【鼠】安卓学习杂记（二十三）——Android之Adapter之ArrayAdapter(数组适配器——无需写布局文件)

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <ListView
        android:id="@+id/lv1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
    </ListView>

</LinearLayout>

package com.example.administrator.app_adapter;

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;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //初始化ListView
        ListView lv1 = findViewById(R.id.lv1);
        //创建数据源
        final String data[] = {"数据1","数据2","数据3","数据4","数据5"};
        //将数据装入适配器；参数1：上下文（当前Activity）；参数2：样式；参数3：数据源；
        ArrayAdapter arrayAdapter = new ArrayAdapter<>(this,
                android.R.layout.simple_list_item_1,data);
        //为ListView添加适配器
        lv1.setAdapter(arrayAdapter);
        //为每个按钮添加点击事件
        lv1.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                //点击事件
                Toast.makeText(MainActivity.this, data[position], Toast.LENGTH_SHORT).show();
            }
        });
    }
}