Develop Reference

how to call single fragment from the second navigation drawer activity

I have a main navigation drawer using which I call signin fragment. Also there are other fragment which I can easily call. But when I log in, a second navigation drawer opens up and I am not able to call same fragments which I can easily call while using main navigation drawer.
This is my mainactivity where the navigation drawer being called
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
private View.OnClickListener mOnClickListener;
SessionManager session;
private NavigationView navigationView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
session = new SessionManager(getApplicationContext());
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();
navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
Fragment homeFragment;
if(!session.isLoggedIn()){
homeFragment = new SigninFragment();
getSupportFragmentManager().beginTransaction().replace(R.id.content_main, homeFragment, String.valueOf(homeFragment.getClass())).addToBackStack(null).commit();
getSupportActionBar().setTitle(getResources().getString(R.string.signin_title));
}
}
#Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) 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;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
#SuppressWarnings("StatementWithEmptyBody")
#Override
public boolean onNavigationItemSelected(MenuItem item) {
Fragment fr;
FragmentManager supportFragmentManager = getSupportFragmentManager();
ActionBar supportActionBar = getSupportActionBar();
supportActionBar.setTitle("productAga");
int id = item.getItemId();
switch (id){
case R.id.home_nv:
fr = new HomeFragment();
supportFragmentManager.beginTransaction().replace(R.id.content_main, fr, String.valueOf(fr.getClass())).addToBackStack(null).commit();
supportActionBar.setTitle(getResources().getString(R.string.home_title));
break;
case R.id.signup_nv:
fr = new SignupFragment();
supportFragmentManager.beginTransaction().replace(R.id.content_main, fr, String.valueOf(fr.getClass())).addToBackStack(null).commit();
supportActionBar.setTitle(getResources().getString(R.string.signup_title));
/*Intent it = new Intent(getApplicationContext(), SignupActivity.class);
startActivity(it);*/
break;
case R.id.signin_nv:
fr = new SigninFragment();
supportFragmentManager.beginTransaction().replace(R.id.content_main, fr, String.valueOf(fr.getClass())).addToBackStack(null).commit();
supportActionBar.setTitle(getResources().getString(R.string.signin_title));
break;
case R.id.about_nv:
fr = new AboutusFragment();
supportFragmentManager.beginTransaction().replace(R.id.content_main, fr, String.valueOf(fr.getClass())).addToBackStack(null).commit();
supportActionBar.setTitle(getResources().getString(R.string.about_title));
break;
case R.id.logout_nv:
session.logoutUser();
Intent it = new Intent(getApplicationContext(), MainActivity.class);
startActivity(it);
break;
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
}
Now when I logged in I am using this code and notice there is the same aboutus fragment
public class LoggedinMainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
SessionManager session;
private String gname;
private String gemail;
private static final String TAG = "TAG_LOG_IN" ;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_loggedin_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
session = new SessionManager(getApplicationContext());
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawerlg_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_login_view);
navigationView.setNavigationItemSelectedListener(this);
/*Fragment homeFragment;
if(session.isLoggedIn()){
homeFragment = new DashboardFragment();
getSupportFragmentManager().beginTransaction().replace(R.id.content_main, homeFragment, String.valueOf(homeFragment.getClass())).addToBackStack(null).commit();
getSupportActionBar().setTitle(getResources().getString(R.string.signin_title));
}*/
session.checkLogin();
HashMap<String, String> user = session.getUserDetails();
gname = user.get(SessionManager.KEY_NAME);
gemail = user.get(SessionManager.KEY_EMAIL);
}
#Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) 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.loggedin_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
#SuppressWarnings("StatementWithEmptyBody")
#Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
Fragment fr;
FragmentManager supportFragmentManager = getSupportFragmentManager();
ActionBar supportActionBar = getSupportActionBar();
supportActionBar.setTitle("productAga");
int id = item.getItemId();
switch (id){
case R.id.homelg_nv:
fr = new HomeFragment();
supportFragmentManager.beginTransaction().replace(R.id.content_main, fr, String.valueOf(fr.getClass())).addToBackStack(null).commit();
supportActionBar.setTitle(getResources().getString(R.string.home_title));
break;
case R.id.aboutlg_nv:
Log.d(TAG +"_ABOUT", ": about");
fr = new AboutusFragment();
supportFragmentManager.beginTransaction().replace(R.id.content_main, fr, String.valueOf(fr.getClass())).addToBackStack(null).commit();
supportActionBar.setTitle(getResources().getString(R.string.about_title));
break;
case R.id.logout_nv:
session.logoutUser();
Intent it = new Intent(getApplicationContext(), MainActivity.class);
startActivity(it);
break;
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawerlg_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
}
I am also using session management using sharedpreference in order to log in
Also, I got on the android monitor following error when I click on about us
java.lang.IllegalArgumentException: No view found for id 0x7f0d008a (com.roomi.productagaapplication:id/content_main) for fragment AboutusFragment{35e39e5d #0 id=0x7f0d008a}

DrawerToggle may not show up because NavigationIcon is not visible

ERROR:
DrawerToggle may not show up because NavigationIcon is not visible.
You may need to call actionbar.setDisplayHomeAsUpEnabled(true);
public class Homepage extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener {
int storeid;
String storename;
private RecyclerView recyclerView;
ProductAdapter adapter;
private RecyclerView.LayoutManager layoutManager;
ArrayList<ProductClass> Products = new ArrayList<>();
Database database;
public DrawerLayout mDrawerLayout;
public ActionBarDrawerToggle mDrawerToggle;
ActionBar actionBar;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.homepage);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar1);
setSupportActionBar(toolbar);
database = new Database();
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
mDrawerToggle = new ActionBarDrawerToggle(
this, mDrawerLayout,toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
assert mDrawerLayout != null;
mDrawerLayout.addDrawerListener(mDrawerToggle);
mDrawerToggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(Homepage.this);
load();
View hView = navigationView.getHeaderView(0);
TextView nav_name = (TextView)hView.findViewById(R.id.textView);
nav_name.setText(storename);
Products = database.getstoreproducts(storeid);
if (Products == null)
Toast.makeText(Homepage.this, "Store is empty", Toast.LENGTH_LONG).show();
else {
recyclerView = (RecyclerView) findViewById(R.id.my_recycler_view);
recyclerView.setHasFixedSize(true);
layoutManager = new LinearLayoutManager(this);
recyclerView.setLayoutManager(layoutManager);
adapter = new ProductAdapter(Products, Homepage.this);
recyclerView.setAdapter(adapter);
}
}
#Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
// Sync the toggle state after onRestoreInstanceState has occurred.
mDrawerToggle.syncState();
}
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
mDrawerToggle.onConfigurationChanged(newConfig);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater m = getMenuInflater();
return true;
}
public void load() {
SharedPreferences sharedPreferences = getSharedPreferences("MyStore", Context.MODE_PRIVATE);
storename = sharedPreferences.getString("storename", "Default");
storeid = sharedPreferences.getInt("storeid", -1);
}
#Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
#SuppressWarnings("StatementWithEmptyBody")
#Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.nav_home) {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
}
// Handle the camera action
} else if (id == R.id.nav_add) {
Intent intent = new Intent(Homepage.this, addnewproduct.class);
startActivity(intent);
}
else if (id == R.id.nav_user) {
Intent intent = new Intent(Homepage.this, storeinfo.class);
startActivity(intent);
}
else if (id == R.id.nav_logout) {
SharedPreferences sharedPreferences = getSharedPreferences("MyStore", Context.MODE_PRIVATE);
SharedPreferences.Editor editor=sharedPreferences.edit();
editor.putString("logged", "unsuccessful");
editor.commit();
Intent intent = new Intent(Homepage.this, MainActivity.class);
startActivity(intent);
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
}
T tried everything i found but couldn't find any solution. please help.

You need to add the below lines for custom Navigation Icon,
getSupportActionBar().setDisplayHomeAsUpEnabled(false);
getSupportActionBar().setHomeAsUpIndicator(R.drawable.logo);

add the following lines after initializing actionbar in OnCreate()
actionbar.setDisplayHomeAsUpEnabled(true);
If it doesn't work, try this:
actionBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM | ActionBar.DISPLAY_SHOW_HOME | ActionBar.DISPLAY_HOME_AS_UP);

Android DrawerLayout does not close untill fragment is replaced

I got a problem that DrawerLayout does not close smoothly and it stops in the middle for a while, it totally closes after finish replacing fragment. In coding I close DrawerLayout before replacing fragment (productList class). In productList class, it calls asynctask to get all the product list from server meanwhile running progress bar. Ideally when user clicks menu, DrawerLayout will close at once and productList fragment will be loading all the product list. It seems to me DrawerLayout close event waits for productList's asynctask. Any suggestion greatly appreciated.
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener, View.OnClickListener {
public String tag = "MainActivity";
Context mContext;
//User Object
User user;
//Control
TextView txtName, txtPosition, txtLogout;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mContext = this;
user = Constants.getUser();
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.addDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
//NavigationView Header
View headerView = navigationView.getHeaderView(0);
txtName = (TextView) headerView.findViewById(R.id.nav_header_main_name) ;
txtName.setText(user.getName().toString());
txtLogout = (TextView) headerView.findViewById(R.id.nav_header_main_logout);
txtLogout.setOnClickListener(this);
navigationView.setNavigationItemSelectedListener(this);
//Add Menu in navigationView
Menu myMenu = navigationView.getMenu();
myMenu.clear();
myMenu.add(0,Integer.parseInt("01"),0,"Product List");
}
#Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) 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;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
#SuppressWarnings("StatementWithEmptyBody")
#Override
public boolean onNavigationItemSelected(MenuItem item) {
//close drawer
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
// replace fragment
int id = item.getItemId();
FragmentManager fragmentManager = getSupportFragmentManager();
if(Constants.DEBUG) {
Toast.makeText(mContext, " Menu Id " + String.valueOf(id), Toast.LENGTH_LONG).show();
}
fragmentManager.beginTransaction()
.replace(R.id.container,new productList())
.commit();
return true;
}
#Override
public void onClick(View v) {
//Log out onclick
if(v.getId() == R.id.nav_header_main_logout){
this.finish();
}
}
}

This probably happens beacuse the Navigation Drawer's animation and the creation of the Fragment happens at the same time.
You can solve it by starting your Fragment with a small delay-
handler.postDelayed(new Runnable() {
#Override
public void run() {
// replace fragment
int id = item.getItemId();
FragmentManager fragmentManager = getSupportFragmentManager();
if(Constants.DEBUG) {
Toast.makeText(mContext, " Menu Id " + String.valueOf(id), Toast.LENGTH_LONG).show();
}
fragmentManager.beginTransaction()
.replace(R.id.container,new productList())
.commit();
}
}, 300);

Implementing back navigation with ToolBar and AppCompatActivity

I'm trying to change the Navigation drawer icon back arrow and use it as a back button. But when I getSupportActionBar().setDisplayHomeAsUpEnabled(true); nothing happens.
MainActivity.java
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
ActionBarDrawerToggle toggle;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) 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 = (DrawerLayout) findViewById(R.id.drawer_layout);
toggle = new ActionBarDrawerToggle(
this, drawer, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
getSupportActionBar().setDisplayShowHomeEnabled(true);
}
#Override
public void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
//getSupportActionBar().setDisplayShowHomeEnabled(true);
toggle.syncState();
}
#Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) 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;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
if(toggle.onOptionsItemSelected(item)) {
return true;
}
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
#SuppressWarnings("StatementWithEmptyBody")
#Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.nav_camera) {
// Handle the camera action
} else if (id == R.id.nav_gallery) {
} else if (id == R.id.nav_slideshow) {
} else if (id == R.id.nav_manage) {
} else if (id == R.id.nav_share) {
} else if (id == R.id.nav_send) {
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
}
When I change the constructor of the ActionBarDrawerToggle to
toggle = new ActionBarDrawerToggle(this, drawer, **toolbar**, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
the icon does change to back arrow, but it functions like a drawer toggle and not like a back button (because the onOptionsItemSelected is not called).
What is the correct way to make it work?

try this,
toggle.setDrawerIndicatorEnabled(false);
Happy Coding..

How to change selected Item in the navigation drawer depending on the activity/view?

I have a Navigation Drawer Activity and different activities in which I get. I want the Items in the nav drawer being selected depending on the activity or view whatever.
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent intent = new Intent(view.getContext(), MainAddMedActivity.class);
/*EditText editText = (EditText) findViewById(R.id.search_medicament);
String medicament_search = editText.getText().toString();*/
/*intent.putExtra(EXTRA_MESSAGE, medicament_search);*/
startActivity(intent);
}
});
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
navigationView.getMenu().getItem(0).setChecked(true);
}
#Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
/*navigationView.getMenu().getItem(0).setChecked(true);*/
}
#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;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
#SuppressWarnings("StatementWithEmptyBody")
#Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.nav_healthdiary) {
} else if (id == R.id.nav_appointment) {
} else if (id == R.id.nav_physician) {
} else if (id == R.id.nav_protocol) {
} else if (id == R.id.nav_share) {
} else if (id == R.id.nav_send) {
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
For example, I get into the MainAddMedActivity and Press back. Then I want some code to check in which view or activity I am and select the item in the navigation drawer.

Seems like you have not yet implemented the switching of the content area. I suggest you use fragments for this.
So, if you use fragments, override onAttachFragment of your activity like:
#Override
public void onAttachFragment(Fragment fragment) {
super.onAttachFragment(fragment);
int id;
if(fragment instanceof HealthDiaryFragment) id = R.id.nav_healthdiary;
else
if(fragment instanceof AppointmentFragment) id = R.id.nav_appointment;
...
else return;
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setCheckedItem(id);
}
Also, modify your onBackPressed:
#Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
if(getFragmentManager().getBackStackEntryCount()>1) {
getFragmentManager().popBackStack();
}
else {
super.onBackPressed();
}
}
/*navigationView.getMenu().getItem(0).setChecked(true);*/
}
This is assuming that in your handling of drawer selection you replace fragments with pushing them on the back stack.