The document discusses how to use AlarmManager in Android to schedule intents and broadcast receivers to be triggered at specific times in the future. It provides code examples of how to set an alarm to trigger an intent in 10 seconds, how to register a broadcast receiver in the manifest to receive alarm intents, and how to use setRepeating() to have an alarm trigger every 30 seconds. It also demonstrates how to cancel an alarm using its pending intent. The key points are that AlarmManager allows scheduling intents and broadcast receivers to be launched even if the app is closed, and is intended for triggering actions at specific times rather than just pausing a thread for a period.

1. PROGRAMAÇÃO PARA
DISPOSITIVOS MÓVEIS
AlarmManager

2. Objetivos da aula
 AlarmManager

3. Qual a maneira mais correta para
disparar uma intent as 15:00:30 de
cada dia?

4. Android nos facilita com
AlarmManager...

7. Podemos predizer o futuro...

8. Podemos disparar uma Intent na data
e hora desejada.

9. Depois que ativamos o alarme,
podemos até esquecê-lo.

10. O alarme só será cancelado por nós
ou caso o device seja reiniciado.

12. public class ExemploAlarme extends Activity {
public void onCreate(Bundle savedInstanceState) {
...
agendarPara10Segundos();
}
}

13. public class ExemploAlarme extends Activity {
public void onCreate(Bundle savedInstanceState) {
...
agendarPara10Segundos();
}
private void agendarPara10Segundos() {
}
}

14. public class ExemploAlarme extends Activity {
public void onCreate(Bundle savedInstanceState) {
...
agendarPara10Segundos();
}
private void agendarPara10Segundos() {
Intent intencao = new Intent("ALARME_TESTE");
}
}

15. public class ExemploAlarme extends Activity {
public void onCreate(Bundle savedInstanceState) {
...
agendarPara10Segundos();
}
private void agendarPara10Segundos() {
Intent intencao = new Intent("ALARME_TESTE");
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intencao, 0);
}
}

16. public class ExemploAlarme extends Activity {
public void onCreate(Bundle savedInstanceState) {
...
agendarPara10Segundos();
}
private void agendarPara10Segundos() {
Intent intencao = new Intent("ALARME_TESTE");
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intencao, 0);
Calendar calendario = Calendar.getInstance();
calendario.setTimeInMillis(System.currentTimeMillis());
}
}

17. public class ExemploAlarme extends Activity {
public void onCreate(Bundle savedInstanceState) {
...
agendarPara10Segundos();
}
private void agendarPara10Segundos() {
Intent intencao = new Intent("ALARME_TESTE");
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intencao, 0);
Calendar calendario = Calendar.getInstance();
calendario.setTimeInMillis(System.currentTimeMillis());
calendario.add(Calendar.SECOND, 10);
long agendamentoEmMilis = calendario.getTimeInMillis();
}
}

18. public class ExemploAlarme extends Activity {
public void onCreate(Bundle savedInstanceState) {
...
agendarPara10Segundos();
}
private void agendarPara10Segundos() {
Intent intencao = new Intent("ALARME_TESTE");
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intencao, 0);
Calendar calendario = Calendar.getInstance();
calendario.setTimeInMillis(System.currentTimeMillis());
calendario.add(Calendar.SECOND, 10);
long agendamentoEmMilis = calendario.getTimeInMillis();
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
}
}

19. public class ExemploAlarme extends Activity {
public void onCreate(Bundle savedInstanceState) {
...
agendarPara10Segundos();
}
private void agendarPara10Segundos() {
Intent intencao = new Intent("ALARME_TESTE");
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intencao, 0);
Calendar calendario = Calendar.getInstance();
calendario.setTimeInMillis(System.currentTimeMillis());
calendario.add(Calendar.SECOND, 10);
long agendamentoEmMilis = calendario.getTimeInMillis();
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
alarmManager.set(AlarmManager.RTC_WAKEUP, agendamentoEmMilis, pendingIntent);
}
}

20. O AlarmManager irá disparar a Intent
“ALARME_TESTE” após 10 segundos.
Neste período nosso aplicativo pode
ter sido finalizado. Justamente por
isso, precisaremos de um
BroadcastReceiver...

21. public class ReceberAlarme extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
Toast.makeText(context, "Alarme recebido!", Toast.LENGTH_LONG).show();
}
}

22. public class ReceberAlarme extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
Toast.makeText(context, "Alarme recebido!", Toast.LENGTH_LONG).show();
}
}

23. public class ReceberAlarme extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
Toast.makeText(context, "Alarme recebido!", Toast.LENGTH_LONG).show();
}
}

24. Registramos o BroadcastReceiver
aonde?

25. <?xml version="1.0" encoding="UTF-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="br.senai.alarmmanager“ android:versionCode="1“>
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="19" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity android:name=".ExemploAlarme">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver android:name=".ReceberAlarme">
<intent-filter>
<action android:name="ALARME_TESTE" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</receiver>
</application>
</manifest>

26. <?xml version="1.0" encoding="UTF-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="br.senai.alarmmanager“ android:versionCode="1“>
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="19" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity android:name=".ExemploAlarme">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver android:name=".ReceberAlarme">
<intent-filter>
<action android:name="ALARME_TESTE" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</receiver>
</application>
</manifest>

27. <?xml version="1.0" encoding="UTF-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="br.senai.alarmmanager“ android:versionCode="1“>
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="19" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity android:name=".ExemploAlarme">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver android:name=".ReceberAlarme">
<intent-filter>
<action android:name="ALARME_TESTE" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</receiver>
</application>
</manifest>

28. <?xml version="1.0" encoding="UTF-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="br.senai.alarmmanager“ android:versionCode="1“>
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="19" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity android:name=".ExemploAlarme">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver android:name=".ReceberAlarme">
<intent-filter>
<action android:name="ALARME_TESTE" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</receiver>
</application>
</manifest>

29. Como cancelar um alarme?

30. public class ExemploAlarme extends Activity {
public void onCreate(Bundle savedInstanceState) {
...
agendarPara10Segundos();
}
private void agendarPara10Segundos() {
Intent intencao = new Intent("ALARME_TESTE");
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intencao, 0);
Calendar calendario = Calendar.getInstance();
calendario.setTimeInMillis(System.currentTimeMillis());
calendario.add(Calendar.SECOND, 10);
long agendamentoEmMilis = calendario.getTimeInMillis();
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
alarmManager.set(AlarmManager.RTC_WAKEUP, agendamentoEmMilis, pendingIntent);
}
protected void onDestroy() {
super.onDestroy();
}
}

31. public class ExemploAlarme extends Activity {
public void onCreate(Bundle savedInstanceState) {
...
agendarPara10Segundos();
}
private void agendarPara10Segundos() {
Intent intencao = new Intent("ALARME_TESTE");
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intencao, 0);
Calendar calendario = Calendar.getInstance();
calendario.setTimeInMillis(System.currentTimeMillis());
calendario.add(Calendar.SECOND, 10);
long agendamentoEmMilis = calendario.getTimeInMillis();
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
alarmManager.set(AlarmManager.RTC_WAKEUP, agendamentoEmMilis, pendingIntent);
}
protected void onDestroy() {
super.onDestroy();
Intent it = new Intent("ALARME_TESTE");
}
}

32. public class ExemploAlarme extends Activity {
public void onCreate(Bundle savedInstanceState) {
...
agendarPara10Segundos();
}
private void agendarPara10Segundos() {
Intent intencao = new Intent("ALARME_TESTE");
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intencao, 0);
Calendar calendario = Calendar.getInstance();
calendario.setTimeInMillis(System.currentTimeMillis());
calendario.add(Calendar.SECOND, 10);
long agendamentoEmMilis = calendario.getTimeInMillis();
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
alarmManager.set(AlarmManager.RTC_WAKEUP, agendamentoEmMilis, pendingIntent);
}
protected void onDestroy() {
super.onDestroy();
Intent it = new Intent("ALARME_TESTE");
PendingIntent pi = PendingIntent.getBroadcast(this, 0, it, 0);
}
}

33. public class ExemploAlarme extends Activity {
public void onCreate(Bundle savedInstanceState) {
...
agendarPara10Segundos();
}
private void agendarPara10Segundos() {
Intent intencao = new Intent("ALARME_TESTE");
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intencao, 0);
Calendar calendario = Calendar.getInstance();
calendario.setTimeInMillis(System.currentTimeMillis());
calendario.add(Calendar.SECOND, 10);
long agendamentoEmMilis = calendario.getTimeInMillis();
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
alarmManager.set(AlarmManager.RTC_WAKEUP, agendamentoEmMilis, pendingIntent);
}
protected void onDestroy() {
super.onDestroy();
Intent it = new Intent("ALARME_TESTE");
PendingIntent pi = PendingIntent.getBroadcast(this, 0, it, 0);
AlarmManager manager = (AlarmManager) getSystemService(ALARM_SERVICE);
}
}

34. public class ExemploAlarme extends Activity {
public void onCreate(Bundle savedInstanceState) {
...
agendarPara10Segundos();
}
private void agendarPara10Segundos() {
Intent intencao = new Intent("ALARME_TESTE");
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intencao, 0);
Calendar calendario = Calendar.getInstance();
calendario.setTimeInMillis(System.currentTimeMillis());
calendario.add(Calendar.SECOND, 10);
long agendamentoEmMilis = calendario.getTimeInMillis();
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
alarmManager.set(AlarmManager.RTC_WAKEUP, agendamentoEmMilis, pendingIntent);
}
protected void onDestroy() {
super.onDestroy();
Intent it = new Intent("ALARME_TESTE");
PendingIntent pi = PendingIntent.getBroadcast(this, 0, it, 0);
AlarmManager manager = (AlarmManager) getSystemService(ALARM_SERVICE);
manager.cancel(pi);
}
}

35. E para repetir o alarme a cada 30
segundos?

36. private void agendarPara10Segundos() {
Intent intencao = new Intent("ALARME_TESTE");
PendingIntent pi = PendingIntent.getBroadcast(this, 0, intencao, 0);
Calendar calendario = Calendar.getInstance();
calendario.setTimeInMillis(System.currentTimeMillis());
calendario.add(Calendar.SECOND, 10);
long emMilis = calendario.getTimeInMillis();
int trintaSegundos = 30 * 1000;
AlarmManager alarmmanager = (AlarmManager) getSystemService(ALARM_SERVICE);
alarmmanager.set(AlarmManager.RTC_WAKEUP, emMilis, pi);
}

37. private void agendarPara10Segundos() {
Intent intencao = new Intent("ALARME_TESTE");
PendingIntent pi = PendingIntent.getBroadcast(this, 0, intencao, 0);
Calendar calendario = Calendar.getInstance();
calendario.setTimeInMillis(System.currentTimeMillis());
calendario.add(Calendar.SECOND, 10);
long emMilis = calendario.getTimeInMillis();
int trintaSegundos = 30 * 1000;
AlarmManager alarmmanager = (AlarmManager) getSystemService(ALARM_SERVICE);
alarmmanager.setRepeating(AlarmManager.RTC_WAKEUP, emMilis, pi);
}

38. private void agendarPara10Segundos() {
Intent intencao = new Intent("ALARME_TESTE");
PendingIntent pi = PendingIntent.getBroadcast(this, 0, intencao, 0);
Calendar calendario = Calendar.getInstance();
calendario.setTimeInMillis(System.currentTimeMillis());
calendario.add(Calendar.SECOND, 10);
long emMilis = calendario.getTimeInMillis();
int trintaSegundos = 30 * 1000;
AlarmManager alarmmanager = (AlarmManager) getSystemService(ALARM_SERVICE);
alarmmanager.setRepeating(AlarmManager.RTC_WAKEUP, emMilis, trintaSegundos, pi);
}

39. Não utilize AlarmManager para
simplesmente fazer uma Thread
dormir por um determinado
momento. Para isso, utilize Handler.

41. Até a próxima!