<?xml version="1.0" encoding="utf-8"?>

<ListView 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:id="@+id/lv_1"

    android:divider="#f0f"

    android:dividerHeight="2dp"

    >

</ListView>

package com.hanqi.application3;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.view.View;

import android.widget.AdapterView;

import android.widget.ArrayAdapter;

import android.widget.ListView;

import android.widget.Toast;

import java.util.ArrayList;

import java.util.List;

public class UI3Activity extends AppCompatActivity {

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_ui3);

        ListView lv_1 = (ListView)findViewById(R.id.lv_1);

        //设置ListView 的Adapter

        //准备数据

        //String[] lv_str={"A","B","C","D","E","F","G","H","I","G","K","L","M","N"};

        List<String> lv_list= new ArrayList<String>();

        lv_list.add("A");

        lv_list.add("B");

        lv_list.add("C");

        lv_list.add("D");

        lv_list.add("E");

        lv_list.add("F");

        lv_list.add("G");

        //构造适配器

        ArrayAdapter aa_1 = new ArrayAdapter(this,R.layout.layout_array,lv_list);

        lv_1.setOnItemClickListener(new AdapterView.OnItemClickListener() {

            // 集合parent  普通视图View view   下标position  数据Item

            @Override

            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

                String srt1= parent.getItemAtPosition(position).toString();

                Toast.makeText(UI3Activity.this, "position"+position+"srt1"+srt1, Toast.LENGTH_SHORT).show();

            }

        });

        //设置适配器

        lv_1.setAdapter(aa_1);

    }

}

<?xml version="1.0" encoding="utf-8"?>

<TextView xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="50dp"

    android:textSize="30sp"

    android:gravity="center_vertical"

    android:paddingLeft="10dp">

</TextView>