I have activity where I have EditText for user to enter certain data. After user writes some text and clicks button, he is waiting for a response from BroadcastReceiver. The problem is that everything works for the first time and user receive response but if user doesn't exit activity and clicks the button again, BroadcastReceiver is not firing anymore. If user closes activity and opens it again, BroadcastReceiver is again working but only for the first time.
This is a little bit confusing. Here is my code:
public void onCreate(Bundle savedInstanceState) {
mReceiver = new BroadcastReceiver() {
#Override
public void onReceive(Context c, Intent in) {
switch (getResultCode()) {
case Activity.RESULT_OK:
mStatus = true;
break;
}
}
};
getActivity().registerReceiver(mReceiver,
new IntentFilter(FLAG));
}
When user clicks button:
Intent in = new Intent(FLAG);
PendingIntent pIn = PendingIntent.getBroadcast(context, 1, in, 0);
SmsManager.getDefault().sendTextMessage("123456789", null, "text", pIn, null);
while(!mStatus){
}
mStatus = false;
Unregister receiver:
public void onPause() {
super.onPause();
getActivity().unregisterReceiver(mReceiver);
}
What do you think? Why it works only when activity is started and button is clicked for the first time?
Try this instead:
public void onPause() {
super.onPause();
// getActivity().unregisterReceiver(mReceiver);
}
public void onDestroy() {
super.onDestroy();
getActivity().unregisterReceiver(mReceiver);
}
Explanation: you should manage the receiver either in onCreate() / onDestroy() or onResume() / onPause() (corresponding lifecycle events).
Edit: make this change also (second line sets flag argument):
Intent in = new Intent(FLAG);
PendingIntent pIn = PendingIntent.getBroadcast(context, 1, in, PendingIntent.FLAG_UPDATE_CURRENT);
SmsManager.getDefault().sendTextMessage("123456789", null, "text", pIn, null);
Not sure if this will fix it because I don't know what the 0 would mean that you were using for the flag value. FLAG_UPDATE_CURRENT seems correct though.
Edit 2:
while(!mStatus){
}
You should never do that!
Related
Edit with an update at the bottom with the cause, but still no fix
I am trying to capture a notification and later replay it once I dismiss it. From what I've been able to figure out so far, I can capture a notification, but when I try create a new notification using NotificationManager.notify(), nothing happens. No errors, nothing. Is this even something I should be able to do?
Maybe I am not taking the right approach and someone can suggest a better approach. Like I stated above, I want to be able to know when a user receives a notification and to capture the notification in its entirety, so even when it's dismissed, I can restore it. Maybe there is a way to restore things from the notification history but I haven't been able to figure out fully how that works yet. Here's the code I have so far. I can successfully listen to when a notification is posted or removed. The goal is to send a broadcast when a notification is posted with the notification id and the actual Notification itself (this part works I think), and when the button is pressed, recreate the notification. When I press the button, nothing happens.
public class MainActivity extends AppCompatActivity {
private int notification_id = -1;
private Notification myNotify;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main3);
final Button button = findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Bundle extras = myNotify.extras;
String title = extras.getString("android.title");
String text = extras.getString("android.text");
NotificationManager nManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
nManager.notify(notification_id, myNotify);
}
});
}
private MyBroadcastReceiver myReceiver;
#Override
public void onResume() {
super.onResume();
myReceiver = new MyBroadcastReceiver();
final IntentFilter intentFilter = new IntentFilter("notification_restore");
LocalBroadcastManager.getInstance(this).registerReceiver(myReceiver, intentFilter);
}
#Override
public void onDestroy() {
super.onDestroy();
if (myReceiver != null)
LocalBroadcastManager.getInstance(this).unregisterReceiver(myReceiver);
myReceiver = null;
}
public class MyBroadcastReceiver extends BroadcastReceiver {
#Override
#Nullable
public void onReceive(Context context, Intent intent) {
// Here you have the received broadcast
// And if you added extras to the intent get them here too
// this needs some null checks
Bundle b = intent.getExtras();
notification_id = b.getInt("notification_id");
myNotify = b.getParcelable("notification");
}
}
}
public class MyNotificationListenerService extends NotificationListenerService {
private int notification_id;
private Notification myNotify;
#Override
public void onNotificationPosted(StatusBarNotification sbn) {
if ((sbn.getNotification().flags & Notification.FLAG_GROUP_SUMMARY) != 0) {
//Ignore the notification
return;
}
notification_id = sbn.getId();
myNotify = sbn.getNotification();
Intent intent = new Intent("notification_restore");
Bundle b = new Bundle();
b.putInt("notification_id", notification_id);
b.putParcelable("notification", myNotify);
intent.putExtras(b);
LocalBroadcastManager.getInstance(this).sendBroadcast(intent);
}
#Override
public void onNotificationRemoved(StatusBarNotification sbn) {
if ((sbn.getNotification().flags & Notification.FLAG_GROUP_SUMMARY) != 0) {
//Ignore the notification
return;
}
}
}
Edit:
So it looks like the reason my notification isn't showing up is because it complains about not finding a channel, even though the notification I am trying to replay has one. The exact error is:
E/NotificationService: No Channel found for pkg=com.gevdev.notify, channelId=bugle_default_channel, id=0, tag=null, opPkg=com.gevdev.notify, callingUid=10086, userId=0, incomingUserId=0, notificationUid=10086, notification=Notification(channel=bugle_default_channel pri=1 contentView=null vibrate=null sound=null tick defaults=0x0 flags=0x10 color=0xff2a56c6 category=msg groupKey=bugle_notification_group_key sortKey=00 actions=2 vis=PRIVATE)
I am still new to android, but my initial guess is that the channelId found bugle_default_channel isn't found under my package name, but I don't know how to fix this yet.
Figured it out
Even though the notification that I am grabbing to replay has a channel ID, the NotificationManager doesn't have that notification channel registered. I figured it based off the code found here. This is how to register it.
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
NotificationChannel notificationChannel = nManager.getNotificationChannel(myNotify.getChannelId());
if (notificationChannel == null) {
int importance = NotificationManager.IMPORTANCE_HIGH;
notificationChannel = new NotificationChannel(myNotify.getChannelId(), "Description Goes Here", importance);
notificationChannel.setLightColor(Color.GREEN);
notificationChannel.enableVibration(true);
nManager.createNotificationChannel(notificationChannel);\
}
}
Background info: I'm trying to create a service. I create it in my main activity. I know the service is running because the notification is showing. So the service doesn't stop at any point.
What i want to happen: when the screen is locked/turned off i want a certain activity to be displayed for when the screen is turned back on.
What is happening: first, When the screen is turned back on the main activity shows and then the activity i want shows over that. I dont want the main activity to show at all when the screen is turned on .
Then i changed a few things: and now the desired activity flickers on the main screen and then vanishes. It seems very unreliable and only comes a few times.
That should be enough info, here is the code so far (specifically onReceive())
public class OverlayService extends Service{
//IN THIS CLASS CHECK WHETHER LOCK BUTTON WAS PRESSED OR IF PHONE WHEN TO SLEEP.. UPON AWAKENING START THE OVERLAY ACTIVITY...
private BroadcastReceiver mReceiver;
private boolean isShowing = false;
#Override
public IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
return null;
}
private WindowManager windowManager;
WindowManager.LayoutParams params;
#Override
public void onCreate() {
super.onCreate();
windowManager = (WindowManager)getSystemService(WINDOW_SERVICE);
//Register receiver for determining screen off and if user is present
mReceiver = new OverlayStateReceiver();
IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_OFF);
filter.addAction(Intent.ACTION_USER_PRESENT);
filter.addAction(Intent.ACTION_SCREEN_ON);
registerReceiver(mReceiver, filter);
makeNotification();
}
void makeNotification() {
Notification notification = new NotificationCompat.Builder(this)
//TODO change icon
.setSmallIcon(R.drawable.test)
.setContentTitle("App")
.setContentText("service is running...")
.setPriority(Notification.PRIORITY_LOW)
.build();
startForeground(1, notification);
}
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
return START_STICKY;
}
public class OverlayStateReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals(Intent.ACTION_SCREEN_OFF)) {
Log.i("app", "load view");
showOverlayActivity(context);
}
}
}
private void showOverlayActivity(Context context) {
Intent intent = new Intent(context, OverlayActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
intent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(intent);
}
#Override
public void onDestroy() {
//unregister receiver when the service is destroy
if (mReceiver != null) {
unregisterReceiver(mReceiver);
}
//TODO remove view if it is showing and the service is destroy
super.onDestroy();
}
}
I want to pause the MediaPlayer when the user unplugs his headphones. I found out that I can use the "ACTION_AUDIO_BECOMING_NOISY" broadcast , so I tried it out !
Theoretically it works , BUT the time of receiving takes too long. The music is still playing for 3-5 seconds before it really pauses.This wouldnt be acceptable for an user.
How are other devolopers able to pause it in milliseconds ? Are there better Soloutions ?
My BroadcastReceiver which is actually for Notifications :
public class NotificationBroadcast extends BroadcastReceiver {
...
#Override
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals(android.media.AudioManager.ACTION_AUDIO_BECOMING_NOISY)) {
Intent iPause = new Intent(context , SongService.class);
iPause.putExtra("com.Hohos.mplay.Services.SongService.MEDIA_ACTION", NOTIFY_EXTRA_PAUSE);
context.startService(iPause);
}
...
}
I also added <uses-permission android:name="android.permission.ACTION_HEADSET_PLUG"/>
, which really didnt any difference
Thanks for your help guys !
To know when the user unplugs his headphones you need to listen the action ACTION_HEADSET_PLUG and check the state extra:
Broadcast Action: Wired Headset plugged in or unplugged.
The intent will have the following extra values:
state - 0 for unplugged, 1 for plugged.
name - Headset type, human
readable string
microphone - 1 if headset has a microphone, 0
otherwise
This is an example:
public class MainActivity extends Activity {
private HeadsetBroadcastReceiver mHeadsetBroadcastReceiver;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
myReceiver = new HeadsetBroadcastReceiver();
}
#Override
protected void onResume() {
IntentFilter filter = new IntentFilter(Intent.ACTION_HEADSET_PLUG);
registerReceiver(mHeadsetBroadcastReceiver, filter);
super.onResume();
}
#Override
protected void onPause() {
unregisterReceiver(mHeadsetBroadcastReceiver);
super.onPause();
}
private class HeadsetBroadcastReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals(Intent.ACTION_HEADSET_PLUG)) {
int state = intent.getIntExtra("state", -1);
if (state == 0) {
//Headset is unplugged
} else if(state == 1) {
//Headset is plugged
}
}
}
}
}
I need to close the current activity from a broadcast receiver. I'm not sure how to call finish from it, maybe there is a way to simulate a "Back" key keypress. Any implementation will be fine as long as it does the job.
#Override
public void onReceive(Context context, Intent intent) {
// How can I finish the current activity here?
}
At your broadcast receiver write:
YourCurrentActivityName.this.finish();
Or you can terminate the front activity with this.finish(); so the last open in stuck comes to front.
Update:
Code for first case:
Use of broadcast receiver to terminate activity at back stack:
public class ActivityFirstName extends Activity {
private BroadcastReceiver mFinishReceiver;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// other code
if (mFinishReceiver == null) {
IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction("com.example.ACTION_TERMINATE");// a string to identify your action
mFinishReceiver = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
// How can I finish the current activity here?
if ("com.example.ACTION_TERMINATE".equals(intent.getAction())) {
ActivityFirstName.this.finish();
}
}
};
registerReceiver(mFinishReceiver, intentFilter);
}
// other code
}
#Override
protected void onDestroy() {
super.onDestroy();
if (isFinishing()) {
if (mFinishReceiver != null) {
unregisterReceiver(mFinishReceiver);
}
}
}
}
And the front/current running activity, the sender of the broadcast:
public class ActivitySecondName extends Activity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.second);
// code code code
final Button button = (Button) findViewById(R.id.button_id);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// Perform action on click
terminateBackActivities();
}
});
}
private void terminateBackActivities() {
Intent i = new Intent("com.example.ACTION_TERMINATE"); // the two action strings MUST be same
// i.putExtra(...); // to send extra data
sendBroadcast(i);
}
}
You can simply call this.finish();
Assuming from your comment that the BroadcastReceiver is not an internal class of the activity, here is what you should do: Rather than having the broadcast receiver in a separate class, define it inside your activity like so:
private BroadcastReceiver mFinishReceiver = new BroadcastReceiver(){
#Override
public void onReceive(Context context, Intent intent){
YourActivity.this.finish();
}
};
Then, you will want to register the receiver in onResume() as such:
#Override
public void onResume(){
super.onResume();
registerReceiver(mFinishReceiver, new IntentFilter(yourIntentAction));
}
You will also want to unregister this receiver in onPause() so you don't leak it:
#Override
public void onPause(){
super.onPause();
unregisterReceiver(mFinishReceiver);
}
Then you can remove the other receiver that had its own separate class and also remove its definition in the manifest. The above example will ensure that you can always call finish() with no issues because the receiver is only registered when the activity is running, as it is internal to the activity's class.
EDIT: Change the methods to onCreate() and onDestroy() rather than onPause() and onDestroy(), according to madlymad's comment.
The ActivityManager class can give you the current foreground activity (even if it's not from your app). The getRunningTasks methods will give you a list of the running tasks, the first element of the list being the most recent launched activity.Unfortunately,this method will just give you an object of type RecentTaskInfo , not the activity itself, so there is no way to call its finish() method,I believe :/
On the other hand, if you want to close the current activity from your app, you can implement a static variable on a personal class that each activiy would set in their onResume() method. This way you will always know what activity is the current one. But I guess it's not what you are looking for.
Edit: The getRunningTasks is just intended for debug purposes, as says the doc..
As suggested by other answers you can simply call finish() on the activity in the broadcast receiver code or you can even trigger a back button press key event yourself.
this.dispatchKeyEvent(new Keyevent(ACTION_DOWN, KEYCODE_BACK));
Not sure about whether this is helpfull to you or not but its help me once and i think thats a same case here so i am answering for you.
Whenever the broadcast receiver get call, you can navigate to any activity by clicking on that broadcast message.
Just like:
#Override
public void onReceive(Context context, Intent intent) {
// My Notification Code
notificationManager = (NotificationManager)context.getSystemService(Context.NOTIFICATION_SERVICE);
int icon = R.drawable.app_icon;
//System.out.println("The ID Number is: "+Long.parseLong(intent.getData().getSchemeSpecificPart()) );
contentText = intent.getStringExtra("MyMessage");
System.out.println("The Message is: "+intent.getStringExtra("MyMessage"));
CharSequence text = "Your tax amount due period";
CharSequence contentTitle = "Tax Toolbox";
long when = System.currentTimeMillis();
intent = new Intent(context, MenuPageActivity.class); // here i am calling activity
intent.putExtra("sixMonth", "sixMonth");
intent.putExtra("messageSixMonth", contentText);
PendingIntent contentIntent = PendingIntent.getActivity(context, 1, intent, PendingIntent.FLAG_UPDATE_CURRENT);
notification = new Notification(icon,text,when);
long[] vibrate = {0,100,200,300};
notification.vibrate = vibrate; // To vibrate the Device
notification.ledARGB = Color.RED;
notification.ledOffMS = 300;
notification.ledOnMS = 300;
notification.defaults |= Notification.DEFAULT_LIGHTS;
//notification.flags |= Notification.FLAG_SHOW_LIGHTS;
notification.setLatestEventInfo(context, contentTitle, contentText, contentIntent);
notificationManager.notify(com.project.TaxToolbox.NotificationConstants.NOTIFICATION_ID_SIX_MONTH, notification);
}
Now, on the onCreate() of that activity you have to identify whether it is call by Notification or not.
As like:
NotificationManager notificationManager = (NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE);
System.out.println("The Extra for twoMonth is: "+getIntent().hasExtra("twoMonth"));
System.out.println("The Extra for sixMonth is: "+getIntent().hasExtra("sixMonth"));
System.out.println("The Extra for EveryMonth is: "+getIntent().hasExtra("everyMonth"));
if(getIntent().hasExtra("sixMonth")){
notificationManager.cancel(NotificationConstants.NOTIFICATION_ID_SIX_MONTH);
final AlertDialog alert3 = new AlertDialog.Builder(MenuPageActivity.this).create();
alert3.setTitle("Tax Toolbox");
alert3.setMessage(getIntent().getExtras().getString("messageSixMonth"));
alert3.setButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
return;
}
});
alert3.setIcon(R.drawable.app_icon);
alert3.show();
// here you can do anything more or close the activity.
}
Not sure but might be helpfull to you.
Feel free to comments if it help you.
Create a common Activity class and extend this common class from all activities, that way you can have a centralized code. Have a register the broadcast receiver in onStart of the activity and unregister in onStop that way only one activity, the one which is visible will be registered for the broadcast intent.
Sample code:
public class BaseActivity extends Activity {
/*
* (non-Javadoc)
*
* #see android.app.Activity#onCreate(android.os.Bundle)
*/
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
registerReceiver(receiver, new IntentFilter(YOUR_INTENT_FILTER));
}
/*
* (non-Javadoc)
*
* #see android.app.Activity#onStop()
*/
protected void onStop(){
unregisterReceiver(receiver);
}
/*
* (non-Javadoc)
*
* #see android.app.Activity#onStart()
*/
protected void onStart(){
super.onStart();
registerReceiver(receiver, new IntentFilter(YOUR_INTENT_FILTER));
}
private BroadcastReceiver receiver = new BroadcastReceiver() {
/*
* (non-Javadoc)
*
* #see
* android.content.BroadcastReceiver#onReceive(android.content.Context,
* android.content.Intent)
*/
#Override
public void onReceive(Context context, Intent intent) {
onBackPressed();//on back pressed simply calls finish()
}
};
} // End of BaseActivity
// End of File
Try using:
Intent i = new Intent(context,intent.getClass());
Follow the instructions from gezdy on How to get current foreground activity context in android? to ensure you can get a reference to the current activity from anywhere in your application.
From there you can call .finish() to close the current activity.
Place finish(); after u completed all the tasks in onReceive() of BroadcastReceiver class as below:
#Override
public void onReceive(Context context, Intent intent) {
// Do all the tasks onReceive of BroadCast Receiver
finish(); // This finishes the current activity here....
}
I want to implement the following scenario:
When a user presses the Home key a Notification is displayed in the Status bar and the App is normally hidden. When user taps the Notification App is normally restored.
Here is my code for this:
private int NOTIFICATION = R.string.local_service_started;
private NotificationManager mNM;
private void showNotification() {
CharSequence text = getText(R.string.local_service_started);
Notification notification = new Notification(R.drawable.icon, text, System.currentTimeMillis());
PendingIntent contentIntent = PendingIntent.getActivity(this, 0, new Intent(this, JingleCartoucheActivity.class), 0);
notification.setLatestEventInfo(this, getText(R.string.local_service_label), text, contentIntent);
mNM.notify(NOTIFICATION, notification);
}
#Override
public void onPause() {
super.onPause();
if (!isFinishing()) {
showNotification();
}
}
#Override
public void onResume() {
super.onResume();
mNM.cancel(NOTIFICATION);
}
All of this is working well except for one thing:
When the App is run and the user rotates the phone, the notification is created and immediately destroyed. Is there a way to detect the phone orientation change in onPause() and not show this Notification?
You can get the current orientation using the getResources().getConfiguration().orientation. At the onCreate you store the orientation value and then you can compare it later. Be sure to store the value into a static variable, since when you rotate the phone, the activity is destroyed and so are it's values.
When the user rotate the screen the activity is destroyed and recreated , If you want to display the notification after orientation change make a static flag in onDestroy method and check it in the onCreate method to display the notification like
public void onDestroy() {
Flag = 1;
}
and
public static int Flag = 0;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if(Flag == 1) {
showNotification();
}
else {
.......//
}
}