package com.example.simple;import android.app.Activity;import android.app.AlertDialog;import android.app.Dialog;import android.content.DialogInterface;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.Toast;public class MainActivity extends Activity implementsandroid.view.View.OnClickListener,        android.content.DialogInterface.OnClickListener {    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        Button btnOneButton = (Button) findViewById(R.id.btnCalc);        Button btnCancle = (Button) findViewById(R.id.btnCancel);　　　　 // 写法一        btnOneButton.setOnClickListener(this);// 注册按钮单击事件 　　　　 // 写法二        btnCancle.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                Dialog dialog = new AlertDialog.Builder(MainActivity.this)                        .setTitle("提醒你")                        .setMessage("你当前选中的是取消按钮")                        .setPositiveButton("确定",                                new DialogInterface.OnClickListener() {                                    @Override                                    public void onClick(DialogInterface dialog,                                            int which) {                                        Toast.makeText(MainActivity.this,                                                "你单击了确定按钮！", Toast.LENGTH_LONG)                                                .show();                                        dialog.cancel();                                    }                                })                        .setNegativeButton("取消",                                new DialogInterface.OnClickListener() {                                    @Override                                    public void onClick(DialogInterface dialog,                                            int which) {                                        Toast.makeText(MainActivity.this,                                                "你单击了取消按钮！", Toast.LENGTH_LONG)                                                .show();                                        dialog.cancel();                                    }                                }).create();                dialog.show();            }        });    }    // 按钮单击事件    @Override    public void onClick(View v) {        // 以下创建带一个按钮的对话框对象并显示该对话框        new AlertDialog.Builder(this)// .setIcon(R.drawable.icon)                .setTitle("带一个按钮的对话框")                .setMessage("这是带一个按钮的对话框")                .setPositiveButton("确定", this)                .show();    }     // 对话框按钮单击事件    @Override    public void onClick(DialogInterface dialog, int which) {        Toast.makeText(MainActivity.this, "您点击了确定", 3000).show();    }}