Unable to create notification, I have checked several articles code samples look same as mine. Please check the below code and where I am doing the mistake.
Below I have pasted 2 classes. MainActivity class, where one button click should create notification. Second class, where notification is created.
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
NotificationBuilder nB=new NotificationBuilder();
#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 v) {
goToSecondActivity();
nB.createNotify();
}
});
}
private void goToSecondActivity() {
Intent intent = new Intent(this, SecondActivity.class);
startActivity(intent);
}
}
**Second class**
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.support.v4.app.NotificationCompat;
import android.support.v4.app.TaskStackBuilder;
import android.support.v7.app.AppCompatActivity;
public class NotificationBuilder extends AppCompatActivity {
void createNotify() {
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(this)
.setSmallIcon(R.drawable.ic_launcher)
.setContentTitle("My notification")
.setContentText("Hello World!");
Intent resultIntent = new Intent(this, MainActivity.class);
TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
stackBuilder.addParentStack(MainActivity.class);
stackBuilder.addNextIntent(resultIntent);
PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(
0, PendingIntent.FLAG_UPDATE_CURRENT);
mBuilder.setContentIntent(resultPendingIntent);
NotificationManager mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
mNotificationManager.notify(001, mBuilder.build());
}
}
Tried with noughat and Kitkat Apis level.
Tried using another phone, but similar results
NotificationBuilder nB=new NotificationBuilder();
You're essentially never supposed to create an Activity like this. It means several required internal components will not be properly initialized.
This means that all the instances of this in createNotify do not work as expected. The context needs to be MainActivity and not your builder class.
Stop extending NotificationBuilder to an Activity and pass the correct Context as a parameter to createNotify. Replacing most calls of this with the context should fix your code.
Related
Hey I am just learning to Android development so I am trying to make push notifications. Book I read says to build it like that. But android studio says "Builder is deprecated" about NotificationCompat.Builder(this)
I also tried to find information on the internet, but none of it works.
This is my code:
package com.example.notifications;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.NotificationCompat;
import androidx.core.app.TaskStackBuilder;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
public class MainActivity extends AppCompatActivity {
public static final int NOTIFICATION_ID = 1;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void onClick(View view){
NotificationCompat.Builder mBuilder =
(NotificationCompat.Builder) new NotificationCompat.Builder(this)
.setSmallIcon(R.drawable.ic_launcher_foreground)
.setContentText("bioba")
.setContentTitle("aboba");
Intent resultIntent = new Intent(this, MainActivity.class);
TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
stackBuilder.addParentStack(MainActivity.class);
stackBuilder.addNextIntent(resultIntent);
PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT);
mBuilder.setContentIntent(resultPendingIntent);
NotificationManager mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
mNotificationManager.notify(NOTIFICATION_ID, mBuilder.build());
}
}
I use emulator of Android 8.1
Use public Builder(#NonNull Context context, #NonNull String channelId) instead, where channelId is the NotificationChannel where the constructed Notification will be posted.
First of all I would like to thank you for clicking on this thread.
Thank you so much for taking your time to read this.
I was planning for the application push a notification on a specific time.
I followed some tutorials online but it seems it doesn't work.
There is no error message on the code itself but no notification is coming out.
Here's my "Notification_receiver.java" file:
package com.example.reviewerapplication;
import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Build;
import androidx.annotation.RequiresApi;
import androidx.core.app.NotificationCompat;
public class Notification_receiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
NotificationManager notificationManager = (NotificationManager)context.getSystemService(Context.NOTIFICATION_SERVICE);
Intent repeating_intent = new Intent(context,Chapterchoice.class);
String daily10 = "daily";
intent.putExtra("daily",daily10);
repeating_intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
PendingIntent pendingIntent = PendingIntent.getActivity(context,100,repeating_intent,PendingIntent.FLAG_UPDATE_CURRENT);
NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
.setContentIntent(pendingIntent)
.setSmallIcon(R.drawable.ic_launcher)
.setContentTitle("Sample Title")
.setContentText("same message")
.setAutoCancel(true);
if (intent.getAction().equals("MY_NOTIFICATION_MESSAGE")) {
notificationManager.notify(100, builder.build());
}
}
}
This is what is on my MainActivity:
//Daily Notification
val calendar = Calendar.getInstance()
calendar.set(Calendar.HOUR_OF_DAY,21)
calendar.set(Calendar.MINUTE,53)
calendar.set(Calendar.SECOND,0)
val intent2 = Intent(this, Notification_receiver::class.java)
intent2.setAction("MY_NOTIFICATION_MESSAGE")
var pendingIntent = PendingIntent.getBroadcast(this,100,intent2,PendingIntent.FLAG_UPDATE_CURRENT )
var alarmManager = getSystemService(Context.ALARM_SERVICE) as AlarmManager
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP,calendar.timeInMillis,AlarmManager.INTERVAL_DAY,pendingIntent)
I actually got it fixed just now.
my issue is that I used "activity" in the Manifest instead of using "receiver"
Updated MyService #CommonsWare
i have a service that if started will set up an alarm that triggers the notification.
This works fine and the alarms are canceled if the service is stopped.
i am trying to get the notification to open a new activity class but can not get it done
my service class is the following:
package com.example.andtip;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.support.v4.app.NotificationCompat;
public class BReceiver extends BroadcastReceiver {
private static final int MY_NOTIFICATION_ID=1;
NotificationManager notificationManager;
Notification myNotification;
public void onReceive(Context context, Intent intent) {
Intent myIntent = new Intent(context, DoSomething.class);
PendingIntent pi = PendingIntent.getBroadcast(context, 0, new Intent("com.example.andtip"),0 );
PendingIntent pi2 = PendingIntent.getActivity(context, 0, myIntent,0 );
myNotification=new NotificationCompat.Builder(context)
.setContentTitle("This is a notification from the example alarm application.")
.setContentText("Notification")
.setTicker("Notification!")
.setWhen(System.currentTimeMillis())
.setContentIntent(pi)
.setDefaults(Notification.DEFAULT_SOUND)
.setAutoCancel(true)
.setSmallIcon(R.drawable.ic_launcher)
.build();
notificationManager = (NotificationManager)context.getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(MY_NOTIFICATION_ID, myNotification);
}
}
how should i link the intent pi2 to the notification?
i am trying to get the notification to open a new activity class but can not get it done
You are using getBroadcast() to create your PendingIntent. Use getActivity() to create a PendingIntent that starts up an activity. Make sure that the Intent you put in the PendingIntent is for an activity, and make sure that the activity has its entry in the manifest.
there're two problems here. I try to let user select a specific time to make app reminder users to use app. Once user set up a time say 8:00 pm. The notification should pop up every day. However, After I used
"NotificationManager" and "Notification"
first of all, there's nothing pop-up. For example, now is 1:19 am in AU, then, i set-up this app to 1:20 am to display the notification in the status bar as a test.
Secondly, if in my TabBar class i use
nm.cancel(getIntent().getExtras().getInt("NotifID"));
It will get a null pointer exception
Here is my code:
TabBar.class
NotificationManager nm = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);
nm.cancel(getIntent().getExtras().getInt("NotifID"));
Notification.class
package com.example.tabpro;
import java.util.Calendar;
import android.app.Activity;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TimePicker;
public class SettingNotification extends Activity{
TimePicker timePicker;
#Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.setting_notification);
Button btnset = (Button) findViewById(R.id.btnSetAlarm);
btnset.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
timePicker = (TimePicker) findViewById(R.id.timePicker_settime);
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.HOUR_OF_DAY, timePicker.getCurrentHour());
calendar.set(Calendar.MINUTE, timePicker.getCurrentMinute());
calendar.set(Calendar.SECOND, 0);
Intent i = new Intent("com.example.tabpro.DisplayNotification");
Intent i2 = new Intent(SettingNotification.this, TabBar.class);
i.putExtra("NotifID", 1);
PendingIntent displayIntent = PendingIntent.getActivity(
getBaseContext(), 0, i, 0);
alarmManager.set(AlarmManager.RTC_WAKEUP,
calendar.getTimeInMillis(), displayIntent);
startActivity(i2);
}
});
}
}
DisplayNotification.class
package com.example.tabpro;
import android.app.Activity;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Intent;
import android.os.Bundle;
public class DisplayNotification extends Activity {
#Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
int notifID = getIntent().getExtras().getInt("NotifID");
Intent i = new Intent("com.example.tabpro.TabBar");
i.putExtra("NotifID", notifID);
PendingIntent detailsIntent = PendingIntent.getActivity(this, 0, i, 0);
NotificationManager nm = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);
Notification notif = new Notification(R.drawable.ic_launcher, "Time's up!", System.currentTimeMillis());
CharSequence from = "AlarmManager - Time's up!";
CharSequence message = "This is your alert, courtesy of the AlarmManager";
notif.setLatestEventInfo(this, from, message, detailsIntent);
finish();
}
}
You need to call notify() on your NotificationManager to actually show the Notification. Since you never call this method, your Notification is never shown.
Your NullPointerException is likely a different problem. For that, you should do some debugging yourself. First, you need to determine what is null. Then determine why it is null and fix it. In your code, the most likely candidates for causing the NPE in TabBar are nm, getIntent(), and getExtras().
Hope this helps :
You need to call notify() method to display notification in your notification tray of your device.
Below is the code for that:
Notification notification;
PendingIntent contentIntent = PendingIntent.getActivity(context, 0,new Intent(context, YourActivity.class), 0);
NotificationCompat.Builder builder = new NotificationCompat.Builder(context);
notification = builder.setContentIntent(contentIntent)
.setSmallIcon(icon).setTicker(yourappname).setWhen(0)
.setAutoCancel(true).setContentTitle(yourappname)
.setContentText(yourmessage).build();
notificationManager.notify(0, notification);
In the bottom right corner of my standard Android notification I will not see time (eg 12:00) rather than a pattern like that: 11/1/16. Always 3 numbers diveded by "/". Anybody know the problem?
I don't khow, how you make your notification but i think you should use : System.currentTimeMillis()
Example :
package com.test;
import android.app.Activity;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Intent;
import android.os.Bundle;
public class TestActivity extends Activity {
private NotificationManager notificationManager;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
notificationManager = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);
showNotification("My notification",android.R.id.text1);
}
private void showNotification(CharSequence text, int idNotify) {
Notification notification = new Notification(R.drawable.icon, text, System.currentTimeMillis());
Intent intent = new Intent();
intent.setClassName("com.test","com.test.TestActivity");
PendingIntent contentIntent = PendingIntent.getActivity(TestActivity.this, 0,intent,0);
notification.setLatestEventInfo(this, "My Notification",text, contentIntent);
notification.flags |= Notification.FLAG_AUTO_CANCEL;
notificationManager.notify(idNotify, notification);
}
}