安卓 service

public class MyService extendsService {
    publicMyService() {
    }

    @Override
    publicIBinder onBind(Intent intent) {
        //TODO: Return the communication channel to the service.
        //throw new UnsupportedOperationException("Not yet implemented");
        return new Binder();  //这里必须要返回一个Binder实例
}
    
    //服务启动
@Override
    public void onStart(Intent intent, intstartId) {
        super.onStart(intent, startId);
    }

    //服务销毁
@Override
    public voidonDestroy() {
        super.onDestroy();
    }

    //服务开始的时候 执行的方法
@Override
    public int onStartCommand(Intent intent, int flags, intstartId) {
        System.out.print("服务正在执行.....");
        newThread() {
            @Override
            public voidrun() {
                super.run();

                while (true) {
                    System.out.print("服务正在执行....");
                    try{
                        sleep(2000);
                    } catch(InterruptedException e) {
                        e.printStackTrace();
                    }
                }
            }
        }.start();
        return super.onStartCommand(intent, flags, startId);
    }
}

public class MainActivity extends AppCompatActivity implementsServiceConnection {

    privateTextView tv;

    @Override
    protected voidonCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //setContentView(R.layout.activity_main);  //创建视图
        //setContentView(R.layout.my_layout);

        this.setContentView(R.layout.my_layout);

        //启动服务
        findViewById(R.id.btnStartServcie).setOnClickListener(newView.OnClickListener() {
            @Override
            public voidonClick(View v) {

                System.out.print("服务开始执行......");
                Intent i = new Intent(MainActivity.this, MyService.class);
                startService(i);
            }
        });
        //停止服务
        this.findViewById(R.id.btnStopServcie).setOnClickListener(newView.OnClickListener() {
            @Override
            public voidonClick(View v) {
                Intent i = new Intent(MainActivity.this, MyService.class);
                stopService(i);
            }
        });


        //btnBindServcie 绑定service
        this.findViewById(R.id.btnBindServcie).setOnClickListener(newView.OnClickListener() {
            @Override
            public voidonClick(View v) {
                Intent i = new Intent(MainActivity.this, MyService.class);
                //这里的MainActivity必须要实现ServiceConnection 重写onServiceConnected 和 onServiceDisconnected 方法
                bindService(i, MainActivity.this, Context.BIND_AUTO_CREATE);
            }
        });

        //btnBindServcie 解除绑定service
        this.findViewById(R.id.btnUnBindServcie).setOnClickListener(newView.OnClickListener() {
            @Override
            public voidonClick(View v) {
                Intent i = new Intent(MainActivity.this, MyService.class);
                unbindService(MainActivity.this);
            }
        });

        System.out.println("onCreate");
    }
    @Override
    protected voidonStart() {
        super.onStart();
        System.out.println("onStart");
    }

    @Override
    protected voidonResume() {
        super.onResume();
        System.out.println("onResume");
    }

    @Override
    protected voidonPause() {
        super.onPause();
        System.out.println("onPause");
    }

    @Override
    protected voidonStop() {
        super.onStop();
        System.out.println("onStop");
    }

    @Override
    protected voidonDestroy() {
        super.onDestroy();
        System.out.println("onDestroy");
    }

    @Override
    protected voidonRestart() {
        super.onRestart();
        System.out.println("onRestart");
    }


    //服务被绑定成功后被执行
@Override
    public voidonServiceConnected(ComponentName name, IBinder service) {
        System.out.print("service connected");
    }


    //服务被杀掉后执行
@Override
    public voidonServiceDisconnected(ComponentName name) {
        System.out.print("service DisConnected");
    }
}