php - PHP等待信号并从Android App重定向

Question

我正在尝试开发一个 Android 应用程序，但我觉得有点卡在实现细节上。

我希望应用程序与 Web 服务器 (LAMP) 连接。然后，我的 PHP 页面将等待来自我的 Android 设备的信号，并在触发事件时重定向页面。

经过一番研究，我已经扣除了插座之一，尽管我不太确定。Android 设备连接到服务器上的套接字，并在事件完成时发送重定向信号。有没有其他方法可以做到这一点？

此外，我对服务器语言的其他用途是处理 POST 请求并将它们提交到数据库。有没有比 PHP 更适合的语言？

Answer 1

您可以简单地使用 SDK 中包含的 http 库。有关示例，请参见下面的代码。我使用它来登录、注册、将事件添加到日历以及获取事件。

import java.util.ArrayList;
import java.util.List;

import org.apache.http.NameValuePair;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONObject;

import android.content.Context;
 import android.util.Log;

public class UserFunctions {

private JSONParser jsonParser;

// Testing in localhost using wamp or xampp
// use http://10.0.2.2/ to connect to your localhost ie http://localhost/
private static String loginURL = "http://xxx.com/android/login.php";
private static String registerURL = "http://xxx.com/android/login.php";
private static String createURL = "http://xxx.com/android/login.php";
private static String getEventURL = "http://xxx.com/android/login.php";

private static String login_tag = "login";
private static String create_tag = "create_event";
private static String register_tag = "register";

// constructor
public UserFunctions(){
    jsonParser = new JSONParser();
}

/**
 * function make Login Request
 * @param email
 * @param password
 * */
public JSONObject loginUser(String email, String password){
    // Building Parameters
    List<NameValuePair> params = new ArrayList<NameValuePair>();
    params.add(new BasicNameValuePair("tag", login_tag));
    params.add(new BasicNameValuePair("email", email));
    params.add(new BasicNameValuePair("password", password));
    JSONObject json = jsonParser.getJSONFromUrl(loginURL, params);
    // return json
    if(json !=null)
        Log.e("JSON", json.toString());
    return json;
}

public JSONObject getEvents(String lon, String lat, String uid, String page){
    // Building Parameters
    Log.e("steve","public JSONObject getEvents(String lon, String lat, String uid)");
    List<NameValuePair> params = new ArrayList<NameValuePair>();
    params.add(new BasicNameValuePair("tag", "get_events"));
    params.add(new BasicNameValuePair("lon", lon));
    params.add(new BasicNameValuePair("lat", lat));
    params.add(new BasicNameValuePair("uid", uid));
    params.add(new BasicNameValuePair("page", page));
    //Log.e("steve","Get Events");
    JSONObject json = jsonParser.getJSONFromUrl(getEventURL, params);
    // return json
    if(json !=null)
        Log.e("JSON", json.toString());
    return json;
}

public JSONObject attendEvent(String uid, String eid){
    // Building Parameters

    List<NameValuePair> params = new ArrayList<NameValuePair>();
    params.add(new BasicNameValuePair("tag", "attend_event"));

    params.add(new BasicNameValuePair("uid", uid));
    params.add(new BasicNameValuePair("eid", eid));

    Log.e("steve","U="+uid+"E="+eid);
    JSONObject json = jsonParser.getJSONFromUrl(getEventURL, params);
    // return json
    if(json !=null)
        Log.e("JSON", json.toString());
    return json;
}
public JSONObject getAttendance(String uid, String eid){
    // Building Parameters

    List<NameValuePair> params = new ArrayList<NameValuePair>();
    params.add(new BasicNameValuePair("tag", "get_attendance"));

    params.add(new BasicNameValuePair("uid", uid));
    params.add(new BasicNameValuePair("eid", eid));

    Log.e("steve","U="+uid+"E="+eid);
    JSONObject json = jsonParser.getJSONFromUrl(getEventURL, params);
    // return json
    if(json !=null)
        Log.e("JSON", json.toString());
    return json;
}

/**
 * function make Login Request
 * @param name
 * @param email
 * @param password
 * */
public JSONObject registerUser(String fname, String lname, String email, String password){
    // Building Parameters
    List<NameValuePair> params = new ArrayList<NameValuePair>();
    params.add(new BasicNameValuePair("tag", register_tag));
    params.add(new BasicNameValuePair("fname", fname));
    params.add(new BasicNameValuePair("lname", lname));
    params.add(new BasicNameValuePair("email", email));
    params.add(new BasicNameValuePair("password", password));

    // getting JSON Object
    JSONObject json = jsonParser.getJSONFromUrl(registerURL, params);
    // return json
    return json;
}

public JSONObject createEvent(String name, String edate, String etime, String edesc, String loc, String lon, String lat, String uid){
    // Building Parameters
    List<NameValuePair> params = new ArrayList<NameValuePair>();
    params.add(new BasicNameValuePair("tag", create_tag));
    params.add(new BasicNameValuePair("name", name));
    params.add(new BasicNameValuePair("date", edate));
    params.add(new BasicNameValuePair("time", etime));
    params.add(new BasicNameValuePair("desc", edesc));        
    params.add(new BasicNameValuePair("loc", loc));        
    params.add(new BasicNameValuePair("lon", lon));        
    params.add(new BasicNameValuePair("lat", lat));        
    params.add(new BasicNameValuePair("uid", uid));        

    // getting JSON Object
    JSONObject json = jsonParser.getJSONFromUrl(createURL, params);
    if(json !=null)
        Log.e("JSON", json.toString());
    // return json
    return json;
}

/**
 * Function get Login status
 * */
public boolean isUserLoggedIn(Context context){
    DatabaseHandler db = new DatabaseHandler(context);
    int count = db.getRowCount();
    if(count > 0){
        // user logged in
        return true;
    }
    return false;
}

/**
 * Function to logout user
 * Reset Database
 * */
public boolean logoutUser(Context context){
    DatabaseHandler db = new DatabaseHandler(context);
    db.resetTables();
    return true;
}

}