Java ANDROID：插入日期字符串以获取Url后代码不起作用

我正在制作一个android客户端，每10秒向我的服务器报告一次它的位置。 对于服务器，我使用动态DNS。我必须发送纬度、经度和时间戳作为GET参数。 我制作了以下工作代码： 包位于.kirancity.trackapp中

import java.io.ByteArrayOutputStream;
import java.io.IOException;

import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.StatusLine;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;

import android.app.Activity;
import android.content.Context;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.Menu;
import android.widget.TextView;

public class MainActivity extends Activity
{

TextView textLat;
TextView textLong;
TextView textRes;

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

    textLat = (TextView)findViewById(R.id.textLat);
    textLong = (TextView)findViewById(R.id.textLong);
    textRes = (TextView)findViewById(R.id.textRes);

    LocationManager lm = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
    LocationListener ll = new myLocationListener();
    lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 10000, 0, ll);
}

    class myLocationListener implements LocationListener{
        @Override
        public void onLocationChanged(Location arg0)
        {
            if(arg0 != null)
            {
                double plong = arg0.getLongitude();
                double plat = arg0.getLatitude();
                String url = "http://vishalhome.myftp.org/insert.php?la="+Double.toString(plat)+"&ln="+Double.toString(plong)+"&d='Arbitrary'";
                textLat.setText(Double.toString(plat));
                textLong.setText(Double.toString(plong));
                new RequestTask().execute(url);
             }
        }

        @Override
        public void onProviderDisabled(String arg0) {
            // TODO Auto-generated method stub

        }

        @Override
        public void onProviderEnabled(String arg0) {
            // TODO Auto-generated method stub

        }

        @Override
        public void onStatusChanged(String arg0, int arg1, Bundle arg2) {
            // TODO Auto-generated method stub

        }
}
class RequestTask extends AsyncTask<String, String, String>
{

        @Override
        protected String 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){
                    ByteArrayOutputStream out = new ByteArrayOutputStream();
                    response.getEntity().writeTo(out);
                    out.close();
                    responseString = out.toString();
                } else{
                    //Closes the connection.
                    response.getEntity().getContent().close();
                    throw new IOException(statusLine.getReasonPhrase());
                }
            } catch (ClientProtocolException e) {
                responseString = e.toString();
            } catch (IOException e) {
                responseString = e.toString();
            }
            return responseString;
        }

        @Override
        protected void onPostExecute(String result) {
            TextView tv=(TextView)findViewById(R.id.textRes);
            tv.setText(result);
        }
}

@Override
public boolean onCreateOptionsMenu(Menu menu)
{
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

}

应用程序在发生位置更改事件时崩溃。 我试着设置试抓挡块，但没有问题的线索。 我认为在调用newrequesttask（url）之后问题就出现了。

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请协助

我认为您应该在使用url之前对其进行编码。试试这个：

currentDateandTime = URLEncoder.encode(currentDateandTime, "utf-8");
url = url + currentDateandTime + "\'";

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请参见

非常感谢，您的解决方案对我很有效。今天是提交此完整项目的截止日期。：）你知道如何在这段代码中获得高精度的定位吗？我在某个地方读到，我需要将enableHighAccurance=“true”放在某个地方。欢迎。我想你可以试试清单文件。祝项目顺利！以获得准确的位置。链接可能会帮助你。实际上，我上面的代码返回29.88971027，77.96007911精度。虽然我希望它发送像29.891796984361115，77.95791149139404需要帮助

currentDateandTime = URLEncoder.encode(currentDateandTime, "utf-8");
url = url + currentDateandTime + "\'";