Question

我有一个带有ProgressDialog的Android应用程序，当它连接时，它启动了一个计时器。该应用有时会崩溃，但出现以下错误：

var metaRetriever:MediaMetadataRetriever = MediaMetadataRetriever()
metaRetriever.setDataSource(filePath)

var out:String = ""
var txtTime:String = ""

var duration:String = metaRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION)

Log.d("DURATION VALUE", duration)

var dur:Long = duration.toLong()
var seconds:String = ((dur % 60000)/1000).toString()

Log.d("SECONDS VALUE", seconds)

var minutes:String = (dur / 60000).toString()
out = minutes + ":" + seconds

if (seconds.length == 1){
    txtTime = "0" + minutes + ":0" + seconds
}
else {
    txtTime = "0" + minutes + ":" + seconds
}

Log.d("MINUTES VALUE", minutes)
Log.d("FORMATTED TIME", txtTime)

metaRetriever.release()

这是我的代码：

java.lang.IllegalArgumentException: View=DecorView@47b2334[Connecting] not attached to window manager
    at android.view.WindowManagerGlobal.findViewLocked(WindowManagerGlobal.java:508)
    at android.view.WindowManagerGlobal.removeView(WindowManagerGlobal.java:417)
    at android.view.WindowManagerImpl.removeViewImmediate(WindowManagerImpl.java:136)
    at android.app.Dialog.dismissDialog(Dialog.java:446)
    at android.app.Dialog.dismiss(Dialog.java:429)
    at com.trackme.Post.onPostExecute(Post.java:145)
    at com.trackme.Post.onPostExecute(Post.java:43)
    at android.os.AsyncTask.finish(AsyncTask.java:667)
    at android.os.AsyncTask.-wrap1(AsyncTask.java)
    at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:684)
    at android.os.Handler.dispatchMessage(Handler.java:102)
    at android.os.Looper.loop(Looper.java:154)
    at android.app.ActivityThread.main(ActivityThread.java:6816)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1563)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1451)

Answer 1

当您尝试将进度对话框附加到已被破坏的活动或在后台运行时，会出现此错误。通过以下方法检查活动是否正在运行：

activity.isfinishing()如果为假，则附加progressdialog。

@Override
    protected void onPreExecute() {
        progressDialog.setTitle("Connecting");
        progressDialog.setMessage("Trying to connect to your server. Please wait...");
        progressDialog.setCancelable(false);
        progressDialog.setCanceledOnTouchOutside(false);
        if(!context.isFinishing()){
           progressDialog.show();
         }

    }

View = DecorView @ 47b2334 [正在连接]未附加到窗口管理器

1 个答案: