First I want to change the state of toggle button from false to true, then if its true I want to disable toggle button so no one can change it again.Please help me as I am new to android.
You may do like this,
//get the button as
ToggleButton tb = (ToggleButton) findViewById(R.id.togglebutton1);
// check it is enabled
if(tb.isChecked()){
//do something on enabling it
tb.setEnabled(false); // disable it
}