How to Call Activity to Fragment in Android

 Activity to Fragment  Call in Android

            EmployeeFragment fragment = new EmployeeFragment();
            FragmentManager manager = getSupportFragmentManager();
            FragmentTransaction transaction = manager.beginTransaction();
            transaction.add(R.id.emp_container,fragment ,"Employee Fragment");
            transaction.commit();

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How to call fragment to activity in Android

Fragment to Activity call

Intent intent = new Intent(getContext(), HomeActivity.class);
                getActivity().startActivity(intent);

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How to call one Fragment to another Fragment in Android

 Fragment to Fragment call

FragmentTransaction transaction = getFragmentManager().beginTransaction();
                transaction.replace(R.id.root_frame, new ProductFragment());
                transaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN);
                transaction.addToBackStack(null);
                transaction.commit();

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How to show Toast message in Android

This is how you can show an Android Toast message from a Fragment

Toast.makeText(getActivity(), "Click!", Toast.LENGTH_SHORT).show();


This is how you can show an Android Toast message from a Activity

 Toast.makeText(getApplicationContext(),"This is an Android Toast Message", Toast.LENGTH_LONG).show();

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How to call one Activity to another Activity in Android

How to call one Activity to another Activity in Android

Intent intent = new Intent(getApplicationContext(), HomeActivity.class);
                    startActivity(intent);

OR

Intent intent = new Intent(this, HomeActivity.class);
                    startActivity(intent);

OR

Intent intent = new Intent(LoginActivity.this,HomeActivity.class);
                    startActivity(intent);

OR

  startActivity(new Intent(getApplicationContext(), HomeActivity.class));

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How would you find the length of each string in the program .

How would you find the length of each string in the program?

void main()

{

  char *str[] = {“Frogs”, “Do”, “Not”, “They”, “Croak!”};

  int i;

       for(i=0; i<=4; i++)

          printf(“\n %s  %d”, str[i], strlen(str[i]));

}

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Can you write the code in strcpy() into single line

1.     Can you compact the code in strcpy() into one line?

  

Ans:

 mystrcpy( char *t, char *s)

 {

   while (*t++ = *s++);

 }

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