How to check if the activity is open

Question

I would like to somehow check if the activity is open. I have got activity1.java and activity2.java. If the user will open activity 1, textview will be green else textview will be blue(I know how to change background dynamically). I want to do it this way!

If (activity1 is open) {
    tv.setBackgroundColor(COLOR.GREEN);
} else if(activity2 is open) {
    tv.setBackgroundColor(COLOR.BLUE);
}

possible duplicate of [Android: how do I check if activity is running?](http://stackoverflow.com/questions/5446565/android-how-do-i-check-if-activity-is-running) — Bosko Mijin, Apr 09 '14 at 12:59
Here is the solution: http://stackoverflow.com/questions/5446565/android-how-do-i-check-if-activity-is-running. You can have static members or try to get from Activity.class compared with getCanonicalName() value. All is displayed here in several examples. — Bosko Mijin, Apr 09 '14 at 13:02

score 0 · Answer 1 · answered Apr 09 '14 at 12:56

0

You should keep a global variable in your Activity, for example boolean isVisible. Then in your onResume() you set

isVisible = true

and in the onPause() method

isVisible = false

answered Apr 09 '14 at 12:56

Alessandro Roaro

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score 0 · Accepted Answer · answered Apr 09 '14 at 13:00

just make a string variable in any activity lets say i make it on activity3 like

public static String activity_name=null;

on activity1 put a value like

activity3.activity_name = first;

on activity2 put a value like

activity3.activity_name = second;

now just check

if (activity3.activity_name.equals("first") && !activity3.activity_name.equals(null))
{
    tv.setBackgroundColor(COLOR.GREEN);
}
    else if(activity3.activity_name.equals("second") && !activity3.activity_name.equals(null))
{
    tv.setBackgroundColor(COLOR.BLUE);
}

How to check if the activity is open

2 Answers2