Android：App最终在Post Execute的Async Task中崩溃

概述在我的应用程序中,我从Web服务器获取数据.我使用异步任务来获取数据.但是,问题有时我的应用程序在progressDialog.dismiss()上的onPostExecute崩溃.但是,每次都不会发生这种情况.这是我的代码： 异步任务 public class GetFeaturedStoreListAsyncTask extends AsyncTask<Void, Void, String> 在我的应用程序中,我从Web服务器获取数据.我使用异步任务来获取数据.但是,问题有时我的应用程序在progressDialog.dismiss()上的onPostExecute崩溃.但是,每次都不会发生这种情况.这是我的代码：

异步任务

public class GetFeaturedStoreListAsyncTask extends AsyncTask<VoID,VoID,String>{Context ctx;ProgressDialog pd;ListVIEw ListFeaturedStore;String dataUrl;public static final String TAG = "GetFeaturedStoreAsyncTask";public static ArrayList<StoreDescriptionDAO> featuredDAOList;public GetFeaturedStoreListAsyncTask(String dataUrl,Context ctx,ListVIEw ListFeaturedStore) {    this.dataUrl = dataUrl;    this.ctx = ctx;    this.ListFeaturedStore = ListFeaturedStore;}//Constructor@OverrIDeprotected voID onPreExecute() {    pd = new ProgressDialog(ctx);    pd.setMessage(ctx.getResources().getString(R.string.please_wait));    pd.show();}//onPreExecute@OverrIDeprotected String doInBackground(VoID... params) {       Log.v(TAG,"doInBackground called");    JsONParser JsonParser = new JsONParser();    String serverResponse = JsonParser.getJsonString(dataUrl);    return serverResponse;}//doInBackground@OverrIDeprotected voID onPostExecute(String response) {    Featuredlistadapter mFeaturedlistadapter = null;    mFeaturedlistadapter = getFeaturedlistadapter(response);    if(mFeaturedlistadapter != null)    {        Log.v(TAG,"adapter not null");        ListFeaturedStore.setAdapter(mFeaturedlistadapter);        ListFeaturedStore.setLayoutAnimation(AnimationUtility.fastCascadeListVIEwAnimation());        pd.dismiss();    }//if    else    {        Log.v(TAG,"adapter null");        pd.dismiss();        SeattleNightlifeUtility.OpenUtilityDialog(ctx,ctx.getResources().getString(R.string.network_error_msg));    }//else}//onPostExecuteprivate Featuredlistadapter getFeaturedlistadapter(String Jstring) {    Featuredlistadapter mFeaturedAdapter = null;    featuredDAOList =             ParsedFeaturedStoreDescdata.getFeaturedStoreDesc(Jstring);    if(featuredDAOList != null             && featuredDAOList.size() > 0)    {        mFeaturedAdapter = new Featuredlistadapter(ctx,featuredDAOList);        Log.v(TAG,"arrayList size > 0");        return mFeaturedAdapter;    }//if    else    {        return null;    }//else}//getFeaturedlistadapter}//GetCityStoreAsyncTask

这是我的logcat：

Activity com.dzo.seattlesnightlife.FeaturedActivity has leaked window com.androID.internal.policy.impl.PhoneWindow$DecorVIEw@4a715c38 that was originally added here02-02 15:23:45.426: E/WindowManager(12627): androID.vIEw.WindowLeaked: Activity com.dzo.seattlesnightlife.FeaturedActivity has leaked window com.androID.internal.policy.impl.PhoneWindow$DecorVIEw@4a715c38 that was originally added here02-02 15:23:45.426: E/WindowManager(12627):     at androID.vIEw.VIEwRoot.<init>(VIEwRoot.java:247)02-02 15:23:45.426: E/WindowManager(12627):     at androID.vIEw.WindowManagerImpl.addVIEw(WindowManagerImpl.java:148)02-02 15:23:45.426: E/WindowManager(12627):     at androID.vIEw.WindowManagerImpl.addVIEw(WindowManagerImpl.java:91)02-02 15:23:45.426: E/WindowManager(12627):     at androID.vIEw.Window$LocalWindowManager.addVIEw(Window.java:424)02-02 15:23:45.426: E/WindowManager(12627):     at androID.app.Dialog.show(Dialog.java:241)02-02 15:23:45.426: E/WindowManager(12627):     at com.dzo.seattlesnightlife.asynctask.GetFeaturedStoreListAsyncTask.onPreExecute(GetFeaturedStoreListAsyncTask.java:40)02-02 15:23:45.426: E/WindowManager(12627):     at androID.os.AsyncTask.execute(AsyncTask.java:391)02-02 15:23:45.426: E/WindowManager(12627):     at com.dzo.seattlesnightlife.FeaturedActivity$MyTimerTask.run(FeaturedActivity.java:173)02-02 15:23:45.426: E/WindowManager(12627):     at androID.os.Handler.handleCallback(Handler.java:587)02-02 15:23:45.426: E/WindowManager(12627):     at androID.os.Handler.dispatchMessage(Handler.java:92)02-02 15:23:45.426: E/WindowManager(12627):     at androID.os.Looper.loop(Looper.java:123)02-02 15:23:45.426: E/WindowManager(12627):     at androID.app.ActivityThread.main(ActivityThread.java:4633)02-02 15:23:45.426: E/WindowManager(12627):     at java.lang.reflect.Method.invokeNative(Native Method)02-02 15:23:45.426: E/WindowManager(12627):     at java.lang.reflect.Method.invoke(Method.java:521)02-02 15:23:45.426: E/WindowManager(12627):     at com.androID.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858)02-02 15:23:45.426: E/WindowManager(12627):     at com.androID.internal.os.ZygoteInit.main(ZygoteInit.java:616)02-02 15:23:45.426: E/WindowManager(12627):     at dalvik.system.NativeStart.main(Native Method)02-02 15:23:45.456: V/GetFeaturedStoreAsyncTask(12627): arrayList size > 002-02 15:23:45.456: V/GetFeaturedStoreAsyncTask(12627): adapter not null02-02 15:23:45.526: W/dalvikvm(12627): threadID=1: thread exiting with uncaught exception (group=0x400207d8)02-02 15:23:45.536: E/AndroIDRuntime(12627): FATAL EXCEPTION: main02-02 15:23:45.536: E/AndroIDRuntime(12627): java.lang.IllegalArgumentException: VIEw not attached to window manager02-02 15:23:45.536: E/AndroIDRuntime(12627):    at androID.vIEw.WindowManagerImpl.findVIEwLocked(WindowManagerImpl.java:355)02-02 15:23:45.536: E/AndroIDRuntime(12627):    at androID.vIEw.WindowManagerImpl.removeVIEw(WindowManagerImpl.java:200)02-02 15:23:45.536: E/AndroIDRuntime(12627):    at androID.vIEw.Window$LocalWindowManager.removeVIEw(Window.java:432)02-02 15:23:45.536: E/AndroIDRuntime(12627):    at androID.app.Dialog.dismissDialog(Dialog.java:278)02-02 15:23:45.536: E/AndroIDRuntime(12627):    at  androID.app.Dialog.access
if ((this.mDialog != null) && this.mDialog.isShowing()) {    this.mDialog.dismiss();    this.mDialog = null; }
0(Dialog.java:71)02-02 15:23:45.536: E/AndroIDRuntime(12627):    at androID.app.Dialog.run(Dialog.java:111)02-02 15:23:45.536: E/AndroIDRuntime(12627):    at androID.app.Dialog.dismiss(Dialog.java:268)02-02 15:23:45.536: E/AndroIDRuntime(12627):    at com.dzo.seattlesnightlife.asynctask.GetFeaturedStoreListAsyncTask.onPostExecute(GetFeaturedStoreListAsyncTask.java:63)02-02 15:23:45.536: E/AndroIDRuntime(12627):    at com.dzo.seattlesnightlife.asynctask.GetFeaturedStoreListAsyncTask.onPostExecute(GetFeaturedStoreListAsyncTask.java:1)02-02 15:23:45.536: E/AndroIDRuntime(12627):    at androID.os.AsyncTask.finish(AsyncTask.java:417)02-02 15:23:45.536: E/AndroIDRuntime(12627):    at androID.os.AsyncTask.access0(AsyncTask.java:127)02-02 15:23:45.536: E/AndroIDRuntime(12627):    at androID.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:429)02-02 15:23:45.536: E/AndroIDRuntime(12627):    at androID.os.Handler.dispatchMessage(Handler.java:99)02-02 15:23:45.536: E/AndroIDRuntime(12627):    at androID.os.Looper.loop(Looper.java:123)02-02 15:23:45.536: E/AndroIDRuntime(12627):    at androID.app.ActivityThread.main(ActivityThread.java:4633)02-02 15:23:45.536: E/AndroIDRuntime(12627):    at java.lang.reflect.Method.invokeNative(Native Method)02-02 15:23:45.536: E/AndroIDRuntime(12627):    at java.lang.reflect.Method.invoke(Method.java:521)02-02 15:23:45.536: E/AndroIDRuntime(12627):    at com.androID.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858)02-02 15:23:45.536: E/AndroIDRuntime(12627):    at com.androID.internal.os.ZygoteInit.main(ZygoteInit.java:616)02-02 15:23:45.536: E/AndroIDRuntime(12627):    at dalvik.system.NativeStart.main(Native Method)02-02 15:23:45.556: W/ActivityManager(180):   Force finishing activity com.dzo.seattlesnightlife/.FeaturedActivity

解决方法 在退出活动后尝试显示ProgressDialog时会出现此问题.

我刚刚解决了这个问题尝试这种方式：

public interface OnTaskCompleted {    voID onTaskCompleted();}

在您重写的onDestroy()或onStop()方法中.

编辑：您可以创建接口,将其传递给AsyncTask(在构造函数中),然后在onPostExecute中调用方法.

例如：

你的界面：

public YourActivity implements OnTaskCompleted {    //your Activity}

你的活动：

public YourTask extends AsyncTask<Object,Object,Object> { //change Object to required type    private OnTaskCompleted Listener;    public YourTask(OnTaskCompleted Listener) {        this.Listener=Listener;    }//required methods    protected voID onPostExecute(Object o) {        //your stuff        Listener.onTaskCompleted();    }}

而你的AsyncTask：

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