1. <permission>
this is the permission other should acquire before using this app
<permission android:name="course.labs.permissions.DANGEROUS_ACTIVITY_PERM" android:label="my_permission" android:protectionLevel="normal" > </permission>
2. <user-permission>
this is the permission an app should acquire before using another app or system funtion like read phone contact.
<uses-permission android:name="course.labs.permissions.DANGEROUS_ACTIVITY_PERM" />
3. system permission
android.permission.CALL_EMERGENCY_NUMBERS
android.permission.READ_OWNER_DATA
android.permission.SET_WALLPAPER
android.permission.DEVICE_POWER
原文：http://www.cnblogs.com/phoenix13suns/p/4081020.html