Android利用Jpush实现异地登陆下线
一、说明
- 客户端程序中使用了xUtils框架(进行UI,资源的绑定,以及访问网络)
- JPush客户端集成可参照:http://docs.jiguang.cn/jpush/client/Android/android_guide/
- JPush服务器端集成参照:http://docs.jiguang.cn/jpush/server/3rd/java_sdk/
- xUtils下载及使用:https://github.com/wyouflf/xUtils3
二、客户端
2.1 添加依赖
compile 'cn.jiguang:jpush:2.1.8'
compile 'org.xutils:xutils:3.3.36'
2.2 创建MyApplication,初始化jpush以及xutils
MyApplication.java
package com.gcy.offsitelanding.offsitelanding; import android.app.Application; import org.xutils.x; import cn.jpush.android.api.JPushInterface; /** * Created by gcy71 on 2016/10/9. */ public class MyApplication extends Application { @Override public void onCreate() { super.onCreate(); JPushInterface.setDebugMode(true); JPushInterface.init(this); /*xUtils 初始化*/ x.Ext.init(this); x.Ext.setDebug(BuildConfig.DEBUG); } }
MyApplication.java写完后,还需将其在AndroidManifest.xml中配置,直接在application尖括号里添加如下代码:
android:name=".MyApplication"
2.3 创建自定义Receiver
客户端向服务器端发起登录请求后,服务器端若发现该账号已处于登录状态时,服务器会向当前账户在线的终端推送一条自定义消息,如果没有自定义Receiver的话,客户端将不会对该自定义消息进行处理。
JpushReceiver.java
package com.gcy.offsitelanding.offsitelanding; import android.app.NotificationManager; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.os.Bundle; import android.util.Log; import cn.jpush.android.api.JPushInterface; public class JpushReceiver extends BroadcastReceiver { private NotificationManager nm; @Override public void onReceive(Context context, Intent intent) { if (null == nm) { nm = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE); } Bundle bundle = intent.getExtras(); // Log.d(TAG, "onReceive - " + intent.getAction() + ", extras: " + AndroidUtil.printBundle(bundle)); if (JPushInterface.ACTION_REGISTRATION_ID.equals(intent.getAction())) { //Log.d(TAG, "JPush用户注册成功"); } else if (JPushInterface.ACTION_MESSAGE_RECEIVED.equals(intent.getAction())) { Log.d("jpush" , bundle.getString(JPushInterface.EXTRA_MESSAGE) + "自定义消息"); Intent mIntent = new Intent(context, MainActivity.class); //mIntent.putExtra("intentType", 0); mIntent.putExtra("MessageContent",bundle.getString(JPushInterface.EXTRA_MESSAGE)); mIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); context.startActivity(mIntent); } else if (JPushInterface.ACTION_NOTIFICATION_RECEIVED.equals(intent.getAction())) { //Log.d(TAG, "接受到推送下来的通知"); } else if (JPushInterface.ACTION_NOTIFICATION_OPENED.equals(intent.getAction())) { //Log.d(TAG, "用户点击打开了通知"); } else { //Log.d(TAG, "Unhandled intent - " + intent.getAction()); } } }
JpushReceiver书写完毕后,我们仍需在AndroidManifest.xml中配置该Recevier
<!-- User defined. 用户自定义的广播接收器--> <receiver android:name="com.gcy.offsitelanding.offsitelanding.JpushReceiver" android:enabled="true"> <intent-filter> <!-- Required 用户注册SDK的intent --> <action android:name="cn.jpush.android.intent.REGISTRATION" /> <action android:name="cn.jpush.android.intent.UNREGISTRATION" /> <!-- Required 用户接收SDK消息的intent --> <action android:name="cn.jpush.android.intent.MESSAGE_RECEIVED" /> <!-- Required 用户接收SDK通知栏信息的intent --> <action android:name="cn.jpush.android.intent.NOTIFICATION_RECEIVED" /> <!-- Required 用户打开自定义通知栏的intent --> <action android:name="cn.jpush.android.intent.NOTIFICATION_OPENED" /> <!-- Optional 用户接受Rich Push Javascript 回调函数的intent --> <action android:name="cn.jpush.android.intent.ACTION_RICHPUSH_CALLBACK" /> <!-- 接收网络变化 连接/断开 since 1.6.3 --> <action android:name="cn.jpush.android.intent.CONNECTION" /> <category android:name="您的程序包名" /> </intent-filter> </receiver> 2.4 布局文件以及MainActivity代码 activity_main.xml <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/activity_main" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:gravity="center"> <EditText android:layout_width="match_parent" android:layout_height="wrap_content" android:hint="账号" android:id="@+id/login_username"/> <EditText android:layout_width="match_parent" android:layout_height="wrap_content" android:hint="密码" android:id="@+id/login_pwd"/> <Button android:layout_width="match_parent" android:layout_height="wrap_content" android:text="登录" android:id="@+id/login" /> </LinearLayout>
MainActivity.java
package com.gcy.offsitelanding.offsitelanding; import android.content.ContentValues; import android.content.DialogInterface; import android.os.AsyncTask; import android.support.v7.app.AlertDialog; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.Toast; import org.xutils.common.Callback; import org.xutils.http.RequestParams; import org.xutils.view.annotation.ViewInject; import org.xutils.x; import java.net.HttpURLConnection; import java.util.ArrayList; import java.util.List; import cn.jpush.android.api.JPushInterface; public class MainActivity extends AppCompatActivity { String url = "http://169.254.97.133:8080/offsitelanding_server/LoginServlet"; /** * @ViewInject注解 * xUtils使用注解方式就可以进行UI,资源的绑定,替代findViewById() */ @ViewInject(R.id.login_username) private EditText loginUserName; @ViewInject(R.id.login_pwd) private EditText loginPwd; @ViewInject(R.id.login) private Button loginBtn; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); x.view().inject(this); init(); } public void init(){ loginBtn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { //利用xUtils访问网络(post请求) RequestParams params = new RequestParams(url); params.addParameter("username" , loginUserName.getText().toString()); params.addParameter("password" , loginPwd.getText().toString()); params.addParameter("registrationId" , JPushInterface.getRegistrationID(MainActivity.this)); x.http().post(params, new Callback.CommonCallback<String>() { @Override public void onSuccess(String result) { Toast.makeText(MainActivity.this , "登录成功" , Toast.LENGTH_LONG).show(); } @Override public void onError(Throwable ex, boolean isOnCallback) { Toast.makeText(MainActivity.this , "登陆失败" , Toast.LENGTH_LONG).show(); } @Override public void onCancelled(CancelledException cex) { } @Override public void onFinished() { } }); } }); //利用Intent判断是否有自定义消息 String message = getIntent().getStringExtra("MessageContent"); if(message != null && !message.equals("")){ //如果有,则弹出对话框,提示用户下线 new AlertDialog.Builder(this).setTitle("系统提示").setMessage(message).setPositiveButton("确定", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { //在这里可清除本地的用户信息 } }).setNegativeButton("重新登录", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { //再次执行登录操作 } }).show(); } }
三、服务器端
3.1 说明
- 首先创建一个Dynamic Web project。
- 服务器器端集成jpush需要注意依赖包:gosn、log4j、slf4j,本例的服务器端程序为使用的是servlet实现。
- 本例未使用数据库,采用一个集合(users)来存储用户信息。
- 本例的实体类User(username : 用户名 , password : 密码 , status : 在线状态 , registrationId : 用户在线的设备ID(指在Jpush上注册的ID))。
3.2 处理逻辑
- Servlet接收客户端传来的参数(username , password , registrationId)。
- Servlet判断是否存在该用户,若存在跳转到3,若不存在,返回用户不存在
- 判断用户输入的密码是否正确,若不正确返回密码错误,若正确跳转到4
- 判断当前用户是否处于在线状态,若不在线,执行登陆操作添加在线终端ID,若在线,则通知下线,并执行登录操作,修改用户在线终端ID。
3.3 LoginServlet的编写
LoginServlet.java
package com.gcy.offsitelanding_server; import java.io.IOException; import java.io.PrintWriter; import java.util.ArrayList; import java.util.List; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import cn.jiguang.common.resp.APIConnectionException; import cn.jiguang.common.resp.APIRequestException; import cn.jpush.api.JPushClient; import cn.jpush.api.push.model.Message; import cn.jpush.api.push.model.Platform; import cn.jpush.api.push.model.PushPayload; import cn.jpush.api.push.model.audience.Audience; @WebServlet("/LoginServlet") public class LoginServlet extends HttpServlet { private static final long serialVersionUID = 1L; private List<User> users = new ArrayList<User>(); public LoginServlet() { super(); users.add(new User("user01", "123456", 0)); users.add(new User("user02", "123456", 0)); users.add(new User("user03", "123456", 0)); } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.getWriter().append("Served at: ").append(request.getContextPath()); } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); response.setContentType("text/html"); response.setCharacterEncoding("UTF-8"); PrintWriter out = response.getWriter(); String username = request.getParameter("username"); String password = request.getParameter("password"); String registrationId = request.getParameter("registrationId"); User user = findUserByName(username); if(user == null){ out.println("The current user does not exist"); }else{ if(user.getPassword().equals(password)){ //登录成功,若当前用户在其他地方登录,应向其推送消息并将其下线 if(user.getStatus() == 1){ //这里注意:两个字符串前面是masterSecret , 后面是appKey JPushClient jPushClient = new JPushClient("0bdecb00531ec118a7b982db", "f9ad20faed32beed296a71bd"); PushPayload payload = PushPayload.newBuilder().setPlatform(Platform.all()).setAudience(Audience.registrationId(user.getRegistrationId())) .setMessage(Message.newBuilder().setMsgContent("你的账号在另一台手机上登陆,请确认你的账号和密码是否泄露!!").build()).build(); try { jPushClient.sendPush(payload); } catch (APIConnectionException | APIRequestException e) { e.printStackTrace(); } }else{ user.setStatus(1); } user.setRegistrationId(registrationId); System.out.println(registrationId); out.print("success"); }else{ out.println("Account and password do not match"); } } } public User findUserByName(String userName){ for(User u : users){ if(u.getUsername().equals(userName)){ return u; } } return null; } }
3.4 实体类User
User.java
package com.gcy.offsitelanding_server; public class User { private String username; private String password; private String registrationId;//用户登录的设备(在jpush上的注册ID) private int status;//登录状态,0-离线 1-在线 public User() { super(); } public User(String username, String password, int status) { super(); this.username = username; this.password = password; this.status = status; } public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public int getStatus() { return status; } public void setStatus(int status) { this.status = status; } public String getRegistrationId() { return registrationId; } public void setRegistrationId(String registrationId) { this.registrationId = registrationId; } }