Develop Reference

Android - SearchView not working in fragment present in MainActivity

Hello so I have a MainActivity which consists of two fragments one is home and the other notifications.
When the app is opened by default the Home fragment is displayed.My app has a navigation bar which comes with an app bar by default where all the Menu Items are inflated.
My home fragment consists of Posts and in the app bar there's a search icon (SearchView) when i click it and search for something nothing happens.
HomeFragment.java
public class HomeFragment extends Fragment {
private static final String ARG_PARAM1 = "param1";
private static final String ARG_PARAM2 = "param2";
// TODO: Rename and change types of parameters
private String mParam1;
private String mParam2;
private HomeFragment.OnFragmentInteractionListener mListener;
private RecyclerView rv;
private FirebaseAuth fba;
private List<PostActivity> postItems;
private FirebaseUser user;
private Toolbar toolbar;
private PostAdapter pa;
public static HomeFragment newInstance(String param1, String param2) {
HomeFragment fragment = new HomeFragment();
Bundle args = new Bundle();
args.putString(ARG_PARAM1, param1);
args.putString(ARG_PARAM2, param2);
fragment.setArguments(args);
return fragment;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
mParam1 = getArguments().getString(ARG_PARAM1);
mParam2 = getArguments().getString(ARG_PARAM2);
}
}
public HomeFragment() {
// Required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_home, container, false);
user = FirebaseAuth.getInstance().getCurrentUser();
fba = FirebaseAuth.getInstance();
// dr = FirebaseDatabase.getInstance().getReference().child("Chat_Profiles");
rv =view.findViewById(R.id.rvPostItems);
LinearLayoutManager layoutManager = new LinearLayoutManager(getActivity());
rv.setLayoutManager(layoutManager);
layoutManager.setReverseLayout(true);
layoutManager.setStackFromEnd(true);
postItems = new ArrayList<>();
rv.addItemDecoration(new DividerItemDecoration(rv.getContext(), DividerItemDecoration.VERTICAL));
loadPosts();
registerForContextMenu(rv);
return view;
}
public void loadPosts() {
DatabaseReference dr = FirebaseDatabase.getInstance().getReference("Posts");
dr.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
postItems.clear();
for (DataSnapshot ds : dataSnapshot.getChildren()) {
PostActivity pac = ds.getValue(PostActivity.class);
postItems.add(pac);
pa = new PostAdapter(postItems, getActivity());
rv.setAdapter(pa);
pa.notifyDataSetChanged();
}
}
#Override
public void onCancelled(#NonNull DatabaseError databaseError) {
Toast.makeText(getActivity(), "Failed !", Toast.LENGTH_SHORT).show();
}
});
}
public void searchPosts(String query){
DatabaseReference dr = FirebaseDatabase.getInstance().getReference("Posts");
dr.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
postItems.clear();
for (DataSnapshot ds : dataSnapshot.getChildren()) {
PostActivity pac = ds.getValue(PostActivity.class);
if(pac.getDesc().toLowerCase().contains(query.toLowerCase())) {
postItems.add(pac);
}
pa = new PostAdapter(postItems, getActivity());
rv.setAdapter(pa);
pa.notifyDataSetChanged();
}
}
#Override
public void onCancelled(#NonNull DatabaseError databaseError) {
Toast.makeText(getActivity(), "Failed !", Toast.LENGTH_SHORT).show();
}
});
}
#Override
public void onCreateOptionsMenu(#NonNull Menu menu, #NonNull MenuInflater inflater) {
inflater.inflate(R.menu.main,menu);
MenuItem searchPosts = menu.findItem(R.id.searchPosts);
SearchView searchView = (SearchView)MenuItemCompat.getActionView(searchPosts);
/*searchView.setIconified(true);
SearchManager searchManager = (SearchManager) getActivity().getSystemService(Context.SEARCH_SERVICE);
searchView.setSearchableInfo(searchManager.getSearchableInfo(getActivity().getComponentName()));*/
searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
#Override
public boolean onQueryTextSubmit(String s) {
if(!TextUtils.isEmpty(s))
searchPosts(s);
else
loadPosts();
return false;
}
#Override
public boolean onQueryTextChange(String s) {
if(!TextUtils.isEmpty(s))
searchPosts(s);
else
loadPosts();
return false;
}
});
super.onCreateOptionsMenu(menu, inflater);
}
#Override
public void onAttach(Context context) {
super.onAttach(context);
if (context instanceof HomeFragment.OnFragmentInteractionListener) {
mListener = (HomeFragment.OnFragmentInteractionListener) context;
} else {
throw new RuntimeException(context.toString()
+ " must implement OnFragmentInteractionListener");
}
}
#Override
public void onDetach() {
super.onDetach();
mListener = null;
}
public interface OnFragmentInteractionListener {
// TODO: Update argument type and name
void onFragmentInteraction(Uri uri);
}
}
MainActivity.java
public class MainActivity extends AppCompatActivity
implements
,HomeFragment.OnFragmentInteractionListener
,NotificationFragment.OnFragmentInteractionListener{
private FirebaseAuth fba;
private FirebaseUser user;
private TextView welcomeUser;
private DatabaseReference dr;
private String name, thumb;
private Toolbar toolbar;
private MaterialSearchView msv;
private FloatingActionButton addPost;
private HomeFragment homeFragment;
private NotificationFragment notificationFragment;
private BottomNavigationView bnv;
private ImageView navImg;
private MenuItem itemToHide;
private Menu postsMenu = null;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
fba = FirebaseAuth.getInstance();
/*if(!fba.getCurrentUser().isEmailVerified()){
fba.getCurrentUser().updateEmail(fba.getCurrentUser().getEmail());
fba.getCurrentUser().sendEmailVerification();
}*/
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayShowTitleEnabled(true);
getSupportActionBar().setTitle("Newsy");
addPost = findViewById(R.id.add_post_btn);
addPost.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent intent = new Intent(MainActivity.this,AddPost.class);
startActivity(intent);
}
});
if (!(fba.getCurrentUser().isEmailVerified()) || fba.getCurrentUser() == null) {
startActivity(new Intent(this, LoginScreen.class));
}
/*if(fba.getCurrentUser()==null ){
startActivity(new Intent(this,LoginScreen.class));
}*/
ConnectionDetector cd = new ConnectionDetector(this);
if(cd.isConnected()){
Toast.makeText(this,"Connection Established !",Toast.LENGTH_LONG).show();
}else{
Toast.makeText(this,"Your phone is Offline,Check your connection !",Toast.LENGTH_LONG).show();
}
user = fba.getCurrentUser();
String id = user.getUid();
dr = FirebaseDatabase.getInstance().getReference().child("Chat_Profiles").child(id);
//ConstraintLayout cl = (ConstraintLayout)findViewById(R.id.LoginScreen);
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);
if (drawer != null) {
drawer.addDrawerListener(toggle);
}
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
dr = FirebaseDatabase.getInstance().getReference().child("Chat_Profiles").child(fba.getCurrentUser().getUid());
if (navigationView != null) {
navigationView.setNavigationItemSelectedListener(this);
View nav_header = navigationView.getHeaderView(0);
dr.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
name = dataSnapshot.child("name").getValue().toString();
thumb = dataSnapshot.child("image").getValue().toString();
CircleImageView circle = (CircleImageView) nav_header.findViewById(R.id.navImg);
Picasso.get().load(thumb).placeholder(R.drawable.default_avatar).into(circle);
welcomeUser = (TextView) nav_header.findViewById(R.id.WelcomeUser);
welcomeUser.setText(name);
}
#Override
public void onCancelled(#NonNull DatabaseError databaseError) {
}
});
}
//add this line to display menu1 when the activity is loaded
displaySelectedScreen(pappuLayout);
Menu menu = navigationView.getMenu();
MenuItem mt = menu.findItem(nav_gallery);
mt.setTitle("News 2");
MenuItem mt2 = menu.findItem(nav_camera);
mt2.setTitle("News 1");
MenuItem mt3 = menu.findItem(nav_sub);
mt3.setTitle("Subscribe !");
//FRAGMENTS MAIN PAGE
bnv = findViewById(R.id.bottomNavigationView2);
homeFragment = new HomeFragment();
replaceFragment(new HomeFragment());
bnv.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
#Override
public boolean onNavigationItemSelected(#NonNull MenuItem item) {
int itemId = item.getItemId();
if (itemId == R.id.bottomHome) {
replaceFragment(homeFragment);
return true;
} else if (itemId == R.id.bottomNotification) {
notificationFragment = new NotificationFragment();
replaceFragment(notificationFragment);
return true;
}
return false;
}
});
}
#Override
protected void onStart() {
super.onStart();
FirebaseUser user = fba.getCurrentUser();
String id = user.getUid();
SharedPreferences sp = getSharedPreferences("USER", MODE_PRIVATE);
SharedPreferences.Editor editor = sp.edit();
editor.putString("Current_User", id);
editor.apply();
Intent intent = new Intent(getBaseContext(), MyUnityPlugin.class);
intent.putExtra("id", id);
dr.child("onlineStatus").setValue("true");
}
#Override
protected void onStop() {
super.onStop();
FirebaseUser user = fba.getCurrentUser();
dr.child("onlineStatus").setValue(ServerValue.TIMESTAMP);
}
#Override
public void onBackPressed() {
int count = getSupportFragmentManager().getBackStackEntryCount();
if (count == 0) {
super.onBackPressed();
} else {
getSupportFragmentManager().popBackStack();
}
}
#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.LogOut) {
fba.signOut();
finish();
startActivity(new Intent(this,LoginScreen.class));
return true;
}else if(id==R.id.settings){
startActivity(new Intent(this,ProfileActivity.class));
return true;
}else if(id==R.id.users){
startActivity(new Intent(this,Users.class));
return true;
}else if(id==R.id.search){
startActivity(new Intent(this,Users.class));
return true;
} else if (id == R.id.notificationSettings) {
startActivity(new Intent(this, SettingsActivity.class));
//startActivity(new Intent(this,UnityPlayerActivity.class));
return true;
}
return super.onOptionsItemSelected(item);
}
#Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
displaySelectedScreen(item.getItemId());
return true;
}
private void displaySelectedScreen(int itemId) {
//creating fragment object
Fragment fragment = null;
//initializing the fragment object which is selected
if (itemId == R.id.nav_gallery) {
fragment = new GalleryFrag();
} else if (itemId == R.id.nav_camera) {
fragment = new CameraFrag();
} else if (itemId == R.id.nav_sub) {
fragment = new Subscribe();
} else if (itemId == R.id.nav_chat) {
fragment = new Chat();
} else if (itemId == R.id.nav_send) {
Intent i = new Intent(MainActivity.this, UnityPlayerActivity.class);
startActivity(i);
}
//replacing the fragment
if (fragment != null) {
ConstraintLayout fl = (ConstraintLayout) findViewById(pappuLayout);
fl.removeAllViews();
FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
ft.add(pappuLayout, fragment).commit();
}
DrawerLayout drawer = (DrawerLayout) findViewById(drawer_layout);
if (drawer != null) {
drawer.closeDrawer(GravityCompat.START);
}
}
#Override
public void onFragmentInteraction(Uri uri) {
}
private void replaceFragment(Fragment fragment){
FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
ft.replace(R.id.postPage,fragment);
ft.addToBackStack(null);
ft.commit();
}
}
main.xml (Menu XML file)
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
>
<item
android:id="#+id/search"
android:title="Search"
android:orderInCategory="100"
android:icon="#drawable/ic_action_action_search"
android:iconTint="#fff"
app:showAsAction="ifRoom"
app:actionViewClass="androidx.appcompat.widget.SearchView"
android:visible="false"
>
</item>
<item
android:id="#+id/searchPosts"
android:title="Search"
android:orderInCategory="100"
android:icon="#drawable/ic_action_action_search"
android:iconTint="#fff"
app:showAsAction="ifRoom"
app:actionViewClass="androidx.appcompat.widget.SearchView"
>
</item>
<item
android:id="#+id/notificationSettings"
android:icon="#drawable/baseline_settings_applications_white_18dp"
android:orderInCategory="100"
android:title="Settings"
app:showAsAction="ifRoom">
</item>
<item
android:id="#+id/LogOut"
android:orderInCategory="100"
android:title="Log Out"
app:showAsAction="never" />
<item
android:id="#+id/settings"
android:title="My Profile! "
>
</item>
<item
android:id="#+id/users"
android:title="All users"
>
</item>
</menu>

Fragment button causes backstack error

I am trying to create an app that will get some information from a server, using volley. You should enter your info in, and then click login at the bottom, but for somereason it keeps crashing.
First and foremost when the button is clicked, it crashes and the logcat is:
https://pastebin.com/deQi874r
Main Activity code:
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar)findViewById(R.id.my_toolbar);
setSupportActionBar(toolbar);
TextView textView = (TextView)findViewById(R.id.currentFragDisplay);
textView.setText("My Profile");
FragmentManager fragmentManager = getSupportFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.add(R.id.fragmentContainer, new Personal_Profile_Fragment());
fragmentTransaction.commit();
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.toolbar_menu, menu);
return true;
}
#Override
public boolean onPrepareOptionsMenu(Menu menu) {
super.onPrepareOptionsMenu(menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int item_id = item.getItemId();
switch (item_id) {
case R.id.accDetails:
swapFragment(item_id);
return true;
case R.id.personalProfileLookup:
swapFragment(item_id);
return true;
case R.id.favoriteCharacters:
swapFragment(item_id);
return true;
case R.id.friendProfileLookup:
swapFragment(item_id);
return true;
case R.id.tipsAndTricks:
swapFragment(item_id);
return true;
}
return false;
}
private void swapFragment(int fragmentID){
TextView tracker = (TextView) findViewById(R.id.currentFragDisplay);
Fragment fragment = null;
if(fragmentID == R.id.personalProfileLookup) {
tracker.setText("My Profile");
fragment = new Personal_Profile_Fragment();
} else if(fragmentID == R.id.favoriteCharacters) {
tracker.setText("Favorite Characters");
fragment = new Favorite_Characters_Fragment();
} else if(fragmentID == R.id.friendProfileLookup) {
tracker.setText("Friend Lookup");
fragment = new Friend_Profile_Fragment();
} else if(fragmentID == R.id.tipsAndTricks) {
tracker.setText("Tips and Tricks");
fragment = new TipsandTricks_Fragment();
} else if(fragmentID == R.id.accDetails) {
tracker.setText("Log In");
fragment = new loginFragment();
}
FragmentManager fragmentManager = getSupportFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.replace(R.id.fragmentContainer, fragment);
fragmentTransaction.addToBackStack(null);
fragmentTransaction.commit();
}
#Override
public void onBackPressed() {
if (getFragmentManager().getBackStackEntryCount() > 0) {
getFragmentManager().popBackStack();
} else {
super.onBackPressed();
}
}
}
login fragment(where button is):
public class loginFragment extends Fragment {
//Local Vars
private boolean loginCheck = false;
//required constructor
public loginFragment() {
// Required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_login, container, false);
Button button = (Button) view.findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener()
{
#Override
public void onClick(View v)
{
login(v);
}
});
// Inflate the layout for this fragment
return view;
}
public boolean isLoggedIn() {
return loginCheck;
}
private void login(View v){
Toast.makeText(getActivity(),"Clicked",Toast.LENGTH_LONG).show();
String username;
String password;
username = v.findViewById(R.id.enteredUsername).toString();
password = v.findViewById(R.id.enteredPassword).toString();
final ArrayList<String> info = new ArrayList<>();
String[] unameSeparated = new String[username.length()];
unameSeparated = username.split("(?!^)");
String startUrl = "https://us.api.battle.net/d3/profile/";
String uname = "";
String APIKey = "/?locale=en_US&apikey=6nguxckrzchn86q9792jvdhww4uxf32v";
//Separating the username into the parts needed for sending request
for (int i = 0; i < unameSeparated.length; i++) {
if ((unameSeparated[i].equals("#"))) {
//Replacing # with '%23'
uname += "%23";
} else {
uname += unameSeparated[i];
}
}
String url = startUrl + uname+ APIKey;
// Instantiate the RequestQueue.
RequestQueue queue = Volley.newRequestQueue(getActivity());
// Request a string response from the provided URL.
StringRequest stringRequest = new StringRequest(Request.Method.GET, url,
new Response.Listener<String>() {
#Override
public void onResponse(String response) {
info.add(response);
Toast.makeText(getActivity(),"Request Success",Toast.LENGTH_LONG).show();
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(getActivity(),"Request FAIL",Toast.LENGTH_LONG).show();
}
});
// Add the request to the RequestQueue.
queue.add(stringRequest);
}
}

The problem is with you login click. You are passing the button and not the view in
login(v);
The V you are passing is an instance of the button not the view. So this
username = v.findViewById(R.id.enteredUsername).toString();
password = v.findViewById(R.id.enteredPassword).toString();
would be refering to a null pointer. Hope this helps

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/

hamburger is not working when i click. i have to drag for menu

This is the main activity where I have implemented the drawer and toolbar. I have tried all possible solutions on stack. I have not used the hamburger image
I created the navigation view and added it in my xml:
public class NavigationMenu extends AppCompatActivity {
DrawerLayout drawerLayout;
Toolbar toolbar;
ActionBarDrawerToggle actionBarDrawerToggle;
FragmentTransaction fragmentTransaction;
NavigationView navigationView;
RoundImage roundedImage;
ImageView profileImage;
TextView uname,mail;
private SQLiteHandler db;
private SessionManager session;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_navigation_menu);
toolbar = (Toolbar)findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
/* Setting drawer in menu*/
drawerLayout = (DrawerLayout)findViewById(R.id.drawer_layout);
actionBarDrawerToggle = new ActionBarDrawerToggle(this,drawerLayout,R.string.drawer_open,R.string.drawer_close);
drawerLayout.setDrawerListener(actionBarDrawerToggle);
actionBarDrawerToggle.setDrawerIndicatorEnabled(true);
actionBarDrawerToggle.syncState();
fragmentTransaction = getSupportFragmentManager().beginTransaction();
fragmentTransaction.add(R.id.main_container,new HomeFragment());
fragmentTransaction.commit();
/* Accessing database getApplicationContext( */
db = new SQLiteHandler(this);
HashMap<String,String> user = db.getUserDetails();
String id = user.get("id");
String name = user.get("name");
String email = user.get("email");
Log.d("Soulsystem", name);
Log.d("Soulsystem", email);
/*Access navigation header here to set name and to call the attributes of header*/
NavigationView navigationView = (NavigationView)findViewById(R.id.navigation_view);
View header = navigationView.getHeaderView(0);
uname = (TextView)header.findViewById(R.id.rahul);
uname.setText(name);
AppController.getInstance().setClientConsultancyDetails(id,name,email);
profileImage = (ImageView)header.findViewById(R.id.navigation_view_Image);
profileImage.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
profile();
}
});
// session manager
session = new SessionManager(getApplicationContext());
if (!session.isLoggedIn()) {
logoutUser();
}
navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
#Override
public boolean onNavigationItemSelected(MenuItem item) {
switch (item.getItemId()){
case R.id.contact:
contact();
break;
case R.id.logout:
logoutUser();
/* item.setChecked(true);
drawerLayout.closeDrawers();*/
break;
}
return true;
}
});
}
protected void onPostCreate(#Nullable Bundle savedInstanceState) {
actionBarDrawerToggle.syncState();
super.onPostCreate(savedInstanceState);
}
private void logoutUser() {
session.setLogin(false);
db.deleteUsers();
Intent intent = new Intent(NavigationMenu.this, MainActivity.class);
startActivity(intent);
}
//call to Profile image fragment
private void profile(){
Log.d("NavigationMenu", "In profile Image view");
fragmentTransaction = getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.main_container, new ClientProfile());
fragmentTransaction.commit();
drawerLayout.closeDrawers();
}
//call to Contact image fragment
private void contact(){
Log.d("NavigationMenu", "In profile Image view");
fragmentTransaction = getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.main_container, new Contact());
fragmentTransaction.commit();
drawerLayout.closeDrawers();
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.drawe_menu, menu);
return false;
}
#Override
public boolean onPrepareOptionsMenu(Menu menu) {
MenuItem item= menu.findItem(R.menu.drawe_menu);
item.setVisible(false);
super.onPrepareOptionsMenu(menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
if (actionBarDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
return super.onOptionsItemSelected(item);
}
}

Try listening to toolbar
toolbar.setNavigationOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v)
drawerLayout.openDrawer(GravityCompat.START);
}
}
});

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...