItemClickListener() {
                    @Override
                    public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {//i表示子项的位置,l表示子项的行号
                        String mag=adapter.getItem(i);
                        textView.setText(mag);
                    }
                };
        listView.setOnItemClickListener(listViewListener);
    }
}