先直接给出效果图：

    

思路：

通过Dialog的方式实现AlertDialog， 因为可以在Dialog中通过setContentView(int layoutResID)来指定Dialog的布局及样式（就像Activity中一样）。

所以我们可以自定义各种样式的alertdialog，至于好不好看，那就得看layout写得怎么样了。

其他也没啥好说的，直接上代码：

java代码：

package hi.braincol.example.iphoneAlert;
/* No CONSTRAINTS ! Just use the code under your thoughts !
 * mail me at [email protected]
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*     http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
 import android.app.Activity;
import android.app.Dialog;
import android.os.Bundle;
import android.view.View;
import android.view.Window;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
public class MainScreenActivity extends Activity {
    /** Called when the activity is first created. */
    Button buttonOk,buttonOkCancel;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
                buttonOk = (Button)findViewById(R.id.button1);       
        buttonOk.setOnClickListener(new Button.OnClickListener() { 
            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub
                showCustomMessageOK("Confirmation","Just click OK to continue !"); 
                            }
            });
                buttonOkCancel = (Button)findViewById(R.id.button2);       
        buttonOkCancel.setOnClickListener(new Button.OnClickListener() { 
            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub
                showCustomMessage("Alert","Are you sure you want continue?");    
            }
            });
                    }
        /**
     * it will show the OK/CANCEL dialog like iphone, make sure no keyboard is visible
     * 
     * @param pTitle
     *            title for dialog
     * @param pMsg
     *            msg for body
     */
    private void showCustomMessage(String pTitle, final String pMsg) {
        final Dialog lDialog = new Dialog(MainScreenActivity.this,
                android.R.style.Theme_Translucent_NoTitleBar);
        lDialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
        lDialog.setContentView(R.layout.r_okcanceldialogview);
        ((TextView) lDialog.findViewById(R.id.dialog_title)).setText(pTitle);
        ((TextView) lDialog.findViewById(R.id.dialog_message)).setText(pMsg);
        ((Button) lDialog.findViewById(R.id.ok)).setText("Ok");
        ((Button) lDialog.findViewById(R.id.cancel))
                .setOnClickListener(new OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        // write your code to do things after users clicks CANCEL
                        lDialog.dismiss();
                    }
                });
        ((Button) lDialog.findViewById(R.id.ok))
                .setOnClickListener(new OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        // write your code to do things after users clicks OK
                                             lDialog.dismiss();
                    }
                });
        lDialog.show();
    }
         /**
     * it will show the OK dialog like iphone, make sure no keyboard is visible
     * 
     * @param pTitle
     *            title for dialog
     * @param pMsg
     *            msg for body
     */
    private void showCustomMessageOK(String pTitle, final String pMsg) {
        final Dialog lDialog = new Dialog(MainScreenActivity.this,
                android.R.style.Theme_Translucent_NoTitleBar);
        lDialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
        lDialog.setContentView(R.layout.r_okdialogview);
        ((TextView) lDialog.findViewById(R.id.dialog_title)).setText(pTitle);
        ((TextView) lDialog.findViewById(R.id.dialog_message)).setText(pMsg);
        ((Button) lDialog.findViewById(R.id.ok)).setText("Ok");
        ((Button) lDialog.findViewById(R.id.ok))
                .setOnClickListener(new OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        // write your code to do things after users clicks OK
                        lDialog.dismiss();
                    }
                });
         lDialog.show();
    }
        }

这代码很短，主要的就是showCustomMessage、showCustomMessageOK这两个显示我们自定义的Alertdialog的方法，关键的就是看怎么编写r_okcanceldialogview.xml和r_okdialogview.xml 这两个layout文件了，下面就给出这两个布局文件的代码：

r_okcanceldialogview.xml :

<?xml version="1.0" encoding="utf-8" ?> 
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
                 android:orientation="vertical" 
                 android:layout_width="fill_parent" 
                 android:layout_height="wrap_content" 
                    android:layout_gravity="center_horizontal|center_vertical"
                 >
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
                 android:orientation="vertical" 
                 android:layout_width="fill_parent" 
                 android:layout_height="wrap_content"  
                 android:gravity="center_horizontal"
                 android:background="@drawable/alert"
                 android:layout_marginLeft="20dip" 
                 android:layout_marginRight="20dip">
  <TextView android:layout_width="wrap_content" 
                  android:layout_height="wrap_content" 
                  android:layout_marginTop="17dip" 
                  android:textColor="#ffffff" 
                  android:text="About to call 323" 
                  android:textStyle="bold" 
                  android:textSize="16dip"
                  android:id="@+id/dialog_title"/> 
  <TextView android:layout_width="wrap_content" 
                  android:layout_height="wrap_content" 
                  android:layout_margin="10dip" 
                  android:gravity="center_horizontal"
                  android:textSize="16dip"
                  android:textColor="#ffffff" 
                  android:text="Are you sure you want to proceed?" 
                  android:id="@+id/dialog_message"/> 
  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
                  android:orientation="horizontal" 
                  android:layout_width="fill_parent" 
                  android:layout_height="wrap_content" 
                 android:layout_marginTop="10dip" 
                android:layout_marginBottom="10dip"
                android:gravity="center_horizontal"
                  >
  <Button android:layout_height="40dip" 
                  android:layout_width="0dip" 
                  android:background="@drawable/custom_button1"
                  android:layout_weight="0.5"
                  android:layout_gravity="left" 
                  android:textColor = "@color/White"
                  android:text="Cancel"
                  android:textStyle="bold"
                  android:layout_marginLeft="10dip"
                  android:id="@+id/cancel" /> 
  <Button android:layout_height="40dip" 
              android:layout_width="0dip" 
              android:background="@drawable/custom_button" 
              android:text="OK"
              android:textStyle="bold"
              android:layout_weight="0.5"
              android:textColor="@color/White"
              android:layout_marginRight="10dip" 
              android:layout_marginBottom="10dip"
              android:id="@+id/ok" /> 
  </LinearLayout>
  </LinearLayout>
  </LinearLayout>

r_okdialogview.xml :

<?xml version="1.0" encoding="utf-8" ?> 
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
                 android:orientation="vertical" 
                 android:layout_width="fill_parent" 
                 android:layout_height="wrap_content" 
                    android:layout_gravity="center_horizontal|center_vertical"
                 >
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
                 android:orientation="vertical" 
                 android:background="@drawable/alert"
                 android:layout_width="fill_parent" 
                 android:layout_height="wrap_content"  
                 android:gravity="center_horizontal"
                 android:layout_marginLeft="20dip" 
                 android:layout_marginRight="20dip">
  <TextView android:layout_width="wrap_content" 
                  android:layout_height="wrap_content" 
                  android:layout_marginTop="15dip" 
                  android:textColor="#ffffff" 
                  android:text="About to call 323" 
                  android:textStyle="bold" 
                  android:textSize="17dip"
                  android:id="@+id/dialog_title"/> 
  <TextView android:layout_width="wrap_content" 
                  android:layout_height="wrap_content" 
                  android:layout_margin="10dip" 
                  android:gravity="center_horizontal"
                  android:textSize="15dip"
                  android:textColor="#ffffff" 
                  android:text="Are you sure you want to proceed?" 
                  android:id="@+id/dialog_message"/> 
  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
                  android:orientation="horizontal" 
                  android:layout_width="fill_parent" 
                  android:layout_height="wrap_content" 
                 android:layout_marginTop="10dip" 
                android:layout_marginBottom="10dip"
                android:gravity="center_horizontal"
                  > 
            <Button android:layout_height="40dip" 
              android:layout_width="fill_parent" 
              android:background="@drawable/custom_button" 
              android:text="OK"
              android:textSize="17dip"
              android:textStyle="bold"
              android:textColor="@color/White"
              android:layout_marginRight="10dip" 
              android:layout_marginLeft="10dip" 
              android:layout_marginBottom="10dip"
              android:id="@+id/ok" /> 
  </LinearLayout>
  </LinearLayout>
  </LinearLayout>

这两个layout的xml中引用到了一些图片：

android:background="@drawable/alert”

及按钮样式：

android:background="@drawable/custom_button1"

android:background="@drawable/custom_button"

 因为也不多所以也在这里直接贴出来：
alert.png:

custom_button1.xml :

<?xml version="1.0" encoding="utf-8"?>
<selector
    xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_pressed="true"  android:drawable="@drawable/focused" />
    <item android:state_focused="true" android:drawable="@drawable/focused" />   
    <item android:drawable="@drawable/nofocused" />        
</selector>

custom_button.xml :

<?xml version="1.0" encoding="utf-8"?>
<selector
    xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_pressed="true"  android:drawable="@drawable/nofocused" />
    <item android:state_focused="true" android:drawable="@drawable/nofocused" />
    <item android:drawable="@drawable/focused" />        
</selector>

上面来那个按钮样式中用到的两张图片为：

nofocused.png :

focused.png :

就这么多了，为了方便有需要的人，这里直接给出源码的下载地址：

http://download.csdn.net/source/3480914