android Settings項目安裝 (模擬器版)

參考了網上的一些文章，現總結如下：

1. 運行eclipse的debug，將自己的settings安裝到模擬器上會出現如下錯誤

   [2012-03-08 11:14:27 - Settings] Android Launch!
   [2012-03-08 11:14:27 - Settings] adb is running normally.
   [2012-03-08 11:14:27 - Settings] Performing com.android.settings.Settings activity launch
   [2012-03-08 11:14:27 - Settings] Automatic Target Mode: Preferred AVD 'Demo1' is available on emulator 'emulator-5554'
   [2012-03-08 11:14:27 - Settings] WARNING: Application does not specify an API level requirement!
   [2012-03-08 11:14:27 - Settings] Device API version is 8 (Android 2.2)
   [2012-03-08 11:14:27 - Settings] Uploading Settings.apk onto device 'emulator-5554'
   [2012-03-08 11:15:00 - Settings] Installing Settings.apk...
   [2012-03-08 11:15:31 - Settings] Installation error: INSTALL_FAILED_UPDATE_INCOMPATIBLE
   [2012-03-08 11:15:31 - Settings] Please check logcat output for more details.
   [2012-03-08 11:15:31 - Settings] Launch canceled!

   就是說你自己寫的settings簽名和系統內建的settings簽名不一致，要先卸載原settings

2. 卸載seetings

• 正常卸載adb uninstall com.android.settings會報Failure

  網上找的方法是 adb shell "cd /system/app;rm Settings.apk;"

  但是會報錯rm failed for Settings.apk, Read-only file system

• 得先執行這句（adb 模式下直接就是root許可權）adb remount

  提示remount succeeded   （remount的作用大概就是提升讀寫權限，使之可以操作唯讀檔案）

• 然後就可以執行 adb shell "cd /system/app;rm Settings.apk;"
• 成功刪除之後，執行
  adb uninstall com.android.settings
• 卸載成功！安裝自己的settings
  

參考http://blog.csdn.net/stonecao/article/details/6460116