bottom navigationbar에서 버튼을 누르면 그때마다 그 fragment가 작동이 되는데요
app을 실행하면 처음에는 하단부 1번 버튼이 선택은 되어잇으나
fragment를 거치지 않아서 fragment가 동작하지 않습니다.
하단 버튼을 클릭했을 경우 실행되는데요
처음 앱 실행시 1번 버튼이 자동으로 실행되게 하는 방법이 없나요??
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.design.widget.BottomNavigationView;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.AppCompatActivity;
import android.view.MenuItem;
public class MainActivity extends AppCompatActivity {
private BottomNavigationView bottomNavigationView;
private Fragment fragment;
private FragmentManager fragmentManager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
fragmentManager = getSupportFragmentManager();
//Bottom Buttom
bottomNavigationView = (BottomNavigationView) findViewById(R.id.bottom_navigation);
bottomNavigationView.setOnNavigationItemSelectedListener(
new BottomNavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
switch (item.getItemId()) {
case R.id.action_recipe:
fragment = new RecipeFragment();
break;
case R.id.action_parts:
fragment = new PartsFragment();
break;
case R.id.action_remote:
fragment = new RemoteFragment();
break;
case R.id.action_unfreeze:
fragment = new UnfreezeFragment();
break;
case R.id.action_bluetooth:
fragment = new BluetoothFragment();
break;
}
final FragmentTransaction transaction = fragmentManager.beginTransaction();
transaction.replace(R.id.main_container, fragment).commit();
return true;
}
}
);
}
}