xprivacy的具體用法，我們如何才能準確知道哪個應用要什麼許可權呢？

請利用試錯，利用Xprivacy官方網站提供的相當詳細的說明：

• Accounts
  • return an empty account list (比如你要用淘寶，它會在系統的賬戶資料庫里註冊你的淘寶賬戶，把它幹掉了就可能會導致你無法用淘寶)
  • return fake account info
  • return empty authorization tokens
• Browser
  • return an empty bookmark list
  • return empty search history
• Calendar
  • return an empty calendar
• Calling
  • prevent calls from being placed
  • prevent SMS messages from being sent
  • prevent MMS messages from being sent
  • prevent data messages from being sent
• Clipboard
  • prevent paste from clipboard (both manual and from an application)
• Contacts
  • return an empty contact list
    • content://com.android.contacts/data
    • content://com.android.contacts/raw_contacts
    • content://com.android.contacts/phone_lookup
    • content://com.android.contacts/profile
• Dictionary
  • return an empty user dictionary
• E-mail
  • return an empty list of accounts, e-mails, etc (provider)
• Identification
  • return a fake Android ID
  • return a fake device serial number
  • return a fake host name
  • return a fake Google services framework ID
  • return file not found for folder /proc
  • return a fake Google advertising ID
  • return a fake system property cid (Card Identification Register)
  • return file not found for /sys/block/.../cid
  • return file not found for /sys/class/.../cid
  • return fake input device descriptor
• Internet
  • revoke access to the internet
  • return fake disconnected state
  • return fake supplicant disconnected state
• Location
  • return a random or set location
  • return empty cell location
  • return an empty list of (neighboring) cell info (你發先關掉定位後，百度地圖還是能找到你目前的大致位置，這個時候幹掉它和Wi-Fi scan results，百度地圖才能真的不知道你的位置，這兩類信息和當前位置高度相關，可用於定位)
  • prevents geofences from being set
  • prevents proximity alerts from being set
  • prevents sending NMEA data to an application
  • prevent phone state from being sent to an application
    • Cell info changed
    • Cell location changed
  • prevent sending extra commands (aGPS data)
  • return an empty list of Wi-Fi scan results
  • prevents connecting to Google Play services
• Media
  • prevent recording audio (including from the microphone)
  • prevent taking pictures
  • prevent recording video
  • you will be notified if an application tries to perform any of these actions
• Messages
  • return an empty SMS/MMS message list
  • return an empty list of SMS messages stored on the SIM (ICC SMS)
  • return an empty list of voicemail messages
• Network
  • return fake IP"s
  • return fake MAC"s (network, Wi-Fi, bluetooth)
  • return fake BSSID/SSID
  • return an empty list of Wi-Fi scan results
  • return an empty list of configured Wi-Fi networks
  • return an empty list of bluetooth adapters/devices
• NFC
  • prevent receiving NFC adapter state changes
  • prevent receiving NDEF discovered
  • prevent receiving TAG discovered
  • prevent receiving TECH discovered
• Notifications
  • prevent receiving statusbar notifications (Android 4.3+)
  • prevent C2DM messages
• Overlay
  • prevent draw over / on top
• Phone
  • return a fake own/in/outgoing/voicemail number
  • return a fake subscriber ID (IMSI for a GSM phone)
  • return a fake phone device ID (IMEI): 000000000000000 (比如你開啟了微信的手機保護，這個時候它就會用IMEI、Android ID、Device Serial等信息識別你的設備，如果你幹掉了它，微信就會不停地告訴你「你已經在別的地方登陸」，因為每次微信拿到的設備識別碼都不一樣)
  • return a fake phone type: GSM (matching IMEI)
  • return a fake network type: unknown
  • return an empty ISIM/ISIM domain
  • return an empty IMPI/IMPU
  • return a fake MSISDN
  • return fake mobile network info
    • Country: XX
    • Operator: 00101 (test network)
    • Operator name: fake
  • return fake SIM info
    • Country: XX
    • Operator: 00101
    • Operator name: fake
    • Serial number (ICCID): fake
  • return empty APN list
  • return no currently used APN
  • return an empty call log
  • prevent phone state from being sent to an application
    • Call forwarding indication
    • Call state changed (ringing, off-hook)
    • Mobile data connection state change / being used
    • Message waiting indication
    • Service state changed (service/no service)
    • Signal level changed
  • return an empty group identifier level 1
• Sensors
  • return an empty default sensor
  • return an empty list of sensors
• Shell
  • return I/O exception for Linux shell
  • return I/O exception for Superuser shell
  • return unsatisfied link error for load/loadLibrary
• Storage
  • revoke permission to the media storage
  • revoke permission to the external storage (SD card)
  • return fake unmounted state
• System
  • return an empty list of installed applications
  • return an empty list of recent tasks
  • return an empty list of running processes
  • return an empty list of running services
  • return an empty list of running tasks
  • return an empty list of widgets
  • return an empty list of applications (provider)
  • prevent package add, replace, restart and remove notifications
• View
  • prevent links from opening in the browser
  • return fake browser user agent string
    • Mozilla/5.0 (Linux; U; Android; en-us) AppleWebKit/999+ (KHTML, like Gecko) Safari/999.9