安卓学习笔记【一】ListView使用

package com.nguhyw.listview;

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.TextView;

import java.lang.reflect.Array;

public class MainActivity extends AppCompatActivity {

    ListView lv_ListView;
    TextView tv_List;
    String[] str = {"周星驰","吴孟达","江泽民","胡锦涛","黄英文","可口可乐","Nguhyw","Kathy","林正英","降龙十八掌"};


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        lv_ListView = (ListView)findViewById(R.id.lv_listview);
        tv_List = (TextView)findViewById(R.id.tvList);

        Set_ListView();

        ArrayAdapter<String> List = new ArrayAdapter<String>(this,android.R.layout.simple_expandable_list_item_1,str);

        lv_ListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

                tv_List.setText("position="+position+"\nid="+id+"\n你选择了："+str[position]);
            }
        });

    }


    public void Set_ListView(){

        ArrayAdapter<String> List = new ArrayAdapter<String>(this,android.R.layout.simple_expandable_list_item_1,str);
        lv_ListView.setAdapter(List);
    }
}

xml文件:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android=""
    xmlns:tools="" android:layout_width="match_parent"
    android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:background="#7adbe4"
    android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity">

    <LinearLayout
        android:orientation="vertical"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentTop="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textAppearance="?android:attr/textAppearanceLarge"
            android:text="List View"
            android:id="@+id/tvList" />

        <ListView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:scrollbarSize="10dp"

            android:id="@+id/lv_listview" />

    </LinearLayout>
</RelativeLayout>

附上源码：