Question

我是android开发的新手。我正在开发一个应用程序，它获取android GPS的当前坐标并将其发送到php中的web服务，该服务将数据（坐标+数据/时间）发送到MySQL数据库。

大部分都是完整的，应用程序正在运行并且发送坐标，但最终应用程序会休眠，就像15分钟后应用程序停止一样。

任何人都可以帮助我吗？这是代码：

ActivityMain.java

package com.example.administrador.app3;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.util.HashMap;
import java.util.Map;

import javax.net.ssl.HttpsURLConnection;



public class RequestHandler {

    //Method to send httpPostRequest
    //This method is taking two arguments
    //First argument is the URL of the script to which we will send the request
    //Other is an HashMap with name value pairs containing the data to be send with the request
    public String sendPostRequest(String requestURL,
                                  HashMap<String, String> postDataParams) {
        //Creating a URL
        URL url;

        //StringBuilder object to store the message retrieved from the server
        StringBuilder sb = new StringBuilder();
        try {
            //Initializing Url
            url = new URL(requestURL);

            //Creating an httmlurl connection
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();

            //Configuring connection properties
            conn.setReadTimeout(15000);
            conn.setConnectTimeout(15000);
            conn.setRequestMethod("POST");
            conn.setDoInput(true);
            conn.setDoOutput(true);

            //Creating an output stream
            OutputStream os = conn.getOutputStream();

            //Writing parameters to the request
            //We are using a method getPostDataString which is defined below
            BufferedWriter writer = new BufferedWriter(
                    new OutputStreamWriter(os, "UTF-8"));
            writer.write(getPostDataString(postDataParams));

            writer.flush();
            writer.close();
            os.close();
            int responseCode = conn.getResponseCode();

            if (responseCode == HttpsURLConnection.HTTP_OK) {

                BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream()));
                sb = new StringBuilder();
                String response;
                //Reading server response
                while ((response = br.readLine()) != null){
                    sb.append(response);
                }
            }

        } catch (Exception e) {
            e.printStackTrace();
        }
        return sb.toString();
    }

    public String sendGetRequest(String requestURL){
        StringBuilder sb =new StringBuilder();
        try {
            URL url = new URL(requestURL);
            HttpURLConnection con = (HttpURLConnection) url.openConnection();
            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(con.getInputStream()));

            String s;
            while((s=bufferedReader.readLine())!=null){
                sb.append(s+"\n");
            }
        }catch(Exception e){
        }
        return sb.toString();
    }

    public String sendGetRequestParam(String requestURL, String id){
        StringBuilder sb =new StringBuilder();
        try {
            URL url = new URL(requestURL+id);
            HttpURLConnection con = (HttpURLConnection) url.openConnection();
            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(con.getInputStream()));

            String s;
            while((s=bufferedReader.readLine())!=null){
                sb.append(s+"\n");
            }
        }catch(Exception e){
        }
        return sb.toString();
    }

    private String getPostDataString(HashMap<String, String> params) throws UnsupportedEncodingException {
        StringBuilder result = new StringBuilder();
        boolean first = true;
        for (Map.Entry<String, String> entry : params.entrySet()) {
            if (first)
                first = false;
            else
                result.append("&");

            result.append(URLEncoder.encode(entry.getKey(), "UTF-8"));
            result.append("=");
            result.append(URLEncoder.encode(entry.getValue(), "UTF-8"));
        }

        return result.toString();
    }
}

RequestHandler.java

package com.example.administrador.app3;


public class Config {
    public static final String URL_ADD = "***my_url_page_with_the_php_code***";

    //keys that will be used to send the request to php scripts
    public static final String KEY_EMP_LAT = "lat";
    public static final String KEY_EMP_LNG = "lng";


}

Config.java

library(MASS)
n = 100
mu = c(4,5)
Sigma = matrix(c(3,2, 2,3), nrow=2)

plot(mvrnorm(n=n, mu=mu, Sigma=Sigma))

事先谢谢！

Answer 1

现在您正在从您的活动中获取位置更新，但当您的手机进入休眠状态时，您的活动将停止，因此更新将会停止。

您需要使用PendingIntent方法的requestLocationUpdates()版本。请检查此link。

此方法适用于后台用例，更具体地说，适用于接收位置更新，即使应用程序已被系统杀死也是如此。

您必须制作IntentService或BroadcastReceiver才能继续获取位置信息。

使用PHP将Web GPS坐标发送到WebService，每5分钟无应用程序睡眠

1 个答案: