Permission is only granted to system apps

http://stackoverflow.com/questions/13801984/permission-is-only-granted-to-system-app

加 <uses-permission android:name="android.permission.SET_PREFERRED_APPLICATIONS" />

时，出现

Permission is only granted to system apps

错误。

解决：

In Eclipse:

Window -> Preferences -> Android -> Lint Error Checking.

In the list find an entry with ID = ProtectedPermission. Set the Severity to something lower than Error. This way you can still compile the project using Eclipse.