它们的定义dialog

（1）你需要准备自己的自定义对话框样式，是一个布局文件

<?xml version="1.0" encoding="utf-8"?
>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:background="@drawable/dialog_bg"
    android:gravity="center_vertical|center_horizontal"
    android:orientation="vertical" >

    <RelativeLayout
        android:layout_width="321dp"
        android:layout_height="wrap_content"
        android:layout_weight="7.45"
        android:paddingLeft="30dip"
        android:paddingTop="10dip" >

        <ImageView
            android:id="@+id/dialog_title_image"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentLeft="true"
            android:background="@drawable/dialog_title_image" />

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerInParent="true"
            android:layout_marginLeft="10dip"
            android:layout_toRightOf="@id/dialog_title_image"
            android:text="Title"
            android:textColor="#000000"
            android:textSize="30sp" />
    </RelativeLayout>

    <TextView
        android:layout_width="270dp"
        android:layout_height="1dip"
        android:layout_marginTop="5dip"
        android:background="@drawable/lins" />

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="30dip"
        android:layout_marginTop="10dip"
        android:text="This is a custom dialog"
        android:textColor="#000000" />

    <RelativeLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_weight="3.64"
        android:gravity="bottom|center_horizontal"
        android:paddingBottom="10dip"
        android:paddingTop="10dip" >

        <Button
            android:id="@+id/dialog_button_cancel"
            android:layout_width="100dip"
            android:layout_height="wrap_content"
            android:layout_alignParentLeft="true"
            android:layout_marginLeft="16dp"
            android:background="@drawable/btn_input_completed_normal"
            android:text="取消" />

        <Button
            android:id="@+id/dialog_button_ok"
            android:layout_width="100dip"
            android:layout_height="wrap_content"
            android:layout_alignBaseline="@+id/dialog_button_cancel"
            android:layout_alignBottom="@+id/dialog_button_cancel"
            android:layout_marginLeft="48dp"
            android:layout_toRightOf="@+id/dialog_button_cancel"
            android:text="确定" />
    </RelativeLayout>

</LinearLayout>

该布局文件图片

（2）接下来要写一个自己定义的dialog类。载入上面的布局文件

package com.example.zidingyidialog;

import android.app.Dialog;
import android.content.Context;
import android.os.Bundle;

public class mydialog extends Dialog {

    Context context;
    public mydialog(Context context) {
        super(context);
        // TODO Auto-generated constructor stub
        this.context = context;
    }
    public mydialog(Context context, int theme){
        super(context, theme);
        this.context = context;
    }
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        this.setContentView(R.layout.dialog);
    }

}

（3）接下来写怎样出发该自己定义对话框，以及怎样对对话框上的button进行监听，以便作出响应

package com.example.zidingyidialog;

import android.app.Activity;
import android.app.Dialog;
import android.content.DialogInterface;
import android.content.DialogInterface.OnShowListener;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends  Activity {
    /** Called when the activity is first created. */
   
    
   private  Dialog  dialog ;
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Button button = (Button) findViewById(R.id.button1);
        button.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                
                //初始化一个自己定义的Dialog
                 dialog = new mydialog(MainActivity.this,
                        R.style.MyDialog);

                dialog.show();
               Button  button = (Button) dialog.findViewById(R.id.dialog_button_ok);
               
				
				button.setOnClickListener(l);
				
Button  butto = (Button) dialog.findViewById(R.id.dialog_button_cancel);
               
				
				
				butto.setOnClickListener(l1);
				;
            }
        });

    }
    OnClickListener l = new OnClickListener() {
		
		@Override
		public void onClick(View v) {
			dialog.dismiss();
			
		}
	};
	
	OnClickListener l1 =new OnClickListener() {
		
		@Override
		public void onClick(View v) {
			Toast.makeText(MainActivity.this, "hhahha", Toast.LENGTH_SHORT).show();
			
		}
	}; ;
  
}

还有基本的就是在values下的styles中加入例如以下内容，便于控制对话框的格式

</style>

       <style name="MyDialog" parent="@android:Theme.Dialog">
        <item name="android:windowFrame">@null</item>
        <item name="android:windowNoTitle">true</item> 
        <item name="android:windowBackground">@drawable/dialog_bg</item>
        <item name="android:windowIsFloating">true</item>
        <item name="android:windowContentOverlay">@null</item>
    </style>

以上就是加入自己定义对话框的基本步骤