如何在android中每5秒调用一次方法？

Question

我在一个应用程序中工作,当我选择(自动发送按钮打开)时,该应用程序必须每5秒向服务器发送一个GPS位置.我是android的新手,所以我不知道如何制作开/关按钮,如何在按钮打开时调用每5秒发送一次数据的方法.

它必须每5秒调用一次的方法:

public void postData() throws ClientProtocolException, IOException, Exception {


    String longitude="UK";
    String latitude="UK";
    String altitiude="UK";
    String time="";
    String speed="";

    getCurrentLocation(); // gets the current location and update mobileLocation variables

    if (mobileLocation != null) {
        locManager.removeUpdates(locListener); // This needs to stop getting the location data and save the battery power.

         longitude = ""+mobileLocation.getLongitude();
         latitude = "" + mobileLocation.getLatitude();
         altitiude = "" + mobileLocation.getAltitude();
        String accuracy = "Accuracy" + mobileLocation.getAccuracy();
        time = "" + mobileLocation.getTime();
         speed =""+ (int)(4*mobileLocation.getSpeed());

        editTextShowLocation.setText(longitude + "\n" + latitude + "\n"
                + altitiude + "\n" + accuracy + "\n" + time+ "\n" + speed);
    } else {
        editTextShowLocation.setText("Sorry, location is not determined");

    }
        String url = "http://www.itrack.somee.com/post.aspx?id="+"f1"+"&long="+longitude+"&lat="+latitude+"&alt="+altitiude+"&speed="+speed;



        // Create a new HttpClient and Post Header
        HttpClient httpclient = new DefaultHttpClient();
        HttpPost httppost = new HttpPost(url);

        try {

        // Execute HTTP Post Request
        HttpResponse response = httpclient.execute(httppost);

        } catch (ClientProtocolException e) {
        // TODO Auto-generated catch block
        } catch (IOException e) {
        // TODO Auto-generated catch block
        }



}

Answer 1

我遇到了完全相同的问题,定期发送位置.我使用过处理程序及其postDelayed方法.

我的代码的定期调用部分如下所示:

private final int FIVE_SECONDS = 5000;
public void scheduleSendLocation() {
    handler.postDelayed(new Runnable() {
        public void run() {
            sendLocation();          // this method will contain your almost-finished HTTP calls
            handler.postDelayed(this, FIVE_SECONDS);
        }
    }, FIVE_SECONDS);
}

然后,scheduleSendLocation当您想要开始期间通话时,您只需要打电话.