Develop Reference

How to change navigation menu to back arrow?

I am creating an application in which I use navigation menu. When I click on menu, navigation drawer open, and I click on an item and open a fragment. I want that, when fragment open navigation menu change into back arrow.
Here is my code of Activity:
public class Container_Activity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener {
FrameLayout frameLayout;
private Boolean exit = false;
FloatingActionButton floatingActionButton;
static Container_Activity activity;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_container_);
if (android.os.Build.VERSION.SDK_INT >= 21) {
Window window = this.getWindow();
window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
window.clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
window.setStatusBarColor(this.getResources().getColor(R.color.statusbarcolor));
}
activity = this;
if (savedInstanceState == null) {
Container_Activity.showFragment(new Home_fragment(), "");
}
frameLayout = (FrameLayout) findViewById(R.id.container_frame);
floatingActionButton = (FloatingActionButton) findViewById(R.id.fab);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
toolbar.setNavigationIcon(getResources().getDrawable(R.drawable.ic_arrow_back));
if (getSupportActionBar() != null) {
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setDisplayShowHomeEnabled(true);
}
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);
floatingActionButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Container_Activity.showFragment(new ConctactUs_fragment(), "");
}
});
}
public void showFloatingActionButton() {
floatingActionButton.show();
}
;
public void hideFloatingActionButton() {
floatingActionButton.hide();
}
;
#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 onNavigationItemSelected(#NonNull MenuItem item) {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
switch (item.getItemId()) {
case R.id.home_item:
showFragment(new Home_fragment(), "Home");
break;
case R.id.services:
showFragment(new Services_fragment(), "Services");
break;
case R.id.portfolio_item:
showFragment(new Portfolio_fragment(), "Portfolio");
break;
case R.id.training_item:
showFragment(new Training_fragment(), "Training");
break;
case R.id.gallery_item:
showFragment(new Gallery_Fragment(), "Gallery");
break;
case R.id.share_item:
shareurl();
break;
case R.id.reach_us:
showFragment(new ConctactUs_fragment(), "Contact");
break;
}
return false;
}
private void shareurl() {
Intent sendIntent = new Intent();
sendIntent.setAction(Intent.ACTION_SEND);
sendIntent.putExtra(Intent.EXTRA_TEXT,
"Hey check out my app at: https://play.google.com/store/apps/details?id=com.techenrage");
sendIntent.setType("text/plain");
startActivity(sendIntent);
}
public static void showFragment(Fragment fragment, String Tag) {
FragmentManager manager = activity.getSupportFragmentManager();
FragmentTransaction transcation = manager.beginTransaction();
transcation.replace(R.id.container_frame, fragment, Tag);
transcation.addToBackStack(Tag);
transcation.commit();
}
#Override
public boolean dispatchTouchEvent(MotionEvent ev) {
if (ev.getAction() == MotionEvent.ACTION_DOWN) {
View v = getCurrentFocus();
if (v instanceof EditText) {
Rect outRect = new Rect();
v.getGlobalVisibleRect(outRect);
if (!outRect.contains((int) ev.getRawX(), (int) ev.getRawY())) {
v.clearFocus();
InputMethodManager imm = (InputMethodManager) getSystemService(activity.INPUT_METHOD_SERVICE);
imm.hideSoftInputFromWindow(v.getWindowToken(), 0);
}
}
}
return super.dispatchTouchEvent(ev);
}
}
Fragment Class:
public class Portfolio_fragment extends Fragment {
TabLayout tabLayout;
ViewPager viewPager;
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
final View view = inflater.inflate(R.layout.portfolio_fragment, container, false);
((AppCompatActivity) getActivity()).getSupportActionBar().setTitle("Portfolio");
tabLayout = (TabLayout) view.findViewById(R.id.tabLayout);
tabLayout.setupWithViewPager(viewPager);
tabLayout.addTab(tabLayout.newTab().setText("Websites"));
tabLayout.addTab(tabLayout.newTab().setText("Mobile Application"));
tabLayout.addTab(tabLayout.newTab().setText("Graphics"));
tabLayout.setTabGravity(TabLayout.GRAVITY_FILL);
viewPager = (ViewPager) view.findViewById(R.id.portfolio_pager);
Portfolio_Adapter adapter = new Portfolio_Adapter(getChildFragmentManager(), tabLayout.getTabCount());
viewPager.setAdapter(adapter);
tabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
#Override
public void onTabSelected(TabLayout.Tab tab) {
viewPager.setCurrentItem(tab.getPosition());
}
#Override
public void onTabUnselected(TabLayout.Tab tab) {
}
#Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
return view;
}
}

try this
#Override
protected void onCreateView(Bundle savedInstanceState) {
((AppCompatActivity) getActivity()).getSupportActionBar().setHomeAsUpIndicator(R.drawable.back_button);
((AppCompatActivity) getActivity()).getSupportActionBar().setDisplayHomeAsUpEnabled(true);
}

how to add Activity class in DrawerLayout in android?

I have some slides with ViewPager that shows application help and I want to show it in DrawerLayout too.
this is HelpActivity.class:
public class HelpActivity extends Activity {
private ViewPager viewPager;
private MyViewPagerAdapter myViewPagerAdapter;
private LinearLayout dotsLayout;
private TextView[] dots;
private int[] layouts;
private Button btnSkip, btnNext;
private PrefManager prefManager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Checking for first time launch - before calling setContentView()
prefManager = new PrefManager(this);
if (!prefManager.isFirstTimeLaunch()) {
launchHomeScreen();
finish();
}
// Making notification bar transparent
if (Build.VERSION.SDK_INT >= 21) {
getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
}
setContentView(R.layout.fragment_help);
viewPager = (ViewPager) findViewById(R.id.view_pager);
dotsLayout = (LinearLayout) findViewById(R.id.layoutDots);
btnSkip = (Button) findViewById(R.id.btn_skip);
btnNext = (Button) findViewById(R.id.btn_next);
// layouts of all welcome sliders
// add few more layouts if you want
layouts = new int[]{
R.layout.welcome_1,
R.layout.welcome_2,
R.layout.welcome_3,
R.layout.welcome_4,
R.layout.welcome_5,
R.layout.welcome_6,
R.layout.welcome_7};
// adding bottom dots
addBottomDots(0);
// making notification bar transparent
changeStatusBarColor();
myViewPagerAdapter = new MyViewPagerAdapter();
viewPager.setAdapter(myViewPagerAdapter);
viewPager.addOnPageChangeListener(viewPagerPageChangeListener);
btnSkip.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
launchHomeScreen();
}
});
btnNext.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// checking for last page
// if last page home screen will be launched
int current = getItem(+1);
if (current < layouts.length) {
// move to next screen
viewPager.setCurrentItem(current);
} else {
launchHomeScreen();
}
}
});
}
private void addBottomDots(int currentPage) {
dots = new TextView[layouts.length];
int[] colorsActive = getResources().getIntArray(R.array.array_dot_active);
int[] colorsInactive = getResources().getIntArray(R.array.array_dot_inactive);
dotsLayout.removeAllViews();
for (int i = 0; i < dots.length; i++) {
dots[i] = new TextView(this);
dots[i].setText(Html.fromHtml("•"));
dots[i].setTextSize(35);
dots[i].setTextColor(colorsInactive[currentPage]);
dotsLayout.addView(dots[i]);
}
if (dots.length > 0)
dots[currentPage].setTextColor(colorsActive[currentPage]);
}
private int getItem(int i) {
return viewPager.getCurrentItem() + i;
}
private void launchHomeScreen() {
prefManager.setFirstTimeLaunch(false);
startActivity(new Intent(HelpActivity.this, MainActivity.class));
finish();
}
// viewpager change listener
ViewPager.OnPageChangeListener viewPagerPageChangeListener = new ViewPager.OnPageChangeListener() {
#Override
public void onPageSelected(int position) {
addBottomDots(position);
// changing the next button text 'NEXT' / 'GOT IT'
if (position == layouts.length - 1) {
// last page. make button text to GOT IT
btnNext.setText(/*getString(R.string.start)*/ "Start");
btnSkip.setVisibility(View.GONE);
} else {
// still pages are left
btnNext.setText(/*getString(R.string.next)*/ "Next");
btnSkip.setVisibility(View.VISIBLE);
}
}
#Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
#Override
public void onPageScrollStateChanged(int arg0) {
}
};
/**
* Making notification bar transparent
*/
private void changeStatusBarColor() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
Window window = getWindow();
window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
window.setStatusBarColor(Color.TRANSPARENT);
}
}
/**
* View pager adapter
*/
public class MyViewPagerAdapter extends PagerAdapter {
private LayoutInflater layoutInflater;
public MyViewPagerAdapter() {
}
#Override
public Object instantiateItem(ViewGroup container, int position) {
layoutInflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View view = layoutInflater.inflate(layouts[position], container, false);
container.addView(view);
return view;
}
#Override
public int getCount() {
return layouts.length;
}
#Override
public boolean isViewFromObject(View view, Object obj) {
return view == obj;
}
#Override
public void destroyItem(ViewGroup container, int position, Object object) {
View view = (View) object;
container.removeView(view);
}
}
}
this is PrefManager.class:
public class PrefManager {
SharedPreferences pref;
SharedPreferences.Editor editor;
Context _context;
// shared pref mode
int PRIVATE_MODE = 0;
// Shared preferences file name
private static final String PREF_NAME = "stand up-welcome";
private static final String IS_FIRST_TIME_LAUNCH = "IsFirstTimeLaunch";
public PrefManager(Context context) {
this._context = context;
pref = _context.getSharedPreferences(PREF_NAME, PRIVATE_MODE);
editor = pref.edit();
}
public void setFirstTimeLaunch(boolean isFirstTime) {
editor.putBoolean(IS_FIRST_TIME_LAUNCH, isFirstTime);
editor.commit();
}
public boolean isFirstTimeLaunch() {
return pref.getBoolean(IS_FIRST_TIME_LAUNCH, true);
}
}
and I use this code for defining it to drawerLayout:
public void selectDrawerItem(MenuItem menuItem) {
if (menuItem.getItemId()== R.id.nav_item_help) {
//startActivityForResult(new Intent(this,HelpActivity.class),1000);
startActivity(new Intent(MainActivity.this,HelpActivity.class));
}
with clicking on help in drawer, nothing shows. what should I do?
This is MainActivity.class:
ublic class MainActivity extends AppCompatActivity {
public DrawerLayout drawerLayout;
public Toolbar toolbar;
public NavigationView navigationView;
public ActionBarDrawerToggle actionBarDrawerToggle;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
FragmentTransaction tx = getSupportFragmentManager().beginTransaction();
tx.replace(R.id.flContent, new HomeFragment());
tx.commit();
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
//drawer layout
drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
actionBarDrawerToggle= setupDrawerToggle();
drawerLayout.setDrawerListener(actionBarDrawerToggle);
//navigation view
navigationView= (NavigationView) findViewById(R.id.nvView);
// Setup drawer view
setupDrawerContent(navigationView);
actionBarDrawerToggle.syncState();
// default item of navigation view
// navigationView.getMenu().getItem(0).setChecked(true);
navigationView.setCheckedItem(R.id.nav_item_home);
}//onCreate
private ActionBarDrawerToggle setupDrawerToggle() {
return new ActionBarDrawerToggle(this, drawerLayout, toolbar, R.string.drawer_open, R.string.drawer_close);
}
private void setupDrawerContent(NavigationView navigationView) {
navigationView.setNavigationItemSelectedListener(
new NavigationView.OnNavigationItemSelectedListener() {
#Override
public boolean onNavigationItemSelected(MenuItem menuItem) {
selectDrawerItem(menuItem);
return true;
}
});
}
public void selectDrawerItem(MenuItem menuItem) {
if (menuItem.getItemId()==R.id.nav_item_setting){
startActivityForResult(new Intent(this, SettingActivity.class), 1002);
}
if (menuItem.getItemId()== R.id.nav_item_help) {
//startActivityForResult(new Intent(this,HelpActivity.class),1000);
startActivity(new Intent(MainActivity.this,HelpActivity.class));
}
// Create a new fragment and specify the fragment to show based on nav item clicked
android.support.v4.app.Fragment fragment = null /*new android.support.v4.app.Fragment()*/;
Class fragmentClass = null;
switch(menuItem.getItemId()) {
case R.id.nav_item_home:
fragmentClass = HomeFragment.class;
break;
case R.id.nav_item_knowledge:
fragmentClass = HomeFragment.class;
break;
/* case R.id.nav_item_help:
fragmentClass = HelpActivity.class;
break;*/
case R.id.nav_item_about:
fragmentClass =AboutFragment.class;
break;
default:
fragmentClass = HomeFragment.class;
break;
} try {
fragment = (android.support.v4.app.Fragment) fragmentClass.newInstance();
} catch (Exception e) {
e.printStackTrace();
}
// Insert the fragment by replacing any existing fragment
android.support.v4.app.FragmentManager fragmentManager = getSupportFragmentManager();
android.support.v4.app.Fragment currentFragment = getSupportFragmentManager().findFragmentById(R.id.flContent);
if(currentFragment==null){
fragmentManager.beginTransaction().add(R.id.flContent, fragment).commit();
}else{
fragmentManager.beginTransaction().replace(R.id.flContent, fragment).commit();
}
// Highlight the selected item has been done by NavigationView
menuItem.setChecked(true);
// Set action bar title
setTitle(menuItem.getTitle());
// Close the navigation drawer
drawerLayout.closeDrawers();
}
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
// Pass any configuration change to the drawer toggles
actionBarDrawerToggle.onConfigurationChanged(newConfig);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
if (actionBarDrawerToggle.onOptionsItemSelected(item)) {
return true;
} return super.onOptionsItemSelected(item);
}
#Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState); // `onPostCreate` called when activity start-up is complete after `onStart()`
}
#Override
public void onBackPressed() {
MainActivity.this.finish();
}
}

in your xml:
<android.support.design.widget.NavigationView
android:id="#+id/navigation_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="right"
android:background="#drawable/background_drawer"
app:headerLayout="#layout/nav_header"
app:itemIconTint="#color/colorPrimary"
app:menu="#menu/menu_navigation" />
you have to add help options in your menu_navigation
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<group android:checkableBehavior="single">
<item
android:id="#+id/nav_item_help"
android:icon="#drawable/profile_icon"
android:title="Help" />
</group>
</menu>
Also in your MainActivity:
public void selectDrawerItem(MenuItem menuItem) {
// Create a new fragment and specify the fragment to show based on nav item clicked
android.support.v4.app.Fragment fragment = null /*new android.support.v4.app.Fragment()*/;
Class fragmentClass = null;
switch(menuItem.getItemId()) {
case R.id.nav_item_setting:
Intent i = new Intent(MainActivity.this, SettingActivity.class);
startActivity(i);
break;
case R.id.nav_item_help:
Intent i = new Intent(MainActivity.this, HelpActivity.class);
startActivity(i);
break;
case R.id.nav_item_home:
fragmentClass = HomeFragment.class;
break;
case R.id.nav_item_knowledge:
fragmentClass = HomeFragment.class;
break;
/* case R.id.nav_item_help:
fragmentClass = HelpActivity.class;
break;*/
case R.id.nav_item_about:
fragmentClass =AboutFragment.class;
break;
default:
fragmentClass = HomeFragment.class;
break;
} try {
fragment = (android.support.v4.app.Fragment) fragmentClass.newInstance();
} catch (Exception e) {
e.printStackTrace();
}
// Insert the fragment by replacing any existing fragment
android.support.v4.app.FragmentManager fragmentManager = getSupportFragmentManager();
android.support.v4.app.Fragment currentFragment = getSupportFragmentManager().findFragmentById(R.id.flContent);
if(currentFragment==null){
fragmentManager.beginTransaction().add(R.id.flContent, fragment).commit();
}else{
fragmentManager.beginTransaction().replace(R.id.flContent, fragment).commit();
}
// Highlight the selected item has been done by NavigationView
menuItem.setChecked(true);
// Set action bar title
setTitle(menuItem.getTitle());
// Close the navigation drawer
drawerLayout.closeDrawers();
}
In your preference manager:
public void setFirstTimeLaunch(boolean isFirstTime) {
Editor editor = pref.edit();
editor.putBoolean(IS_FIRST_TIME_LAUNCH, isFirstTime);
editor.commit();
}
difference between startactivity and startActivityForResult is:
1. startActvity():
startActivity() will start the activity you want to start without worrying about getting any result from new child activity started by startActivity to parent activity.
2. startAcitvityForResult():
startAcitvityForResult() starts another activity from your activity and it expect to get some data from newly started child activity by startAcitvityForResult() and return that to parent activity.
see this blog:https://malikshafique.wordpress.com/2012/06/14/android-startactivity-and-startactivityforresult/

when i open my app , how to avoid BottomBar automatically selected AboutusTab?

when i open my application,default selected Home_Tab is opened,working fine....but in this Home_Tab,Bottombar also there ,i dont want default selection tab of About Us??
if i want click AboutUs_Tab that time it will open???
but in this above image when i open Home_Tab ,automatically selected AboutUs_Tab but not opened it ,will try to click that aboutUs_Tab not working???
When i click ContactUS_Tab and return to AboutUs_Tab ,that time AboutUS_Tab opened??how to avoid this issue??
this is my code
public class MainActivity extends FragmentActivity {
private Context context;
//This is our tablayout
private TabLayout tabLayout;
BottomBar bottombar;
//This is our viewPager
private ViewPager viewPager;
public ViewPagerAdapter FragmentStatePagerAdapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//setHasOptionsMenu(true);
bottombar = BottomBar.attach(MainActivity.this, savedInstanceState);
bottombar.noNavBarGoodness();
bottombar.setItemsFromMenu(R.menu.bottom_bar_menu, new OnMenuTabSelectedListener() {
#Override
public void onMenuItemSelected(int itemId) {
switch (itemId) {
case R.id.about_us:
About_Us about_us = new About_Us();
About_Fragment about_fragment = new About_Fragment();
getSupportFragmentManager().beginTransaction().replace(R.id.Home_BottomBar_Fragment, about_fragment).commit();
break;
case R.id.contact_us:
ContactUs_Activity contactUs_activity = new ContactUs_Activity();
Contact_us_Fragment contact_us_fragment = new Contact_us_Fragment();
FragmentManager fm2 = getSupportFragmentManager();
FragmentTransaction ft2 = fm2.beginTransaction();
ft2.replace(R.id.Home_BottomBar_Fragment, contact_us_fragment).commit();
//squareFragment.updateColor(Color.parseColor(colors[1]));
//Toast.makeText(MainActivity.this,"selected contact_us",Toast.LENGTH_SHORT).show();
break;
case R.id.donate_us:
Donate_us_Fragment donate_us_fragment = new Donate_us_Fragment();
getSupportFragmentManager().beginTransaction().replace(R.id.Home_BottomBar_Fragment, donate_us_fragment).commit();
//Toast.makeText(MainActivity.this,"selected donate_us",Toast.LENGTH_SHORT).show();
break;
default:
}
}
});
//Initializing the tablayout
tabLayout = (TabLayout) findViewById(R.id.tabLayout);
//Adding the tabs using addTab() method
tabLayout.addTab(tabLayout.newTab().setText("Home").setIcon(R.drawable.home_selector));
tabLayout.addTab(tabLayout.newTab().setText("News").setIcon(R.drawable.news_selector));
tabLayout.addTab(tabLayout.newTab().setText("Videos").setIcon(R.drawable.video_selector));
tabLayout.addTab(tabLayout.newTab().setText("PodCasts").setIcon(R.drawable.podcast_selector));
tabLayout.addTab(tabLayout.newTab().setText("More").setIcon(R.drawable.more_selector));
tabLayout.setTabGravity(TabLayout.GRAVITY_FILL);
//tabLayout.setupWithViewPager(viewPager);
//Initializing viewPager
viewPager = (ViewPager) findViewById(R.id.pager);
//Creating our pager adapter
ViewPagerAdapter adapter = new ViewPagerAdapter(getSupportFragmentManager(), tabLayout.getTabCount());
//Adding adapter to pager
viewPager.setAdapter(adapter);
viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
tabLayout.setOnTabSelectedListener(new TabLayout.ViewPagerOnTabSelectedListener(viewPager) {
#Override
public void onTabSelected(TabLayout.Tab tab) {
if (tab.getPosition() == 0) {
bottombar.show();
//bottombar.getCurrentTabPosition();
} else if (tab.getPosition() == 1) {
bottombar.hide();
} else if (tab.getPosition() == 2) {
bottombar.hide();
} else if (tab.getPosition() == 3) {
bottombar.hide();
}else if (tab.getPosition() == 4){
bottombar.hide();
}
super.onTabSelected(tab);
}
#Override
public void onTabUnselected(TabLayout.Tab tab) {
super.onTabUnselected(tab);
//tab.getIcon().setAlpha(127);
}
});
}
#Override
protected void onSaveInstanceState(Bundle outstate) {
super.onSaveInstanceState(outstate);
// Necessary to restore the BottomBar's state, otherwise we would
// lose the current tab on orientation change.
bottombar.onSaveInstanceState(outstate);
}
}

You can manually set the default selected tab in bottom bar with:
bottomBar.setDefaultTabPosition(1);
Use this after initializing the bottom bar.

You need to add one dummy invisible item for make your thinks work. For that create one more item :
<item android:id="#+id/none"
android:title=""/>
where you create your items. And then in your code change to this :
bottombar.setItemsFromMenu(R.menu.bottom_bar_menu, new OnMenuTabSelectedListener() {
#Override
public void onMenuItemSelected(int itemId) {
switch (itemId) {
case R.id.none:
break;
case R.id.about_us:
About_Us about_us = new About_Us();
About_Fragment about_fragment = new About_Fragment();
getSupportFragmentManager().beginTransaction().replace(R.id.Home_BottomBar_Fragment, about_fragment).commit();
break;
case R.id.contact_us:
ContactUs_Activity contactUs_activity = new ContactUs_Activity();
Contact_us_Fragment contact_us_fragment = new Contact_us_Fragment();
FragmentManager fm2 = getSupportFragmentManager();
FragmentTransaction ft2 = fm2.beginTransaction();
ft2.replace(R.id.Home_BottomBar_Fragment, contact_us_fragment).commit();
//squareFragment.updateColor(Color.parseColor(colors[1]));
//Toast.makeText(MainActivity.this,"selected contact_us",Toast.LENGTH_SHORT).show();
break;
case R.id.donate_us:
Donate_us_Fragment donate_us_fragment = new Donate_us_Fragment();
getSupportFragmentManager().beginTransaction().replace(R.id.Home_BottomBar_Fragment, donate_us_fragment).commit();
//Toast.makeText(MainActivity.this,"selected donate_us",Toast.LENGTH_SHORT).show();
break;
default:
}
}
});

Not able to call TablayoutActivity from AppcombatActivity

I want to call my tablayout activity , when user clicked on Item Menu from Action View Item ,
But I am getting error :
06-15 14:17:01.604: E/AndroidRuntime(1365): java.lang.NoClassDefFoundError: Failed resolution of: Linfo/muscle/reboot/activity/Wrk_plan_gain;
Here is my Main activity from where I am calling Tab layout Activity .
MainActivity:
public class MainActivity extends AppCompatActivity implements FragmentDrawer.FragmentDrawerListener {
public MainActivity() {
// Required empty public constructor
}
private static String TAG = MainActivity.class.getSimpleName();
private Toolbar mToolbar;
private FragmentDrawer drawerFragment;
SharedPreferences pref;
String diet_saved;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
pref = this.getPreferences(1);
diet_saved=pref.getString("diettype", "main");
mToolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(mToolbar);
getSupportActionBar().setDisplayShowHomeEnabled(true);
drawerFragment = (FragmentDrawer)
getSupportFragmentManager().findFragmentById(R.id.fragment_navigation_drawer);
drawerFragment.setUp(R.id.fragment_navigation_drawer, (DrawerLayout) findViewById(R.id.drawer_layout), mToolbar);
drawerFragment.setDrawerListener(this);
// display the first navigation drawer view on app launch
displayView(0);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.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.workout_menu) {
startActivity(new Intent(MainActivity.this, Wrk_plan_gain.class));
finish();
return true;
}
/*if(id == R.id.action_search){
Toast.makeText(getApplicationContext(), "Search action is selected!", Toast.LENGTH_SHORT).show();
return true;
}
*/
return super.onOptionsItemSelected(item);
}
#Override
public void onDrawerItemSelected(View view, int position) {
displayView(position);
}
private void displayView(int position) {
Fragment fragment = null;
String title = getString(R.string.app_name);
switch (position) {
case 0:
fragment = new HomeFragment();
title = getString(R.string.title_home);
break;
case 1:
fragment = new KnowYourBodyFragment();
title = getString(R.string.title_friends);
break;
case 2:
fragment = new YourResultFragment();
title = getString(R.string.title_messages);
break;
case 3:
fragment = new YourMacroResultFragment();
title = getString(R.string.title_macro);
break;
case 4:
fragment = new DietPlanFragment();
title = getString(R.string.title_Diet);
break;
case 5:
title = getString(R.string.title_Exit);
finish();
break;
default:
}
if (fragment != null) {
FragmentManager fragmentManager = getSupportFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.replace(R.id.container_body, fragment);
fragmentTransaction.commit();
// set the toolbar title
getSupportActionBar().setTitle(title);
}
}
}
and I am trying call this Activity
public class Wrk_plan_gain extends AppCompatActivity implements TabLayout.OnTabSelectedListener {
public Wrk_plan_gain() {
// Required empty public constructor
}
//This is our tablayout
private TabLayout tabLayout;
//This is our viewPager
private ViewPager viewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.wrk_plan_layout_gain);
//Adding toolbar to the activity
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
//Initializing the tablayout
tabLayout = (TabLayout) findViewById(R.id.tabLayout);
//Adding the tabs using addTab() method
tabLayout.addTab(tabLayout.newTab().setText("Tab1"));
tabLayout.addTab(tabLayout.newTab().setText("Tab2"));
tabLayout.addTab(tabLayout.newTab().setText("Tab3"));
tabLayout.setTabGravity(TabLayout.GRAVITY_FILL);
//Initializing viewPager
viewPager = (ViewPager) findViewById(R.id.pager);
//Creating our pager adapter
Pager adapter = new Pager(getSupportFragmentManager(), tabLayout.getTabCount());
//Adding adapter to pager
viewPager.setAdapter(adapter);
//Adding onTabSelectedListener to swipe views
tabLayout.setOnTabSelectedListener(this);
}
#Override
public void onTabSelected(TabLayout.Tab tab) {
viewPager.setCurrentItem(tab.getPosition());
}
#Override
public void onTabUnselected(TabLayout.Tab tab) {
}
#Override
public void onTabReselected(TabLayout.Tab tab) {
}
}
Also it will every much help full I f I can call this activity from Nav drawer Item ..
I am not able to get it work , in both cases .

NavigationDrawer not show the view

I have a Navigation Drawer with Navigation View, there are four tabs, one of them is a fragment, which includes ViewPager, ie is a host for the other fragments. Everything works fine, but when switched from fragment with ViewPager any other fragment of NavigationDrawer shows nothing. Checked logs, onCreate, onCreateView these fragments are called, but why does not display... Who knows why?
NavigationDrawer
public class NavigationDrawerHost extends AppCompatActivity implements
NavigationView.OnNavigationItemSelectedListener {
//буду использовать эту активность как хост под все фрагменты, чтобы верно работал мой drawer!
public static String WHERE_FROM = NavigationDrawerHost.class.getSimpleName();
public static Toolbar toolbar;
public static ProgressBar progressBar;
private DrawerLayout drawer;
private NavigationView navigationView;
private ActionBarDrawerToggle drawerToggle;
private int navItemId;
private static final String NAV_ITEM_ID = "NAV_ITEM_ID";
private TextView userFirstNameTextView, userLastNameTextView;
private ImageView userPhotoImageView;
private VKAccessToken access_token; //токен это информация о правах доступа
private VKApiUser user; //текущий пользователь
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.navigation_drawer_host);
progressBar = (ProgressBar) findViewById(R.id.progressBar);
drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
// Find the toolbar view inside the activity layout
toolbar = (Toolbar) findViewById(R.id.toolbar);
// Set a Toolbar to replace the ActionBar.
setSupportActionBar(toolbar);
//setTitle(R.string.drawer_menu_posts);
// load saved navigation state if present
if (null == savedInstanceState) {
navItemId = R.id.posts_fragment;
} else {
navItemId = savedInstanceState.getInt(NAV_ITEM_ID);
}
// Find our drawer view
navigationView = (NavigationView) findViewById(R.id.nvView);
navigationView.setNavigationItemSelectedListener(this);
// select the correct nav menu item
navigationView.getMenu().findItem(navItemId).setChecked(true);
// если хотим добавить какие-то элементы в наш header,
// то нужно добавить их в layout, а затем инициализировать нижеприведенным способом
// Inflate the header view at runtime
View headerLayout = navigationView.inflateHeaderView(R.layout.nav_header);
// We can now look up items within the header if needed
userFirstNameTextView = (TextView) headerLayout.findViewById(R.id.user_first_name);
userLastNameTextView = (TextView) headerLayout.findViewById(R.id.user_last_name);
userPhotoImageView = (ImageView) headerLayout.findViewById(R.id.user_photo);
drawerToggle = new ActionBarDrawerToggle(this, drawer, toolbar, R.string.drawer_open, R.string.drawer_close);
// Tie DrawerLayout events to the ActionBarToggle
drawer.setDrawerListener(drawerToggle);
drawerToggle.syncState();
selectItem(navItemId);
}
#Override
protected void onSaveInstanceState(final Bundle outState) {
super.onSaveInstanceState(outState);
outState.putInt(NAV_ITEM_ID, navItemId);
}
// Menu icons are inflated just as they were with actionbar
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.menu_exit:
//quitDialog();
VKSdk.logout();
finish();
return true;
default:
return drawerToggle.onOptionsItemSelected(item) || super.onOptionsItemSelected(item);
}
}
// Make sure this is the method with just `Bundle` as the signature
#Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
drawerToggle.syncState();
}
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
// Pass any configuration change to the drawer toggles
drawerToggle.onConfigurationChanged(newConfig);
}
private void selectItem(final int itemId) {
// perform the actual navigation logic, updating the main content fragment etc
// Create a new fragment and specify the planet to show based on position
Fragment fragment = null;
Class fragmentClass = null;
switch (itemId) {
case R.id.posts_fragment:
fragmentClass = PostsFragment.class;
fragment = new PostsFragment();
break;
case R.id.albums_fragment:
fragmentClass = FragmentTest.class;
fragment = new FragmentTest();
break;
case R.id.friends_fragment:
fragmentClass = FragmentTest.class;
fragment = new FragmentTest();
break;
case R.id.likes_fragment:
fragmentClass = LikesFragment.class;
fragment = new LikesFragment();
break;
/*default:
fragmentClass = PostsFragment.class;*/
}
/*try {
fragment = (Fragment) fragmentClass.newInstance();
} catch (Exception e) {
e.printStackTrace();
}*/
// Insert the fragment by replacing any existing fragment
FragmentManager fragmentManager = getSupportFragmentManager();
FragmentTransaction transaction = fragmentManager.beginTransaction();
transaction.replace(R.id.fragment_container, fragment);
transaction.addToBackStack(null);
transaction.commit();
drawer.closeDrawers();
}
#Override
public boolean onNavigationItemSelected(final MenuItem item) {
// update highlighted item in the navigation menu
item.setChecked(true);
setTitle(item.getTitle());
navItemId = item.getItemId();
// allow some time after closing the drawer before performing real navigation
// so the user can see what is happening
drawer.closeDrawer(GravityCompat.START);
selectItem(item.getItemId());
return true;
}
#Override
public void onBackPressed() {
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else if (getSupportFragmentManager().getBackStackEntryCount() == 0) {
quitDialog();
} else {
getSupportFragmentManager().popBackStack();
}
}
private void quitDialog() {
AlertDialog.Builder quitDialog = new AlertDialog.Builder(this);
quitDialog.setTitle("Вы хотите выйти?");
quitDialog.setPositiveButton("Да", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
//стираем БД
Delete.tables(PostTable.class, PictureTable.class, PostTableMyLikes.class, PictureTableMyLikes.class);
FlowManager.getDatabase(WallDatabase.DB_NAME).reset(NavigationDrawerHost.this);
FlowManager.getDatabase(WallDatabaseMyLikes.DB_NAME).reset(NavigationDrawerHost.this);
Intent intent = new Intent(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_HOME);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
}
});
quitDialog.setNegativeButton("Нет",
new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
}
});
quitDialog.show();
}
}
ViewPager host for fragments, which needs to display through ViewPager
//этот фрагмент является хостом для MyLikesFragment и FriendLikesFragment, так же тут содержатся табы
public class LikesFragment extends Fragment {
public static String WHERE_FROM_FRIENDS_LIKES = LikesFragment.class.getSimpleName() + "_FRIENDSLIKES";
private ViewPager viewPager;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.likes_fragment, container, false);
TabLayout tabLayout = (TabLayout) v.findViewById(R.id.tab_layout);
tabLayout.addTab(tabLayout.newTab().setText("Мои лайки"));
tabLayout.addTab(tabLayout.newTab().setText("Лайки друзей"));
tabLayout.setTabGravity(TabLayout.GRAVITY_FILL);
viewPager = (ViewPager) v.findViewById(R.id.view_pager);
viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
viewPager.setAdapter(new LikesPagerAdapter(getChildFragmentManager()));
tabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
#Override
public void onTabSelected(TabLayout.Tab tab) {
viewPager.setCurrentItem(tab.getPosition());
}
#Override
public void onTabUnselected(TabLayout.Tab tab) {
}
#Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
return v;
}
public static class LikesPagerAdapter extends FragmentPagerAdapter {
public LikesPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public int getCount() {
return 2;
}
//сделано так, чтобы передавать те аргументы, от которых будет зависеть функционал фрагмента
#Override
public Fragment getItem(int position) {
return (position == 0) ? new MyLikesPostsFragment() : new PostsFragment();
}
#Override
public CharSequence getPageTitle(int position) {
return (position == 0) ? "Мои лайки" : "Лайки друзей";
}
}
}
P.S. And after going to the same fragment ViewPager select several items in drawer, this should not be

The problem was that I called adapter.notifyDataSetChanged() in the main thread and onPostExecute() in AsyncTask. My carelessness...