Styjun

What I have achieved- Fetching username from Facebook and displaying in different activity(working good).
What I'm working on and couldn't get it to work- I'm working on Navigation drawer activity exactly like the below one and this activity(more or less) is provided by android studio itself

I hope you can notice there is a username of this random guy in this above pic,this guy has hard-coded his name in text-view which I don't want to do, instead I want to fetch it from Facebook after login.I can successfully do the second part(fetching the name from Facebook) I just don't no how to assign let me know if there is any possible way to do it.the below is the nav_header.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="match_parent"
 android:layout_height="@dimen/nav_header_height"
 android:background="@drawable/side_nav_bar"
 android:gravity="bottom"
 android:orientation="vertical"
 android:paddingBottom="@dimen/activity_vertical_margin"
 android:paddingLeft="@dimen/activity_horizontal_margin"
 android:paddingRight="@dimen/activity_horizontal_margin"
 android:paddingTop="@dimen/activity_vertical_margin">

 <ImageView
 android:id="@+id/imageView"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:paddingTop="@dimen/nav_header_vertical_spacing"
 android:src="@android:drawable/sym_def_app_icon" />

 <TextView
 android:id="@+id/manner"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:paddingTop="@dimen/nav_header_vertical_spacing"
 android:text="ma"
 android:textColor="@color/black"
 android:textAppearance="@style/TextAppearance.AppCompat.Body1" />

 <TextView
 android:id="@+id/textView"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:text="android.studio@android.com" /></LinearLayout>

manner is the id where I wanted to display the fetched userName and this is the .java file

@Override
 protected void onCreate(Bundle savedInstanceState) 
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_testing2);

 Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
 setSupportActionBar(toolbar);

 ////////Code is used to fetch the user name////////////
 Bundle b = getIntent().getExtras();
 ////////Code is used to display the user name after fetchig it from other activity////////////
 TextView facebookName = (TextView) findViewById(R.id.manner);

 facebookName.setText(b.getCharSequence("name"));
 /////////////////////////




 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);



 

 @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.testing2, 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_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;
 
}

There is no error in this code because the code perfectly works for different activity with the below text view

<TextView
 android:id="@+id/manner"
 android:layout_gravity="left"
 android:layout_height="wrap_content"
 android:layout_width="wrap_content"
 android:text=""
 android:textAppearance="?android:attr/textAppearanceMedium" />

In oncreate of the activity try this

 NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
TextView txtProfileName = (TextView) navigationView.getHeaderView(0).findViewById(R.id.manner);
txtProfileName.setText(userName);