Notification restart my activity and pause button on notification

Question

My notification get restart when i click on it by Status bar when i start my app it stream audio from server and show a notification until i don't clear it from status bar so my problem is when i click on my app notification it restart the activity and stop the streaming music.. so please suggests me solution for to stop restarting app again from notification and i want to show notification which stick on notification bar upto i exit from app Also I want to Show pause and Play button on Notification so please help me that too

public void onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState); 

        setContentView(R.layout.activity_main);

        nm=(NotificationManager)getSystemService(NOTIFICATION_SERVICE);

        Intent intent = new Intent(this,MainActivity.class);
        PendingIntent pi= PendingIntent.getActivity(this, 0, in`enter code here`tent, 0);
         String body = " Welcome to streaming ";
         String title = "radio";
         Notification n = new Notification(R.drawable.png, body, System.currentTimeMillis());
         n.setLatestEventInfo(this , title, body, pi);
         n.defaults=Notification.DEFAULT_ALL;
         nm.notify(uniid,n);`

Answer 1

Add this in to your manifest file inside the activity which you are starting through notification, as if it is already running it won't be restarted again ..

android:launchMode="singleTop"
android:configChanges="orientation|keyboardHidden" // fixes orientation

Don't allow to destroy your application on back press :

    @Override
public void onBackPressed()
{
    moveTaskToBack(true);
    //super.onBackPressed();   // comment this line else your app will be destroyed

}