模拟Iphone 样式的 AlertDialog

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 [e-mail]** 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

(源自：http://www.cnblogs.com/hibraincol/archive/2011/07/30/2121756.html)