Question

Why is the code executing when all the 3 textfields still contain “Enter Date”, “Start Time” and “End Time”?

CharSequence x = startDateDisplay.getText();
CharSequence y = startTimeDisplay.getText();
CharSequence z = endTimeDisplay.getText();

Log.d(TAG, "validate on save: "+ x + " " + y + " " + z );

if(startDateDisplay.getText() != "Enter Date" && 
    startTimeDisplay.getText() != "Start Time" && 
    endTimeDisplay.getText() != "End Time" ) 
{
    //excecute code    
}
else
{
   Toast.makeText(this, "Please fill in all fields", Toast.LENGTH_SHORT).show();
}

Answer 1

For String comparison, use String.equals() method:

if(!StartDateDisplay.getText().toString().equals("Enter Date") &&
!StartTimeDisplay.getText().toString().equals("Start Time") &&
!endTimeDisplay.getText().toString().equals("End Time"))