Android获取Manifest中元素的值

转自: http://www.2cto.com/kf/201303/194824.html

 

android 开发中:

 
AndroidManifest.xml中,<meta-data>元素可以作为子元素,
 
被包含在<activity>、<application> 、<service>和<receiver>元素中,
不同的父元素,在应用时读取的方法也不同。
 
1 :在Activity应用<meta-data>元素。
    xml代码段:
   
<activity...>

    <meta-data android:name="data_Name" android:value="hello my activity"></meta-data>

</activity>
   
    java代码段:
   ActivityInfo info=this.getPackageManager()

                          .getActivityInfo(getComponentName(),

                          PackageManager.GET_META_DATA);

    String msg =info.metaData.getString("data_Name");

    Log.d(TAG, " msg == " + msg );

  

 
2:在application应用<meta-data>元素。
   xml代码段:
  <application...>

       <meta-data android:value="hello my application" android:name="data_Name"></meta-data>

   </application>
  
   java代码段:
    ApplicationInfo appInfo = this.getPackageManager()

                                  .getApplicationInfo(getPackageName(),

                          PackageManager.GET_META_DATA);

    String msg=appInfo.metaData.getString("data_Name");

    Log.d(TAG, " msg == " + msg );

 

 
3:在service应用<meta-data>元素。
   xml代码段:
   <service android:name="MetaDataService">

      <meta-data android:value="hello my service" android:name="data_Name"></meta-data>

   </service>

 

 
   java代码段:
   ComponentName cn=new ComponentName(this, MetaDataService.class);

   ServiceInfo info=this.getPackageManager()

                        .getServiceInfo(cn, PackageManager.GET_META_DATA);

    String msg=info.metaData.getString("data_Name");

    Log.d(TAG, " msg == " + msg );
 
4: 在receiver应用<meta-data>元素。
   xml代码段:
    <receiver android:name="MetaDataReceiver">

            <meta-data android:value="hello my receiver" android:name="data_Name"></meta-data>

            <intent-filter>

                <action android:name="android.intent.action.PHONE_STATE"></action>

            </intent-filter>

    </receiver>

 

   java代码段:
    ComponentName cn=new ComponentName(context, MetaDataReceiver.class);

    ActivityInfo info=context.getPackageManager()

                             .getReceiverInfo(cn, PackageManager.GET_META_DATA);

    String msg=info.metaData.getString("data_Name");

    Log.d(TAG, " msg == " + msg );

 

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