public class UpgradeService extends Service {
 private Thread thread;
 private Intent intent;
 private int progress;
 private Boolean isStop;
 public class MyBinder extends Binder{
  public void callPauseUpgrade(){
   pauseUpgrade();
  }

  public void callStopUpgrade() {
   stopUpgrade();
  }
 }

 private void stopUpgrade() {
  progress = 0;
  isStop = false;
  intent.putExtra("progress",progress);
  sendBroadcast(intent);
 }

 @Override
 public void onCreate() {
  super.onCreate();
  progress = 0;
  isStop = true;
  intent = new Intent();
  thread = new Thread(new Runnable() {
   @Override
   public void run() {
    while(isStop){
     try {
      Thread.sleep(1000);
     } catch (InterruptedException e) {
      e.printStackTrace();
     }
     progress = progress +5;
     intent.putExtra("progress",progress);
     intent.setAction("UPGRADE_ACTION");
     sendBroadcast(intent);
     if(progress>=100) break;
    }

   }
  });
  thread.start();
 }

 private void pauseUpgrade() {
  //TODO:Pause the upgrade
  Toast.makeText(getApplicationContext(),"暂停",Toast.LENGTH_SHORT).show();
  isStop = false;
 }

 @Override
 public IBinder onBind(Intent intent) {
  return new MyBinder();
 }
}

public class MainActivity extends AppCompatActivity implements View.OnClickListener{
 private Button mBtStart;
 private Button mBtStop;
 private Button mBtPause;
 private ProgressBar mPbProgress;
 private UpgradeService.MyBinder myBinder;
 private boolean isBound;
 private UpgradeReceiver upgradeReceiver;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  IntentFilter intentFilter = new IntentFilter();
  intentFilter.addAction("UPGRADE_ACTION");
  upgradeReceiver = new UpgradeReceiver();
  registerReceiver(upgradeReceiver,intentFilter);
  initView();
  initEvent();

 }
 public class UpgradeReceiver extends BroadcastReceiver{

  @Override
  public void onReceive(Context context, Intent intent) {
   mPbProgress.setProgress(intent.getIntExtra("progress",0));
  }
 }
 @Override
 protected void onDestroy() {
  super.onDestroy();
  unregisterReceiver(upgradeReceiver);
 }

 private void initEvent() {
  mBtPause.setOnClickListener(this);
  mBtStart.setOnClickListener(this);
  mBtStop.setOnClickListener(this);
 }

 private void initView() {
  mBtPause = (Button) findViewById(R.id.bt_pause);
  mBtStart = (Button) findViewById(R.id.bt_start);
  mBtStop = (Button) findViewById(R.id.bt_stop);
  mPbProgress = (ProgressBar) findViewById(R.id.pb_progress);
 }

 @Override
 public void onClick(View v) {
  switch(v.getId()){
   case R.id.bt_pause:
    if(isBound&&myBinder!=null){
     myBinder.callPauseUpgrade();
    }
    break;
   case R.id.bt_start:
    bindService(new Intent(MainActivity.this,UpgradeService.class),conn,BIND_AUTO_CREATE);
    break;
   case R.id.bt_stop:
    if(isBound) {
     myBinder.callStopUpgrade();
     unbindService(conn);
     isBound = false;
    }
    break;
  }
 }

 private ServiceConnection conn = new ServiceConnection() {
  @Override
  public void onServiceConnected(ComponentName name, IBinder service) {
   if(service != null){
    myBinder = (UpgradeService.MyBinder) service;
    isBound = true;
   }
  }

  @Override
  public void onServiceDisconnected(ComponentName name) {
   isBound = false;
  }
 };
}