Я построил нижнюю панель вкладок навигации в Android, у нее есть 5 фрагментов, но проблема в том, что при запуске приложения не загружается список повторного просмотра из базы данных Firestore.и этот фрагмент является домашним фрагментом.но если я случайным образом открою другую вкладку и затем перейду на домашнюю вкладку, список домашних вкладок загружается сам, но он не загружается автоматически при запуске приложения.
- это код ниже.пожалуйста, помогите
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
private static final String TAG = "DocSnippets";
private FirebaseAuth mauth;
private FirebaseFirestore db = FirebaseFirestore.getInstance();
private CollectionReference UsersRef = db.collection("Users");
private DocumentReference noteRef = db.document("Notebook/My First Note");
private MySharedPreferences sp;
private DocumentReference currentUserRef;
private Button notificationList;
private String mUserId, tokenId, currentUserProfilePic, currentUserName, currentUserSpinnerC;
String currentUserID;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
sp = MySharedPreferences.getInstance(this);
setContentView(R.layout.activity_main);
mauth = FirebaseAuth.getInstance();
// currentUserID = mauth.getCurrentUser().getUid();
UsersRef =FirebaseFirestore.getInstance().collection("Users");
mUserId = mauth.getUid();
tokenId = FirebaseInstanceId.getInstance().getToken();
Toolbar toolbar = findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
DrawerLayout drawer = findViewById(R.id.drawer_layout);
NavigationView navigationView = findViewById(R.id.nav_view);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.addDrawerListener(toggle);
toggle.syncState();
navigationView.setNavigationItemSelectedListener(this);
BottomNavigationView navigation = (BottomNavigationView) findViewById(R.id.bottom_nav_view);
navigation.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener);
}
private BottomNavigationView.OnNavigationItemSelectedListener mOnNavigationItemSelectedListener
= new BottomNavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
Fragment fragment;
fragment = null;
switch (item.getItemId()) {
case R.id.navigation_home:
fragment = new HomeFragment();
break;
case R.id.navigation_dashboard:
fragment = new DashboardFragment();
break;
case R.id.navigation_notifications:
// Intent intent = new Intent(MainActivity.this, AddPostActivity.class);
// startActivity(intent);
fragment = new NotificationsFragment();
break;
case R.id.navigation_post:
fragment = new ProfileFragment();
break;
case R.id.navigation_postlist:
fragment = new ProfileFragment();
break;
}
return loadFragment(fragment);
}
};
private boolean loadFragment(Fragment fragment) {
//switching fragment
if (fragment != null) {
getSupportFragmentManager()
.beginTransaction()
.replace(R.id.fragment_container, fragment)
.commit();
return true;
}
return false;
}
@Override
protected void onStart()
{
super.onStart();
FirebaseUser currentUser = mauth.getCurrentUser();
if(currentUser == null)
{
SendUserToSignInActivity();
}
else
{
retrieveCurrentUserInfo();
checkUserExistence();
}
}
private void checkUserExistence() {
final String current_user_id = mauth.getCurrentUser().getUid();
}
private void SendUserToSignInActivity() {
Intent signInIntent = new Intent(MainActivity.this, SignInActivity.class);
signInIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK |Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(signInIntent);
finish();
}
@Override
public void onBackPressed() {
DrawerLayout drawer = findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
private void retrieveCurrentUserInfo(){
currentUserRef = db.collection("users").document(mUserId);
currentUserRef.get().addOnCompleteListener(new OnCompleteListener<DocumentSnapshot>() {
@Override
public void onComplete(@NonNull Task<DocumentSnapshot> task) {
if (task.isSuccessful()) {
DocumentSnapshot document = task.getResult();
if (document.exists()){
currentUserName = (String) document.getString("username");
currentUserProfilePic =(String) document.getString("profile_pic");
currentUserSpinnerC = (String) document.getString("spinnerC");
CircleImageView UserImage = (CircleImageView) findViewById(R.id.current_user_Image);
Picasso.get()
.load(currentUserProfilePic)
.resize(50, 50)
.centerCrop()
.into(UserImage);
TextView username = (TextView) findViewById(R.id.current_user_name);
TextView spinnerC = (TextView) findViewById(R.id.current_user_spinnerC);
username.setText(currentUserName);
spinnerC.setText(currentUserSpinnerC);
}
}
}
});
}
}