语法如下:
<meta-data android:name="string" android:resource="resource specification" android:value="string" />
<meta-data>标签可以作为子标签,可以被包含在<activity>、<application> 、<service>和<receiver>中:
1. Activity标签中:
<activity...> <meta-data android:name="Data_Name" android:value="DataValue"></meta-data> </activity>
在代码中动态获取:
ActivityInfo info=this.getPackageManager() .getActivityInfo(getComponentName(), PackageManager.GET_META_DATA); String msg =info.metaData.getString("Data_Name");
2.application标签中:
<application...> <meta-data android:value="DataValue" android:name="Data_Name"></meta-data> </application>
在代码中动态获取:
ApplicationInfo appInfo = this.getPackageManager() .getApplicationInfo(getPackageName(), PackageManager.GET_META_DATA); String msg=appInfo.metaData.getString("Data_Name");
3.在service标签中:
<service android:name="MetaDataService"> <meta-data android:value="DataValue" android:name="Data_Name"></meta-data> </service>
在代码中获取:
ComponentName cn=new ComponentName(this, MetaDataService.class); ServiceInfo info=this.getPackageManager() .getServiceInfo(cn, PackageManager.GET_META_DATA); String msg=info.metaData.getString("Data_Name");
4. 在receive标签中:
<receiver android:name="MetaDataReceiver"> <meta-data android:value="DataValuer" android:name="Data_Name"></meta-data> <intent-filter> <action android:name="android.intent.action.PHONE_STATE"></action> </intent-filter> </receiver>
在代码中获取:
ComponentName cn=new ComponentName(context, MetaDataReceiver.class); ActivityInfo info=context.getPackageManager() .getReceiverInfo(cn, PackageManager.GET_META_DATA); String msg=info.metaData.getString("Data_Name");