谁能告诉我为什么我的异步任务有时会像这样失败?我在 3 台设备上对其进行了测试,但我从未发生过此错误。我上传到 GooglePlay,下载 200 次后有3 个错误报告,我不知道错误的主要来源是什么...
java.lang.RuntimeException: An error occured while executing doInBackground()
at android.os.AsyncTask$3.done(AsyncTask.java:200)
at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:274)
at java.util.concurrent.FutureTask.setException(FutureTask.java:125)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:308)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1088)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581)
at java.lang.Thread.run(Thread.java:1019)
Caused by: android.view.ViewRoot$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.
at android.view.ViewRoot.checkThread(ViewRoot.java:3225)
at android.view.ViewRoot.invalidateChild(ViewRoot.java:760)
at android.view.ViewRoot.invalidateChildInParent(ViewRoot.java:786)
at android.view.ViewGroup.invalidateChild(ViewGroup.java:2511)
at android.view.View.invalidate(View.java:5498)
at android.view.View.setBackgroundDrawable(View.java:7845)
at android.view.View.setBackgroundResource(View.java:7754)
at com.KeySoft.NewPilates.Activities.LatestActivity.parseXml(LatestActivity.java:1106)
at com.KeySoft.NewPilates.Activities.LatestActivity.access$1(LatestActivity.java:964)
at com.KeySoft.NewPilates.Activities.LatestActivity$DownloadXml.doInBackground(LatestActivity.java:354)
at com.KeySoft.NewPilates.Activities.LatestActivity$DownloadXml.doInBackground(LatestActivity.java:1)
at android.os.AsyncTask$2.call(AsyncTask.java:185)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:306)
我看到我的 AsyncTaks 的* doInBackground * 函数有一个setBackgroundDrawable和setBacktroundResource函数,它们做得不太好......有什么想法吗?
编辑:
从检查的答案中得到解决方案:
我必须使用新的 Runnable 来修改 doInBackround 内部的视图。
runOnUiThread(new Runnable() {
public void run() {
LinearLayout hatterLayout = (LinearLayout)findViewById(R.id.hatterLayout);
hatterLayout.setBackgroundResource(R.drawable.nonet);
}