I've been struggling with this for hours. I've also checked the documentation and several topics. I found this code in two topics, both guys said the code was working perfectly, but not on my computer. The first Toast appears, but the second one never. What is wrong?
public class HelloAndroid2 extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Intent intent = new Intent(this, AlarmReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0,
intent, PendingIntent.FLAG_ONE_SHOT);
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
alarmManager.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + (10 * 1000), pendingIntent);
Toast.makeText(this, "Alarm set", Toast.LENGTH_LONG).show();
}
public final class AlarmReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
Toast.makeText(context, "Alarm worked.", Toast.LENGTH_LONG).show();
}
}
}
Actually you dont need to specify the action since you use the class AlarmReceiver.class
in the intent.
In your AndroidManifest.xml
, make sure you have a receiver definition within the <application>
tags, something like:
<receiver android:name="AlarmReceiver">
Edit: Ok there are 2 ways to use your broadcast receiver.
1) From the code you have provided, AlarmReceiver.java
that will contains:
public final class AlarmReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
Toast.makeText(context, "Alarm worked.", Toast.LENGTH_LONG).show();
}
}
and HelloAndroid2.java
:
public class HelloAndroid2 extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Intent intent = new Intent(this, AlarmReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0,
intent, PendingIntent.FLAG_ONE_SHOT);
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
alarmManager.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + (10 * 1000), pendingIntent);
Toast.makeText(this, "Alarm set", Toast.LENGTH_LONG).show();
}
}
Like this, you can set your broadcast receiver to work with the AndroidManifest.xml
and the tag <receiver ...>
2)2nd way. With this way, you can use just 1 file HelloWorld2.java
:
In your activity, create your broadcast receiver and register it.
public class HelloWorld2 extends Activity {
private SharedPreferences prefs;
private String mName;
BroadcastReceiver alarmReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
Toast.makeText(context, "Alarm worked", Toast.LENGTH_LONG).show();
}
};
public static final String ACTION_NAME = "com.helloworld.MYACTION";
private IntentFilter myFilter = new IntentFilter(ACTION_NAME);
@Override
protected void onPause() {
unregisterReceiver(alarmReceiver);
super.onPause();
}
@Override
protected void onResume() {
registerReceiver(alarmReceiver, myFilter);
super.onResume();
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
registerReceiver(alarmReceiver, myFilter);
Intent intent = new Intent(ACTION_NAME);
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0,
intent, PendingIntent.FLAG_ONE_SHOT);
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
alarmManager.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + (10 * 1000), pendingIntent);
Toast.makeText(this, "Alarm set", Toast.LENGTH_LONG).show();
}