How to launch an app from another app

Question

in my app i have to launch another app, only if it is not yet launched.

To launch an app what i do is:

PackageManager pm = getPackageManager();        
Intent intent = pm.getLaunchIntentForPackage("package.of.app.to.launch");
startActivity(intent);

My problem is that if app is already launched, it will bring the app to the front. How can i launch app only if is not present in active and launched apps? thanks!

Answer 1

You can get a list of all running or active apps and then check if the App you want to start is in it.

ActivityManager activityManager = (ActivityManager)getSystemService(Context.ACTIVITY_SERVICE);
List<RunningAppProcessInfo> runningProcInfo = activityManager.getRunningAppProcesses();
for(int i = 0; i < runningProcInfo.size(); i++){
        if(runningProcInfo.get(i).processName.equals("package.of.app.to.launch")) {
            Log.i(TAG, "XXXX is running");
        } else  {
            // RUN THE CODE TO START THE ACTIVITY
        }
}

Answer 2

You can use ActivityManager to get Currently running Applications and to get recent task executed on Device as:

 ActivityManager activityManager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
 List<RunningTaskInfo> recentTasks = activityManager.getRunningTasks(Integer.MAX_VALUE);

    for (int i = 0; i < recentTasks.size(); i++) 
    {
         // Here you can put your logic for executing new task         
    }

Answer 3

If you want to know whether an app is running or not, you should have a look at getRunningTasks

Also this post might help you.

Answer 4

you can get that which activity is running

List< ActivityManager.RunningTaskInfo > taskInfo = am.getRunningTasks(1); 
String currentActivity=taskInfo.get(0).topActivity.getPackageName();

then check

if(currentActivity!=(your activity))
{
    **your intent**
}
else{
"app already running"
}

hope it helps. thank you