Remember the previous method from which next method get called

Question

In android I've to achieve following:

If entered password is correct in funToEnterPassword();. How could I know here from which method I called this method so I can continue with functionABC(); or functionXYZ();

public void fun1(){
 funToEnterPassword();
 funcABC();
}


public void fun1(){
 funToEnterPassword();
 functionXYZ();
}


public void funToEnterPassword(){
 //Enter password in popup
 //If password is correct how could I know here from which method I got called this method so I can continue with functionABC() or functionXYZ();
}

If you are calling funToEnterPassword(); in fun1(), then funcABC(); will automatically be called. You dont have to write call for that in funToEnterPassword() — MysticMagicϡ, Dec 27 '12 at 06:50
u can use static variable , boolean variable or can show a toast — Usman Kurd, Dec 27 '12 at 06:50
@ShreyaShah, FuncABC() should be called only when entered password is correct and it might be declared out of this function. — Quicklaunch Technology, Dec 27 '12 at 06:53
You can use printStackTrace method to find out the calling method! StackTraceElement[] stackTraceElements=Thread.currentThread().getStackTrace() refer: (http://stackoverflow.com/questions/421280/in-java-how-do-i-find-the-caller-of-a-method-using-stacktrace-or-reflection) — stack_ved, Dec 27 '12 at 06:59

score 2 · Answer 1 · answered Dec 27 '12 at 06:48

2

You can use boolean for that either declare method type as boolean or a variable and sets its value as you needed. Simple. :)

answered Dec 27 '12 at 06:48

Rohit

490
3
15

There might be any number of callers so how could I remember last one from say 100 callers? – Quicklaunch Technology Dec 27 '12 at 06:50
callers are from same app or from different? – Rohit Dec 27 '12 at 06:54
Callers are from same app. – Quicklaunch Technology Dec 27 '12 at 06:55
I think Shreya Shah has coded as i suggested. Apply it if it is helping. +1 for Shreya – Rohit Dec 27 '12 at 07:00

score 1 · Answer 2 · answered Dec 27 '12 at 06:57

Try following method:

public void fun1(){
   boolean result = funToEnterPassword();
   if (result) 
      funcABC();
}

public void fun2(){
   boolean result = funToEnterPassword();
   if (result)
      functionXYZ();
}


public boolean funToEnterPassword(){

   pwdResult = false;
   //Enter password in popup
   //If correct pwd
   pwdResult = true;
   //If password is correct how could I know here from which method I got called this             method so I can continue with functionABC() or functionXYZ();

   return pwdResult;
}

score 0 · Accepted Answer · answered Dec 27 '12 at 09:40

Usually the third item in the array should hold the current class and method values! this below code could be of some use!

StackTraceElement[] stackTraceElements = Thread.currentThread().getStackTrace();
    if(stackTraceElements != null && stackTraceElements.length > 0){
        if(stackTraceElements.length > 2){
            String methodName = stackTraceElements[2].getMethodName();
            String className = stackTraceElements[2].getClassName();
            Log.e(className, methodName);
            Toast.makeText(this, className + " " + methodName, Toast.LENGTH_LONG).show();
        }

    }

Remember the previous method from which next method get called

3 Answers3