package myself.mqtt.wenzheng.studio.mqtt;

import android.app.Notification;
import android.app.NotificationManager;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.os.IBinder;
import android.os.Message;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v4.app.NotificationCompat;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.support.design.widget.NavigationView;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.RemoteViews;
import android.widget.Toast;

import org.eclipse.paho.client.mqttv3.IMqttDeliveryToken;
import org.eclipse.paho.client.mqttv3.MqttCallback;
import org.eclipse.paho.client.mqttv3.MqttClient;
import org.eclipse.paho.client.mqttv3.MqttConnectOptions;
import org.eclipse.paho.client.mqttv3.MqttException;
import org.eclipse.paho.client.mqttv3.MqttMessage;
import org.eclipse.paho.client.mqttv3.persist.MemoryPersistence;

import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;

public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
private String host = "tcp://60.205.203.64:1883";
private String userName = "admin";
private String passWord = "public";
private int i = 1;
private Handler handler;
private MqttClient client;
private String myTopic = "test/topic";
private MqttConnectOptions options;
private ScheduledExecutorService scheduler;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
init();
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});

    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer\_layout);  
    ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(  
            this, drawer, toolbar, R.string.navigation\_drawer\_open, R.string.navigation\_drawer\_close);  
    drawer.addDrawerListener(toggle);  
    toggle.syncState();  
    NavigationView navigationView = (NavigationView) findViewById(R.id.nav\_view);  
    navigationView.setNavigationItemSelectedListener(this);  
    handler = new Handler(){  
        @Override  
        public void handleMessage(Message msg) {  
            super.handleMessage(msg);  
            if (msg.what == 1) {  
                Toast.makeText(MainActivity.this, (String) msg.obj,  
                        Toast.LENGTH\_SHORT).show();  
            } else if (msg.what == 2) {  
                System.out.println("连接成功");  
                Toast.makeText(MainActivity.this, "连接成功", Toast.LENGTH\_SHORT).show();  
                try {  
                    client.subscribe(myTopic, 1);  
                } catch (Exception e) {  
                    e.printStackTrace();  
                }  
            } else if (msg.what == 3) {  
                Toast.makeText(MainActivity.this, "连接失败，系统正在重连", Toast.LENGTH\_SHORT).show();  
                System.out.println("连接失败，系统正在重连");  
            }  
        }

    };

    startReconnect();  
}

private void startReconnect() {  
    scheduler = Executors.newSingleThreadScheduledExecutor();  
    scheduler.scheduleAtFixedRate(new Runnable() {

        @Override  
        public void run() {  
            if (!client.isConnected()) {  
                connect();  
            }  
        }  
    }, 0 \* 1000, 10 \* 1000, TimeUnit.MILLISECONDS);  
}

private void init() {  
    try {  
        //host为主机名，test为clientid即连接MQTT的客户端ID，一般以客户端唯一标识符表示，MemoryPersistence设置clientid的保存形式，默认为以内存保存  
        client = new MqttClient(host, "test",  
                new MemoryPersistence());  
        //MQTT的连接设置  
        options = new MqttConnectOptions();  
        //设置是否清空session,这里如果设置为false表示服务器会保留客户端的连接记录，这里设置为true表示每次连接到服务器都以新的身份连接  
        options.setCleanSession(true);  
        //设置连接的用户名  
        options.setUserName(userName);  
        //设置连接的密码  
        options.setPassword(passWord.toCharArray());  
        // 设置超时时间 单位为秒  
        options.setConnectionTimeout(10);  
        // 设置会话心跳时间 单位为秒 服务器会每隔1.5\*20秒的时间向客户端发送个消息判断客户端是否在线，但这个方法并没有重连的机制  
        options.setKeepAliveInterval(20);  
        //设置回调  
        client.setCallback(new MqttCallback() {  
            @Override  
            public void connectionLost(Throwable cause) {  
                //连接丢失后，一般在这里面进行重连  
                System.out.println("connectionLost----------");  
            }  
            @Override  
            public void deliveryComplete(IMqttDeliveryToken token) {  
                //publish后会执行到这里  
                System.out.println("deliveryComplete---------"  
                        + token.isComplete());  
            }  
            @Override  
            public void messageArrived(String topicName, MqttMessage message)  
                    throws Exception {  
                //subscribe后得到的消息会执行到这里面  
                System.out.println("messageArrived----------");  
                Message msg = new Message();  
                msg.what = 1;  
                msg.obj = topicName + "---" + message.toString();  
                handler.sendMessage(msg);  
            }  
        });  
    } catch (Exception e) {  
        e.printStackTrace();  
    }  
}  
private void connect() {  
    new Thread(new Runnable() {

        @Override  
        public void run() {  
            try {  
                client.connect(options);  
                Message msg = new Message();  
                msg.what = 2;  
                handler.sendMessage(msg);  
            } catch (Exception e) {  
                e.printStackTrace();  
                Message msg = new Message();  
                msg.what = 3;  
                handler.sendMessage(msg);  
            }  
        }  
    }).start();  
}  
@Override  
public boolean onKeyDown(int keyCode, KeyEvent event) {  
    if (client != null && keyCode == KeyEvent.KEYCODE\_BACK) {  
        try {  
            client.disconnect();  
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
    }  
    return super.onKeyDown(keyCode, event);  
}

@Override  
protected void onDestroy() {  
    super.onDestroy();  
    try {  
        scheduler.shutdown();  
        client.disconnect();  
    } catch (MqttException e) {  
        e.printStackTrace();  
    }  
}  
@Override  
public void onBackPressed() {  
    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer\_layout);  
    if (drawer.isDrawerOpen(GravityCompat.START)) {  
        drawer.closeDrawer(GravityCompat.START);  
    } else {  
        super.onBackPressed();  
    }  
}

@Override  
public boolean onCreateOptionsMenu(Menu menu) {  
    // Inflate the menu; this adds items to the action bar if it is present.  
    getMenuInflater().inflate(R.menu.main, menu);  
    return true;  
}

@Override  
public boolean onOptionsItemSelected(MenuItem item) {  
    // Handle action bar item clicks here. The action bar will  
    // automatically handle clicks on the Home/Up button, so long  
    // as you specify a parent activity in AndroidManifest.xml.  
    int id = item.getItemId();

    //noinspection SimplifiableIfStatement  
    if (id == R.id.action\_settings) {  
        return true;  
    }

    return super.onOptionsItemSelected(item);  
}

@SuppressWarnings("StatementWithEmptyBody")  
@Override  
public boolean onNavigationItemSelected(MenuItem item) {  
    // Handle navigation view item clicks here.  
    int id = item.getItemId();

    if (id == R.id.nav\_camera) {  
        connect();  
    } else if (id == R.id.nav\_gallery) {

    } else if (id == R.id.nav\_slideshow) {

    } else if (id == R.id.nav\_manage) {

    } else if (id == R.id.nav\_share) {

    } else if (id == R.id.nav\_send) {

    }

    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer\_layout);  
    drawer.closeDrawer(GravityCompat.START);  
    return true;  
}  

}