15/9/8/BroadcastReceiver實現定時功能/Service

BroadcastReceiver

Service

BroadcastReceiver

1.創建一個Java類繼承與BroadcastReceiver，重寫裏面的方法，什麼都不用做，添加一句Toast就可以

 Toast.makeText(context, "接收到了廣播", Toast.LENGTH_SHORT).show();

2.在Manifest中聲明這個receiver，可以在這裏面註冊也可以在代碼中註冊
3.在代碼中註冊並開啓廣播

 mReceiver=new MyReceiver();
        IntentFilter filter=new IntentFilter();
        filter.addAction("com.my.broadcast");
        registerReceiver(mReceiver,filter);
Intent intent=new Intent();
                intent.setAction("com.my.broadcast");
                sendBroadcast(intent);
 @Override
    protected void onDestroy() {
        super.onDestroy();
        unregisterReceiver(mReceiver);
    }

BroadcastReceiver實現定時功能

 private AlarmManager mAlarmManager;
mAlarmManager= (AlarmManager) getSystemService(ALARM_SERVICE);
                Intent intent1=new Intent();
                intent1.setAction("com.my.broadcast");
                PendingIntent pendingIntent=PendingIntent.getBroadcast(getApplicationContext(),0,intent1,PendingIntent.FLAG_UPDATE_CURRENT);
                mAlarmManager.setRepeating(AlarmManager.RTC_WAKEUP,System.currentTimeMillis()+1000,3000,pendingIntent);


                Intent intent2=new Intent();
                intent2.setAction("com.my.broadcast");
                PendingIntent pendingIntent1=PendingIntent.getBroadcast(getApplicationContext(),0,intent2,PendingIntent.FLAG_UPDATE_CURRENT);
                mAlarmManager.cancel(pendingIntent1);

Service開啓和關閉

1.在Manifest中獲取權限
2.創建一個Java類繼承與Service，複寫裏面的方法
3.在Manifest中聲明該服務
4.開啓和關閉服務

  Intent intent3=new Intent(getApplicationContext(),MyService.class);
                startService(intent3);
Intent intent4=new Intent(getApplicationContext(),MyService.class);
                stopService(intent4);

所有程序

public class MainActivity extends AppCompatActivity implements View.OnClickListener{
    private Button mBtnSend;
    private MyReceiver mReceiver;
    private AlarmManager mAlarmManager;
    private Button mBtnAlarm;
    private Button mBtnCancle;
    private Button mBtnStart;
    private Button mBtnStop;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mReceiver=new MyReceiver();
        IntentFilter filter=new IntentFilter();
        filter.addAction("com.my.broadcast");
        registerReceiver(mReceiver,filter);
        mAlarmManager= (AlarmManager) getSystemService(ALARM_SERVICE);
        mBtnSend= (Button) findViewById(R.id.button_send);
        mBtnAlarm= (Button) findViewById(R.id.button_alarm);
        mBtnCancle= (Button) findViewById(R.id.button_cancle);
        mBtnStart= (Button) findViewById(R.id.button_service_start);
        mBtnStop= (Button) findViewById(R.id.button_service_stop);
        mBtnSend.setOnClickListener(this);
        mBtnAlarm.setOnClickListener(this);
        mBtnCancle.setOnClickListener(this);
        mBtnStart.setOnClickListener(this);
        mBtnStop.setOnClickListener(this);
    }
    @Override
    public void onClick(View v) {
        switch (v.getId()){
            case R.id.button_send:
                Intent intent=new Intent();
                intent.setAction("com.my.broadcast");
                sendBroadcast(intent);
                break;
            case R.id.button_alarm:
                Intent intent1=new Intent();
                intent1.setAction("com.my.broadcast");
                PendingIntent pendingIntent=PendingIntent.getBroadcast(getApplicationContext(),0,intent1,PendingIntent.FLAG_UPDATE_CURRENT);
                mAlarmManager.setRepeating(AlarmManager.RTC_WAKEUP,System.currentTimeMillis()+1000,3000,pendingIntent);
                break;
            case R.id.button_cancle:
                Intent intent2=new Intent();
                intent2.setAction("com.my.broadcast");
                PendingIntent pendingIntent1=PendingIntent.getBroadcast(getApplicationContext(),0,intent2,PendingIntent.FLAG_UPDATE_CURRENT);
                mAlarmManager.cancel(pendingIntent1);
                break;
            case R.id.button_service_start:
                Intent intent3=new Intent(getApplicationContext(),MyService.class);
                startService(intent3);
                break;
            case R.id.button_service_stop:
                Intent intent4=new Intent(getApplicationContext(),MyService.class);
                stopService(intent4);
                break;
            default:
                break;
        }
    }
    @Override
    protected void onDestroy() {
        super.onDestroy();
        unregisterReceiver(mReceiver);
    }
}
public class MyReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        Toast.makeText(context, "接收到了廣播", Toast.LENGTH_SHORT).show();
    }
}
public class MyService extends Service {
    @Override
    public void onCreate() {
        super.onCreate();
        Log.d("1","onCreate");
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        Log.d("1","onStartCommand");
        return super.onStartCommand(intent, flags, startId);

    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        Log.d("1","onDestroy");
    }

    @Nullable
    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }
}