AlertDialog對話框

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.zdsoft.dialog1130.MainActivity">

    <Button
        android:id="@+id/bt_show"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="顯示對話框" />
</RelativeLayout>

package com.zdsoft.dialog1130;

import android.content.DialogInterface;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
    private Button bt_show;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
        bt_show.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
                builder.setIcon(R.mipmap.ic_launcher);
                builder.setPositiveButton("確定", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        Toast.makeText(MainActivity.this, "確定刪除", Toast.LENGTH_SHORT).show();
                    }
                });
                builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        Toast.makeText(MainActivity.this, "取消刪除", Toast.LENGTH_SHORT).show();
                    }
                });
                builder.setNeutralButton("查詢詳情", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        Toast.makeText(MainActivity.this, "查看詳情內容", Toast.LENGTH_SHORT).show();
                    }
                });
                AlertDialog dialog = builder.create();
                dialog.setTitle("確定刪除嗎!");
                dialog.setMessage("刪除此消息嗎？");
                dialog.show();
            }
        });
    }

    private void initView() {
        bt_show = (Button) findViewById(R.id.bt_show);

    }
}