Question

我有一个dotNet webservice，每隔几分钟运行一次，返回一些xml数据

我构建了一个ASyncTask类，它将请求数据提交给Web服务，它可以很好地提交数据

然后，Web服务每2分钟提取一次数据以提供响应

我构建了另一个ASyncTask类来访问webservice以获取响应数据，但是当我在计时器上运行ASyncTask时，它会在应用程序首次重试时崩溃，说该任务已在运行

public class GetPaymentsResult extends AsyncTask<Integer, Void, String>{

MainActivity mainActivity = MainActivity.getInstance();
public String SOAP_ACTION = "https://webservice/method";
public String METHOD_NAME = "method";
public String NAMESPACE = "https://webservice/";
public String URL = "https://webservice/payments.asmx";
private SoapObject request;
private HttpTransportSE httpTransport;
private SoapSerializationEnvelope envelope;
public Object response = null;
public static String resultinfo;

@Override
protected String doInBackground(Integer... params){
    resultinfo = null;
    request = new SoapObject(NAMESPACE, METHOD_NAME);
    PropertyInfo pi = new PropertyInfo();
    PropertyInfo pi2 = new PropertyInfo();
    pi.setName("RequestID");        
    pi.setValue(010101);
    pi.setType(Integer.class);
    request.addProperty(pi);
    pi2.setName("APIKey");
    pi2.setValue("1234-1234-1234");
    pi2.setType(String.class);
    request.addProperty(pi2);
    envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
    envelope.dotNet = true;
    envelope.setOutputSoapObject(request);
    httpTransport = new HttpTransportSE(URL);
    try{
        httpTransport.call(SOAP_ACTION, envelope);
        response = envelope.getResponse();
    }catch(Exception e){
        e.printStackTrace();
        response = e.getMessage();
    }
    return response.toString();
}

@Override
protected void onPostExecute(final String result){
    super.onPostExecute(result);
    mainActivity.getHandler().post(new Runnable() {
        @Override
        public void run() {
            System.out.println(result);               
            resultinfo = result;
        }
    });
}
}

我正在使用倒数计时器每十秒左右调用一次这个任务：

public CountDownTimer timer(){
    CountDownTimer times = new CountDownTimer(10000, 20) {
        @Override
        public void onTick(long millisUntilFinished) {                
        }
        @Override
        public void onFinish() {                
            checkPaymentreturn();
        }
    }.start();
    return times;
}

我确信我应该采取正确的方式，有人可以帮忙吗？

这是我收到的错误：

**08-09 11:37:21.169 17098-17098/com.app E/AndroidRuntime: FATAL EXCEPTION: main
                                                            Process: com.app, PID: 17098
                                                            java.lang.IllegalStateException: Cannot execute task: the task has already been executed (a task can be executed only once)
                                                                at android.os.AsyncTask.executeOnExecutor(AsyncTask.java:579)
                                                                at android.os.AsyncTask.execute(AsyncTask.java:535)
                                                                at com.app.ui.CitationFragment$1.onFinish(CitationFragment.java:179)
                                                                at android.os.CountDownTimer$1.handleMessage(CountDownTimer.java:127)
                                                                at android.os.Handler.dispatchMessage(Handler.java:102)
                                                                at android.os.Looper.loop(Looper.java:145)
                                                                at android.app.ActivityThread.main(ActivityThread.java:5944)
                                                                at java.lang.reflect.Method.invoke(Native Method)
                                                                at java.lang.reflect.Method.invoke(Method.java:372)
                                                                at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1399)
                                                                at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1194)

Answer 1

我发现我在类的顶部实例化任务并且每次都从同一个实例调用execute，但是如果我每次想要调用任务时都将任务设置为new，那就像魅力< / p>

android - 每隔几秒就解析一次dotnet webservice

1 个答案: