Develop Reference

Passing countdown timer value to next activity

i'm trying to pass the countdown timer value as textview to next activity, but i don't know how, do i need do use intent.putextra() ?
There is my code:
countDownTimer = new CountDownTimer(5000, 1000) {
#SuppressLint("DefaultLocale")
public void onTick(long millisUntilFinished) {
timpRamas.setText(String.format("%d:%d",
TimeUnit.MILLISECONDS.toMinutes(millisUntilFinished),
TimeUnit.MILLISECONDS.toSeconds(millisUntilFinished) -
TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(millisUntilFinished))));
}
public void onFinish() {
Intent intent = new Intent(c1_1.this,TimpExpirat.class);
startActivity(intent);
finish();
}
}.start();

You must pass the data of the textView to the next activity and in the next activity you can set the data in another view or do whatever with it:
public void onFinish() {
Intent intent = new Intent(c1_1.this,TimpExpirat.class);
intent.putExtra("data" , timpRamas.getText().toString());
startActivity(intent);
finish();
}
In the TimpExpirat activity:
//get the data in onCreate()
Intent intent = getIntent();
String time = intent.getStringExtra("data");
//time now has the time that was last set on your textview, you can set it
//to a new textview or do whatever with it.

Need some help troubleshooting code that schedules daily notifications

I am new to android programming and just started working on my first app recently. I am trying to create a daily notification that a user would get at the same time every day. I've looked through documentation and some tutorials and came up with this. For some reason the code below does not work. It has no errors, runs just fine, but doesn't do the job and I can't seem to find the problem. There is also some code that is responsible for re-scheduling notifications when the device restarts but I don't think the problem lies there since I don't even get the initial notifications.
MainActivity.java
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
show = (Button)findViewById(R.id.btn_show);
show.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
startAlarm(true,true);
}
});
myWebView = (WebView)findViewById(R.id.webView1);
WebSettings webSettings = myWebView.getSettings();
webSettings.setJavaScriptEnabled(true);
myWebView.loadUrl("http://google.com");
myWebView.setWebViewClient(new WebViewClient());
}
private void startAlarm(boolean isNotification, boolean isRepeat) {
AlarmManager manager = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
Intent myIntent;
PendingIntent pendingIntent;
// SET TIME HERE
Calendar calendar= Calendar.getInstance();
calendar.set(Calendar.HOUR_OF_DAY,14);
calendar.set(Calendar.MINUTE,45);
myIntent = new Intent(MainActivity.this,AlarmNotificationReceiver.class);
pendingIntent = PendingIntent.getBroadcast(this,0,myIntent,0);
if(!isRepeat)
manager.set(AlarmManager.RTC_WAKEUP, SystemClock.elapsedRealtime()+3000,pendingIntent);
else
manager.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), AlarmManager.INTERVAL_DAY,pendingIntent);
}
AlarmNotificationReciever.Java
public class AlarmNotificationReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
NotificationCompat.Builder builder = new NotificationCompat.Builder(context);
Intent myIntent = new Intent(context, MainActivity.class);
PendingIntent pendingIntent = PendingIntent.getActivity(
context,
0,
myIntent,
FLAG_ONE_SHOT );
builder.setAutoCancel(true)
.setDefaults(Notification.DEFAULT_ALL)
.setWhen(System.currentTimeMillis())
.setSmallIcon(R.mipmap.ic_launcher)
.setContentTitle("Zodiac")
.setContentIntent(pendingIntent)
.setContentText("Check out your horoscope")
.setDefaults(Notification.DEFAULT_LIGHTS | Notification.DEFAULT_SOUND)
.setContentInfo("Info");
NotificationManager notificationManager = (NotificationManager)context.getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(1,builder.build());
}
}
It should basically schedule a notification at 14:45 after pressing the button but for some reason it doesn't.

Since Android Oreo, implicit broadcast receivers won’t work when
registered in the AndroidManifest.xml
To use Implicit Receivers in your application, you need to define them programmatically in your code, using
registerReceiver().
3.Using registerReceiver() we can programmatically register and unregisterReceiver() during the lifecycle of the activity. This way
implicit receivers would only be called when our
activity/application is alive and not at other times.
we working fine:
[public class MainActivity extends AppCompatActivity {
Button show;
WebView myWebView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// register custom intent filter
*registerReceiver(new AlarmNotificationReceiver(),new IntentFilter(Intent.ACTION_BATTERY_CHANGED));*
\[enter image description here\]\[1\]
show = (Button)findViewById(R.id.btn_show);
show.setOnClickListener(new View.OnClickListener() {
#RequiresApi(api = Build.VERSION_CODES.N)
#Override
public void onClick(View v) {
startAlarm(true,true);
}
});
myWebView = (WebView)findViewById(R.id.webView1);
WebSettings webSettings = myWebView.getSettings();
webSettings.setJavaScriptEnabled(true);
myWebView.loadUrl("http://google.com");
myWebView.setWebViewClient(new WebViewClient());
}
#RequiresApi(api = Build.VERSION_CODES.N)
private void startAlarm(boolean isNotification, boolean isRepeat) {
AlarmManager manager = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
Intent myIntent;
PendingIntent pendingIntent;
// SET TIME HERE
Calendar calendar= Calendar.getInstance();
calendar.set(Calendar.HOUR_OF_DAY,14);
calendar.set(Calendar.MINUTE,45);
myIntent = new Intent(MainActivity.this,AlarmNotificationReceiver.class);
pendingIntent = PendingIntent.getBroadcast(this,0,myIntent,0);
if(!isRepeat)
manager.set(AlarmManager.RTC_WAKEUP, SystemClock.elapsedRealtime()+3000,pendingIntent);
else
manager.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), AlarmManager.INTERVAL_DAY,pendingIntent);
}
}][1]

1)But the above code may not work in all versions i.e notofication will not came oreo(8.0) and above.beacause of NotificationBuilder is depricated and background execution limits.Go to
2)Use Notification Channel .like below
use this code.hope its works fine!!!
void issueNotification()
{
// make the channel. The method has been discussed before.
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
makeNotificationChannel("CHANNEL_1", "Example channel", NotificationManager.IMPORTANCE_DEFAULT);
}
// the check ensures that the channel will only be made
// if the device is running Android 8+
NotificationCompat.Builder notification =
new NotificationCompat.Builder(this, "CHANNEL_1");
// the second parameter is the channel id.
// it should be the same as passed to the makeNotificationChannel() method
notification
.setSmallIcon(R.mipmap.ic_launcher) // can use any other icon
.setContentTitle("Notification!")
.setContentText("This is an Oreo notification!")
.setNumber(3); // this shows a number in the notification dots
NotificationManager notificationManager =
(NotificationManager)getSystemService(NOTIFICATION_SERVICE);
assert notificationManager != null;
notificationManager.notify(1, notification.build());
// it is better to not use 0 as notification id, so used 1.
}

How to back to Main activity from the notification activity?

When I press the notification the activity opens, but when I click back the App go to background and still on the same activity.
I wanna go back to MainActivity when I click back. what's wrong in my code?
public class MainActivity extends AppCompatActivity {
NotificationManagerCompat notificationManager;
NotificationCompat.Builder n;
String ID = "a" ;
int id=1 ;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void b2(View view) {
Intent i = new Intent(MainActivity.this, Main2.class);
TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
stackBuilder.addParentStack(MainActivity.class);
stackBuilder.addNextIntent(i);
PendingIntent pi = stackBuilder.getPendingIntent(0,PendingIntent.FLAG_UPDATE_CURRENT);
n = new NotificationCompat.Builder(this, ID)
.setSmallIcon(R.drawable.xx)
.setContentTitle("don't forget")
.setContentText("Hello0o0o0o")
.setContentIntent(pi)
.setAutoCancel(true);
notificationManager = NotificationManagerCompat.from(this);
notificationManager.notify(id , n.build());
id++;
}
public void b1(View view) {
Intent i4 = new Intent(this,Read.class);
startActivity(i4);
}
}

From your code I don't see the problem, but you could override the onBackPressed() function to move back to MainActivity. It's a solution. Also check if you actually are calling this function b2.

Error with Notification.Builder in notify

Hello I am new to Android, and I 'm trying to create notifications Notification.Builder and I failed . When launching the notification I get error
nm.notify(IDNOTIFICACIONUNO,notif); // Error in notif
I have downloaded the API 'S 16 17 18 19 23,
and this is all code :
public class MainActivity extends AppCompatActivity {
NotificationManager nm;
private static final int IDNOTIFICACIONUNO = 1;
Notification notif;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button btnLanzar = (Button) findViewById(R.id.boton_notificacion);
btnLanzar.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent i = new Intent(getApplicationContext(),segundaVentana.class);
PendingIntent intencionPendiente = PendingIntent.getActivity(getApplicationContext(),0,i,0);
Notification.Builder notif = new Notification.Builder(getApplicationContext());
notif.setSmallIcon(R.drawable.tree);
notif.setTicker("App Nature ¡TIP!");
notif.setWhen(System.currentTimeMillis());
notif.setContentTitle("App Nature ¡TIP!");
notif.setContentText("Cierra la llave, cuando te estes cepillando");
notif.setContentInfo("TIP");
notif.setContentIntent(intencionPendiente);
nm = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);
nm.notify(IDNOTIFICACIONUNO,notif);
}
});
}
I also libraries . Thank you for your help

there is a ` characheter after notif.setSmallIcon(R.drawable.tree);
remove that charachter and code will run.

final NotificationManager nm = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
//Connect to the button
Button iconBtn = (Button) findViewById(R.id.btn_icon);
//Set the button on click listener
iconBtn.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
Intent notificationIntent = new Intent(getApplicationContext(), MainActivity.class);
PendingIntent contentIntent = PendingIntent.getActivity(MainActivity.this, 0, notificationIntent, 0);
NotificationCompat.Builder builder = new NotificationCompat.Builder(MainActivity.this);
Notification notification = builder.setContentIntent(contentIntent).setTicker("This is a notification marquee")
.setSmallIcon(R.drawable.ic_launcher).setWhen(System.currentTimeMillis())
.setAutoCancel(true).setContentTitle("Message Title")
.setContentText("Message Content").build();
//Show the notification
nm.notify(1, notification);
}
});

Broadcast Data using Alarm Manager

I am trying to send data to my parse SDK Database using Alarm Manager.
I am able to send data without Alarm manager.
My below code is not working correctly as parse sdk database is not showing updated data.
Here is my code:
Main Activity.java
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.create_todo);
setTitle(R.string.create_todo);
alarmMgr = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
Intent intent = new Intent(this, AlarmReceiver.class);
alarmIntent = PendingIntent.getBroadcast(this, 0, intent, 0);
alarmMgr.setInexactRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP,
AlarmManager.INTERVAL_FIFTEEN_MINUTES,
AlarmManager.INTERVAL_FIFTEEN_MINUTES, alarmIntent);
}
AlarmReceiver.java
public class AlarmReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
MyAsyncTask asyncTask = new MyAsyncTask();
asyncTask.execute(new String[]{});
}
class MyAsyncTask extends AsyncTask<String,Void,String>
{
#Override
protected String doInBackground(String... params) {
try {
ParseObject parseObject = new ParseObject("Todo");
parseObject.put("name", "abc");
parseObject.save();
}
catch(ParseException e)
{
}
return null;
}
}
}

Register your broadcast in AndroidManifest.xml file
Try below code:
alarm.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + AlarmManager.INTERVAL_FIFTEEN_MINUTES , AlarmManager.INTERVAL_FIFTEEN_MINUTES, pIntent);
From above code, Below things will be happened.
first time Broadcast will be fired after 15 min. then it will be fired every 15 min.