Android Alertdialog（实现警告对话框）

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:orientation="vertical" android:layout_width="match_parent"  android:layout_height="match_parent">  <Button    android:text="卸载"    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:onClick="show"    android:id="@+id/button" /></LinearLayout>

import android.content.DialogInterface;import android.os.Bundle;import android.support.annotation.Nullable;import android.support.v7.app.AlertDialog;import android.support.v7.app.AppCompatActivity;import android.view.View;import android.widget.Toast;/** * Created by panchengjia on 2016/11/21. */public class AlertDialogDemo extends AppCompatActivity {  @Override  protected void onCreate(@Nullable Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.alterdialog);  }  public void show(View v){    //实例化建造者    AlertDialog.Builder builder = new AlertDialog.Builder(this);    //设置警告对话框的标题    builder.setTitle("卸载");    //设置警告显示的图片//    builder.setIcon(android.R.drawable.ic_dialog_alert);    //设置警告对话框的提示信息    builder.setMessage("确定卸载吗");    //设置”正面”按钮，及点击事件    builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {      @Override      public void onClick(DialogInterface dialog, int which) {        Toast.makeText(AlertDialogDemo.this,"点击了确定按钮",Toast.LENGTH_SHORT).show();      }    });    //设置“反面”按钮，及点击事件    builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {      @Override      public void onClick(DialogInterface dialog, int which) {        Toast.makeText(AlertDialogDemo.this,"点击了取消按钮",Toast.LENGTH_SHORT).show();      }    });    //设置“中立”按钮，及点击事件    builder.setNeutralButton("等等看吧", new DialogInterface.OnClickListener() {      @Override      public void onClick(DialogInterface dialog, int which) {        Toast.makeText(AlertDialogDemo.this,"点击了中立按钮",Toast.LENGTH_SHORT).show();      }    });    //显示对话框    builder.show();  }}