I need to send you a notification every time someone requests a friend. How to create this notification I already know but I did a test app that sends via the action of a button. In this case the user who is going to receive may not be with the app open. How do I submit this notification? Do I make a thread that runs at each time?
Sending notification without opening the application
1
asked by anonymous 23.10.2015 / 14:40
2 answers
2
The ideal is to use a service using an IntentService that checks the need to show the notification from time to time, simple and practical. When I used my application I would check data in a WebApi and then display the notification.
package servicos;
import android.app.IntentService;
import android.content.Intent;
public class ServicoNotificacaoWebApi extends IntentService {
private long plngIntervaloVerificacao;
private boolean pblnServicoAtivo;
/**
* Construtor
*/
public ServicoNotificacaoWebApi() {
super("ServicoNotificacao");
}
@Override
protected void onHandleIntent(Intent intent) {
pblnServicoAtivo = true;
// Multiplicar por 1000, pois é em milisegundos
plngIntervaloVerificacao = (intent.getLongExtra("INTERVALO_VERIFICACAO", 300)) * 1000;
while (pblnServicoAtivo) {
ConsultarWebApi();
}
}
@Override
public void onDestroy() {
super.onDestroy();
// Ao encerrar o serviço, altera o flag para a thread parar
pblnServicoAtivo = false;
}
/**
* Verifica no web service se existem
* ordens de serviços disponíveis para a equipe
*/
private void ConsultarWebApi() {
try {
// Tempo de espera até a próxima verificação no webapi
Thread.sleep(plngIntervaloVerificacao);
if (!pblnServicoAtivo) {
return;
}
// Não vou colocar o que eu faço para verificar a API para não ficar extenso, mais neste ponto eu exibo a notificação e no meu caso eu executo uma chamada para a tela de login de minha aplicação.
if (WEBAPI_OK)
ExibirNotificacao(this, "WEB_API", "Notificacao WebApi",
"Mensagem", R.drawable.ic_launcher,
9999, new Intent(this, ActLogin.class));
} catch (Exception e) {
// Caso seja necessário, colocar para gravar o log aqui
}
}
/**
* Exibe uma notificação
*
* @param ctxContexto Contexto
* @param strTituloNotificacao Título da notificação
* @param strTituloMensagem Título da mensagem da notificação
* @param strMensagem Mensagem
* @param intIcone Ícone da notificação
* @param intId Id da notificação (Necessário para cancelá-la)
* @param intent Intent a ser disparada pela notificação
*/
private void ExibirNotificacao(Context ctxContexto, String strTituloNotificacao,
String strTituloMensagem, String strMensagem, int intIcone, int intId, Intent intent) {
NotificationManager notificationManager = (NotificationManager)
ctxContexto.getSystemService(Activity.NOTIFICATION_SERVICE);
Notification notification = new Notification(intIcone, strTituloNotificacao, System.currentTimeMillis());
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP |
Intent.FLAG_ACTIVITY_SINGLE_TOP |
Intent.FLAG_ACTIVITY_NEW_TASK);
notification.defaults |= Notification.DEFAULT_SOUND; // Som padrão da notificação
notification.flags = Notification.FLAG_AUTO_CANCEL; // Cancela a notificação no clique
PendingIntent pendingIntent = PendingIntent.getActivity(ctxContexto, 0, intent, 0);
notification.contentIntent = pendingIntent;
notification.setLatestEventInfo(ctxContexto, strTituloMensagem, strMensagem, pendingIntent);
notificationManager.notify(9999, notification);
}
}
To be called this IntentService should be added to the Manifest.xml of your application:
<service
android:name="servicos.ServicoNotificacaoWebApi"
android:exported="false"
android:process="servicos.ServicoNotificacaoWebApi" >
<intent-filter>
<action android:name="SERVICO_NOTIFICACAO_WEB_API" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</service>
And at the time of calling, just call Intent with the name you put in Manifest.xml:
Intent lintentServico = new Intent("SERVICO_NOTIFICACAO_OS_AVULSA"); lintentServico.putExtra("INTERVALO_VERIFICACAO", 1);
// Inicia o serviço de notificação
pctxContexto.startService(lintentServico);
23.10.2015 / 14:56
0
Hello, I was having the same problem and after a long time searching for the answer and testing I got using AlarmManager and BroadcastReceiver, what I needed:
I have a web system where someone registers notifications in the database, and an API that returns a json with the requests, I needed something to run with the app open or closed checking if it has new messages and notifying the user.
Home
My AndroidManifest.xml
<receiver
android:name=".Servico.BootReciever"
android:enabled="true"
android:exported="true">
<intent-filter>
<action android:name="ALARME_DISPARADO2"/>
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</receiver>
On my onCreate of Activity
boolean alarmeativo = (PendingIntent.getBroadcast( this, 0, new Intent( "ALARME_DISPARADO2" ), PendingIntent.FLAG_NO_CREATE ) == null);
if(alarmeativo) {
Intent intent = new Intent( "ALARME_DISPARADO2" );
PendingIntent p = PendingIntent.getBroadcast( this, 0, intent, 0 );
Calendar c = Calendar.getInstance();
c.setTimeInMillis( System.currentTimeMillis() );
c.add( Calendar.SECOND, 3 );
AlarmManager alarm = (AlarmManager) getSystemService( ALARM_SERVICE );
alarm.set( AlarmManager.RTC_WAKEUP, c.getTimeInMillis(), p );
}
I check if the alarm is already created, I assign the Intent that will be executed referring to my BroadcastReceiver, assign a time to start and configure the alarm RTC_WAKEUP to execute even with the device blogged, done in BroadcastReceiver, start a Task, because I need to post a post on a web page, using recursion to continue to post. Home My BootReciever.java
public class BootReciever extends BroadcastReceiver {
public static Usuario us;
public static Notifi not;
public static NotifiSetor notSet;
public static Agenda notAg;
public static boolean Iniciar = true;
public static boolean saida;
int x = 0;
@Override
public void onReceive(Context context, Intent intent) {
Iniciar = false;
Usuario u = new Usuario( context );
u.Select();
us = u;
Notifi n = new Notifi( context );
not = n;
NotifiSetor ns = new NotifiSetor(context );
notSet = ns;
Agenda ag = new Agenda( context );
notAg = ag;
NotificationTask us = new NotificationTask();
us.execute(context);
}
public boolean isOnline(Context context) {
boolean conectado;
try {
ConnectivityManager conectivtyManager = (ConnectivityManager) context.getSystemService( Context.CONNECTIVITY_SERVICE );
if (conectivtyManager.getActiveNetworkInfo() != null
&& conectivtyManager.getActiveNetworkInfo().isAvailable()
&& conectivtyManager.getActiveNetworkInfo().isConnected()) {
conectado = true;
} else {
conectado = false;
}
} catch (Exception e) {
conectado = false;
}
return conectado;
}
private class NotificationTask extends AsyncTask<Context, Void, Context> {
@Override
protected Context doInBackground(Context... ct) {
saida = false;
try {
Agenda a = new Agenda(notAg.getCt());
List<Agenda> list = a.SelectExibir();
if(list != null) {
for (int x = 0; x < list.size(); x++) {
long date1 = System.currentTimeMillis();
SimpleDateFormat sdf = new SimpleDateFormat("HH:mm");
String dateString = sdf.format(date1);
if(list.get(x).getExibir().equals(dateString)) {
Calendar cal = Calendar.getInstance( TimeZone.getTimeZone("GMT"));
Date currentLocalTime = cal.getTime();
DateFormat date = new SimpleDateFormat("dd-MM-yyyy");
date.setTimeZone(TimeZone.getTimeZone("GMT"));
String localTime = date.format(currentLocalTime);
NewMessageNotification.notify(ct[0], list.get(x).getTitulo(), list.get(x).getMensagem(), list.get(x).getID());
a.setID(list.get(x).getID());
a.setUltimo_Exib(localTime);
a.UpdateExibir();
}
}
}
} catch (Exception e) {
}
if(isOnline(ct[0])) {
//Log.d("",String.valueOf( x++ ));
// notificaçoes agendadas
try {
//buscar na api
// buscar no webservice
String json = "json a ser enviando para API";
HttpService servi = new HttpService();
String retorno = servi.post(json);
try {
JSONObject jsonObj = new JSONObject(retorno);
JSONArray array = jsonObj.getJSONArray("Res");
if (jsonObj.getBoolean("Response")) {
for (int i = 0; i < array.length(); i++) {
// notificacao
notAg.setID(array.getJSONObject(i).getInt("ID"));
if (!notAg.ValidaId()) {
Calendar cal = Calendar.getInstance(TimeZone.getTimeZone("GMT"));
//cal.add(Calendar.DAY_OF_MONTH, -1);
Date currentLocalTime = cal.getTime();
DateFormat date = new SimpleDateFormat("dd-MM-yyyy");
date.setTimeZone(TimeZone.getTimeZone("GMT"));
String localTime = date.format(currentLocalTime);
notAg.setTitulo(array.getJSONObject(i).getString("TITULO"));
notAg.setMensagem(array.getJSONObject(i).getString("MENSAGEM"));
notAg.setCadastro(array.getJSONObject(i).getString("DATA_CAD"));
notAg.setExibir(array.getJSONObject(i).getString("REPETIR"));
notAg.setUltimo_Exib(localTime);
notAg.setStatus(array.getJSONObject(i).getInt("STATUS"));
notAg.Insert();
} else {
notAg.setTitulo(array.getJSONObject(i).getString("TITULO"));
notAg.setMensagem(array.getJSONObject(i).getString("MENSAGEM"));
notAg.setCadastro(array.getJSONObject(i).getString("DATA_CAD"));
notAg.setExibir(array.getJSONObject(i).getString("REPETIR"));
notAg.setStatus(array.getJSONObject(i).getInt("STATUS"));
notAg.Update();
}
}
}
} catch (Exception e) {
}
} catch (Exception e) {
// Restore interrupt status.
//Thread.currentThread().interrupt();
}
// notificaçoes geral equipe
try {
//buscar na api
// buscar no webservice
String json = "json a ser enviando para API";
HttpService servi = new HttpService();
String retorno = servi.post(json);
try {
JSONObject jsonObj = new JSONObject(retorno);
JSONArray array = jsonObj.getJSONArray("Res");
if (jsonObj.getBoolean("Response")) {
for (int i = 0; i < array.length(); i++) {
// notificacao
not.setID(array.getJSONObject(i).getInt("ID"));
if (!not.ValidaId()) {
not.setTitulo(array.getJSONObject(i).getString("TITULO"));
not.setMensagem(array.getJSONObject(i).getString("MENSAGEM"));
not.setData(array.getJSONObject(i).getString("DATA_CAD"));
not.setStatus(array.getJSONObject(i).getInt("STATUS"));
not.Insert();
NewMessageNotification.notify(ct[0], not.getTitulo(), not.getMensagem(), not.getID());
}
}
}
} catch (Exception e) {
}
} catch (Exception e) {
// Restore interrupt status.
//Thread.currentThread().interrupt();
}
// notificaçoes geral setor
try {
//buscar na api
// buscar no webservice
String json = "json a ser enviando para API";
HttpService servi = new HttpService();
String retorno = servi.post(json);
try {
JSONObject jsonObj = new JSONObject(retorno);
JSONArray array = jsonObj.getJSONArray("Res");
if (jsonObj.getBoolean("Response")) {
for (int i = 0; i < array.length(); i++) {
// notificacao
notSet.setID(array.getJSONObject(i).getInt("ID"));
if (!notSet.ValidaId()) {
notSet.setTitulo(array.getJSONObject(i).getString("TITULO"));
notSet.setMensagem(array.getJSONObject(i).getString("MENSAGEM"));
notSet.setData(array.getJSONObject(i).getString("DATA_CAD"));
notSet.setStatus(array.getJSONObject(i).getInt("STATUS"));
notSet.Insert();
NewMessageNotification.notify(ct[0], notSet.getTitulo(), notSet.getMensagem(), notSet.getID());
}
}
}
} catch (Exception e) {
}
// exibir
} catch (Exception e) {
// Restore interrupt status.
//Thread.currentThread().interrupt();
}
}
try {
// recursividade para continuar executando
doInBackground( ct[0] );
} catch(Exception e) {
}
return ct[0];
}
@Override
protected void onPostExecute(Context result) {
// Após a inserção da nota, vamos mostrar um Toast ao usuário
saida = true;
Iniciar = true;
doInBackground(result);
}
}
}
Result
I / art: Increasing code cache capacity to 128KB
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I / art: Background sticky concurrent mark sweep GC freed 3085 (212KB) AllocSpace objects, 2 (40KB) LOS objects, 1% free, 28MB / 28MB, paused 5.805ms total 16.525ms
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Application terminated.
And testing on my phone worked properly and with little delay time to display the notifications with the application closed and open, you can also call a Service or an IntetService in onReceive.
08.06.2018 / 19:27