Question

我有一个按钮，在onClick方法上我有一个事件（请求）。我在处理请求时使用AsyncTasc显示一个proggressDialog。问题是，当我点击按钮时，我得到progressDialog，几秒钟后应用程序崩溃。这是我的代码：

 joinButton.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {

                    new AsyncTask<Void, Void, Void>(){
                        @Override
                        protected void onPreExecute() {
                            super.onPreExecute();
                            nextConf = new ProgressDialog(mContext);
                            nextConf.setMessage("message");
                            nextConf.setProgressStyle(ProgressDialog.STYLE_SPINNER);
                            nextConf.setCancelable(false);
                            nextConf.show();
                        }

                        @Override
                        protected Void doInBackground(Void... params) {
                            EventBus.getBus().post(new MainActivity.ConferenceSwitchRequestEvent());
                            return null;
                        }

                        protected void onPostExecute(Void result) {
                            super.onPostExecute(result);
                            nextConf.dismiss();
                        };

                    }.execute();
                }
            });
        }

        return view;

这些是崩溃日志：

01/com.xxx.xxx E/WindowManager﹕ android.view.WindowLeaked: Activity com.xxx.xxx.MainActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView{42c8ad68 V.E..... R......D 0,0-1061,288} that was originally added here
        at android.view.ViewRootImpl.<init>(ViewRootImpl.java:462)
        at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:267)
        at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:69)
        at android.app.Dialog.show(Dialog.java:289)
        at com.xxx.xxxx.ConferenceMembersListAdapter$1$1.onPreExecute(ConferenceMembersListAdapter.java:141)
        at android.os.AsyncTask.executeOnExecutor(AsyncTask.java:587)
        at android.os.AsyncTask.execute(AsyncTask.java:535)
        at com.xxx.xxx.ConferenceMembersListAdapter$1.onClick(ConferenceMembersListAdapter.java:133)
        at android.view.View.performClick(View.java:4640)
        at android.view.View$PerformClick.run(View.java:19421)
        at android.os.Handler.handleCallback(Handler.java:733)
        at android.os.Handler.dispatchMessage(Handler.java:95)
        at android.os.Looper.loop(Looper.java:136)
        at android.app.ActivityThread.main(ActivityThread.java:5579)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:515)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1268)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1084)
        at dalvik.system.NativeStart.main(Native Method)

任何想法为什么？提前谢谢你。

Answer 1

崩溃因为`protected Void doInBackground（Void ... result）{ EventBus.getBus（）。post（new MainActivity.ConferenceSwitchRequestEvent（））; 无效进展; return null;

返回null

如果我使用AsyncTask，ProgressDialiog会崩溃应用程序？

1 个答案: