android - Android:带有AlarmManager和Service的AsyncTask

我想每隔60秒定期使用HttpURLConnection api将JSON字符串发布到localhost服务器（WAMP），以将其插入数据库中。因此，我正在从计时器方法执行MyAsyncTask。在AlarmManager和Service的帮助下实现该方法是更好的方法，还是足以满足我的目的？

感谢您的帮助。

PostData类：

 package com.bustracker;

    import java.io.DataOutputStream;
    import java.io.IOException;
    import java.net.HttpURLConnection;
    import java.net.URL;

    import android.os.AsyncTask;
    import android.os.Handler;

        public class PostData {
            String jSONString;
            Handler handler = new Handler();

            public PostData(String jSONString) {
                super();
                this.jSONString = jSONString;
            }

            public String getjSONString() {
                return jSONString;
            }

            public void setjSONString(String jSONString) {
                this.jSONString = jSONString;
            }

      public void timer() {

    new Thread(new Runnable() {
        @Override
        public void run() {
            boolean run = true;
            while (run) {
               handler.postDelayed(new Runnable() {
                   @Override
                   public void run() {
                       new MyAsyncTask().execute(jSONString);
                   }
               }, 5000);
            }
        }
    }).start();
}

            class MyAsyncTask extends AsyncTask<String, Integer, Void> {

                @Override
                protected Void doInBackground(String... params) {
                    // TODO Auto-generated method stub

                    try {
                        //This is the ip address of my laptop wifi because I am running the app in my device and I want to send the data to the localhost server(WAMP).
                        URL myUrl = new URL("http://192.168.127.56/webservice");
                        HttpURLConnection myConnection = (HttpURLConnection) myUrl
                                .openConnection();
                        myConnection.setRequestMethod("POST");
                        myConnection.setDoOutput(true);
                        myConnection.setUseCaches(false);
                        myConnection.setConnectTimeout(10000);
                        myConnection.setReadTimeout(10000);
                        myConnection.setRequestProperty("Content-Type",
                                "application/json");
                        myConnection.connect();
                        // create data output stream
                        DataOutputStream wr = new DataOutputStream(
                                myConnection.getOutputStream());
                        // write to the output stream from the string
                        wr.writeBytes(jSONString);
                        wr.close();
                    } catch (IOException e) {

                        e.printStackTrace();
                    }
                    return null;

                }

            }

        }

传递给PostData类的JSON字符串：

    {
      "latitude":41.86907321,
      "longitude":16.66542435,
      "formatted":"22.04.2015 11:11:00",
       "route":4
    }

编辑：

该代码在MainActivity的内部类“ MyLocationListern”的onChanedLocation中被调用：

        String jSONString = convertToJSON(pLong, pLat, formatted);
        PostData sender = new PostData(jSONString);
        Intent intent3 = new Intent(MainActivity.this, PostData.class);
        PendingIntent pintent3 = PendingIntent.getService(getApplicationContext(), 0, intent3, 0);
        AlarmManager alarm3 = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
        Calendar cal = Calendar.getInstance();
        // for 30 mint 60*60*1000
        alarm3.setRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(),
                1000, pintent3);

        startService(new Intent(getBaseContext(), PostData.class));

具有IntentService的新PostData类：

package com.bustracker;

import java.io.DataOutputStream;
import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.URL;

import android.app.IntentService;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Handler;

public class PostData extends IntentService {
    String jSONString;
    Handler handler = new Handler();

    public PostData(String jSONString) {
        super("some");
        this.jSONString = jSONString;
    }

    public String getjSONString() {
        return jSONString;
    }

    public void setjSONString(String jSONString) {
        this.jSONString = jSONString;
    }


    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        new MyAsyncTask().execute(jSONString);

        return super.onStartCommand(intent, flags, startId);
    }
    @Override
    protected void onHandleIntent(Intent intent) {
        // TODO Auto-generated method stub

    }

    class MyAsyncTask extends AsyncTask<String, Integer, Void> {

        @Override
        protected Void doInBackground(String... params) {
            // TODO Auto-generated method stub

            try {
                //This is the ip address of my laptop wifi because I am running the app in my device and I want to send the data to the localhost server(WAMP).
                URL myUrl = new URL("http://192.168.x.x/webservice");
                HttpURLConnection myConnection = (HttpURLConnection) myUrl
                        .openConnection();
                myConnection.setRequestMethod("POST");
                myConnection.setDoOutput(true);
                myConnection.setUseCaches(false);
                myConnection.setConnectTimeout(10000);
                myConnection.setReadTimeout(10000);
                myConnection.setRequestProperty("Content-Type",
                        "application/json");
                myConnection.connect();
                // create data output stream
                DataOutputStream wr = new DataOutputStream(
                        myConnection.getOutputStream());
                // write to the output stream from the string
                wr.writeBytes(jSONString);
                wr.close();
            } catch (IOException e) {

                e.printStackTrace();
            }
            return null;

        }

    }



}

最佳答案

首先，我们创建这样的服务

public class ChatSevice extends IntentService{

    public ChatSevice() {
        super("Some");
    }



    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        // TODO Auto-generated method stub

        //this is asynk task class
        new ChatConnect(ChatSevice.this).execute();

        return super.onStartCommand(intent, flags, startId);
    }

    @Override
    protected void onHandleIntent(Intent intent) {
        // TODO Auto-generated method stub

    }




}

现在以这种方式调用此服务

Intent intent3 = new Intent(this, ChatSevice.class);
        PendingIntent pintent3 = PendingIntent.getService(this, 0, intent3, 0);
        AlarmManager alarm3 = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
        // for 30 mint 60*60*1000
        alarm3.setRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(),
                1000, pintent3);

        startService(new Intent(getBaseContext(), ChatSevice.class));