java: 定时器+线程+自动唤醒APP函数+结束进程 +UDP收发 工具函数使用使用

定时器

//定时器
Timer timer = null;
TimerTask task;
//设置定时器
if (timer == null) {
            timer = new Timer();
        }

        /**
         * 登录后就开启定时器
         */
        if (task == null) {
            task = new TimerTask() {
                @Override
                public void run() {
                //业务逻辑
                    System.out.println("run TimerTask");
                    }
                   
            };
        }
        if(timer != null && task != null )
            timer.schedule(task,0,1000);

//关闭定时器
if (timer != null) {
            timer.cancel();
            timer = null;
        }
        if (task != null) {
            task.cancel();
            task = null;
        }

线程

//线程
private Thread thread;
thread=new Thread(new Runnable() {
            @Override
            public void run() {
               //业务逻辑
            }
        });
        thread.start();

自动唤醒APP函数

/**
         * 跳转第三方APP唤醒
         */
        PackageManager packageManager = getPackageManager();
        if (PackageUtil.checkPackInfo(this,ConstantUtil.PACKAGE_NAME)) {
            Intent intent = null;
            if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.CUPCAKE) {
                intent = packageManager.getLaunchIntentForPackage(ConstantUtil.PACKAGE_NAME);
                System.out.println("MainActivity  OnCreate() not start aodingPlayer");
                startActivity(intent);
            }
        } else {
            Toast.makeText(MainActivity.this, "没有安装" + ConstantUtil.PACKAGE_NAME, Toast.LENGTH_LONG).show();
        }

//涉及到的类
public class PackageUtil {
    public static Boolean checkPackInfo(Context paramContext, String paramString ) {
        PackageInfo info = null;
        try {
            info = paramContext.getPackageManager().getPackageInfo(paramString, 0);
        } catch (PackageManager.NameNotFoundException e) {
            e.printStackTrace();
        }

        if (info != null) {
            return true;
        }
        return false;
    }
}

public class ConstantUtil {
    /**
     * 拉起软件的包名
     */
    public static final String PACKAGE_NAME = "com.qht.a";
}

结束进程

//结束进程方法调用
SuUtil.kill(ConstantUtil.PACKAGE_NAME);

/**
 *
 * 执行android命令
 */
public class SuUtil {

    private static Process process;

    /**
     * 结束进程,执行 *** 作调用即可
     */
    public static void kill(String packageName) {
        initProcess();
        killProcess(packageName);
        close();
    }

    /**
     * 初始化进程
     */
    private static void initProcess() {
        if (process == null)
            try {
                process = Runtime.getRuntime().exec("su");
            } catch (IOException e) {
                e.printStackTrace();
            }
    }

    /**
     * 结束进程
     */
    private static void killProcess(String packageName) {
        OutputStream out = process.getOutputStream();
        String cmd = "am force-stop " + packageName + " \n";
        try {
            out.write(cmd.getBytes());
            out.flush();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    /**
     * 关闭输出流
     */
    private static void close() {
        if (process != null)
            try {
                process.getOutputStream().close();
                process = null;
            } catch (IOException e) {
                e.printStackTrace();
            }
    }
}

UDP收发

private DatagramSocket socket = null;
private int receivePort=1667;//本身端口
private int sendPort =0;//唤醒对方的端口
InetAddress serverSendAddress = null;//唤醒对方的ip

//udp接收
try {
                    System.out.println("监听端口1667");
                    socket = new DatagramSocket(receivePort);
                    socket.setSoTimeout(5000);
                } catch (Exception e) {
                    e.printStackTrace();
                }
while (true) {
                    byte data[] = new byte[1024];
                    // 创建一个接收数据的DatagramPacket对象
                    DatagramPacket packet = new DatagramPacket(data, data.length);
                    try {
                        // 接收数据报
                        socket.receive(packet);
                        serverSendAddress=packet.getAddress();
                        sendPort=packet.getPort();
                        System.out.println("serverSendAddress："+serverSendAddress.toString()+"port："+sendPort);
                    } catch (SocketTimeoutException e) {
                        System.out.println("socket 10s 超时:" + e.getMessage());
                    } catch (SocketException e) {
                        System.out.println("socket SocketException:" + e.getMessage());
                        e.printStackTrace();
                    } catch (IOException e) {
                        System.out.println("socket IOException:" + e.getMessage());
                        e.printStackTrace();
                    }
                    String result = new String(packet.getData(), packet.getOffset(), packet.getLength()); //接受到的结果
                    } 

//udp发送
String sendData ="restartSuccess";
                        byte data1[] = sendData.getBytes();
                        // 创建一个发送数据的DatagramPacket对象
                        DatagramPacket packetSend = new DatagramPacket(data1, data1.length, serverSendAddress, sendPort);
                        try {
                            socket.send(packetSend);
                            System.out.println("socket.send:" + sendData);
                        } catch (IOException e) {
                            e.printStackTrace();
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }