Question

当我按下模拟器的按钮时，我收到此异常。请告诉您这个错误的类型是什么。如何解决此错误

10-23 01:22:37.435: E/WindowManager(9185): Activity com.firstgroup.applicationload.Appliacationload has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView{40d25790 G.E..... R.....ID 0,0-729,324} that was originally added here
10-23 01:22:37.435: E/WindowManager(9185): android.view.WindowLeaked: Activity com.firstgroup.applicationload.Appliacationload has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView{40d25790 G.E..... R.....ID 0,0-729,324} that was originally added here
10-23 01:22:37.435: E/WindowManager(9185):  at android.view.ViewRootImpl.<init>(ViewRootImpl.java:354)
10-23 01:22:37.435: E/WindowManager(9185):  at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:216)
10-23 01:22:37.435: E/WindowManager(9185):  at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:69)
10-23 01:22:37.435: E/WindowManager(9185):  at android.app.Dialog.show(Dialog.java:281)
10-23 01:22:37.435: E/WindowManager(9185):  at com.firstgroup.webservice.RequestTask.onPreExecute(RequestTask.java:36)
10-23 01:22:37.435: E/WindowManager(9185):  at android.os.AsyncTask.executeOnExecutor(AsyncTask.java:586)
10-23 01:22:37.435: E/WindowManager(9185):  at android.os.AsyncTask.execute(AsyncTask.java:534)
10-23 01:22:37.435: E/WindowManager(9185):  at com.firstgroup.applicationload.Appliacationload.onCreate(Appliacationload.java:37)
10-23 01:22:37.435: E/WindowManager(9185):  at android.app.Activity.performCreate(Activity.java:5104)
10-23 01:22:37.435: E/WindowManager(9185):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
10-23 01:22:37.435: E/WindowManager(9185):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
10-23 01:22:37.435: E/WindowManager(9185):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
10-23 01:22:37.435: E/WindowManager(9185):  at android.app.ActivityThread.access$600(ActivityThread.java:141)
10-23 01:22:37.435: E/WindowManager(9185):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
10-23 01:22:37.435: E/WindowManager(9185):  at android.os.Handler.dispatchMessage(Handler.java:99)
10-23 01:22:37.435: E/WindowManager(9185):  at android.os.Looper.loop(Looper.java:137)
10-23 01:22:37.435: E/WindowManager(9185):  at android.app.ActivityThread.main(ActivityThread.java:5041)
10-23 01:22:37.435: E/WindowManager(9185):  at java.lang.reflect.Method.invokeNative(Native Method)
10-23 01:22:37.435: E/WindowManager(9185):  at java.lang.reflect.Method.invoke(Method.java:511)
10-23 01:22:37.435: E/WindowManager(9185):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
10-23 01:22:37.435: E/WindowManager(9185):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
10-23 01:22:37.435: E/WindowManager(9185):  at dalvik.system.NativeStart.main(Native Method)

这是我的主要活动

package com.firstgroup.applicationload;


public class Appliacationload extends Activity implements WebserviceCallBack{

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.appliacationload);


        RequestTask callWebService=new RequestTask();
          callWebService.setObserver(this);
         callWebService.execute(ConstantVariable.dashboardWebServiceURL+"a/"+"arrival"+"?crsCode=vic");



    }

@Override
public void getWebserviceResponse(InputStream response) {
    // TODO Auto-generated method stub



}

}

public class RequestTask extends AsyncTask<String, String, InputStream>{
    private  WebserviceCallBack callBack;
    private ProgressDialog progressDialog;
    @Override
    protected void onPreExecute() {
        // TODO Auto-generated method stub
        progressDialog= new ProgressDialog((Context) callBack);
        super.onPreExecute();
        progressDialog.setTitle("Please Wait...");
        progressDialog.setMessage("Webservice Call...");
        progressDialog.setCancelable(true);
        progressDialog.show();
    }

    @Override
    protected InputStream doInBackground(String... uri) {
        HttpClient httpclient = new DefaultHttpClient();
        HttpResponse response;
        String responseString = null;
        try {
            response = httpclient.execute(new HttpGet(uri[0]));
            StatusLine statusLine = response.getStatusLine();
            if(statusLine.getStatusCode() == HttpStatus.SC_OK){
                /*Reader reader = new InputStreamReader(response.getEntity().getContent());
                Gson gson = new Gson();
                Holder response1 = gson.fromJson(reader, Holder.class);
                ByteArrayOutputStream out = new ByteArrayOutputStream();
                response.getEntity().writeTo(out);
                out.close();
                responseString = out.toString();*/
                return response.getEntity().getContent();
            } else{
                //Closes the connection.
                response.getEntity().getContent().close();
                throw new IOException(statusLine.getReasonPhrase());
            }
        } catch (ClientProtocolException e) {
            //TODO Handle problems..\
            progressDialog.hide();
        } catch (IOException e) {
            //TODO Handle problems..
            progressDialog.hide();
        }
        return null;
    }

    @Override
    protected void onPostExecute(InputStream result) {
        super.onPostExecute(result);
        //Do anything with response..
        progressDialog.hide();
        progressDialog=null;
        if(callBack!=null){
            callBack.getWebserviceResponse(result);
        }

    }
    public void setObserver(WebserviceCallBack callback){
        callBack=callback;
    }


}

json观察员：

  public interface WebserviceCallBack {
        public void getWebserviceResponse(InputStream result);

    }
I just

打电话给网络服务。我的电话回复得到了回复，但当我按下它时会崩溃为什么？

Answer 1

<强>更新

使用ProgressDialog.hide（）仅将其隐藏在屏幕上并且不会将其删除，意味着对话框仍然存在于窗口中，只是它不可见。

当您的活动完成时，即按下后退按钮时，您需要自己删除任何对话框。因此，请确保在退出活动时调用ProgressDialog.dismiss（）。

简而言之，您试图在Activity中显示一个不再存在或具有窗口焦点的对话框。

我可以看到你正在尝试运行RequestTask，我可以猜测在它的onPreExecute方法中有一个你想要显示的ProgressDialog。

根据您的目的，您可以选择一些方法来避免此问题：

如果您确实需要启动此任务，即使您的活动没有焦点，你可以简单地删除触及AsyncTask的onPreExecute，onProgressUpdate和onPostExecute中的UI线程的任何内容。然后，任务将在后台静默运行。
与上一个选项类似，您可以创建一个服务来在后台完成工作。
最后，如果您的活动暂停，您也可以选择不启动任务。

如何在android中按回按钮时删除后退按钮异常？

1 个答案: