我怎么能调用一个方法，每5秒在android系统？ [英] How can I invoke a method every 5 seconds in android?

问题描述

我在必须发送GPS位置每5秒到服务器时，我选择（自动上发送按钮）的应用程序工作。我是新与Android，所以我不知道我怎么可以开/关按钮，我怎么能调用发送每隔5秒钟数据的方法时，按钮上。

它必须调用每5秒的方法：

 公共无效POSTDATA（）抛出ClientProtocolException，IOException异常，异常{
    字符串的经度=UK;
    字符串纬度=UK;
    字符串altitiude =UK;
    字符串时间=;
    串速度=;    getCurrentLocation（）; //获取当前位置和更新mobileLocation变量    如果（mobileLocation！= NULL）{
        locManager.removeUpdates（locListener）; //这需要停止获取位置数据和节省电池电量。         经度=+ mobileLocation.getLongitude（）;
         纬度=+ mobileLocation.getLatitude（）;
         altitiude =+ mobileLocation.getAltitude（）;
        串精度=精度+ mobileLocation.getAccuracy（）;
        时间=+ mobileLocation.getTime（）;
         速度=+（int）的（4 * mobileLocation.getSpeed​​（））;        editTextShowLocation.setText（经度+\\ n+纬度+\\ n
                + altitiude +\\ n+准确+\\ n+时间+\\ n+速度）;
    }其他{
        editTextShowLocation.setText（对不起，位置没有确定）;    }
        字符串URL = \"http://www.itrack.somee.com/post.aspx?id=\"+\"f1\"+\"&long=\"+longitude+\"&lat=\"+latitude+\"&alt=\"+altitiude+\"&speed=\"+speed;        //创建一个新的HttpClient和邮政头
        HttpClient的HttpClient的=新DefaultHttpClient（）;
        HttpPost httppost =新HttpPost（URL）;        尝试{        //执行HTTP POST请求
        HTT presponse响应= httpclient.execute（httppost）;        }赶上（ClientProtocolException E）{
        // TODO自动生成catch块
        }赶上（IOException异常五）{
        // TODO自动生成catch块
        }}
 

解决方案

我曾经面临完全一样的问题，周期性地发送位置。我用的处理程序和方法postDelayed

我的code的定期调用部分看起来是这样的：

 私人最终FIVE_SECONDS = 5000;
公共无效scheduleSendLocation（）{
    handler.postDelayed（新的Runnable（）{
        公共无效的run（）{
            sendLocation（）; //此方法将包含您几乎完成HTTP调用
            handler.postDelayed（这一点，FIVE_SECONDS）;
        }
    }，FIVE_SECONDS）;
}
 

然后你只需要调用scheduleSendLocation当你要开始你的时间的电话。

I'm working in an application which must send a GPS location every 5 seconds to the server when I choose (auto send button on). I'm new with android so I don't know how I can make an on/off button and how can I invoke the method that sends the data every 5 seconds when the button is on.

The method which it must invoke every 5 seconds:

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
        }



}

解决方案

I have faced exactly the same problem, sending location periodically. I've used a handler and its postDelayed method.

The periodic call part of my code looks like this:

private final 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);
}

Then you just need to call scheduleSendLocation when you want to start your period calls.

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