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Saving State In Fragment With ViewPager Android Studio

Need a little help on how to approach saving state in my single activity application. I looked at a few resources but couldn't quite find one that fits the build. Essentially I have single activity with a Fragment container view that I'm using to swap out fragments as needed. My issue is that as my activity is destroyed when a lifecycle event occurs, the fragment with my view pager is restored but the individual fragments on the tabs are not loaded. I cannot figure out how to save the state properly. Below is my code:
Activity:
public class StartActivity extends AppCompatActivity {
FirebaseAuth mAuth;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_start);
mAuth = FirebaseAuth.getInstance();
if (savedInstanceState == null) {
LoginFragment fragment = new LoginFragment();
getSupportFragmentManager()
.beginTransaction()
.add(R.id.frameLayout, fragment)
.commit();
}
}
#Override
public void onStart() {
super.onStart();
FirebaseUser currentUser = mAuth.getCurrentUser();
if(currentUser != null){
MainActivity mainActivityFrag = new MainActivity();
getSupportFragmentManager()
.beginTransaction()
.add(R.id.frameLayout, mainActivityFrag)
.commit();
}
}
#Override
public void onSaveInstanceState(#NonNull Bundle outState, #NonNull PersistableBundle outPersistentState) {
super.onSaveInstanceState(outState, outPersistentState);
}
#Override
protected void onRestoreInstanceState(#NonNull Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
}
}
Fragment With View Pager:
public class MainActivity extends Fragment {
private FirebaseAuth mAuth;
private SectionsPagerAdapter sectionsPagerAdapter;
private ViewPager viewPager;
private TabLayout tabs;
private Toolbar toolbar;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mAuth = mAuth = FirebaseAuth.getInstance();
}
#Nullable
#Override
public View onCreateView(#NonNull LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.activity_main, container, false);
sectionsPagerAdapter = new SectionsPagerAdapter(getContext(),((AppCompatActivity)getActivity()).getSupportFragmentManager());
viewPager = view.findViewById(R.id.view_pager);
viewPager.setAdapter(sectionsPagerAdapter);
tabs = view.findViewById(R.id.tabs);
tabs.setupWithViewPager(viewPager);
tabs.showContextMenu();
toolbar = view.findViewById(R.id.topAppBar);
((AppCompatActivity)getActivity()).setSupportActionBar(toolbar);
((AppCompatActivity)getActivity()).getSupportActionBar().setDisplayShowTitleEnabled(false);
setHasOptionsMenu(true);
tabs.getTabAt(0).setIcon(R.drawable.home_selector);
tabs.getTabAt(1).setIcon(R.drawable.destination);
tabs.getTabAt(2).setIcon(R.drawable.mail_outline_blk);
tabs.getTabAt(3).setIcon(R.drawable.notification_bell);
return view;
}
#Override
public void onCreateOptionsMenu(#NonNull Menu menu, #NonNull MenuInflater inflater) {
super.onCreateOptionsMenu(menu, inflater);
menu.clear();
inflater.inflate(R.menu.main_menu, menu);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
super.onOptionsItemSelected(item);
switch (item.getItemId()){
case R.id.logout:
mAuth.signOut();
//navigate to home fragment
LoginFragment fragment = new LoginFragment();
((AppCompatActivity)getActivity()).getSupportFragmentManager()
.beginTransaction()
.replace(R.id.frameLayout, fragment)
.commit();
return true;
default:
return false;
}
}
#Override
public void onResume() {
super.onResume();
}
#Override
public void onSaveInstanceState(#NonNull Bundle outState) {
super.onSaveInstanceState(outState);
}
}
Adapter Code:
public class SectionsPagerAdapter extends FragmentPagerAdapter {
#StringRes
private static final int[] TAB_TITLES = new int[]{R.string.tab_text_1, R.string.tab_text_2, R.string.tab_text_3, R.string.tab_text_4};
private final Context mContext;
public SectionsPagerAdapter(Context context, FragmentManager fm) {
super(fm, BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT);
mContext = context;
}
#Override
public Fragment getItem(int position) {
// getItem is called to instantiate the fragment for the given page.
// Return a PlaceholderFragment (defined as a static inner class below).
switch (position){
case 0:
PostFragment postFragment = new PostFragment();
return postFragment;
case 1:
TestFragment userFeedFragmentt = new TestFragment();
return userFeedFragmentt;
default:
TestFragment userFeedFragmenttt = new TestFragment();
return userFeedFragmenttt;
}
}
#Nullable
#Override
public CharSequence getPageTitle(int position) {
return mContext.getResources().getString(TAB_TITLES[position]);
}
#Override
public int getCount() {
// Show 2 total pages.
return 4;
}
}

What is going on with my Android Navigation drawer activity?

I am building an OpenGL live wallpaper. I decided to have a Navigation Drawer in my main activity since there are a lot of features the user will have access to.
The problem/issue
If I press the "hardware" back button to normally close an app the initial fragment that is shown just refreshes and the app never closes. If I hit the home button and go back to the app everything is a black screen. I've searched all throughout Google thinking that maybe I wasn't destroying the MainActivity properly or for a way to terminate a fragment. I've tried calling finish() in the main activity's onDestroy method. I've tried utilizing the remove method from fragment manager in each fragments onDetach method per posts that I've found online. Nothing has worked. I'm stumped. I've set debug points in the main activity on the onDestroy method and on the fragments onDetach method with no error being produced or any information being given. At this point I am clueless. Here's my MainActivity class.
public class MainActivity extends AppCompatActivity implements OnNavigationItemSelectedListener, OnPostSelectedListener{
FragmentManager mFragmentManager;
FragmentTransaction mFragmentTransaction;
TextView usrTag, tagrEmail;
CircleImageView tagrPic;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
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.setDrawerListener(toggle);
toggle.syncState();
mFragmentManager = getSupportFragmentManager();
mFragmentTransaction = mFragmentManager.beginTransaction();
mFragmentTransaction.add(R.id.cLMain, new PreviewFragment()).addToBackStack("PreviewFragment").commit();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
View header = navigationView.getHeaderView(0);
usrTag = (TextView)header.findViewById(R.id.usrName);
tagrEmail = (TextView)header.findViewById(R.id.usrEmail);
tagrPic = (CircleImageView)header.findViewById(R.id.usrImg);
Log.i("MainActivity: ", "User Photo: " + getProfilePic(this));
usrTag.setText(getUserName(getBaseContext()));
tagrEmail.setText(getUserEmail(getBaseContext()));
GlideUtils.loadProfileIcon(getProfilePic(getBaseContext()), tagrPic);
}
#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();
//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 fragment = null;
Class fragmentClass = null;
int id = item.getItemId();
if (id == R.id.nav_home) {
fragmentClass = PreviewFragment.class;
} else if (id == R.id.nav_custom) {
startCustomLabelCreator();
} else if (id == R.id.nav_mylabels) {
} else if (id == R.id.nav_commLabels) {
fragmentClass = PostsFragment.class;
} else if (id == R.id.nav_share) {
} else if (id == R.id.nav_send) {
}
try {
fragment = (Fragment) fragmentClass.newInstance();
} catch (Exception e) {
e.printStackTrace();
}
// Insert the fragment by replacing any existing fragment
FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction().replace(R.id.cLMain, fragment).commit();
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
public void startCustomLabelCreator(){
Intent cLC = new Intent(getBaseContext(), CreateLabel.class);
startActivity(cLC);
}
#Override
public void onPostComment(String postKey) {
}
#Override
public void onPostLike(String postKey) {
}
#Override
public void onPhotoSelected(String photoUrl) {
}
#Override
protected void onDestroy() {
super.onDestroy();
finish();
}
}
My Fragments
public class PostsFragment extends Fragment implements ConfirmSelectedPhotoListener{
public static final String TAG = "PostsFragment";
private static final String KEY_LAYOUT_POSITION = "layoutPosition";
private int mRecyclerViewPosition = 0;
private OnPostSelectedListener mListener;
private RecyclerView mRecyclerView;
private RecyclerView.Adapter<PostViewHolder> mAdapter;
public PostsFragment() {
// Required empty public constructor
}
public static PostsFragment newInstance() {
PostsFragment fragment = new PostsFragment();
return fragment;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_posts, container, false);
rootView.setTag(TAG);
mRecyclerView = (RecyclerView) rootView.findViewById(R.id.my_recycler_view);
return rootView;
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
LinearLayoutManager linearLayoutManager = new LinearLayoutManager(getActivity());
linearLayoutManager.setReverseLayout(true);
linearLayoutManager.setStackFromEnd(true);
mRecyclerView.setLayoutManager(linearLayoutManager);
Log.d(TAG, "Restoring recycler view position (all): " + mRecyclerViewPosition);
Query allPostsQuery = FirebaseUtil.getPostsRef();
mAdapter = getFirebaseRecyclerAdapter(allPostsQuery);
mAdapter.registerAdapterDataObserver(new RecyclerView.AdapterDataObserver() {
#Override
public void onItemRangeInserted(int positionStart, int itemCount) {
super.onItemRangeInserted(positionStart, itemCount);
// TODO: Refresh feed view.
}
});
mRecyclerView.setAdapter(mAdapter);
}
private FirebaseRecyclerAdapter<Post, PostViewHolder> getFirebaseRecyclerAdapter(Query query) {
return new FirebaseRecyclerAdapter<Post, PostViewHolder>(
Post.class, R.layout.post_item, PostViewHolder.class, query) {
#Override
public void populateViewHolder(final PostViewHolder postViewHolder,
final Post post, final int position) {
setupPost(postViewHolder, post, position, null);
}
#Override
public void onViewRecycled(PostViewHolder holder) {
super.onViewRecycled(holder);
// FirebaseUtil.getLikesRef().child(holder.mPostKey).removeEventListener(holder.mLikeListener);
}
};
}
private void setupPost(final PostViewHolder postViewHolder, final Post post, final int position, final String inPostKey) {
postViewHolder.setPhoto(post.getThumb_url());
Log.d(TAG, post.getThumb_url());
postViewHolder.setText(post.getText());
postViewHolder.setTimestamp(DateUtils.getRelativeTimeSpanString(
(long) post.getTimestamp()).toString());
final String postKey;
if (mAdapter instanceof FirebaseRecyclerAdapter) {
postKey = ((FirebaseRecyclerAdapter) mAdapter).getRef(position).getKey();
} else {
postKey = inPostKey;
}
Author author = post.getAuthor();
postViewHolder.setAuthor(author.getFull_name(), author.getUid());
postViewHolder.setIcon(author.getProfile_picture(), author.getUid());
ValueEventListener likeListener = new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot dataSnapshot) {
postViewHolder.setNumLikes(dataSnapshot.getChildrenCount());
if (dataSnapshot.hasChild(FirebaseUtil.getCurrentUserId())) {
postViewHolder.setLikeStatus(PostViewHolder.LikeStatus.LIKED, getActivity());
} else {
postViewHolder.setLikeStatus(PostViewHolder.LikeStatus.NOT_LIKED, getActivity());
}
}
#Override
public void onCancelled(DatabaseError databaseError) {
}
};
FirebaseUtil.getLikesRef().child(postKey).addValueEventListener(likeListener);
postViewHolder.mLikeListener = likeListener;
postViewHolder.setPostClickListener(new PostViewHolder.PostClickListener() {
#Override
public void showComments() {
Log.d(TAG, "Comment position: " + position);
mListener.onPostComment(postKey);
}
#Override
public void toggleLike() {
Log.d(TAG, "Like position: " + position);
mListener.onPostLike(postKey);
}
#Override
public void savePhotoUrl() {
//mListener.onPhotoSelected(post.getFull_url());
showLabelConfirm(post.getFull_url());
}
});
}
#Override
public void onDestroy() {
super.onDestroy();
if (mAdapter != null && mAdapter instanceof FirebaseRecyclerAdapter) {
((FirebaseRecyclerAdapter) mAdapter).cleanup();
}
}
#Override
public void onSaveInstanceState(Bundle savedInstanceState) {
// Save currently selected layout manager.
int recyclerViewScrollPosition = getRecyclerViewScrollPosition();
Log.d(TAG, "Recycler view scroll position: " + recyclerViewScrollPosition);
savedInstanceState.putSerializable(KEY_LAYOUT_POSITION, recyclerViewScrollPosition);
super.onSaveInstanceState(savedInstanceState);
}
private int getRecyclerViewScrollPosition() {
int scrollPosition = 0;
// TODO: Is null check necessary?
if (mRecyclerView != null && mRecyclerView.getLayoutManager() != null) {
scrollPosition = ((LinearLayoutManager) mRecyclerView.getLayoutManager())
.findFirstCompletelyVisibleItemPosition();
}
return scrollPosition;
}
#Override
public void onSelectedPhoto(String selectPhoto) {
mListener.onPhotoSelected(selectPhoto);
}
public interface OnPostSelectedListener {
void onPostComment(String postKey);
void onPostLike(String postKey);
void onPhotoSelected(String photoUrl);
}
private void showLabelConfirm(String uriBmp) {
FragmentManager fm = getFragmentManager();
PhotoDialogFragment editNameDialogFragment = PhotoDialogFragment.newInstance(uriBmp);
// SETS the target fragment for use later when sending results
editNameDialogFragment.setTargetFragment(PostsFragment.this, 300);
editNameDialogFragment.show(fm, "fragment_edit_name");
}
#Override
public void onAttach(Context context) {
super.onAttach(context);
if (context instanceof OnPostSelectedListener) {
mListener = (OnPostSelectedListener) context;
} else {
throw new RuntimeException(context.toString()
+ " must implement OnPostSelectedListener");
}
}
#Override
public void onDetach() {
super.onDetach();
mListener = null;
}
}
Second Fragment:
public class PreviewFragment extends RajBaseFragment {
#Override
public ISurfaceRenderer createRenderer() {
return new PreviewRenderer(getContext());
}
}
Which extends:
public abstract class RajBaseFragment extends Fragment implements IDisplay, View.OnClickListener {
protected FrameLayout mLayout;
protected ISurface mRajawaliSurface;
protected ISurfaceRenderer mRenderer;
public RajBaseFragment(){
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
super.onCreateView(inflater, container, savedInstanceState);
// Inflate the view
mLayout = (FrameLayout) inflater.inflate(getLayoutID(), container, false);
mLayout.findViewById(R.id.relative_layout_loader_container).bringToFront();
// Find the TextureView
mRajawaliSurface = (ISurface) mLayout.findViewById(R.id.rajwali_surface);
// Create the loader
mRenderer = createRenderer();
onBeforeApplyRenderer();
applyRenderer();
return mLayout;
}
protected void onBeforeApplyRenderer() {
}
protected void applyRenderer() {
mRajawaliSurface.setSurfaceRenderer(mRenderer);
}
#Override
public void onClick(View v) {
}
#Override
public void onDestroyView() {
super.onDestroyView();
if (mLayout != null)
mLayout.removeView((View) mRajawaliSurface);
}
#Override
public int getLayoutID() {
return R.layout.rajawali_textureview_fragment;
}
}
I've tried all the recommendations below so far and the primary fragment that is set in the MainActivity's onCreate method still gets refreshed/reloaded when the back button is pressed rather than the app exiting/closing.

In your onNavigationItemSelected method, you are replacing the current fragment with fragment even in cases where fragment is null, which has undefined effects. You should not do that.
One fix is to replace this code block:
try {
fragment = (Fragment) fragmentClass.newInstance();
} catch (Exception e) {
e.printStackTrace();
}
with this one:
if (fragmentClass != null) {
fragment = fragmentClass.newInstance();
FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction().replace(R.id.cLMain, fragment).addToBackStack().commit();
}
(and then leave out the fragment transaction below this point).
Also, there is a call to finish in the onDestroy method, which probably is not causing the problem but should be taken out because it does not make any sense there.

#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
onBackPressed();
break;
}
return true;
}
replace your onOptionsItemSelected() with mine.

Don't include your first fragment into backstack.
Try to change you fragment transaction line code without addToBackStack
as below:
mFragmentTransaction.add(R.id.cLMain, new PreviewFragment()).commit();
While adding fragment with addToBackStack, this allows back
navigation for added fragment.Because of fragment in backstack,
empty(black) activity layout will be displayed.
Change onBackPressed() as below which automatically close app after if no any Fragment found in FragmentManager:
#Override
public void onBackPressed() {
if (getSupportFragmentManager().getBackStackEntryCount() == 0) {
this.finish();
} else {
getSupportFragmentManager().popBackStack();
}
}
Also you can see some similar Q/A on below links which helps you get more idea to solve your problem:
Fragment pressing back button
In Fragment on back button pressed Activity is blank
Transaction of fragments in android results in blank screen
It's solved my blank screen problem. Hope its helps you.

Try this code, hope this helps you, take necessary stuffs which are required for you. Also, try running this project in Android studio, it works.
https://github.com/asifali22/Navigation_Health/blob/master/app/src/main/java/com/thenewboston/mynavigation/MainActivity.java

When user press to back button it'll check fragment manager's backstack and if backstack entity count is bigger than 0 (this means there's a fragment in backstack) it'll popBackStack else it'll finish activity.
If you add your initial fragment to backstack, when user press back button they'll see a blank screen.
Also when you init your activity if you need to put a fragment it's a best practice to check if saved instance state is null. Here i modified some part of your code.
if(savedInstanceState == null){
mFragmentManager = getSupportFragmentManager();
mFragmentTransaction = mFragmentManager.beginTransaction();
mFragmentTransaction.add(R.id.cLMain, new PreviewFragment()).commit();
}
I hope this'll help you. If you still have problem let me know.
Good luck.

create subclass for ISurface and override onKeyDown method like this
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
Log.e("Custom View", "onKeyDown");
//return super.onKeyDown(keyCode, event);
return false;
}

Could be related with the lifecycle...
Try using GLSurfaceView. I believe is easier for what you want, is special for OpenGL rendering and there is plenty information about it. Examples, lifecycle among others. Let me know if helped. If not, please, provide more info.

How to close the navigation drawer when an Item of ListView is selected?

I know that this question is asked many times but we have different situation. Regarding the project I downloaded the project navigation drawer demo from GitHub.com. Provided the code below:
this is the main activity:
package edu.ejapp.dotalegitstore;
#SuppressLint("NewApi")
public class MainActivity extends BaseActivity {
FragmentStackManager fm,sliding_menu;
private Context context;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
context=this;
setUpView();
menuToggeleSetUp(savedInstanceState);
}
void setUpView(){
fm = new FragmentStackManager(this);
sliding_menu = new FragmentStackManager(this);
drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
fm.addFragment(new MainFragment(), R.id.main_frame, false, FragmentTransaction.TRANSIT_NONE, false);
sliding_menu.addFragment(new SlidingMenuFragment(), R.id.slide_fragment, false, FragmentTransaction.TRANSIT_NONE, false);
}
void menuToggeleSetUp(Bundle savedInstanceState){
mDrawerToggle = new ActionBarDrawerToggle(this, drawer,
R.drawable.ic_drawer, // nav menu toggle icon
R.string.app_name
) {
#SuppressLint("NewApi")
public void onDrawerClosed(View view) {
getSupportActionBar().setTitle(mTitle);
// calling onPrepareOptionsMenu() to show action bar icons
invalidateOptionsMenu();
}
public void onDrawerOpened(View drawerView) {
getSupportActionBar().setTitle(mDrawerTitle);
// calling onPrepareOptionsMenu() to hide action bar icons
invalidateOptionsMenu();
}
};
drawer.setDrawerListener(mDrawerToggle);
if (savedInstanceState == null) {
// on first time display view for first nav item
}
}
#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
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
// Sync the toggle state after onRestoreInstanceState has occurred.
mDrawerToggle.syncState();
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (mDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
if (id == R.id.action_settings) {
return true;
}
else if (id == R.id.action_exit) {
final AlertDialog.Builder dialog = new AlertDialog.Builder(context);
dialog.setTitle("COnfirm exit");
dialog.setMessage("Are you sure you want to exit?");
dialog.setPositiveButton("No", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
dialog.dismiss();
}
});
dialog.setNegativeButton("Yes", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
finish();
}
});
AlertDialog alertDialog = dialog.create();
alertDialog.show();
}
else if (id == R.id.action_login) {
startActivity(new Intent(MainActivity.this, LoginActivity.class));
}
else {
}
return super.onOptionsItemSelected(item);
}
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
// Pass any configuration change to the drawer toggls
mDrawerToggle.onConfigurationChanged(newConfig);
}
}
The base activity extended by MainActivity:
package edu.ejapp.dotalegitstore;
import android.graphics.drawable.ColorDrawable;
import android.os.Bundle;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBarDrawerToggle;
#SuppressWarnings("deprecation")
public class BaseActivity extends ActionBarActivity{
public ActionBarDrawerToggle mDrawerToggle;
public DrawerLayout drawer;
CharSequence mDrawerTitle;
CharSequence mTitle;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setActionBar();
}
public void setActionBar(){
getSupportActionBar().setTitle("");
getSupportActionBar().setBackgroundDrawable(new ColorDrawable(this.getResources().getColor(R.color.app_main)));
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
}
}
and lastly the sliding fragment activity, here the on item click is implemented not in baseactivity or main which is the reason of my problem: i cant close the drawer when i clicked item on the drawer:
public class SlidingMenuFragment extends Fragment {
List<String> data;
ListView list_view;
SlidingMenuListAdapter adapter;
#SuppressLint("InflateParams")
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {
ViewGroup root = (ViewGroup) inflater.inflate(R.layout.fragment_sliding_menu, null);
setUpView(root);
return root;
}
void setUpView(ViewGroup root){
list_view = (ListView)root.findViewById(R.id.list_view);
initList();
setUpClick();
}
void initList(){
data = new ArrayList<String>();
data.add("Home");
data.add("Arcana");
data.add("Courrier");
data.add("Hero Sets");
data.add("Immortals");
adapter = new SlidingMenuListAdapter(getActivity(),data);
list_view.setAdapter(adapter);
}
void setUpClick(){
list_view.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Toast.makeText(getActivity(),"Hi "+position,Toast.LENGTH_SHORT).show();
}
});
}
}
I didnt include the other files such as the xmls. My question is:
How can I close the drawer when I clicked item of the list view provided that the onitemclick is defined in SlidingMenuFragment class and the mDrawerlayout is located in BaseActivity class which is extended by MainActivity class?

create a method to close drawer in your main activity and call it from fragment.
public static void closeDrawer(){
if(drawerLayout.isDrawerOpen(leftDrawerList)){
drawerLayout.closeDrawer(leftDrawerList);
}
}
Inside Fragment
MainActivity.closeDrawer();

here is my suggestion：
provide an interface in SlidingMenuFragment like:
public class SlidingMenuFragment extends Fragment {
private OnListItemClickListener mOnListItemClickListener;
//here is mOnListItemClickListener getter and setter method
public *** set(get)OnListItemClickListener(){};
//define a interface here
public interface OnListItemClickListener{
public void onListenItemClick();
}
.
.
.
void setUpClick(){
list_view.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
if(mOnListItemClickListener != null){
mOnListItemClickListener.onListenItemClick();
}
}
});
}
}
and then you should implement this interface in your MainActivity class like:
public class MainActivity extends BaseActivity {
void setUpView(){
fm = new FragmentStackManager(this);
sliding_menu = new FragmentStackManager(this);
drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
fm.addFragment(new MainFragment(), R.id.main_frame, false, FragmentTransaction.TRANSIT_NONE, false);
SlidingMenuFragment smFragment = new SlidingMenuFragment()
smFragment.setMonListItemClickListener(new OnListItemClickListener(){
public void onListenItemClick(){
drawer.close();
}
});
sliding_menu.addFragment(smFragment, R.id.slide_fragment, false, FragmentTransaction.TRANSIT_NONE, false);
}
}`

Activity is not an enclosing class in Android Studio

I am New to Android. I Have Created Tab using android.support.v4.view.ViewPager. When i trying to get data from server using Json Request it give me the Error
AccountActivity is not an enclosing class.
please Any Help will be Appreciated
TAb1.java
public class Tab1 extends Fragment {
private ProgressDialog pDialog;
private UserAddress userAddress;
private TextView txtResponsec;
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
new LoadUserAddress().execute();
}
class LoadUserAddress extends AsyncTask<String,String,String> {
private ProgressDialog progressDialog;
#Override
protected String doInBackground(String... params) {
try {
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
JSONHttpClient jsonHttpClient = new JSONHttpClient();
userAddress = jsonHttpClient.Get(ServiceUrl.UserAddress, nameValuePairs, UserAddress.class);
String id = userAddress.GetId();
}
catch (Exception ex){
String message = ex.getMessage();
}
return null;
}
#Override
protected void onPreExecute() {
super.onPreExecute(); //To change body of overridden methods use File | Settings | File Templates.
progressDialog = new ProgressDialog(AccountActivity.this);
progressDialog.setMessage("Loading products. Please wait...");
progressDialog.show();
}
#Override
protected void onPostExecute(String s) {
progressDialog.dismiss();
getActivity().runOnUiThread(new Runnable() {
#Override
public void run() {
txtResponsec.setText(userAddress.GetCountry());
}
});
}
}
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View v =inflater.inflate(R.layout.tab_1,container,false);
return v;
}
}
AccountActivity.java
public class AccountActivity extends AppCompatActivity {
Toolbar toolbar;
ActionBar actionBar;
ViewPager pager;
ViewPagerAdapter adapter;
SlidingTabLayout tabs;
CharSequence Titles[]={"Info.","Address","Contact","Email"};
int Numboftabs =4;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_account);
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
assert getSupportActionBar() != null;
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
if (toolbar != null) {
toolbar.setNavigationOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
onBackPressed();
}
});
}
adapter = new ViewPagerAdapter(getSupportFragmentManager(),Titles,Numboftabs);
// Assigning ViewPager View and setting the adapter
pager = (ViewPager) findViewById(R.id.pager);
pager.setAdapter(adapter);
// Assiging the Sliding Tab Layout View
tabs = (SlidingTabLayout) findViewById(R.id.tabs);
tabs.setDistributeEvenly(true); // To make the Tabs Fixed set this true, This makes the tabs Space Evenly in Available width
// Setting Custom Color for the Scroll bar indicator of the Tab View
tabs.setCustomTabColorizer(new SlidingTabLayout.TabColorizer() {
#Override
public int getIndicatorColor(int position) {
return getResources().getColor(R.color.tabsScrollColor);
}
});
// Setting the ViewPager For the SlidingTabsLayout
tabs.setViewPager(pager);
}
#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_account, 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);
}
}

You should change
progressDialog = new ProgressDialog(AccountActivity.this);
to
progressDialog = new ProgressDialog(getActivity());
in Tab1 Fragment also i see txtResponsec=null you forget to initialized it.
Edit:
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View v =inflater.inflate(R.layout.tab_1,container,false);
txtResponsec=(TextView)v.findViewById(R.id.txtResponsecId);
return v;
}

Going back from a fragment to the previous which have viewpager

I am developing an app which have a single activity and several fragments.
The first fragment contains a viewpager which have 3-4 fragments extra. I can switch from one fragment to another easily and the viewpager works fine, but when i am going back from one fragment to the first(not in viewpager), the viewpager is not loading all fragments. Below is the code:
mainactivity.java
public class MainActivity extends ActionBarActivity implements View.OnClickListener {
private String[] mOptionMenu;
private DrawerLayout mDrawerLayout;
private DrawerLayout loginlayout;
private RelativeLayout mDrawerRelativeLayout;
private ListView mDrawerList;
private ActionBarDrawerToggle mDrawerToggle;
private CharSequence mTitleSection;
private CharSequence mTitleApp;
private Fragment mFragment = null;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button btn1= (Button) findViewById(R.id.button1);
Button btn2= (Button) findViewById(R.id.button2);
Button login= (Button) findViewById(R.id.login);
Button about= (Button) findViewById(R.id.about);
about.setOnClickListener(this);
login.setOnClickListener(this);
btn2.setOnClickListener(this);
btn1.setOnClickListener(this);
FontChangeCrawler fontChanger = new FontChangeCrawler(getAssets(), "fonts/font.ttf");
fontChanger.replaceFonts((ViewGroup)this.findViewById(android.R.id.content));
if (findViewById(R.id.content_frame) != null) {
if (savedInstanceState != null) {
return;
}
FirstFragment firstFragment = new FirstFragment();
firstFragment.setArguments(getIntent().getExtras());
getSupportFragmentManager().beginTransaction().addToBackStack(null)
.add(R.id.content_frame, firstFragment).commit();
}
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
mDrawerRelativeLayout = (RelativeLayout) findViewById(R.id.left_drawer);
mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,
R.drawable.ic_drawer, R.string.drawer_open,
R.string.drawer_close) {
public void onDrawerClosed(View view) {
getSupportActionBar().setTitle(mTitleSection);
ActivityCompat.invalidateOptionsMenu(MainActivity.this);
}
public void onDrawerOpened(View drawerView) {
getSupportActionBar().setTitle(mTitleSection);
ActivityCompat.invalidateOptionsMenu(MainActivity.this);
}
};
mDrawerLayout.setDrawerListener(mDrawerToggle);
getSupportActionBar().setCustomView(R.layout.actionbar_image);
getSupportActionBar().setDisplayOptions(ActionBar.DISPLAY_SHOW_HOME
| ActionBar.DISPLAY_SHOW_CUSTOM);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setDisplayShowTitleEnabled(false);
getSupportActionBar().setHomeButtonEnabled(true);
getSupportActionBar().setBackgroundDrawable(new ColorDrawable(Color.parseColor("#662e91")));
mDrawerLayout.setDrawerListener(new DrawerLayout.DrawerListener() {
#Override
public void onDrawerSlide(View drawerView, float slideOffset) {
}
#Override
public void onDrawerOpened(View drawerView) {
}
#Override
public void onDrawerClosed(View drawerView) {
}
#Override
public void onDrawerStateChanged(int newState) {
}
});
}
#Override
public void onClick(View v) {
switch(v.getId())
{
case R.id.button1:
FirstFragment firstFragment = new FirstFragment();
getSupportFragmentManager().beginTransaction().replace(R.id.content_frame, new FirstFragment()).commit();
mDrawerLayout.closeDrawer(Gravity.LEFT);
break;
case R.id.login:
callLoginDialog();
break;
case R.id.about:
about abt = new about();
abt.setArguments(getIntent().getExtras());
getSupportFragmentManager().beginTransaction()
.add(R.id.content_frame, abt).commit();
mDrawerLayout.closeDrawer(Gravity.LEFT);
break;
}
}
public class FontChangeCrawler
{
private Typeface typeface;
public FontChangeCrawler(Typeface typeface)
{
this.typeface = typeface;
}
public FontChangeCrawler(AssetManager assets, String assetsFontFileName)
{
typeface = Typeface.createFromAsset(assets, "fonts/font.ttf");
}
public void replaceFonts(ViewGroup viewTree)
{
View child;
for(int i = 0; i < viewTree.getChildCount(); ++i)
{
child = viewTree.getChildAt(i);
if(child instanceof ViewGroup)
{
// recursive call
replaceFonts((ViewGroup)child);
}
else if(child instanceof TextView)
{
// base case
((TextView) child).setTypeface(typeface);
}
}
}
}
public void callLoginDialog()
{
Dialog myDialog = new Dialog(this);
myDialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
myDialog.setContentView(R.layout.loginwindow);
myDialog.setCancelable(false);
TextView reg= (TextView) myDialog.findViewById(R.id.register);
Button login = (Button) myDialog.findViewById(R.id.login);
EditText emailaddr = (EditText) myDialog.findViewById(R.id.editText2);
EditText password = (EditText) myDialog.findViewById(R.id.editText3);
myDialog.show();
reg.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(getApplicationContext(), "Register",
Toast.LENGTH_LONG).show();
}
});
login.setOnClickListener(new View.OnClickListener()
{
#Override
public void onClick(View v)
{
//your login calculation goes here
}
});
myDialog.setOnKeyListener(new DialogInterface.OnKeyListener() {
#Override
public boolean onKey(DialogInterface dialog, int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
dialog.cancel();
return true;
}
return false;
}
});
}
#Override
public void onBackPressed() {
if(mDrawerLayout.isDrawerOpen(Gravity.LEFT)) {
mDrawerLayout.closeDrawer(Gravity.LEFT);
}
else {
super.onBackPressed();
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.main, menu);
return super.onCreateOptionsMenu(menu);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
if (mDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
switch (item.getItemId()) {
case R.id.user:
mDrawerLayout.closeDrawer(Gravity.LEFT);
break;
default:
return super.onOptionsItemSelected(item);
}
return true;
}
#Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
mDrawerToggle.syncState();
}
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
mDrawerToggle.onConfigurationChanged(newConfig);
}
}
firstfragment.java
public class FirstFragment extends Fragment {
public ViewPager viewPager;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_first,
container, false);
viewPager = (ViewPager) rootView.findViewById(pager);
viewPager.setAdapter(new ViewPagerAdapter(getFragmentManager()));
viewPager.setCurrentItem(0);
PagerTitleStrip pagerTitleStrip= (PagerTitleStrip) rootView.findViewById(R.id.titlestrip);
pagerTitleStrip.setNonPrimaryAlpha(Float.parseFloat("0.3"));
viewPager.setPageTransformer(true, new ViewPager.PageTransformer() {
#Override
public void transformPage(View view, float position) {
final float normalizedposition = Math.abs(Math.abs(position) - 1);
view.setAlpha(normalizedposition);
}
});
Typeface font = Typeface.createFromAsset(getActivity().getAssets(), "fonts/font.ttf");
for (int counter = 0 ; counter<pagerTitleStrip.getChildCount(); counter++) {
if (pagerTitleStrip.getChildAt(counter) instanceof TextView) {
((TextView)pagerTitleStrip.getChildAt(counter)).setTypeface(font);
}
}
return rootView;
}
}
viewpageadapter.java
public class ViewPagerAdapter extends FragmentPagerAdapter {
final int PAGE_COUNT = 4;
// Tab Titles
private String tabtitles[] = new String[] { "Home", "Men", "Women", "Children" };
Context context;
public ViewPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public int getCount() {
return PAGE_COUNT;
}
#Override
public Fragment getItem(int position) {
switch (position) {
// Open FragmentTab1.java
case 0:
SecondFragment fragmenttab1 = new SecondFragment();
return fragmenttab1;
// Open FragmentTab2.java
case 1:
ThirdFragment fragmenttab2 = new ThirdFragment();
return fragmenttab2;
case 2:
Fourthfragment fragmenttab3 = new Fourthfragment();
return fragmenttab3;
case 3:
FifthFragment fragmenttab4 = new FifthFragment();
return fragmenttab4;
}
return null;
}
#Override
public CharSequence getPageTitle(int position) {
return tabtitles[position];
}
}

Try changing viewPager.setAdapter(new ViewPagerAdapter(getFragmentManager())); with viewPager.setAdapter(new ViewPagerAdapter(getChildFragmentManager()));