创建一个布局文件 my_dialog.xml

下面是strings.xml文件：

xml version="1.0" encoding="utf-8"?> <resources> <string name="app_name">demo091801</string> <string name="action_settings">Settings</string> <string name="hello_world">Hello world!</string> <string name="MyDialog">自己定义对话框</string> <string name="textView1">username</string> <string name="textView2">password</string> </resources>

在主activity_main.xml中加入一个button控件，当单击此button时即弹出自己定义的对话框：

在MainActivity.java代码中为button控件设置单击事件监听，并弹出自己定义的对话框：

MainActivity.java:

package com.example.demo091801;import android.os.Bundle;import android.app.Activity;import android.app.AlertDialog;import android.content.DialogInterface;import android.view.LayoutInflater;import android.view.Menu;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;public class MainActivity extends Activity {	@Override	protected void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		setContentView(R.layout.activity_main);				Button btn1 = (Button)findViewById(R.id.My_Dialog);				btn1.setOnClickListener(new OnClickListener()		{			@Override			public void onClick(View arg0) {				// TODO Auto-generated method stub												AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);				LayoutInflater inflater = getLayoutInflater();				View view = inflater.inflate(R.layout.my_dialog, null);								builder.setTitle("登陆");				builder.setView(view);				builder.setPositiveButton("登陆", new DialogInterface.OnClickListener() {										@Override					public void onClick(DialogInterface arg0, int arg1) {						// TODO Auto-generated method stub											}				});								builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {										@Override					public void onClick(DialogInterface arg0, int arg1) {						// TODO Auto-generated method stub											}				});																								AlertDialog dialog = builder.create();				dialog.show();							}		}				);					}	@Override	public boolean onCreateOptionsMenu(Menu menu) {		// Inflate the menu; this adds items to the action bar if it is present.		getMenuInflater().inflate(R.menu.main, menu);		return true;	}}

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