ListView

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:orientation="vertical"
    tools:context="com.example.my.myapplication.TestListView">

    <ListView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/lv_1">

    </ListView>
</LinearLayout>

package com.example.my.myapplication;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.ArrayAdapter;
import android.widget.ListView;

public class TestListView extends AppCompatActivity {

    ListView lv_1;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_test_list_view);
        ListView lv_1=(ListView)findViewById(R.id.lv_1);


        //1.数据集合
        String [] strings={"A1","A2","A3","A4","A5","A6","A7","A8","A9",
                "A1","A2","A3","A4","A5","A6","A7","A8","A9"};
        //2.创建Adapter
        ArrayAdapter<String> arrayAdapter=new ArrayAdapter<String>(this,R.layout.array_adapter,strings);
        //3.绑定到ListView
        lv_1.setAdapter(arrayAdapter);
    }
}

<?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="wrap_content"
    android:textSize="20dp"
    android:paddingTop="10dp"
    android:paddingBottom="10dp"/>