05-17 列表视图

1.AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.administrator.testapp">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity" />
        <activity android:name=".test_activity6"></activity>
        <activity android:name=".TestActivity7">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name=".TestActivity8"></activity>
    </application>

</manifest>

2.activity_test7.xml

【列表视图布局文件】

<?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"
    tools:context=".TestActivity7"
    android:orientation="vertical">

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

3.列表视图代码运行程序

package com.example.administrator.testapp;

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

public class TestActivity7 extends AppCompatActivity {

    ListView lv_1;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_test7);

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

        //1-1.数据集合 layout文件
        String [] strings = {"A1","A2","A3","A4","A5","A6","A7","A8","A9","A10",
                "A11","A12","A13","A14","A15","A16","A17","A18","A19","A20"};
        //1-2.创建适配器 AdaPter
        ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(this, R.layout.array_adapter,strings);
        //1-3.绑定到ListView
        lv_1.setAdapter(arrayAdapter);
    }
}

4.array_adapter.xml

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