實現透明活動(Transparent Activity)

要令應用程序的背景設定為實現, 可以修改AndroidManifest.xml, 添加
android:theme="@android:style/Theme.Translucent"

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
 package="com.AndroidProgressDialog"
 android:versionCode="1"
 android:versionName="1.0" >

 <uses-sdk android:minSdkVersion="8" />

 <application
     android:icon="@drawable/ic_launcher"
     android:label="@string/app_name" >
     <activity
         android:name=".AndroidProgressDialog"
         android:label="@string/app_name"
         android:theme="@android:style/Theme.Translucent">
         <intent-filter>
             <action android:name="android.intent.action.MAIN" />

             <category android:name="android.intent.category.LAUNCHER" />
         </intent-filter>
     </activity>
 </application>

</manifest>