相关疑难解决方法(0)

这个错误是什么,为什么会发生？

05-17 18:24:57.069: ERROR/WindowManager(18850): Activity com.mypkg.myP has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@44c46ff0 that was originally added here
05-17 18:24:57.069: ERROR/WindowManager(18850): android.view.WindowLeaked: Activity ccom.mypkg.myP has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@44c46ff0 that was originally added here
05-17 18:24:57.069: ERROR/WindowManager(18850):     at android.view.ViewRoot.<init>(ViewRoot.java:231)
05-17 18:24:57.069: ERROR/WindowManager(18850):     at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:148)
05-17 18:24:57.069: ERROR/WindowManager(18850):     at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91)
05-17 18:24:57.069: ERROR/WindowManager(18850):     at android.view.Window$LocalWindowManager.addView(Window.java:424)
05-17 18:24:57.069: ERROR/WindowManager(18850):     at android.app.Dialog.show(Dialog.java:239)
05-17 18:24:57.069: ERROR/WindowManager(18850):     at com.mypkg.myP$PreparePairingLinkageData.onPreExecute(viewP.java:183)
05-17 18:24:57.069: ERROR/WindowManager(18850):     at android.os.AsyncTask.execute(AsyncTask.java:391)
05-17 18:24:57.069: ERROR/WindowManager(18850):     at com.mypkg.myP.onCreate(viewP.java:94)
05-17 18:24:57.069: ERROR/WindowManager(18850):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
05-17 18:24:57.069: ERROR/WindowManager(18850):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2544) …

我已经创建了这样的进度对话框

public VolleyService(Context context, VolleyServiceCompletedListener listener){
    this.context = context;
    pDialog = new ProgressDialog(context);
    pDialog.setMessage("Loading...");
    pDialog.setCancelable(false);
    this.listener = listener;
}

并尝试使用此方法显示进度对话框.

private void showProgressDialog() {
    boolean isShowing = pDialog.isShowing();
    if (!isShowing)
        pDialog.show();
}

并使用此方法隐藏对话框.

private void hideProgressDialog() {
    if (pDialog.isShowing()) {
        pDialog.hide();
    }
} 

pDialog.isShowing()即使在我调用之后,问题也会返回true pDialog.hide().当我看到hide()方法时,android.app.Dialog.java他们没有将mShowing变量赋值为false,但是当我调用show()它们时,它们将mShowing变量赋值为true.

那么他们有什么理由不做假的吗？我怎样才能再次打开相同的进度对话框？