我正在使用 java 在 android studio 中制作应用程序。该应用程序由一个导航抽屉和一个底部导航组成，目前我正在使用 2 个包含我想要显示的元素的片段。在选项卡之间切换以及在导航抽屉中选择另一个选项时，两个片段的元素会重叠。
public class MainActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener {
DrawerLayout drawerLayout;
ActionBarDrawerToggle actionBarDrawerToggle;
Toolbar toolbar;
NavigationView navigationView;
//variables para cargar el fragment
FragmentManager fragmentManager;
FragmentTransaction fragmentTransaction;
String personName;
ViewPager2 viewPager2;
BottomNavigationView bottomNavigationView;
ViewPagerAdapter adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
toolbar=findViewById(R.id.toolbar);
setSupportActionBar(toolbar);//se pasa el toolbar
drawerLayout=findViewById(R.id.drawer);
navigationView=findViewById(R.id.navigationView);
navigationView.setNavigationItemSelectedListener(this);
actionBarDrawerToggle=new ActionBarDrawerToggle(this,drawerLayout,toolbar,R.string.open,R.string.close);
drawerLayout.addDrawerListener(actionBarDrawerToggle);
actionBarDrawerToggle.setDrawerIndicatorEnabled(true);
actionBarDrawerToggle.syncState();
//cargar fragment principal
FragmentManager fragmentManager;
FragmentTransaction fragmentTransaction;
/* fragmentManager=getSupportFragmentManager();
fragmentTransaction=fragmentManager.beginTransaction();
fragmentTransaction.add(R.id.container, new perfil_user());
fragmentTransaction.commit();*/
initView();
}
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
if (item.getItemId() == R.id.user){
FragmentManager fragmentManager;
FragmentTransaction fragmentTransaction;
fragmentManager=getSupportFragmentManager();
fragmentTransaction=fragmentManager.beginTransaction();
fragmentTransaction.replace(R.id.container, new perfil_user());
fragmentTransaction.commit();
}
else if (item.getItemId() == R.id.exit){
finish();
}
//aquí van las otros fragment
drawerLayout.closeDrawer(GravityCompat.START);
return false;
}
private void initView() {
viewPager2 = findViewById(R.id.vp_horizontal_ntb);
viewPager2.setOffscreenPageLimit(100);
bottomNavigationView = findViewById(R.id.navigation);
adapter = new ViewPagerAdapter(this);
viewPager2.setAdapter(adapter);
bottomNavigationView.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
Fragment fragment=null;
switch (item.getItemId()){
case R.id.perfil:
fragment=new perfil_user();
break;
case R.id.generar_debate:
fragment=new genera_debate();
break;
}
getSupportFragmentManager().beginTransaction().replace(R.id.container,fragment).commit();
return true;
}
});
}
}