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Android SDK used by developers to provide Backendless API in apps.
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package com.backendless.push;
import android.app.*;
import android.content.Context;
import android.content.Intent;
import android.os.SystemClock;
import android.util.Log;
import android.widget.RemoteViews;
import android.widget.Toast;
import com.backendless.Backendless;
import com.backendless.async.callback.AsyncCallback;
import com.backendless.exceptions.BackendlessFault;
import com.backendless.messaging.PublishOptions;
import java.util.*;
import java.util.concurrent.TimeUnit;
public class BackendlessPushService extends IntentService implements PushReceiverCallback
{
static final String TAG = "com.backendless.push.BackendlessPushService";
private static final Random random = new Random();
private static final int MAX_BACKOFF_MS = (int) TimeUnit.SECONDS.toMillis( 3600 );
private static final String TOKEN = Long.toBinaryString( random.nextLong() );
private static final String EXTRA_TOKEN = "token";
private PushReceiverCallback callback;
public BackendlessPushService()
{
this( "BackendlessPushService" );
}
public BackendlessPushService( String name )
{
super( name );
this.callback = this;
}
public BackendlessPushService( PushReceiverCallback callback )
{
super(null);
this.callback = callback;
}
/**
* At this point {@link com.backendless.push.BackendlessBroadcastReceiver}
* is still holding a wake lock
* for us. We can do whatever we need to here and then tell it that
* it can release the wakelock. This sample just does some slow work,
* but more complicated implementations could take their own wake
* lock here before releasing the receiver's.
*
* Note that when using this approach you should be aware that if your
* service gets killed and restarted while in the middle of such work
* (so the Intent gets re-delivered to perform the work again), it will
* at that point no longer be holding a wake lock since we are depending
* on SimpleWakefulReceiver to that for us. If this is a concern, you can
* acquire a separate wake lock here.
*/
@Override
protected void onHandleIntent( Intent intent )
{
try
{
handleIntent( this, intent );
}
finally
{
BackendlessBroadcastReceiver.completeWakefulIntent( intent );
}
}
public void onRegistered( Context context, String registrationId )
{
}
public void onUnregistered( Context context, Boolean unregistered )
{
}
public boolean onMessage( Context context, Intent intent )
{
return true;
}
public void onError( Context context, String message )
{
Log.e( TAG, "Error processing push message: " + message );
Toast.makeText( context, "Error processing push message: " + message, Toast.LENGTH_LONG ).show();
}
void handleIntent( Context context, Intent intent )
{
String action = intent.getAction();
switch ( action )
{
case GCMConstants.INTENT_FROM_GCM_REGISTRATION_CALLBACK:
handleRegistration( context, intent );
break;
case GCMConstants.INTENT_FROM_GCM_MESSAGE:
handleMessage( context, intent );
break;
case GCMConstants.INTENT_FROM_GCM_LIBRARY_RETRY:
handleRetry( context, intent );
break;
}
}
private void handleRetry( Context context, Intent intent )
{
String token = intent.getStringExtra( EXTRA_TOKEN );
if( !TOKEN.equals( token ) )
return;
// retry last call
if( GCMRegistrar.isRegistered( context ) )
GCMRegistrar.internalUnregister( context );
else
GCMRegistrar.internalRegister( context, GCMRegistrar.getSenderId( context ) );
}
private void handleMessage( final Context context, Intent intent )
{
try
{
boolean showPushNotification = callback.onMessage( context, intent );
if( showPushNotification )
{
CharSequence tickerText = intent.getStringExtra( PublishOptions.ANDROID_TICKER_TEXT_TAG );
CharSequence contentTitle = intent.getStringExtra( PublishOptions.ANDROID_CONTENT_TITLE_TAG );
CharSequence contentText = intent.getStringExtra( PublishOptions.ANDROID_CONTENT_TEXT_TAG );
if( tickerText != null && tickerText.length() > 0 )
{
int appIcon = context.getApplicationInfo().icon;
if( appIcon == 0 )
appIcon = android.R.drawable.sym_def_app_icon;
Intent notificationIntent = context.getPackageManager().getLaunchIntentForPackage( context.getApplicationInfo().packageName );
PendingIntent contentIntent = PendingIntent.getActivity( context, 0, notificationIntent, 0 );
Notification notification = new Notification.Builder( context )
.setSmallIcon( appIcon )
.setTicker( tickerText )
.setContentTitle( contentTitle )
.setContentText( contentText )
.setContentIntent( contentIntent )
.setWhen( System.currentTimeMillis() )
.build();
notification.flags |= Notification.FLAG_AUTO_CANCEL;
int customLayout = context.getResources().getIdentifier( "notification", "layout", context.getPackageName() );
int customLayoutTitle = context.getResources().getIdentifier( "title", "id", context.getPackageName() );
int customLayoutDescription = context.getResources().getIdentifier( "text", "id", context.getPackageName() );
int customLayoutImageContainer = context.getResources().getIdentifier( "image", "id", context.getPackageName() );
int customLayoutImage = context.getResources().getIdentifier( "push_icon", "drawable", context.getPackageName() );
if( customLayout > 0 && customLayoutTitle > 0 && customLayoutDescription > 0 && customLayoutImageContainer > 0 )
{
NotificationLookAndFeel lookAndFeel = new NotificationLookAndFeel();
lookAndFeel.extractColors( context );
RemoteViews contentView = new RemoteViews( context.getPackageName(), customLayout );
contentView.setTextViewText( customLayoutTitle, contentTitle );
contentView.setTextViewText( customLayoutDescription, contentText );
contentView.setTextColor( customLayoutTitle, lookAndFeel.getTextColor() );
contentView.setFloat( customLayoutTitle, "setTextSize", lookAndFeel.getTextSize() );
contentView.setTextColor( customLayoutDescription, lookAndFeel.getTextColor() );
contentView.setFloat( customLayoutDescription, "setTextSize", lookAndFeel.getTextSize() );
contentView.setImageViewResource( customLayoutImageContainer, customLayoutImage );
notification.contentView = contentView;
}
NotificationManager notificationManager = (NotificationManager) context.getSystemService( Context.NOTIFICATION_SERVICE );
notificationManager.notify( intent.getIntExtra( BackendlessBroadcastReceiver.EXTRA_MESSAGE_ID, 0 ), notification );
}
}
}
catch ( Throwable throwable )
{
Log.e( TAG, "Error processing push notification", throwable );
}
}
private void handleRegistration( final Context context, Intent intent )
{
String registrationId = intent.getStringExtra( GCMConstants.EXTRA_REGISTRATION_ID );
String error = intent.getStringExtra( GCMConstants.EXTRA_ERROR );
String unregistered = intent.getStringExtra( GCMConstants.EXTRA_UNREGISTERED );
boolean isInternal = intent.getBooleanExtra( GCMConstants.EXTRA_IS_INTERNAL, false );
// registration succeeded
if( registrationId != null )
{
if( isInternal )
{
callback.onRegistered( context, registrationId );
}
GCMRegistrar.resetBackoff( context );
GCMRegistrar.setGCMdeviceToken( context, registrationId );
registerFurther( context, registrationId );
return;
}
// unregistration succeeded
if( unregistered != null )
{
// Remember we are unregistered
GCMRegistrar.resetBackoff( context );
GCMRegistrar.setGCMdeviceToken( context, "" );
GCMRegistrar.setChannels( context, Collections.emptyList() );
GCMRegistrar.setRegistrationExpiration( context, -1 );
unregisterFurther( context );
return;
}
// Registration failed
if( error.equals( GCMConstants.ERROR_SERVICE_NOT_AVAILABLE ) )
{
int backoffTimeMs = GCMRegistrar.getBackoff( context );
int nextAttempt = backoffTimeMs / 2 + random.nextInt( backoffTimeMs );
Intent retryIntent = new Intent( GCMConstants.INTENT_FROM_GCM_LIBRARY_RETRY );
retryIntent.putExtra( EXTRA_TOKEN, TOKEN );
PendingIntent retryPendingIntent = PendingIntent.getBroadcast( context, 0, retryIntent, 0 );
AlarmManager am = (AlarmManager) context.getSystemService( Context.ALARM_SERVICE );
am.set( AlarmManager.ELAPSED_REALTIME, SystemClock.elapsedRealtime() + nextAttempt, retryPendingIntent );
// Next retry should wait longer.
if( backoffTimeMs < MAX_BACKOFF_MS )
GCMRegistrar.setBackoff( context, backoffTimeMs * 2 );
}
else
{
callback.onError( context, error );
}
}
private void registerFurther( final Context context, String GCMregistrationId )
{
final long registrationExpiration = GCMRegistrar.getRegistrationExpiration( context );
Backendless.Messaging.registerDeviceOnServer( GCMregistrationId, new ArrayList<>( GCMRegistrar.getChannels( context ) ), registrationExpiration, new AsyncCallback()
{
@Override
public void handleResponse( String registrationId )
{
GCMRegistrar.setRegistrationId( context, registrationId, registrationExpiration );
callback.onRegistered( context, registrationId );
}
@Override
public void handleFault( BackendlessFault fault )
{
callback.onError( context, "Could not register device on Backendless server: " + fault.getMessage() );
}
} );
}
private void unregisterFurther( final Context context )
{
Backendless.Messaging.unregisterDeviceOnServer( new AsyncCallback()
{
@Override
public void handleResponse( Boolean unregistered )
{
GCMRegistrar.setRegistrationId( context, "", 0 );
callback.onUnregistered( context, unregistered );
}
@Override
public void handleFault( BackendlessFault fault )
{
callback.onError( context, "Could not unregister device on Backendless server: " + fault.getMessage() );
}
} );
}
}