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How to open application while clicking notification?

I have implemented media notification and lock screen notification in my music player. While clicking lock screen notification, how to ask the password to the user and how to open the application.
As well as for media notification while clicking I have opened the application. But how to close the notification bar or how to hide the whole notification bar
and how to show the suggestion of my application in "open with " while clicking the music file in any file directory.

What do you mean by ask for password? just open an activity that asks for password.
As for open an activity use Nirali solution in: Open application after clicking on Notification
NotificationManager notificationManager = (NotificationManager) context
.getSystemService(Context.NOTIFICATION_SERVICE);
Notification notification = new Notification(icon, message, when);
Intent notificationIntent = new Intent(context, HomeActivity.class);
notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP
| Intent.FLAG_ACTIVITY_SINGLE_TOP);
PendingIntent intent = PendingIntent.getActivity(context, 0,
notificationIntent, 0);
notification.setLatestEventInfo(context, title, message, intent);
notification.flags |= Notification.FLAG_AUTO_CANCEL;
notificationManager.notify(0, notification);

For "open with" you should define intent-filter in your manifest. Look at this register as music player and https://developer.android.com/guide/components/intents-filters.html

My notification icon/message is cleared when app exits or phone is restarted [duplicate]

This question already has an answer here:
Android: make notification persist across phone reboot
(1 answer)
Closed 10 years ago.
I looked around a lot for an answer but guess i must be missing something obvious...
When a user does a certain operation in my app i wish to display an icon in the bar, aswell as a message in the "messages" dropdown.
This works fine, however, when my app is shut down (through the activity manager), or i restart the phone, all is cleared.
The icon is unavoidable i suppose, but i would like the message to only be cleared when the user clears it, and to be persistent across phone restarts.
Is this possible?
code:
Notification notification = new Notification(icon, message, when);
notification.flags = Notification.FLAG_AUTO_CANCEL;
Context context = getApplicationContext();
CharSequence contentTitle = "Title";
CharSequence contentText = "The Message";
Intent notificationIntent = new Intent(this, MyActivity.class);
PendingIntent contentIntent = PendingIntent.getActivity(this, 0, notificationIntent, 0);
notification.setLatestEventInfo(context, contentTitle, contentText, contentIntent);
getNotificationManager().notify(STATUSBAR_ID, notification);

This SO answer should help you out on this:
"For raising a Notification, you can probably get by with just doing it in the BOOT_COMPLETED_ACTION BroadcastReceiver, rather than delegating it to a service. However, I agree, this is the only way to do it AFAIK."
Android: make notification persist across phone reboot

How do I keep my Android notification displayed until my app is closed?

I've been developing for Android for awhile but this is my first shot at notifications. I've got my notification setup as described in the Android SDK tutorial, but I can't figure out how to keep the notification displayed until my app is closed. I want to disable that little minus sign at the end of the notification. I don't want my notification to disappear when a user clicks it. I would think there would be a notification flag... but I can't seem to figure this out. I'm developing on Android SDK 2.2. I know this is a simple question, and I apologize if this answer is already on here... I wasn't able to find exactly what I was looking for.
// Create notification manager
String ns = Context.NOTIFICATION_SERVICE;
NotificationManager mNotificationManager = (NotificationManager) getSystemService(ns);
Notification notification = new Notification(R.drawable.ic_launcher, "Ready", System.currentTimeMillis());
Intent notificationIntent = new Intent(this, HomeActivity.class);
PendingIntent contentIntent = PendingIntent.getActivity(this, 0, notificationIntent, 0);
// Make a notification
notification.setLatestEventInfo(getApplicationContext(), "Ready", "Select to manage your settings", contentIntent);
mNotificationManager.notify(0, notification);

You want FLAG_ONGOING_EVENT. Also try removing FLAG_NO_CLEAR and FLAG_AUTO_CANCEL if they are part of the defaults.

android notification while the notification icon is clicked

I wrote my notification intent like this(the snippet below). I have Activity A,B and C running. While running C, I pressed the home screen and soon received a notification. I pressed on the notification icon, hoping restart the app from Activity A but unfortunately it doesn't. What this code current do is create a new Activity A on top of the stack.... So I am stuck with the following running activity(or stack):A,B,C,A
So my main question is, how can I clean up the Activity stack so that only Activity A is on the stack when the notification icon is clicked?
Any tips or comments would appreciated.
Intent notificationIntent = new Intent(context,
A.class);
notificationIntent.setAction(Intent.ACTION_MAIN);
notificationIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK
| Intent.FLAG_ACTIVITY_CLEAR_TOP);
PendingIntent contentIntent = PendingIntent.getActivity(context, 0,
notificationIntent, 0);
notification.setLatestEventInfo(appContext, contentTitle,
contentText, contentIntent);
String ns = Context.NOTIFICATION_SERVICE;
NotificationManager mNotificationManager = (NotificationManager) context
.getSystemService(ns);
mNotificationManager.notify(1, notification);

Set launchMode="singleTask" for the activity A in the manifest. In this case activity A will be the only one running after you go back to it from notification.
However when launch mode is singleTask or singleInstance your app is going to behave the same way when you resume your app from the background. It's not going to be possible to resume to activity B or C.

This question may help you either with FLAG_ACTIVITY_CLEAR_TOP or using startActivityForResult.

Android how to show notification on screen

I've been working on push notifications and I am able to implement it and display it on status bar, the problem I am facing is that I want to display it even if the phone is lock, Under the lock screen where it says ("drag to unlock"), I have seen notifications like that but cant find any example to that.
Example:
Just like when you received a missed call , it will show it under the lock button on your screen.
Code:
String ns = Context.NOTIFICATION_SERVICE;
NotificationManager mNotificationManager = (NotificationManager) getSystemService(ns);
int icon = R.drawable.icon_launcher;
CharSequence tickerText = "MyApplication";
long when = System.currentTimeMillis();
Notification notification = new Notification(icon, tickerText, when);
notification.defaults |= Notification.DEFAULT_SOUND|Notification.DEFAULT_VIBRATE|Notification.DEFAULT_LIGHTS;;
CharSequence contentTitle = this.title;
CharSequence contentText = this.message;
Intent notificationIntent = new Intent(this, MainActivity.class);
PendingIntent contentIntent = PendingIntent.getActivity(this, 0, notificationIntent, 0);
notification.setLatestEventInfo(context, contentTitle, contentText, contentIntent);
mNotificationManager.notify(NOTICE_ID, notification);

Create Notification using NotificationCompat.Builder
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(this)
.setSmallIcon(R.drawable.ic_launcher) // notification icon
.setContentTitle("Notification!") // title for notification
.setContentText("Hello word") // message for notification
.setAutoCancel(true); // clear notification after click
Intent intent = new Intent(this, MainActivity.class);
PendingIntent pi = PendingIntent.getActivity(this,0,intent,Intent.FLAG_ACTIVITY_NEW_TASK);
mBuilder.setContentIntent(pi);
NotificationManager mNotificationManager =
(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
mNotificationManager.notify(0, mBuilder.build());
Push Notification on locked Screen
http://www.hongkiat.com/blog/android-lock-screen-notifications/

Create Notification using NotificationCompat.Builder but make sure to put visibility to public like
NotificationCompat.Builder builder = new NotificationCompat.Builder(this);
builder
.setContentTitle("Title")
.setContentText("content")
.setSmallIcon(R.mipmap.ic_launcher)
.setVisibility(NotificationCompat.VISIBILITY_PUBLIC);//to show content in lock screen

Have you tried creating the alertdialog with a flag? The flag_show_when_locked should do the trick.
Please refer to this thread, you should find a more detailed answer here.
Android Lock Screen Widget

I fixed this by adding this line to notification builder
builder.setOngoing(true);
It will also make notification not cancelable by user, but it solves the problem.
Credits to: Marian Klühspies (link)

The notifications you have seen may actually be widgets placed on a custom widget host lockscreen.
If you look at the android platform source code for InstallWidgetReceiver as late as 4.4.3 here:
https://android.googlesource.com/platform/packages/apps/Launcher3/+/master/src/com/android/launcher3/InstallWidgetReceiver.java
You will see this note by the author:
/**
* We will likely flesh this out later, to handle allow external apps to place widgets, but for now,
* we just want to expose the action around for checking elsewhere.
*/
And you can see that InstallWidgetReceiver.java is in fact not fleshed out by google in the same way as InstallShortCutReceiver.java is. So it seems at least up to 4.4.3 you cant add widgets to the native lock screen in the same way that you can for example add a shortcut to the homescreen using InstallShortCutReceiver.
Unless you build your own lockscreen app as a widget host and the user installs in lieu of the native you may be out of luck using a widget.
Another approach however is to just us an activity that sets getWindow().addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED);
This will display your activity whether the screen is locked or not. Dismissing this activity when the screen is locked will display the locked screen.