Develop Reference

Show notification at a specific time using AlarmManager and BroadcastReceiver in android is not working

I create an android application to view notification at a particular time when the application is not running background . I use AlarmMabager & BroadcastReceiver for above purpose .
This application can pass a notification at a specific time whether user is not starting the application .
Here are the steps which I use to do ,
MainActivity.java
public class MainActivity extends Activity
{
private PendingIntent pendingIntent;
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.MONTH, 7);
calendar.set(Calendar.YEAR, 2016);
calendar.set(Calendar.DAY_OF_MONTH, 7);
calendar.set(Calendar.HOUR_OF_DAY, 13);
calendar.set(Calendar.MINUTE, 40);
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.AM_PM,Calendar.PM);
Intent myIntent = new Intent(MainActivity.this, MyReceiver.class);
pendingIntent = PendingIntent.getBroadcast(MainActivity.this, 0, myIntent,0);
AlarmManager alarmManager = (AlarmManager)getSystemService(ALARM_SERVICE);
alarmManager.set(AlarmManager.RTC, calendar.getTimeInMillis(), pendingIntent);
} //end onCreate
}
MyReceiver.java
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
public class MyReceiver extends BroadcastReceiver
{
#Override
public void onReceive(Context context, Intent intent)
{
Intent service1 = new Intent(context, MyAlarmService.class);
context.startService(service1);
}
}
MyAlarmService.java
public class MyAlarmService extends Service
{
private NotificationManager mManager;
#Override
public IBinder onBind(Intent arg0)
{
// TODO Auto-generated method stub
return null;
}
#Override
public void onCreate()
{
// TODO Auto-generated method stub
super.onCreate();
}
#SuppressWarnings("static-access")
#Override
public void onStart(Intent intent, int startId)
{
super.onStart(intent, startId);
mManager = (NotificationManager) this.getApplicationContext().getSystemService(this.getApplicationContext().NOTIFICATION_SERVICE);
Intent intent1 = new Intent(this.getApplicationContext(),MainActivity.class);
Notification notification = new Notification(R.mipmap.ic_launcher,"This is a test message!", System.currentTimeMillis());
intent1.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP| Intent.FLAG_ACTIVITY_CLEAR_TOP);
PendingIntent pendingNotificationIntent = PendingIntent.getActivity( this.getApplicationContext(),0, intent1,PendingIntent.FLAG_UPDATE_CURRENT);
notification.flags |= Notification.FLAG_AUTO_CANCEL;
notification.setLatestEventInfo(this.getApplicationContext(), "AlarmManagerDemo", "This is a test message!", pendingNotificationIntent);
mManager.notify(0, notification);
}
#Override
public void onDestroy()
{
// TODO Auto-generated method stub
super.onDestroy();
}
}
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="10" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="com.example.MainActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<service android:name=".MyAlarmService"
android:enabled="true" />
<receiver android:name=".MyReceiver"/>
</application>
</manifest>
After completing all the steps I run the application in my device but it doesn't show any notification . Is there anything wrong ? What should I do to correct this .
Thank you .

firebase push notification doesnt shows in all devices

I'm trying to send a push notification to all devices from firebase but at first i tried only in my phone, it doesn't work, after that i tried in another phone and it doesn't work either. Finally with the 3rd one it work and it work at the second one magically. What i have to do to the push notifications work in all devices?
Manifest ->
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.startingandroid.firebasecloudmessaging">
<uses-permission android:name="android.permission.INTERNET"/>
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity android:name=".SplashActivity" android:label="">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".MainActivity" android:label="FCM"></activity>
<service
android:name=".MyFirebaseMessagingService">
<intent-filter>
<action android:name="com.google.firebase.MESSAGING_EVENT"/>
</intent-filter>
</service>
<service
android:name=".MyFirebaseInstanceIDService">
<intent-filter>
<action android:name="com.google.firebase.INSTANCE_ID_EVENT"/>
</intent-filter>
</service>
</application></manifest>
MyFirebaseInstanceIDService ->
public class MyFirebaseInstanceIDService extends FirebaseInstanceIdService {
private static final String TAG = "MyFirebaseIIDService";
#Override
public void onTokenRefresh() {
//Getting registration token
String refreshedToken = FirebaseInstanceId.getInstance().getToken();
//Displaying token in logcat
Log.e(TAG, "Refreshed token: " + refreshedToken);
}
private void sendRegistrationToServer(String token) {
//You can implement this method to store the token on your server
//Not required for current project
} }
MyFirebaseMessagingService ->
public class MyFirebaseMessagingService extends FirebaseMessagingService {
private static final String TAG = "StartingAndroid";
#Override
public void onMessageReceived(RemoteMessage remoteMessage) {
//It is optional
Log.e(TAG, "From: " + remoteMessage.getFrom());
Log.e(TAG, "Notification Message Body: " + remoteMessage.getNotification().getBody());
//Calling method to generate notification
sendNotification(remoteMessage.getNotification().getTitle(),remoteMessage.getNotification().getBody());
}
//This method is only generating push notification
private void sendNotification(String title, String messageBody) {
Intent intent = new Intent(this, MainActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent,
PendingIntent.FLAG_ONE_SHOT);
Uri defaultSoundUri= RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
.setSmallIcon(R.mipmap.ic_launcher)
.setContentTitle(title)
.setContentText(messageBody)
.setAutoCancel(true)
.setSound(defaultSoundUri)
.setContentIntent(pendingIntent);
NotificationManager notificationManager =
(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(0, notificationBuilder.build());
}}
SplashActivity
public class SplashActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().requestFeature(Window.FEATURE_ACTION_BAR);
getSupportActionBar().hide();
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_splash);
new Handler().postDelayed(new Runnable() {
#Override
public void run() {
Intent i = new Intent(SplashActivity.this,
MainActivity.class);
startActivity(i);
finish();
}
}, 4000);
}}

Start new Activity after few seconds with BroadcastReceiver

I would like to start new activity after few seconds with BroadcastReceiver. New Activity needs to be started even if the app is closed in the meantime.
For now I have this but nothing happens when I run it:
Main.java
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button button = (Button) findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent intent = new Intent(getApplicationContext(), Receiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(getApplicationContext(), 1, intent, 0);
int seconds = 5;
Calendar calendar = Calendar.getInstance();
calendar.add(Calendar.SECOND, seconds);
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
alarmManager.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), pendingIntent);;
}
});
}
Receiver.java
public class Receiver extends BroadcastReceiver {
private PowerManager.WakeLock mWakelock;
#SuppressWarnings("deprecation")
private KeyguardManager.KeyguardLock mLock;
private static ContentResolver sResolver;
#SuppressWarnings("deprecation")
#Override
public void onReceive(Context paramContext, Intent intent) {
this.mWakelock = ((PowerManager) paramContext.getSystemService("power"))
.newWakeLock(805306394/* | PowerManager.ON_AFTER_RELEASE */,
"wakelock");
this.mWakelock.acquire();
this.mLock = ((KeyguardManager) paramContext
.getSystemService("keyguard")).newKeyguardLock("");
this.mLock.disableKeyguard();
setLockPatternEnabled(true);
sResolver = paramContext.getContentResolver();
Intent startMain;
startMain = new Intent(paramContext, NewActivity.class);
startMain.setAction("com.name.NewActivity");
startMain.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
paramContext.startActivity(startMain);
}
/**
* used for to enable lock in all patterns
*
* #param enabled
*/
#SuppressWarnings("deprecation")
public static void setLockPatternEnabled(boolean enabled) {
setBoolean(android.provider.Settings.System.LOCK_PATTERN_ENABLED,
enabled);
}
private static void setBoolean(String systemSettingKey, boolean enabled) {
android.provider.Settings.System.putInt(sResolver, systemSettingKey,
enabled ? 1 : 0);
}
}
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.name" >
<uses-permission android:name="android.permission.DISABLE_KEYGUARD"/>
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:theme="#android:style/Theme.Light.NoTitleBar" >
<activity
android:name=".Main"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.name.NewActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="com.name.NewActivity" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
</application>
</manifest>
Does anyone know where is the problem? I also need that this new Activity unlocks the screen if it's locked, like alarm or call does.

You can do something like this: (ignore this one)
int millis = 500;
new Handler().postDelayed(new Runnable() {
#Override
public void run() {
startActivity(new Intent(SplashScreenActivity.this, HomeActivity.class));
SplashScreenActivity.this.finish();
}
}, millis);
Update 1 (should work): Try this in your MainActivity, your probably counting time in wrong way so use calendar. If it works, I'll try to explain.
Intent intent = new Intent(this, Receiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 1, intent, 0); //Or you can get broadcast in your way.
int seconds = 25;
Calendar calendar = Calendar.getInstance();
calendar.add(Calendar.SECOND, seconds);
alarmManager.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), pendingIntent);
Update 2: You should register your receiver in the manifest. In some cases there are intent filters on receivers but I it should work like that. Be sure that name of your package and receiver are correct.
<application ...>
<activity ...>
...
<receiver android:name=".package.YourReceiver">
</receiver>
...
</application>

AlarmManager broadcast not being received

I have been trying to slowly learn the Android API over the past month. I have read documentation, viewed examples and can't seem to figure out what I'm doing incorrectly. Basically the app sets an alarm 1 minute exactly after the app was started.
The issue I am currently having is after setting an alarm, it isn't being received. Here's what I have:
SetAlarmActivity.java
public class SetAlarmActivity extends AppCompatActivity {
private final String TAG = "AlarmTest";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_set_alarm);
Calendar c = Calendar.getInstance();
c.add(Calendar.MINUTE, 1);
Log.d(TAG, "Alarm time is " + c.getTime());
// set the intent to launch our SetAlarmActivity
Intent alarmIntent = new Intent(SetAlarmActivity.this, SetAlarmActivity.class);
// retrieve a PendingIntent to perform a Broadcast
PendingIntent pendingAlarmIntent = PendingIntent.getBroadcast(SetAlarmActivity.this, 0, alarmIntent, 0);
// grab the Alarm Service and tell it to call our Intent at the set time
AlarmManager alarmManager = (AlarmManager)getSystemService(ALARM_SERVICE);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
alarmManager.setExact(AlarmManager.RTC_WAKEUP, c.getTimeInMillis(), pendingAlarmIntent);
}else{
alarmManager.set(AlarmManager.RTC_WAKEUP, c.getTimeInMillis(), pendingAlarmIntent);
}
}
}
AlarmReceiver.java
public class AlarmReceiver extends WakefulBroadcastReceiver {
private final String TAG = "AlarmTest";
#Override
public void onReceive(Context context, Intent intent){
Log.d(TAG, "Received broadcast!");
}
}
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="bz.bdu.alarmtest" >
<uses-permission android:name="android.permission.WAKE_LOCK" />
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:supportsRtl="true"
android:theme="#style/AppTheme" >
<activity android:name=".SetAlarmActivity" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver android:name=".AlarmReceiver" />
</application>
</manifest>

You have to create the intent between the Current activity and receiver class. change your code like this.
Intent intent = new Intent(SetAlarmActivity.this, AlarmReceiver.class);

change
Intent alarmIntent = new Intent(SetAlarmActivity.this,
SetAlarmActivity.class);
to
Intent alarmIntent = new Intent(SetAlarmActivity.this,
AlarmReceiver.class);
then its works fine

Get from Android BroadcastReceiver to a UI

I have a receiver that works well, but I can't seem to show a proper UI, although the toast appears correctly. As far as I can tell, this is caused by Android requiring the class to extend Activity, however, the class already extends BroadcastReceiver, so I can't do this.
So, I tried to do an Intent, but this failed too. There are no errors, but the screen doesn't show. Source code is below.
Broadcast (Method in AndyRoidAlarm)
public void setAlarm(){
Intent intent = new Intent(AndyRoidAlarm.this, Reciever.class);
PendingIntent sender = PendingIntent.getBroadcast(AndyRoidAlarm.this,
0, intent, 0);
// We want the alarm to go off 30 seconds from now.
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.add(Calendar.SECOND, 10);
// Schedule the alarm!
AlarmManager am = (AlarmManager)getSystemService(ALARM_SERVICE);
am.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), sender);
// Tell the user about what we did.
if (mToast != null) {
mToast.cancel();
}
mToast = Toast.makeText(AndyRoidAlarm.this, "Alarm Scheduled for 30secs", Toast.LENGTH_LONG);
mToast.show();
}
Reciever
public class Reciever extends BroadcastReceiver
{
#Override
public void onReceive(Context context, Intent intent)
{
Toast.makeText(context, "Alarm Received", Toast.LENGTH_LONG).show();
Intent i = new Intent();
i.setClass(context, AlarmRing.class);
}
}
Reciever V2
#Override
public void onReceive(Context context, Intent intent)
{
Toast.makeText(context, "Alarm Received", Toast.LENGTH_LONG).show();
Intent foo = new Intent(context, AlarmRing.class);
//foo.putExtra("id", "id");//example, if you wish to pass custom variables
context.startActivity(foo);
}
AlarmRing
public class AlarmRing extends Activity {
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.alarm);
MediaPlayer mp = MediaPlayer.create(getBaseContext(), R.raw.sweetchild);
mp.start();
}
Manifest
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.comaad.andyroidalarm"
android:versionCode="1"
android:versionName="1.0">
<application android:icon="#drawable/icon" android:label="#string/app_name">
<activity android:name=".AndyRoidAlarm"
android:label="#string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver android:name="com.comaad.andyroidalarm.Reciever" android:enabled="true">
<intent-filter>
<action android:name="com.comaad.andyroidalarm.Reciever"></action>
</intent-filter>
</receiver>
<activity android:name=".AlarmRing"></activity>
</application>
</manifest>
}

In a BroadcastReceiver onReceive() method, if you need a Context (e.g., to create an Intent), use the Context that is passed to you as a parameter of onReceive(). You even have this code in your onReceive() -- you're just not doing anything with the resulting Intent (e.g., calling startActivity()).

Intent foo = new Intent(this, AlarmRing.class);
foo.putExtra("id", id);//example, if you wish to pass custom variables
this.startActivity(foo);
Edit
Check out this example to use BroadcastReciever within an Activity. http://almondmendoza.com/2009/01/04/getting-battery-information-on-android/