Running my app in background

Question

I want to check, my program is in background or not! my prgram have one package(all of my classes is in one package). I searched and finally i found this way. i write this code but when my program is in background, my code not run. why?

public class BackgroundCheck extends AsyncTask<Context,Void,Boolean>{

    @Override
    protected Boolean doInBackground(Context... arg0) {
        // TODO Auto-generated method stub
        Context context=arg0[0];
        return isAppInBackground(context);
    }

    private boolean isAppInBackground(Context context){
        ActivityManager activityManager=(ActivityManager)context.getSystemService(context.ACTIVITY_SERVICE);
        List<RunningAppProcessInfo> appProcess=activityManager.getRunningAppProcesses();
        if (appProcess==null)
            return false;
        final String packageName=context.getPackageName();

        Log.e("packageName", packageName);
        //Toast.makeText(context, "packageName="+packageName,Toast.LENGTH_LONG).show();

        for(RunningAppProcessInfo processInfo:appProcess){
            if((processInfo.importance==RunningAppProcessInfo.IMPORTANCE_BACKGROUND)&&( processInfo.processName.equals(packageName))){
                Log.e("process", "in background");
                Toast.makeText(context, "process in background", Toast.LENGTH_LONG).show();
                Log.e("packagenmae", processInfo.processName);
                return true;
            }
        }
        return false;
    }

}

and i add this code in this class but when my program in background, else if was run ! like always my program is in foreground ! what is problem??

if((processInfo.importance==RunningAppProcessInfo.IMPORTANCE_BACKGROUND)&&( processInfo.processName.equals(packageName))){
    Log.e("process", "in background");
    Toast.makeText(context, "process in background", Toast.LENGTH_LONG).show();
    Log.e("packagenmae", processInfo.processName);
    return true;
}
else if((processInfo.importance==RunningAppProcessInfo.IMPORTANCE_FORGROUND)&&( processInfo.processName.equals(packageName))){
    Log.e("process","in forground");
    return true;
}

Can i use another way that run in api 7+? That way should be reliable... Thanks for advise

Answer 1

If you want to know that your app is in background or not then you have to use Service for that

you should go with this:

http://www.vogella.com/articles/AndroidServices/article.html

Answer 2

Only one activity can run at a time. All others are suspended when another activity becomes active.

If you want code to run reliably in the background you would need to use a service.