我有一個以AsyncTask開始的活動來檢查到我的服務器api的連接。 因爲這不應該在UI線程中運行,所以我爲此做了一個AsyncTask。OnCreate中的AsyncTask在運行時失敗,在Android中如何避免這種情況?
問題是,當我開始Asynctask的後臺進程時得到一個運行時異常。
我該如何避免這種情況?
從日誌:
10-12 14:18:56.476: ERROR/AndroidRuntime(1523): java.lang.RuntimeException: An error occured while executing doInBackground()
10-12 14:18:56.476: ERROR/AndroidRuntime(1523): at android.os.AsyncTask$3.done(AsyncTask.java:200)
10-12 14:18:56.476: ERROR/AndroidRuntime(1523): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:234)
10-12 14:18:56.476: ERROR/AndroidRuntime(1523): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:258)
10-12 14:18:56.476: ERROR/AndroidRuntime(1523): at java.util.concurrent.FutureTask.run(FutureTask.java:122)
10-12 14:18:56.476: ERROR/AndroidRuntime(1523): at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:648)
10-12 14:18:56.476: ERROR/AndroidRuntime(1523): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:673)
10-12 14:18:56.476: ERROR/AndroidRuntime(1523): at java.lang.Thread.run(Thread.java:1058)
10-12 14:18:56.476: ERROR/AndroidRuntime(1523): Caused by: java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
10-12 14:18:56.476: ERROR/AndroidRuntime(1523): at android.os.Handler.<init>(Handler.java:121)
小心發佈一些代碼? – Felix 2009-10-12 15:47:06