u get navigation header view by navigationView.getHeaderView(0) just try below code it works!
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NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view); navigationView.setNavigationItemSelectedListener(this); View header=navigationView.getHeaderView(0); /*View view=navigationView.inflateHeaderView(R.layout.nav_header_main);*/ name = (TextView)header.findViewById(R.id.username); email = (TextView)header.findViewById(R.id.email); name.setText(personName); email.setText(personEmail); |