Android annotations #afterviews called multiple times when fragment added - android-fragments

I have a fragment that whenever it is added to the layout #afterviews is called.
So for example in the parent activity I check if the fragment has been created, if not inflate it. Then I check if the fragment is added to the layout, if not add it and show the new fragment
#Click(R.id.tvActionFriends)
void friendsClicked() {
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
if (friendsFragment == null) {
friendsFragment = new FriendsFragment_();
}
if (!friendsFragment.isAdded()) {
app.log("not added adding fragment");
fragmentTransaction.add(R.id.layoutMainContainer, friendsFragment);
}
fragmentTransaction.show(friendsFragment);
fragmentTransaction.addToBackStack(null);
fragmentTransaction.commit();
}
The first time its clickd it goes through the lifecycle normally.
So now the user has pressed the back button I can see the teardown onPause() onDestroy() and onDetach()
So now the friendsFragment is removed from the layout but the class still exists.
Now the user clicks on a button again to show the friendsFragment, in the host activity. This time the fragment already exists but is not in layout so it is re added and transaction commits
now the fragment goes through the lifecycle of creation but #afterviews method is triggered twice, if a user hits back again and clicks the button a third time #afterviews will be triggered 3 times etc...
Here is the friendsFragment
#EFragment(R.layout.fragment_friends)
public class FriendsFragment extends BaseFragment {
ArrayList<String> numbers, facebookIds, emails;
ArrayList<Friend> friends;
#Bean
FriendsAdapter friendsAdapter;
#ViewById(R.id.lvFriends)
CustomListView lvFriends;
boolean gettingFriends = false;
#AfterInject
void initInject() {
super.baseInject();
numbers = new ArrayList<String>();
facebookIds = new ArrayList<String>();
friends = new ArrayList<Friend>();
friendsAdapter.setItems(friends);
}
#AfterViews
void initViews() {
super.baseViews();
lvFriends.setAdapter(friendsAdapter);
Cursor phones = getActivity().getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
null, null, null, null);
while (phones.moveToNext()) {
String name = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));
String phoneNumber = phones.getString(phones
.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NORMALIZED_NUMBER));
if (phoneNumber != null) {
phoneNumber = phoneNumber.replace("+", "");
numbers.add(phoneNumber);
}
}
phones.close();
getFriends();
}
OnFriendsListener onFriendsListener = new OnFriendsListener() {
#Override
public void onComplete(List<Profile> friends) {
for (Profile p : friends) {
app.log(p.getName());
}
}
#Override
public void onException(Throwable throwable) {
app.log(throwable.getMessage());
};
#Override
public void onFail(String reason) {
app.log(reason);
}
};
#Background
void getFriends() {
if (gettingFriends == true)
return;
gettingFriends = true;
friends.clear();
MultiValueMap<String, String> data = new LinkedMultiValueMap<String, String>();
data.add("numbers", numbers.toString());
data.add("facebook_ids", facebookIds.toString());
ArrayList<Friend> resp = snapClient.recommendFriends(data);
friendsCallback(resp);
}
#UiThread
void friendsCallback(ArrayList<Friend> resp) {
if (resp != null)
friends.addAll(resp);
friendsAdapter.notifyDataSetChanged();
gettingFriends = false;
}
}
As you can see the fragment extends a basefragment and calls the parent super.baseInject() and super.baseViews() to handle common class fields across all fragments
the base fragment looks like this, it basically just injects a few classes and logs the activity lifecycle of the fragment
#EFragment
public class BaseFragment extends Fragment {
#App
MyApp app;
#SystemService
LayoutInflater layoutInflater;
#Bean
VideoCache videoCache;
#RestService
CloudClient cloudClient;
#Bean
MyResources myResources;
#ViewById(R.id.tvActionExtra)
TextView tvActionExtra;
SnapClient snapClient;
FragmentManager fragmentManager;
SimpleFacebook simpleFacebook;
void baseInject() {
app.log("init inject " + this.getClass().getCanonicalName());
app.currentContext = getActivity();
snapClient = app.snapClient;
}
void baseViews() {
app.log("init views " + this.getClass().getCanonicalName());
}
#Override
public void onAttach(Activity activity) {
Log.d(MyApp.TAG,"attach " + this.getClass().getCanonicalName());
super.onAttach(activity);
if (activity instanceof MainActivity) {
try {
MainActivity a = (MainActivity) activity;
simpleFacebook = a.simpleFacebook;
}
catch (Exception e) {
e.printStackTrace();
}
}
}
void toast(String message) {
app.toast(message);
}
AlertDialog simpleAlert(String title, String message) {
return MyApp.simpleAlert(getActivity(), title, message);
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.d(MyApp.TAG,"create " + this.getClass().getCanonicalName());
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
Log.d(MyApp.TAG,"create view " + this.getClass().getCanonicalName());
return super.onCreateView(inflater, container, savedInstanceState);
}
#Override
public void onPause() {
Log.d(MyApp.TAG,"pause" + this.getClass().getCanonicalName());;
super.onPause();
}
#Override
public void onResume() {
Log.d(MyApp.TAG,"resume " + this.getClass().getCanonicalName());
super.onResume();
}
#Override
public void onDetach() {
Log.d(MyApp.TAG,"detach " + this.getClass().getCanonicalName());
super.onDetach();
}
#Override
public void onDestroy() {
Log.d(MyApp.TAG,"destroy " + this.getClass().getCanonicalName());
super.onDestroy();
}
}
I dont' know if its an android annotation thing im messing up or something with the fragments, any help is appreciated.

It looks like this may be fixed in AndroidAnnotations 3.3?
There was a pull request at https://github.com/excilys/androidannotations/pull/1275, based on an issue at https://github.com/excilys/androidannotations/issues/1264.

Related

How to pass retrofit data in bundle to view pager fragments from activity?

In my activity i am receiving a game id from previous activity and using this id i am getting list of data from api. The method ("ApiCheats") in activity is used to get lis t of data.
I want to pass this list to my fragment in view pager, for this i used bundle but in fragment the bundle is null.
How should i pass bundle list to fragment , this data i am receiving through retrofit.
This is the Activity
public class GameListCheatsActivity extends AppCompatActivity {
private final String TAG = GameListCheatsActivity.class.getSimpleName();
public List<Cheats> Cheats;
ArrayList cheats = new ArrayList<Cheats>();
// public RecyclerView recyclerView;
String Gameid;
ViewPager viewPager;
ViewPagerAdapter adapter;
TabLayout tabLayout ;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_game_list_cheats);
// recyclerView = (RecyclerView) findViewById(R.id.recycler_id);
// LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);
// recyclerView.setLayoutManager(linearLayoutManager);
// recyclerView.setHasFixedSize(true);
Gameid = getIntent().getStringExtra("GameID");
tabLayout = (TabLayout) findViewById(R.id.tab_layout_id);
viewPager = (ViewPager) findViewById(R.id.viewpager_id);
adapter = new ViewPagerAdapter( getSupportFragmentManager());
ApiCheats();
adapter.AddFragment(new Fragment_Cheats(),"GameCheats");
adapter.AddFragment(new Fragment_Favourites(),"Favourites");
viewPager.setAdapter(adapter);
tabLayout.setupWithViewPager(viewPager);
viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
#Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
#Override
public void onPageSelected(int position) {
}
#Override
public void onPageScrollStateChanged(int state) {
if(state == 0){
View inflatedView = getLayoutInflater().inflate(R.layout.cheatitem, null);
}
if(state == 1){
View inflatedView = getLayoutInflater().inflate(R.layout.cheatitem, null);
}
}
});
}
public void ApiCheats()
{
ApiUtil.getServiceClass().getAllCheats(Gameid).enqueue(new Callback<List<Cheats>>() {
#Override
public void onResponse(Call<List<Cheats>> call, Response<List<Cheats>> response) {
if(response != null)
{
if(response.isSuccessful())
{
Cheats = response.body();
Bundle bundle = new Bundle();
bundle.putParcelableArrayList("cheatslist", (ArrayList<? extends Parcelable>) Cheats);
Fragment_Cheats fragment_cheats = new Fragment_Cheats();
fragment_cheats.setArguments(bundle);
}
}
Log.d(TAG, "Returned count " + Cheats.size());
GameListCheatsActivity.this.runOnUiThread(new Runnable() {
#Override
public void run() {
// CheatsAdapter adapter = new CheatsAdapter(getApplicationContext(), Cheats);
// recyclerView.setAdapter(adapter);
}
});
}
#Override
public void onFailure(Call<List<Cheats>> call, Throwable t) {
Log.d(TAG, "error loading from API");
}
});
}
}
this is one of the fragments class
public class Fragment_Cheats extends Fragment {
View v;
private RecyclerView mrecyclerview;
private List<Cheats> lstGameCheats;
public Fragment_Cheats()
{
}
// #Override
// public void onCreate(#Nullable Bundle savedInstanceState) {
// super.onCreate(savedInstanceState);
//
// Bundle bundle = this.getArguments();
// if (bundle != null) {
// lstGameCheats = bundle.getParcelable("cheatslist");
// }
//
// }
#Override
public View onCreateView(#NonNull LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
v = inflater.inflate(R.layout.fragment_fragment__cheats, container, false);
mrecyclerview = (RecyclerView)v.findViewById(R.id.recyclerview_cheats);
Bundle bundle = this.getArguments();
if (bundle != null) {
lstGameCheats = bundle.getParcelable("cheatslist");
}
CheatsAdapter recyclerAdapter = new CheatsAdapter(getContext(),lstGameCheats);
mrecyclerview.setLayoutManager(new LinearLayoutManager(getActivity()));
mrecyclerview.setAdapter(recyclerAdapter);
return v;
}
}
this is view pager adapter
public class ViewPagerAdapter extends FragmentPagerAdapter {
private final List<Fragment> lstFragment = new ArrayList<>();
private final List<String> lstTitles = new ArrayList<>();
public ViewPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
return lstFragment.get(position);
//return null;
}
#Override
public int getCount() {
return lstTitles.size();
//return 0;
}
#Nullable
#Override
public CharSequence getPageTitle(int position) {
return lstTitles.get(position);
}
public void AddFragment(Fragment fragment,String title){
lstFragment.add(fragment);
lstTitles.add(title);
}
}
You should set the Cheats to the Fragment which have added to your ViewPagerAdater, but according to your code you just set the data to a new fragment instance.
According to the Fragment_Cheats code, if you want to invoke getArgument() in onCreate() method, you should invoke fragment.setArgument() before the fragment add to the ViewPagerAdapter.
But in your situation it is not possible, because the data get from the network.
So, two step
Set data to the correct Fragment_Cheats instance
Notify Fragment_Cheats data changed, refresh the View state in the fragment
Replace your onResponse()
#Override
public void onResponse(Call<List<Cheats>> call, Response<List<Cheats>> response) {
if(response != null)
{
if(response.isSuccessful())
{
Cheats = response.body();
Fragment_Cheats fragment_cheats = adapter.getCheatFragment()
fragment_cheats.setDatas(Cheats);
}
}
Log.d(TAG, "Returned count " + Cheats.size());
GameListCheatsActivity.this.runOnUiThread(new Runnable() {
#Override
public void run() {
// CheatsAdapter adapter = new CheatsAdapter(getApplicationContext(), Cheats);
// recyclerView.setAdapter(adapter);
}
});
}
Fragment_Cheats add setDatas() method
public void setDatas(List<Cheats> datas) {
this.lstGameCheats = datas;
// and set the datas to the RecylerView adapter
recyclerviewAdapter.notifyDataSetChanged();
}

Fragment in ViewPager shows nothing while returning from another fragment

I have a ViewPager in the fragment named FragmentHome, and the viewpager contains fragments. Am using FragmentStatePagerAdapter for this. When the fragmentHome loads first the fragments in Viewpager show perfectly. I have another fragment named FragmentCountryList to select a country, according to that country the fragments in the viewpager to be refreshed/updated. Now The problem is after selecting the country, the country fragment is popped and returns to the FragmentHome, but, there nothing is showing in the view pager, if we scrolls the second page(fragment) can be viewed then scrolls back the first page(fragment) can be viewed.
Am new with the FragmentStatePagerAdapter, so i couldn't rectify the reason for this problem. Please Help. The code i used gives below
public class FragmentHome extends WeGrabBaseFragment {
private static String TAG = "FragmentHome";
private HomeDealsDataClass homeDealsDataClass;//1, homeDealsDataClass2;
private ViewPager viewPagerHome;
private ImageView imgViewDealIndicator;
private OnCitySelectedListener onCitySelectedListener;
private FragPageAdapter fragAdapt;
private ArrayList<HomeDealsDataClass> arrayListHomeData;
private FragmentHomeDetails fragmentHomeDetails1,fragmentHomeDetails2;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Activity = (WeGrabBaseActivity) this.getActivity();
}
#Override
public void onResume() {
super.onResume();
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater
.inflate(R.layout.fragment_home, container, false);
((WeGrabMainActivity) Activity).showBottomBar();
((WeGrabMainActivity) Activity).setShowActionBar();
((WeGrabMainActivity) Activity).setHeading(PrefUtil.getCityName(Activity));
((WeGrabMainActivity) Activity).defaultButtonState();
viewPagerHome = (ViewPager) v.findViewById(R.id.viewPagerHome);
viewPagerHome.setOffscreenPageLimit(2);
imgViewDealIndicator = (ImageView) v.findViewById(R.id.imgViewDealIndicator);
Picasso.with(Activity).load(R.drawable.deals1).into(imgViewDealIndicator);
viewPagerHome.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
#Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
if (position == 0) {
Picasso.with(Activity).load(R.drawable.deals1).into(imgViewDealIndicator);
} else if (position == 1) {
Picasso.with(Activity).load(R.drawable.deals2).into(imgViewDealIndicator);
}
}
#Override
public void onPageSelected(int position) {
fragAdapt.notifyDataSetChanged();
}
#Override
public void onPageScrollStateChanged(int state) {
}
});
onCitySelectedListener = new OnCitySelectedListener() {
#Override
public void onCitySelected() {
fetchFromWeb();
}
};
fetchFromWeb();
return v;
}
private void fetchFromWeb() {
if (Activity.isNetworkAvailable()) {
if (VolleyUtils.volleyEnabled) {
Activity.startSpinwheel(false, true);
JSONObject jsonObject = new JSONObject();
try {
if (!PrefUtil.isGPSLocation(Activity)) {
jsonObject.putOpt(AppConstants.COUNTRY_ID, PrefUtil.getCountryCode(Activity));
jsonObject.putOpt(AppConstants.CITY_ID, PrefUtil.getCityCode(Activity));
Log.e(TAG, "Not GPS Home : " + jsonObject.toString());
CommandFactory commandFactory = new CommandFactory();
commandFactory.sendPostCommand(
AppConstants.WEGRAB_HOME_URL, jsonObject);
} else {
/*jsonObject.putOpt(AppConstants.COUNTRY_NAME, PrefUtil.getCountryName(Activity));
jsonObject.putOpt(AppConstants.CITY_NAME, PrefUtil.getCityName(Activity));*/
jsonObject.putOpt(AppConstants.COUNTRY_ID, "112");
jsonObject.putOpt(AppConstants.CITY_ID, "6");
CommandFactory commandFactory = new CommandFactory();
Log.e(TAG, "In GPS Home : " + jsonObject.toString());
/*commandFactory.sendPostCommand(
AppConstants.WEGRAB_HOME_URL_GPS, jsonObject);*/
commandFactory.sendPostCommand(
AppConstants.WEGRAB_HOME_URL, jsonObject);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}
}
#Override
public void onHomeDetailsPageDataLoadedSuccessfully(JSONObject jsonObject) {
super.onHomeDetailsPageDataLoadedSuccessfully(jsonObject);
Activity.stopSpinWheel();
try {
if (jsonObject != null) {
if (jsonObject != null) {
fragAdapt = new FragPageAdapter(getFragmentManager());
viewPagerHome.setAdapter(fragAdapt);
JSONArray jsonArray = jsonObject.getJSONArray(AppConstants.DEALS);
arrayListHomeData = new ArrayList<HomeDealsDataClass>();
if(jsonArray.length() > 0) {
viewPagerHome.setVisibility(View.VISIBLE);
for (int i = 0; i < jsonArray.length(); i++) {
arrayListHomeData.add(new HomeDealsDataClass(jsonArray.getJSONObject(i)));
}
fragAdapt.notifyDataSetChanged();
}else{
viewPagerHome.setVisibility(View.GONE);
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
#Override
public void onHomeDetailsPageDataLoadedFailed(JSONObject jsonObject) {
super.onHomeDetailsPageDataLoadedFailed(jsonObject);
Activity.stopSpinWheel();
}
private class FragPageAdapter extends FragmentStatePagerAdapter {
FragPageAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int pos) {
switch (pos) {
case 0:
Log.e(TAG,"Returns Fragment Home deals 1");
fragmentHomeDetails1 = FragmentHomeDetails.newInstance(arrayListHomeData.get(0));
return fragmentHomeDetails1;
case 1:
Log.e(TAG,"Returns Fragment Home deals 2");
fragmentHomeDetails2 = FragmentHomeDetails.newInstance(arrayListHomeData.get(1));
return fragmentHomeDetails2;
default:
return null;
}
}
#Override
public int getItemPosition(Object object) {
return POSITION_NONE;
}
#Override
public int getCount() {
if(arrayListHomeData != null)
return arrayListHomeData.size();
else
return 0;
}
}
}
I had this problem too before, after searching through SO answers, this helped me.
Basically try changing your PagerAdapter to extend FragmentStatePagerAdapter from FragmentPagerAdapter

Android Code for Refresh Button that destroys and recreates Text MediaPlayer (Hangs)!

viewPager4 Fragment Activities
If I click on the Texts that play short sounds, one after another then after sometimes the mediaplayer hangs and doesn't play any sound. But if I'm able to destroy activity and recreate the same activity with refresh button in Action Bar, I'd be able to click sounds again.
So what to write in the code for R.id.item2?
Or there is any other way that continuous clicking on short sounds by these texts is possible without any hang kind of problem?
Following is the reference code:
public class module1 extends FragmentActivity {
static Context con;
static int length = 0;
ViewPager mViewPager;
SectionsPagerAdapter mSectionsPagerAdapter;
static MediaPlayer mediaplayer, mediaplayert, m;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
con = this;
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(mSectionsPagerAdapter);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.mains, menu);
// Just .main into .mains [created new for different behavior of Action Bar]
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
if (item.getItemId() == R.id.item1) {
Intent in = new Intent(Intent.ACTION_VIEW,
Uri.parse("http://www.google.com"));
startActivity(in);
}
if (item.getItemId() == R.id.item2) {
//what should i write here? to destroy and recreate the same fragment activity again.
//Problem: After clicking fast on one after another text links, mediaplayert hangs and doesnt play
//Solution: exit app destroy and reopen, then mediaplayer works fine...
//SO, what to write here? kindly help!
}
return super.onOptionsItemSelected(item);
}
public class SectionsPagerAdapter extends FragmentPagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int arg0) {
Fragment ff = new DummySectionFragment1();
switch (arg0) {
case 0:
ff = new DummySectionFragment1();
break;
}
Bundle args = new Bundle();
args.putInt(DummySectionFragment1.ARG_SECTION_NUMBER, arg0 + 1);
ff.setArguments(args);
return ff;
}
#Override
public int getCount() {
return 1;
}
#Override
public CharSequence getPageTitle(int arg0) {
Locale l = Locale.getDefault();
switch (arg0) {
case 0:
return getString(R.string.title_section27).toUpperCase(l);
}
return null;
}
}
public static class DummySectionFragment1 extends Fragment {
public static final String ARG_SECTION_NUMBER = "section_number";
public DummySectionFragment1() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.m01set01, container, false);
// Genius Shot by Stupid vIC//
TextView Text = (TextView) rootView.findViewById(R.id.textView2);
Text.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View arg0) {
mediaplayert = MediaPlayer.create(MainActivity.con,
R.raw.sound1);
mediaplayert.start();
}
});
TextView Text1 = (TextView) rootView.findViewById(R.id.textView4);
Text1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View arg0) {
mediaplayert = MediaPlayer.create(MainActivity.con,
R.raw.sound2);
mediaplayert.start();
}
});
TextView Text2 = (TextView) rootView.findViewById(R.id.textView6);
Text2.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View arg0) {
mediaplayert = MediaPlayer.create(MainActivity.con,
R.raw.sound3);
mediaplayert.start();
}
});
return rootView;
}
}
#Override
protected void onDestroy() {
if (mediaplayert != null) {
mediaplayert.stop();
mediaplayert= null;
}
super.onDestroy();
}
}

Trying to implement swipe movement

public class CoursesActivity extends SherlockFragmentActivity {
ArrayList<CourseData> mCoursesList = new ArrayList<CourseData>();
public CoursesListAdapter coursesListAdapter;
public ListView mList;
public AlertDialog.Builder dlgAlert;
public Dialog loginDialog;
public Dialog loginDialogOverflow;
LinearLayout progressBar;
static SQLiteWebcourse dbHelper;
private GestureDetectorCompat mDetector;
public final static String EXTRA_MESSAGE = "com.technion.coolie.webcourse.MESSAGE";
public CoursesActivity() {
dbHelper = new SQLiteWebcourse(this, "WebcoureDB", null, 1);
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Create list of courses
mCoursesList = new ArrayList<CourseData>();
setContentView(R.layout.web_activity_courses);
mList = (ListView) findViewById(R.id.courses_list);
dlgAlert = new AlertDialog.Builder(getApplicationContext());
if (!CoolieAccount.WEBCOURSE.isAlreadyLoggedIn()) {
loginDialog = CoolieAccount.WEBCOURSE.openSigninDialog(this);
OnDismissListener dismissListener = new OnDismissListener() {
#Override
public void onDismiss(DialogInterface dialog) {
// Check if connection success
if (CoolieAccount.WEBCOURSE.isAlreadyLoggedIn()) {
// Connection SUCCESS
progressBar = (LinearLayout) findViewById(R.id.progressBarLayout_courses);
progressBar.setVisibility(View.VISIBLE);
asyncParse<CourseData> a = new asyncParse<CourseData>() {
#Override
protected List<CourseData> doInBackground(
String... params) {
// TODO Auto-generated method stub
try {
courseList crL = new courseList(
getApplicationContext());
crL.getCourses(CoolieAccount.WEBCOURSE
.getUsername(),
CoolieAccount.WEBCOURSE
.getPassword());
mCoursesList = dbHelper
.getAllCourses(CoolieAccount.WEBCOURSE
.getUsername());
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return super.doInBackground(params);
}
#Override
protected void onPostExecute(List<CourseData> result) {
// TODO Auto-generated method stub
CoursesListAdapter coursesListAdapter = new CoursesListAdapter(
getApplicationContext(), mCoursesList);
mList.setAdapter(coursesListAdapter);
mList.setBackgroundColor(0xFFF0F0F0);
progressBar.setVisibility(View.INVISIBLE);
super.onPostExecute(result);
}
};
a.execute("");
} else {
// Connection FAILED
Log.v("dbAss", "Second Time");
}
}
};
loginDialog.setOnDismissListener(dismissListener);
} else {
mCoursesList = dbHelper.getAllCourses(CoolieAccount.WEBCOURSE
.getUsername());
CoursesListAdapter coursesListAdapter = new CoursesListAdapter(
getApplicationContext(), mCoursesList);
mList.setAdapter(coursesListAdapter);
mList.setBackgroundColor(0xFFF0F0F0);
}
Log.v("Gestures", "OnTouchEvent#!$#%##%^&^$%");
// OnItemClickListener itemClicked = new OnItemClickListener() {
//
// #Override
// public void onItemClick(AdapterView<?> list, View view,
// int position, long id) {
// // TODO Auto-generated method stub
// loadCourseInformationActivity(((CourseData) mList
// .getItemAtPosition(position)).CourseDescription);
// }
// };
// mList.setOnItemClickListener(itemClicked);
mDetector = new GestureDetectorCompat(this, new MyGestureListener());
}
#Override
public boolean onTouchEvent(MotionEvent event) {
Log.v("Gestures", "OnTouchEvent#!$#%##%^&^$%");
this.mDetector.onTouchEvent(event);
// Be sure to call the superclass implementation
return super.onTouchEvent(event);
}
class MyGestureListener extends GestureDetector.SimpleOnGestureListener {
private static final String DEBUG_TAG = "Gestures";
#Override
public boolean onFling(MotionEvent event1, MotionEvent event2,
float velocityX, float velocityY) {
Log.v(DEBUG_TAG,
"onFling: " + event1.toString() + event2.toString());
Toast.makeText(getApplicationContext(), "SWIPED", Toast.LENGTH_LONG)
.show();
if (event2.getX() - event1.getX() > SWIPE_MIN_DISTANCE
&& Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY)
Toast.makeText(getApplicationContext(), "SWIPED",
Toast.LENGTH_LONG).show();
// if (showDeleteButton(e1))
// return true;
return super.onFling(event1, event2, velocityX, velocityY);
}
}
}
Hey fellas, i'm trying to implement swipe detection I went through android lesson and did exactly what is written there: http://developer.android.com/training/gestures/detector.html
For some reason when I touch the screen it doesnt go to onTouchEvent. What seems to be the problem?
You haven't set the touch listener to your ListView.
listView.setOnTouchListener(this);

Saving GridView state in a Fragment (Android) on Back Button

In my android application, I am switching between the two set of images-(Set1, Set2) displayed in a GridView-A inside a Fragment-A.I am doing this on a button press using a boolean variable. Clicking on any GridView icon leads to another Fragment-B. The problem is when I press back button on Fragment-B , the Fragment-A is always loaded with the images of Set1 by default. I want the same set of images (Set1 or Set2 ) to be loaded on FramentA that were displayed before going to FragmentB.
EDITED:
Fragment Code
public class GridViewFragment extends Fragment {
Context context;
GridView GridMenu;
GridViewAdapter ga;
Button Btn_Settings;
Button Btn_lang_Ch;
Button favoriteDuas;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//fragment = new GridViewFragment();
if (view == null) {
context = inflater.getContext();
view = inflater.inflate(R.layout.fragment_gridview, container, false);
ga = new GridViewAdapter(context);
Btn_lang_Ch = (Button) view.findViewById(R.id.lng_ch);
Btn_Settings = (Button) view.findViewById(R.id.button_settings);
favoriteDuas = (Button) view.findViewById(R.id.btn_favorite_duas);
GridMenu = (GridView) view.findViewById(R.id.gridView1);
GridMenu.setAdapter(ga);
} else {
// remove view from previously attached ViewGroup
ViewGroup parent = (ViewGroup) view.getParent();
parent.removeView(view);
}
return view;
}
#Override
public void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setRetainInstance(true);
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
Btn_lang_Ch.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
ga.changeImages(!ga.imageSetChange);
ga.Lang_Status();
}
});
GridMenu.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> arg0, View view, int position, long id) {
((MainActivity) context).loadSingleDuaFragment();
}
});
super.onActivityCreated(savedInstanceState);
}
}
GridView Adapter
public class GridViewAdapter extends BaseAdapter {
public boolean imageSetChange = false;
public static boolean curr_lang = false;//english
public Integer[] mThumbIds = {
R.drawable.eng_pic1, R.drawable.eng_pic2,
R.drawable.eng_pic3, R.drawable.eng_pic4,
R.drawable.eng_pic5, R.drawable.eng_pic6,
R.drawable.eng_pic7, R.drawable.eng_pic8,
R.drawable.eng_pic9, R.drawable.eng_pic10,
R.drawable.eng_pic11, R.drawable.eng_pic12,
R.drawable.eng_pic13, R.drawable.eng_pic14,
R.drawable.eng_pic15, R.drawable.eng_pic16,
R.drawable.eng_pic17, R.drawable.eng_pic18,
R.drawable.eng_pic19, R.drawable.eng_pic20,
R.drawable.eng_pic21
};
public Integer[] mThumbIds1 = {
R.drawable.urdu_dua1, R.drawable.urdu_dua2,
R.drawable.urdu_dua3, R.drawable.urdu_dua4,
R.drawable.urdu_dua5, R.drawable.urdu_dua6,
R.drawable.urdu_dua7, R.drawable.urdu_dua8,
R.drawable.urdu_dua9, R.drawable.urdu_dua10,
R.drawable.urdu_dua11, R.drawable.urdu_dua12,
R.drawable.urdu_dua13, R.drawable.urdu_dua14,
R.drawable.urdu_dua15, R.drawable.urdu_dua16,
R.drawable.urdu_dua17, R.drawable.urdu_dua18,
R.drawable.urdu_dua19, R.drawable.urdu_dua20,
R.drawable.urdu_dua21
};
private Context mContext;
public GridViewAdapter(Context c) {
mContext = c;
}
#Override
public int getCount() {
// TODO Auto-generated method stub
return mThumbIds.length;
}
#Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return mThumbIds[position];
}
#Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
View MyView;
if (convertView == null) {
LayoutInflater li = ((Activity) mContext).getLayoutInflater();
MyView = li.inflate(R.layout.menuitem, parent, false);
} else {
MyView = (View) convertView;
}
ImageView iv = (ImageView) MyView.findViewById(R.id.image);
if (imageSetChange) {
iv.setImageResource(mThumbIds1[position]);
} else {
iv.setImageResource(mThumbIds[position]);
}
return MyView;
}
public void changeImages(boolean change) {
this.imageSetChange = change;
notifyDataSetChanged();
// gf.Lang_Status();
}
public void Lang_Status() {
// if curr_eng
if (!curr_lang)
this.curr_lang = true; // change to urdu
// if curr_urdu
else
this.curr_lang = false; // change to english
}
}
EDIT:
MainActivity
public void loadGridViewFragment() {
if (activityActive) {
FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
if(getSupportFragmentManager().findFragmentByTag(GridViewFragment.TAG)!=null){
ft.replace(R.id.fl_view, frag,GridViewFragment.TAG);
}
else
{
frag = new GridViewFragment();
ft.replace(R.id.fl_view, frag,GridViewFragment.TAG);
}
ft.commit();
}
}
So, can anybody help me out regarding what should be done to load the previous set of images on coming back to gridview fragment instead of having the default images of Set1.

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