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For completeness we really should handle the possibility of the task getting cancelled. This can happen when the user navigates away from the app and the task is killed before its completed. This will cause the onPostExecute() method to not be called and so the onRefreshComplete() method won’t be called. Depending on how the user navigates through the app, they could return to this activity without going through the complete onCreate() lifecycle, and you’ll end up with the screen still showing the “loading” progress message in the header. This is common when using tabs between multiple ListViews. Also, the documented best practices for implementing an AsyncTask says that in long running background work you should periodically check if the task has been cancelled and try to gracefully quit your work and exit. So let’s get all of that in there.

[通用部分] 如果開了一個以上的模擬器的話請自行加adb參數 0a. 先adb pull /system/etc/hosts hosts抓回local來修改。 0b. 在原本的 127.0.0.1 localhost 加上新的行，寫入你需要的對應如 192.168.1.15 mytestsite，存檔。 1. adb remount (才不會發生Read-only file system錯誤) 2. adb push hosts /system/etc/hosts

[2.0.1, 2.1 only] 這兩個版本會在這邊丟出錯誤訊息，分別為 failed to copy 'hosts' to '/system/etc/hosts': No space left on device failed to copy 'hosts' to '/system/etc/hosts': Out of memory 解決方法是，開啟模擬器時不要直接從 AVD Manager介面開，請下指令: $ emulator -avd youravdname -partition-size 128 接著再對這個模擬器使用上面的 hosts修改大法就不會出現錯誤了。 partition size的單位是MB，預設似乎是64。從adb shell 用 df 指令觀察的結果，/system 和 /data 都會被這個設定成這邊指定的值。而1.5, 1.6 的 image 因為剛好沒超過 64MB，還剩下一點空間，所以 hosts 還寫得進去，而 2.x 的 image 有 七萬多K，mount之後 /system 這個 partition 看起來就是全滿，剩下空間 0K。因此 hosts變肥後無法寫入，真的是因為partition爆了。事實上正常的手機確實也不需要留空間給user hack…模擬器還讓我們調參數已經很偷笑了，可惜AVD Manager 的 Start 沒地方可以設定 partition size。若有此需求的話只好麻煩一點手動下指定開emulator囉。