Android实现弹出列表、单选、多选框

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:app="http://schemas.android.com/apk/res-auto"
 xmlns:tools="http://schemas.android.com/tools"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 tools:context="com.example.lyp1020k.lv.MainActivity"
 android:orientation="vertical">
 <Button
 android:id="@+id/button1"
 android:text="列表框"
 android:onClick="showList"
 android:layout_width="match_parent"
 android:layout_height="wrap_content" />
 <Button
 android:id="@+id/button2"
 android:text="单选列表"
 android:onClick="showSingleAlertDialog"
 android:layout_width="match_parent"
 android:layout_height="wrap_content" />
 <Button
 android:id="@+id/button3"
 android:text="多选按钮"
 android:onClick="showMutilAlertDialog"
 android:layout_width="match_parent"
 android:layout_height="wrap_content" />
</LinearLayout>

import android.content.DialogInterface;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
 private AlertDialog alertDialog1; //信息框
 private AlertDialog alertDialog2; //单选框
 private AlertDialog alertDialog3; //多选框
 private Button button1;
 private Button button2;
 private Button button3;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 init();
 }
 public void init(){
 button1 = (Button) findViewById(R.id.button1);
 button2 = (Button) findViewById(R.id.button2);
 button3 = (Button) findViewById(R.id.button3);
 }
 @Override
 public boolean onCreateOptionsMenu(Menu menu) {
 getMenuInflater().inflate(R.menu.mian, menu);
 return true;
 }
 public void showList(View view){
 final String[] items = {"列表1", "列表2", "列表3", "列表4"};
 AlertDialog.Builder alertBuilder = new AlertDialog.Builder(this);
 alertBuilder.setTitle("这是列表框");
 alertBuilder.setItems(items, new DialogInterface.OnClickListener() {
 @Override
 public void onClick(DialogInterface dialogInterface, int i) {
 Toast.makeText(MainActivity.this, items[i], Toast.LENGTH_SHORT).show();
 alertDialog1.dismiss();
 }
 });
 alertDialog1 = alertBuilder.create();
 alertDialog1.show();
 }
 public void showSingleAlertDialog(View view){
 final String[] items = {"单选1", "单选2", "单选3", "单选4"};
 AlertDialog.Builder alertBuilder = new AlertDialog.Builder(this);
 alertBuilder.setTitle("这是单选框");
 alertBuilder.setSingleChoiceItems(items, 0, new DialogInterface.OnClickListener() {
 @Override
 public void onClick(DialogInterface dialogInterface, int i) {
 Toast.makeText(MainActivity.this, items[i], Toast.LENGTH_SHORT).show();
 }
 });
 alertBuilder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
 @Override
 public void onClick(DialogInterface dialogInterface, int i) {
 alertDialog2.dismiss();
 }
 });
 alertBuilder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
 @Override
 public void onClick(DialogInterface dialogInterface, int i) {
 alertDialog2.dismiss();
 }
 });
 alertDialog2 = alertBuilder.create();
 alertDialog2.show();
 }
 public void showMutilAlertDialog(View view){
 final String[] items = {"多选1", "多选2", "多选3", "多选4"};
 AlertDialog.Builder alertBuilder = new AlertDialog.Builder(this);
 alertBuilder.setTitle("这是多选框");
 /**
 *第一个参数:弹出框的消息集合，一般为字符串集合
 * 第二个参数：默认被选中的，布尔类数组
 * 第三个参数：勾选事件监听
 */
 alertBuilder.setMultiChoiceItems(items, null, new DialogInterface.OnMultiChoiceClickListener() {
 @Override
 public void onClick(DialogInterface dialogInterface, int i, boolean isChecked) {
 if (isChecked){
  Toast.makeText(MainActivity.this, "选择" + items[i], Toast.LENGTH_SHORT).show();
 }else {
  Toast.makeText(MainActivity.this, "取消选择" + items[i], Toast.LENGTH_SHORT).show();
 }
 }
 });
 alertBuilder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
 @Override
 public void onClick(DialogInterface dialogInterface, int i) {
 alertDialog3.dismiss();
 }
 });
 alertBuilder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
 @Override
 public void onClick(DialogInterface dialogInterface, int i) {
 alertDialog3.dismiss();
 }
 });
 alertDialog3 = alertBuilder.create();
 alertDialog3.show();
 }
}