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");