In your PHP
code,
if($result === false ) {
echo "-1";
} else {
echo "1";
}
In processFinish
method,
@Override
public void processFinish(String s) {
if (s.equals("1")) {
Toast.makeText(RegisterActivity.this, "Registered", Toast.LENGTH_SHORT).show();
Intent in = new Intent(RegisterActivity.this, loginFragment.class);
startActivity(in);
finish();
} else if (s.equals("-1")) {
Toast.makeText(RegisterActivity.this, "Your error message", Toast.LENGTH_SHORT).show();
}
}