Android异步任务不工作

“onPreExecute（）”上有错误

请参阅我的代码： 我有点困惑( 下载方法（loadDailyDownloadData）包含在不同的类中（调用

AsyncTask

是不同的类…）

没有AsynTask，我的功能运行正常这意味着如果我调用

新的DownlaudTableActivity（）。LoadDaily下载数据（strBusinessUnit、strExecutive、strertorycode、strUField1）
请帮帮我
提前感谢
看起来，您的
DownlaudTableActivity（）
确实没有运行。您不能启动活动，只需实例化它，您需要调用
startActivity（Intent）
，为要启动的活动传递
Intent
。
然而，您的代码看起来很奇怪。
downloadttableActivity（）.LoadDaily下载数据（strBusinessUnit、strExecutive、strertorycode、strUField1）谢谢，我对这一点不太清楚。。。但此处“@Override protected void onPreExecute（）{this.dialog.setMessage（“下载表数据……）；this.dialog.show（）；myProgress=0；}”上出现错误消息。是吗？@Nagkeeran Piraba，您的日志猫清楚地表明您正在尝试执行当前未运行的活动的方法。
public class ListRoutesActivity extends Activity {

 public void onNextAction(View view){
    if(selectedRoutes.size() > 0){
        StringBuffer routeCode = new StringBuffer();
        for(int i=0; i<selectedRoutes.size();i++){
            routeCode.append("\'" + selectedRoutes.get(i) +"\'" +",");
        }
        routeCode.delete(routeCode.length() - 1,routeCode.length());
        strUField1 = routeCode.toString();
        new DailyDownldAsyncTask().execute();
    //  String s = new DownlaodTableActivity().loadDailyDownloadData(strBusinessUnit, strExecutive,strTerritoryCode,strUField1);
    //  System.out.println(" ---s - " + s);

    }else{
        Toast.makeText(ListRoutesActivity.this,"Please select the Route!",Toast.LENGTH_SHORT).show();
    }
     return;
 }



     public class DailyDownldAsyncTask extends AsyncTask<String, Integer, String> {
         private final ProgressDialog dialog = new ProgressDialog(ListRoutesActivity.this);
         int myProgress;

        @Override
        protected void onPostExecute(String result) {
            System.out.println(" ---- result--- " + result);
            if (this.dialog.isShowing()) {
                this.dialog.dismiss();
            }
            Toast.makeText(ListRoutesActivity.this,"Download successfully",Toast.LENGTH_SHORT).show();

        }

      @Override
      protected void onPreExecute() {

          this.dialog.setMessage("Downloading Table Data.......");
          this.dialog.show();
          myProgress = 0;
      }

      @Override
      protected String doInBackground(String... params) {
          return  new DownlaodTableActivity().loadDailyDownloadData(strBusinessUnit, strExecutive,strTerritoryCode,strUField1);

      }

      @Override
      protected void onProgressUpdate(Integer... values) {
          dialog.setProgress(values[0]);
      }
 }}

08-19 17:45:18.933: ERROR/AndroidRuntime(472): FATAL EXCEPTION: main
08-19 17:45:18.933: ERROR/AndroidRuntime(472): java.lang.IllegalStateException: Could not execute method of the activity
08-19 17:45:18.933: ERROR/AndroidRuntime(472):     at android.view.View$1.onClick(View.java:2144)
08-19 17:45:18.933: ERROR/AndroidRuntime(472):     at android.view.View.performClick(View.java:2485)
08-19 17:45:18.933: ERROR/AndroidRuntime(472):     at android.view.View$PerformClick.run(View.java:9080)
08-19 17:45:18.933: ERROR/AndroidRuntime(472):     at android.os.Handler.handleCallback(Handler.java:587)
08-19 17:45:18.933: ERROR/AndroidRuntime(472):     at android.os.Handler.dispatchMessage(Handler.java:92)
08-19 17:45:18.933: ERROR/AndroidRuntime(472):     at android.os.Looper.loop(Looper.java:123)
08-19 17:45:18.933: ERROR/AndroidRuntime(472):     at android.app.ActivityThread.main(ActivityThread.java:3683)
08-19 17:45:18.933: ERROR/AndroidRuntime(472):     at java.lang.reflect.Method.invokeNative(Native Method)
08-19 17:45:18.933: ERROR/AndroidRuntime(472):     at java.lang.reflect.Method.invoke(Method.java:507)
08-19 17:45:18.933: ERROR/AndroidRuntime(472):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
08-19 17:45:18.933: ERROR/AndroidRuntime(472):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
08-19 17:45:18.933: ERROR/AndroidRuntime(472):     at dalvik.system.NativeStart.main(Native Method)
08-19 17:45:18.933: ERROR/AndroidRuntime(472): Caused by: java.lang.reflect.InvocationTargetException
08-19 17:45:18.933: ERROR/AndroidRuntime(472):     at java.lang.reflect.Method.invokeNative(Native Method)
08-19 17:45:18.933: ERROR/AndroidRuntime(472):     at java.lang.reflect.Method.invoke(Method.java:507)
08-19 17:45:18.933: ERROR/AndroidRuntime(472):     at android.view.View$1.onClick(View.java:2139)
08-19 17:45:18.933: ERROR/AndroidRuntime(472):     ... 11 more
08-19 17:45:18.933: ERROR/AndroidRuntime(472): Caused by: android.view.WindowManager$BadTokenException: Unable to add window -- token android.app.LocalActivityManager$LocalActivityRecord@4054c798 is not valid; is your activity running?
08-19 17:45:18.933: ERROR/AndroidRuntime(472):     at android.view.ViewRoot.setView(ViewRoot.java:527)
08-19 17:45:18.933: ERROR/AndroidRuntime(472):     at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:177)
08-19 17:45:18.933: ERROR/AndroidRuntime(472):     at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91)
08-19 17:45:18.933: ERROR/AndroidRuntime(472):     at android.view.Window$LocalWindowManager.addView(Window.java:424)
08-19 17:45:18.933: ERROR/AndroidRuntime(472):     at android.app.Dialog.show(Dialog.java:241)
08-19 17:45:18.933: ERROR/AndroidRuntime(472):     at com.xont.controller.admin.ListRoutesActivity$DailyDownldAsyncTask.onPreExecute(ListRoutesActivity.java:164)
08-19 17:45:18.933: ERROR/AndroidRuntime(472):     at android.os.AsyncTask.execute(AsyncTask.java:391)
08-19 17:45:18.933: ERROR/AndroidRuntime(472):     at com.xont.controller.admin.ListRoutesActivity.onNextAction(ListRoutesActivity.java:100)
08-19 17:45:18.933: ERROR/AndroidRuntime(472):     ... 14 more