I have an android app code that uses the navigation drawer layout with fragments as the main content.
So far I have had a specific fragment class for all the fragment items in my drawer. Now I do however have a different layout I want to get as an item in my drawer as well. The layout is a LiniarLayout and defined in xml characteristic.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="10dp">
<LinearLayout android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="10dp">
<TextView android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/label_device_address"
android:textSize="18sp"/>
<Space android:layout_width="5dp"
android:layout_height="wrap_content"/>
<TextView android:id="#+id/device_address"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="18sp"/>
</LinearLayout>
<LinearLayout android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="10dp">
<TextView android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/label_state"
android:textSize="18sp"/>
<Space android:layout_width="5dp"
android:layout_height="wrap_content"/>
<TextView android:id="#+id/connection_state"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="#string/disconnected"
android:textSize="18sp"/>
</LinearLayout>
<LinearLayout android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="10dp">
<TextView android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/label_data"
android:textSize="18sp"/>
<Space android:layout_width="5dp"
android:layout_height="wrap_content"/>
<TextView android:id="#+id/data_value"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="#string/no_data"
android:textSize="18sp"/>
</LinearLayout>
<ExpandableListView android:id="#+id/gatt_services_list"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</LinearLayout>
in my main activity I preload the fragments in the onCreate
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//create adapters early
mAdapter = new DeviceAdapter(this, false);
mFilterAdapter = new DeviceAdapter(this, true);
setContentView(R.layout.activity_main);
mFragmentManager = getFragmentManager();
mNavigationDrawerFragment = (NavigationDrawerFragment)
mFragmentManager.findFragmentById(R.id.navigation_drawer);
mTitle = getTitle();
// Set up the drawer.
mNavigationDrawerFragment.setUp(
R.id.navigation_drawer,
(DrawerLayout) findViewById(R.id.drawer_layout));
mDevices = new HashMap<String, ScanResultContent.BtLeDeviceItem>();
mFilteredDevices = new HashMap<String, ScanResultContent.BtLeDeviceItem>();
//setup fragment 1
mScanResultFragment = new ResultListFragment();
//setup fragment 2
mFilteredScanResultFragment = new ResultListFragment();
mScanResultFragment.setListAdapter(mAdapter);
//setup fragment 3
mDeviceInfoFragment = DeviceInfoFragment.newInstance("");
// Sets up UI references for the Device Info viewer.
mConnectionState = (TextView) findViewById(R.id.connection_state);
mDataField = (TextView) findViewById(R.id.data_value);
mGattServicesList = (ExpandableListView) findViewById(R.id.gatt_services_list);
mGattServicesList.setOnChildClickListener(servicesListClickListner);
mFilteredScanResultFragment.setListAdapter(mFilterAdapter);
// setup default fragment shown
mFragmentManager.beginTransaction().add(R.id.container, mScanResultFragment).commit();
}
I have tried to get the layout loaded into a fragment using the DeviceInfoFragment class:
public class DeviceInfoFragment extends Fragment {
public DeviceInfoFragment(){
super();
}
public static DeviceInfoFragment newInstance(String text) {
DeviceInfoFragment f = new DeviceInfoFragment();
Bundle b = new Bundle();
b.putString("text", text);
f.setArguments(b);
return f;
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.gatt_characteristics_layout, container, false);
return v;
}
}
I want to be able to switch between the fragments using this (which have worked fine except for the new fragment 3):
#Override
public void onNavigationDrawerItemSelected(int position) {
// update the main content by replacing fragments
Fragment f = null;
switch (position+1){
case 1:
f = mScanResultFragment;
mTitle = getString(R.string.title_devicescan);
break;
case 2:
f = mFilteredScanResultFragment;
mTitle = getString(R.string.title_results);
break;
case 3:
f = mDeviceInfoFragment;
mTitle = getString(R.string.title_device_info);
break;
}
if(f != null) {
mFragmentManager.beginTransaction()
.replace(R.id.container, f)
.commit();
}
restoreActionBar();
}
It does however not seem to work as the line:
mGattServicesList.setOnChildClickListener(servicesListClickListner);
fails with
E/AndroidRuntime(30644): Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ExpandableListView.setOnChildClickListener(android.widget.ExpandableListView$OnChildClickListener)' on a null object reference
Can anyone tell me what I am doing wrong here?
Related
I have set up a RecyclerView adapter with ViewPager in an activity namely TvShowEpisodeDetails , it works well but there is one issue, the Layout of RecyclerView is fixed while scrolling up and down in the Fragment(TvShowEpisodeDetailsFragment). But I want it to scroll with them.
The RecyclerView and ViewPager are both set inside viewpager_with_toolbar_overlay.xml Layout , and both has been settup in The Activity.
TvShowEpisodeDetailsFragment is the fragment class which belongs to activity class TvShowEpisodeDetails , the fragment creates as many episodes as a TV Show season can offer.
And off course this issue will be gone if I set RecyclerView adapter inside fragment, but I will get non-fixable highlighting and scrolling issues , that is why I set it inside the activity because it does not give those issues.
I need to make it work somehow inside the activity.
My goal is that RecyclerView and ViewPager has to be in the same layout XML file and they both must either be in the activity or fragment class
Is it possible to make the RecyclerView scroll with rest of the fragment layouts?
or
Is it possible to do it programmatically?
Here is the activity
public class TvShowEpisodeDetails extends MizActivity{
#Override
protected int getLayoutResource() {
return R.layout.viewpager_with_toolbar_overlay;
}
#Override
public void onCreate(Bundle savedInstanceState) {
mBus = MizuuApplication.getBus();
super.onCreate(savedInstanceState);
// Set theme
setTheme(R.style.Mizuu_Theme_NoBackground);
// setting episodeslist
final ArrayList<PlanetModel> episodeslist = new ArrayList<>();
for(TvShowEpisode e : mEpisodes){
episodeslist.add(new PlanetModel(e.mEpisode));
}
// setting RecyclerView
mEpisodesList = (RecyclerView) findViewById(R.id.episodesLIST);
// Setting LinearLayoutManager
LinearLayoutManager layoutManager
= new LinearLayoutManager(this.getApplicationContext(), LinearLayoutManager.HORIZONTAL, false);
//mEpisodesList.setLayoutManager(new LinearLayoutManager(mContext));
mEpisodesList.setLayoutManager(layoutManager);
// Setting RecyclerView Adapter
PlanetAdapter.OnItemClickListener indicatorCallback = new PlanetAdapter.OnItemClickListener() {
#Override
public void onItemClick(String item) {
SharedPreferences getPref = getContext().getSharedPreferences("PlanetAdapter", Context.MODE_PRIVATE);
int pos = getPref.getInt("newPosition", 0);
mViewPager.setCurrentItem(pos,false);
}
};
final PlanetAdapter planetAdapter = new PlanetAdapter(episodeslist,indicatorCallback);
mEpisodesList.setAdapter(planetAdapter);
// Setting ViewPager
mViewPager = (ViewPager) findViewById(R.id.awesomepager);
mViewPager.setAdapter(new TvShowEpisodeDetailsAdapter(getSupportFragmentManager()));
mViewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
#Override
public void onPageSelected(int position) {
planetAdapter.setSelectedIndex(position);
planetAdapter.notifyDataSetChanged();
mEpisodesList.smoothScrollToPosition(position);
//mEpisodesList.scrollToPosition(position);
for (int i=0; i<episodeslist.size(); i++)
{
episodeslist.get(i).setPlanetSelected(false);
}
episodeslist.get(position).setPlanetSelected(true);
ViewUtils.updateToolbarBackground(TvShowEpisodeDetails.this, mToolbar, 0, mEpisodes.get(position).getTitle(), Color.TRANSPARENT);
}
});
if (savedInstanceState != null) {
mViewPager.setCurrentItem(savedInstanceState.getInt("tab", 0));
} else {
for (int i = 0; i < mEpisodes.size(); i++) {
if (mEpisodes.get(i).getSeason().equals(MizLib.addIndexZero(mSeason)) && mEpisodes.get(i).getEpisode().equals(MizLib.addIndexZero(mEpisode))) {
mViewPager.setCurrentItem(i);
break;
}
}
}
}
}
viewpager_with_toolbar_overlay
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/layout"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<android.support.v4.view.ViewPager
android:id="#+id/awesomepager"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<ProgressBar
android:id="#+id/progressbar"
style="?android:attr/progressBarStyleLarge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:visibility="gone" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="40dp"
android:background="#068006"
android:layout_marginTop="450dp"
>
<android.support.v7.widget.RecyclerView
android:id="#+id/episodesLIST"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:scrollbars="horizontal" />
</LinearLayout>
<include layout="#layout/toolbar_layout" />
</FrameLayout>
Here is the XML layout of the fragment which is inflated in onCreateView of the fragment class
episode_details.xml
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/abc_input_method_navigation_guard">
<com.miz.views.ObservableScrollView
android:id="#+id/observableScrollView"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<RelativeLayout
android:id="#+id/relativeLayout1"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ImageView
android:id="#+id/episodePhoto"
android:layout_width="match_parent"
android:layout_height="#dimen/backdrop_portrait_height"
android:scaleType="centerCrop"
android:src="#drawable/bg" />
<com.melnykov.fab.FloatingActionButton
android:id="#+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/episodePhoto"
android:layout_alignParentEnd="false"
android:layout_alignParentRight="true"
android:layout_marginTop="#dimen/content_details_fab_negative_margin"
android:layout_marginRight="#dimen/content_details_baseline_margin"
android:src="#drawable/ic_play_arrow_white_36dp"
app:fab_colorNormal="#666"
app:fab_type="mini" />
<LinearLayout
android:id="#+id/linearLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/fab"
android:layout_marginLeft="#dimen/content_details_baseline_margin"
android:layout_marginTop="#dimen/content_details_title_margin_top"
android:layout_marginRight="#dimen/content_details_baseline_margin"
android:layout_toLeftOf="#+id/fab"
android:orientation="vertical">
<TextView
android:id="#+id/movieTitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ellipsize="end"
android:maxLines="3"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textColor="#FFFFFF"
android:textSize="#dimen/content_details_title" />
<TextView
android:id="#+id/textView7"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="#dimen/content_details_very_small_margin"
android:layout_marginBottom="#dimen/content_details_baseline_margin"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textColor="#FFFFFF"
android:textSize="#dimen/content_details_subheader"
android:textStyle="bold|italic" />
</LinearLayout>
</RelativeLayout>
<LinearLayout
android:id="#+id/details_area"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#666"
android:baselineAligned="false"
android:elevation="1dp"
android:minHeight="#dimen/content_details_large_margin"
android:orientation="horizontal"
android:paddingLeft="#dimen/content_details_baseline_margin"
android:paddingTop="#dimen/content_details_small_margin"
android:paddingRight="#dimen/content_details_baseline_margin"
android:paddingBottom="#dimen/content_details_small_margin">
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_weight="1"
android:gravity="center_horizontal"
android:orientation="vertical">
<TextView
android:id="#+id/TextView03"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ellipsize="end"
android:gravity="center_horizontal"
android:lines="1"
android:maxLines="1"
android:text="#string/detailsAirDate"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textSize="#dimen/content_details_area_subheader" />
<TextView
android:id="#+id/textReleaseDate"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center_horizontal"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="#FFFFFF"
android:textSize="#dimen/content_details_area_header"
android:textStyle="bold" />
</LinearLayout>
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_weight="1"
android:gravity="center_horizontal"
android:orientation="vertical">
<TextView
android:id="#+id/textView61"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ellipsize="end"
android:gravity="center_horizontal"
android:lines="1"
android:maxLines="1"
android:text="#string/detailsRating"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textSize="#dimen/content_details_area_subheader" />
<TextView
android:id="#+id/textView12"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center_horizontal"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="#FFFFFF"
android:textSize="#dimen/content_details_area_header"
android:textStyle="bold" />
</LinearLayout>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:padding="#dimen/content_details_baseline_margin">
<TextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="#dimen/content_details_baseline_margin"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="#FFFFFF"
android:textSize="#dimen/content_details_body_text" />
<TextView
android:id="#+id/director"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="12dp"
android:drawableLeft="#drawable/ic_movie_white_24dp"
android:drawablePadding="#dimen/movie_details_padding"
android:focusable="false"
android:gravity="center_vertical"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="#f0f0f0"
android:textSize="#dimen/content_details_body_text" />
<TextView
android:id="#+id/writer"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="12dp"
android:drawableLeft="#drawable/ic_edit_white_24dp"
android:drawablePadding="#dimen/movie_details_padding"
android:focusable="false"
android:gravity="center_vertical"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="#f0f0f0"
android:textSize="#dimen/content_details_body_text" />
<TextView
android:id="#+id/guest_stars"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="12dp"
android:drawableLeft="#drawable/ic_people_white_24dp"
android:drawablePadding="#dimen/movie_details_padding"
android:focusable="false"
android:gravity="center_vertical"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="#f0f0f0"
android:textSize="#dimen/content_details_body_text" />
<TextView
android:id="#+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:drawableLeft="#drawable/ic_folder_open_white_24dp"
android:drawablePadding="#dimen/movie_details_padding"
android:gravity="center_vertical"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="#FFFFFF"
android:textSize="#dimen/content_details_body_text" />
</LinearLayout>
</LinearLayout>
</com.miz.views.ObservableScrollView>
<FrameLayout
android:id="#+id/progress_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/bg"
android:visibility="gone">
<ProgressBar
android:id="#+id/progressBar1"
style="?android:attr/progressBarStyleLarge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center" />
</FrameLayout>
</FrameLayout>
Update
Fragment
#SuppressLint("InflateParams") public class TvShowEpisodeDetailsFragment extends Fragment {
public TvShowEpisodeDetailsFragment() {}
public static TvShowEpisodeDetailsFragment newInstance(String showId, int season, int episode) {
TvShowEpisodeDetailsFragment pageFragment = new TvShowEpisodeDetailsFragment();
Bundle bundle = new Bundle();
bundle.putString("showId", showId);
bundle.putInt("season", season);
bundle.putInt("episode", episode);
pageFragment.setArguments(bundle);
return pageFragment;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setRetainInstance(true);
setHasOptionsMenu(true);
mContext = getActivity();
mBus = MizuuApplication.getBus();
mShowFileLocation = PreferenceManager.getDefaultSharedPreferences(getActivity()).getBoolean(SHOW_FILE_LOCATION, true);
mPicasso = MizuuApplication.getPicassoDetailsView(getActivity());
mMediumItalic = TypefaceUtils.getRobotoMediumItalic(mContext);
mMedium = TypefaceUtils.getRobotoMedium(mContext);
mCondensedRegular = TypefaceUtils.getRobotoCondensedRegular(mContext);
mDatabaseHelper = MizuuApplication.getTvEpisodeDbAdapter();
LocalBroadcastManager.getInstance(mContext).registerReceiver(mBroadcastReceiver,
new IntentFilter(LocalBroadcastUtils.UPDATE_TV_SHOW_EPISODE_DETAILS_OVERVIEW));
loadEpisode();
}
#Override
public void onDestroy() {
super.onDestroy();
LocalBroadcastManager.getInstance(mContext).unregisterReceiver(mBroadcastReceiver);
}
private BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
loadEpisode();
loadData();
}
};
private void loadEpisode() {
if (!getArguments().getString("showId").isEmpty() && getArguments().getInt("season") >= 0 && getArguments().getInt("episode") >= 0) {
Cursor cursor = mDatabaseHelper.getEpisode(getArguments().getString("showId"), getArguments().getInt("season"), getArguments().getInt("episode"));
if (cursor.moveToFirst()) {
mEpisode = new TvShowEpisode(getActivity(),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_SHOW_ID)),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_EPISODE_TITLE)),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_EPISODE_PLOT)),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_SEASON)),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_EPISODE)),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_EPISODE_AIRDATE)),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_EPISODE_DIRECTOR)),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_EPISODE_WRITER)),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_EPISODE_GUESTSTARS)),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_EPISODE_RATING)),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_HAS_WATCHED)),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_FAVOURITE))
);
mEpisode.setFilepaths(MizuuApplication.getTvShowEpisodeMappingsDbAdapter().getFilepathsForEpisode(
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_SHOW_ID)),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_SEASON)),
cursor.getString(cursor.getColumnIndex(DbAdapterTvShowEpisodes.KEY_EPISODE))
));
}
cursor.close();
}
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.episode_details, container, false);
}
#Override
public void onViewCreated(final View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
mBackdrop = (ImageView) view.findViewById(R.id.imageBackground);
mEpisodePhoto = (ImageView) view.findViewById(R.id.episodePhoto);
mDetailsArea = view.findViewById(R.id.details_area);
mTitle = (TextView) view.findViewById(R.id.movieTitle);
mSeasonEpisodeNumber = (TextView) view.findViewById(R.id.textView7);
mDescription = (TextView) view.findViewById(R.id.textView2);
mFileSource = (TextView) view.findViewById(R.id.textView3);
mAirDate = (TextView) view.findViewById(R.id.textReleaseDate);
mRating = (TextView) view.findViewById(R.id.textView12);
mDirector = (TextView) view.findViewById(R.id.director);
mWriter = (TextView) view.findViewById(R.id.writer);
mGuestStars = (TextView) view.findViewById(R.id.guest_stars);
mScrollView = (ObservableScrollView) view.findViewById(R.id.observableScrollView);
mFab = (FloatingActionButton) view.findViewById(R.id.fab);
mFab.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
ViewUtils.animateFabJump(v, new SimpleAnimatorListener() {
#Override
public void onAnimationEnd(Animator animation) {
play();
}
});
}
});
...
}
...
}
I have set up a RecyclerView adapter with ViewPager in an activity namely TvShowEpisodeDetails , it works well but there is one issue, the Layout of RecyclerView is fixed while scrolling up and down in the Fragment(TvShowEpisodeDetailsFragment). But I want it to scroll with them.
It's hard to use the RecyclerView outside of the ViewPager page fragment; because you can't synchronize and link the touch/motion events when you scroll the page up/down (or when you swipe to next/previous page) between both the page fragment and a standalone (i.e. activity) RecyclerView. Even that won't be smooth.
So, the RecyclerView should be a part of the ViewPager page.
And off course this issue will be gone if I set RecyclerView adapter inside fragment, but I will get unfixable highlighting and scrolling issues
So, now the issue of adding the RecyclerView in the ViewPager fragment is the highlighting issue of the RecyclerView item when you click on any item or when you swipe the ViewPager to right/left page.
But, the main issue is that there is a RecyclerView instance per page, i.e. if you have 5 pages, then you have 5 RecyclerViews.
So, it's a cumbersome to track highlighting only within the RecyclerView adapter class. And hence manipulating that with OnClickListeners solely will have issues of linking these RecyclerView and adapter instances together to update their highlighting item.
So, a simpler approach is to pass a parameter to the RecyclerView adapter with the selected item (which is definitely equals to the current ViewPager page position).
And then do a check in the onBindViewHolder() if the position equals to the passed-in value, then highlight the item; otherwise keep items with the original color.
So, wrapping this up into actions:
Change the adapter constructor to accept a highlighted_position parameter
public PlanetAdapter(ArrayList<PlanetModel> episodeslist,
int highlightedPosition, OnItemClickListener listener)
Whenever you create the ViewPager fragment using newInstance() pass-in the current position of the page fragment:
So, in the TvShowEpisodeDetails activity:
for (int i = 0; i < mEpisodes.size(); i++)
fragments.add(TvShowEpisodeDetailsFragment
.newInstance(mShowId,
Integer.parseInt(mEpisodes.get(i).getSeason()),
Integer.parseInt(mEpisodes.get(i).getEpisode()),
i)); // The position
And in the TvShowEpisodeDetailsFragment fragment, register this into a field in the fragment argument:
public static TvShowEpisodeDetailsFragment newInstance(String showId, int season, int episode, int position) { // adding position
TvShowEpisodeDetailsFragment pageFragment = new TvShowEpisodeDetailsFragment();
Bundle bundle = new Bundle();
// trimmed code.
bundle.putInt("position", position); // <<<< into the bundle
pageFragment.setArguments(bundle);
return pageFragment;
}
And set that in the adapter creation:
int currentPosition = getArguments().getInt("position");
planetAdapter = new PlanetAdapter(episodeslist, currentPosition, new PlanetAdapter.OnItemClickListener() {
#Override
public void onItemClick(final int pos) {
mCallback.sendText(pos);
}
});
And reflect that in the adapter to highlight the item:
public class PlanetAdapter extends RecyclerView.Adapter<PlanetAdapter.PlanetViewHolder> {
private final int highlightedPos;
public PlanetAdapter(ArrayList<PlanetModel> episodeslist, int highlightedPosition, OnItemClickListener listener) {
this.episodeslist = episodeslist;
this.listener = listener;
this.highlightedPos = highlightedPosition; // <<< set the position
}
#Override
public void onBindViewHolder(PlanetAdapter.PlanetViewHolder vh, final int position) {
TextView tv = (TextView) vh.itemView;
PlanetModel planetModel = episodeslist.get(position);
tv.setText(planetModel.getPlanetName());
tv.setCompoundDrawablesWithIntrinsicBounds(R.drawable.bg, 0, 0, 0);
if (highlightedPos == position) { //<<<<< Highlight the item
vh.itemView.setBackgroundColor(getContext().getResources().getColor(R.color.colorPrimaryLight));
Log.d("LOG_TAG", "onClick: Highlight item: " + highlightedPos);
} else {
vh.itemView.setBackgroundColor(getContext().getResources().getColor(R.color.colorPrimaryDark));
Log.d("LOG_TAG", "onClick: No highlight: " + highlightedPos);
}
}
}
have some problem with sign in method.
I have activity that contain fragment container and 2 buttons(sign in and sign up).
In on create method of the activity i'm initialize fragments, and adding the login fragment to the container.
In method onClickSignButtons i have switch case func that should get pressed button id and do some think according to the button id.
But on click button app crashes.
There is the log from logcat:
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.View android.view.View.findViewById(int)' on a null object reference
at com.enjoyapp.eventmanagement.Screens.Login.View.LoginActivity.onClickSignButtons(LoginActivity.java:45)
LoginActivity
public class LoginActivity extends AppCompatActivity implements LoginModel {
private LoginPresenter presenter;
private Fragment EmailAndPasswordFragment, userDetailsFragment;
private Fragment selectedFragment = null;
UserSingleton userSingleton;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
presenter = new LoginPresenter(this);
EmailAndPasswordFragment = new EmailAndPasswordFieldsFragment();
userDetailsFragment = new UserDetailsFragment();
getSupportFragmentManager().beginTransaction().add(R.id.fields_container, new EmailAndPasswordFieldsFragment())
.commit();
selectedFragment = EmailAndPasswordFragment;
}
public void onClickSignButtons(View view) {
switch (view.getId()) {
case R.id.btnSignIn:
if (selectedFragment == EmailAndPasswordFragment) {
userSingleton.setmEmail(((EditText) EmailAndPasswordFragment.getView().findViewById(R.id.etEmail)).getText().toString().trim());
userSingleton.setmPassword(((EditText) EmailAndPasswordFragment.getView().findViewById(R.id.etPassword)).getText().toString().trim());
presenter.signIn(userSingleton.getmEmail(), userSingleton.getmPassword());
} else {
getSupportFragmentManager().beginTransaction().add(R.id.fields_container, new EmailAndPasswordFieldsFragment())
.commit();
selectedFragment = EmailAndPasswordFragment;
}
break;
case R.id.btnGetStarted:
//TODO edd signup methos
break;
}
}
EmailAndPasswordFieldsFragment
public class EmailAndPasswordFieldsFragment extends Fragment {
private EditText etEmail, etPassword;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_email_and_password_fields, container, false);
etEmail = view.findViewById(R.id.etEmail);
etPassword = view.findViewById(R.id.etPassword);
return view;
}
}
LoginActivity.xml (Button)
<Button
android:id="#+id/btnSignIn"
android:layout_width="200dp"
android:layout_height="50dp"
android:layout_marginBottom="48dp"
android:background="#null"
android:onClick="onClickSignButtons"
android:stateListAnimator="#null"
android:text="#string/btn_sign_in"
android:textColor="#color/white"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent" />
From What i can see is you are initialising fragment and storing it in variable EmailAndPasswordFragment but while adding fragment to container you are again re initialising it.
Thats's why it is giving null pointer exception.
do this is your onCreate
getSupportFragmentManager().beginTransaction().add(R.id.fields_container, EmailAndPasswordFragment)
.commit();
EmailAndPasswordFragment = new EmailAndPasswordFieldsFragment();
This is first instance of EmailAndPasswordFragment
and in add method your are passing new instance of EmailAndPasswordFragment
and inside onclick you are accessing value on first instance.
the problem with your line
EmailAndPasswordFragment = new EmailAndPasswordFieldsFragment();
because u are creating the Fragment object but assign it to the class name, not to the variable and then you are assigning to the variable selectedFragment which is assigned by class name.
Solution
replace the line
EmailAndPasswordFragment = new EmailAndPasswordFieldsFragment();
with
EmailAndPasswordFragment ePF = new EmailAndPasswordFieldsFragment();
and line
getSupportFragmentManager().beginTransaction().add(R.id.fields_container, new EmailAndPasswordFieldsFragment())
.commit();
selectedFragment = EmailAndPasswordFragment;
with
getSupportFragmentManager().beginTransaction().add(R.id.fields_container, ePF)
.commit();
selectedFragment = ePF;
and replace the line
if(selectedFragment == EmailAndPasswordFragment) with if(!(selectedFragment instanceof EmailAndPasswordFragment))
Can you change your code as below:
The reason for null pointer exception is that you are using another instance to call findViewById() which is not initialized yet and you are passing another to fragment manager.
public class LoginActivity extends AppCompatActivity implements LoginModel {
private LoginPresenter presenter;
private Fragment emailAndPasswordFragment, userDetailsFragment;
private Fragment selectedFragment = null;
UserSingleton userSingleton;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
presenter = new LoginPresenter(this);
emailAndPasswordFragment = new EmailAndPasswordFieldsFragment();
userDetailsFragment = new UserDetailsFragment();
getSupportFragmentManager().beginTransaction().add(R.id.fields_container, emailAndPasswordFragment)
.commit();
selectedFragment = emailAndPasswordFragment;
}
public void onClickSignButtons(View view) {
switch (view.getId()) {
case R.id.btnSignIn:
if (selectedFragment == emailAndPasswordFragment) {
userSingleton.setmEmail(((EditText) emailAndPasswordFragment.getView().findViewById(R.id.etEmail)).getText().toString().trim());
userSingleton.setmPassword(((EditText) emailAndPasswordFragment.getView().findViewById(R.id.etPassword)).getText().toString().trim());
presenter.signIn(userSingleton.getmEmail(), userSingleton.getmPassword());
} else {
getSupportFragmentManager().beginTransaction().add(R.id.fields_container, emailAndPasswordFragment)
.commit();
selectedFragment = emailAndPasswordFragment;
}
break;
case R.id.btnGetStarted:
//TODO edd signup methos
break;
}
}
also please don't use CAPS in naming conventions. always use camelCase. that will make you clear on what are you using.
UPDATE:
Ohhh god i'm sorry guys ,
I just forgot to initialize UserSingleton class.
just added to onCreate method next line:
userSingleton = UserSingleton.getInstance();
There is a new code with the xml
public class LoginActivity extends AppCompatActivity implements LoginModel {
private LoginPresenter presenter;
private Fragment emailAndPasswordFragment;
private Fragment userDetailsFragment;
private Fragment selectedFragment = null;
UserSingleton userSingleton;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
presenter = new LoginPresenter(this);
emailAndPasswordFragment = new EmailAndPasswordFieldsFragment();
userDetailsFragment = new UserDetailsFragment();
getSupportFragmentManager().beginTransaction().add(R.id.fields_container, emailAndPasswordFragment)
.commit();
selectedFragment = emailAndPasswordFragment;
}
public void onClickSignInAndUpButtons(View view) {
switch (view.getId()) {
case R.id.btnSignIn:
if (selectedFragment == emailAndPasswordFragment) {
userSingleton.setmEmail(((EditText) emailAndPasswordFragment.getView().findViewById(R.id.etEmail)).getText().toString().trim());
userSingleton.setmPassword(((EditText) emailAndPasswordFragment.getView().findViewById(R.id.etPassword)).getText().toString().trim());
presenter.signIn(userSingleton.getmEmail(), userSingleton.getmPassword());
} else {
getSupportFragmentManager().beginTransaction().add(R.id.fields_container, emailAndPasswordFragment)
.commit();
selectedFragment = emailAndPasswordFragment;
}
break;
case R.id.btnGetStarted:
//TODO edd signup methos
break;
}
}
Login activity XML:
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/gradien_color"
tools:context=".Screens.Login.View.LoginActivity">
<ImageView
android:id="#+id/logoMain"
android:layout_width="200dp"
android:layout_height="200dp"
android:layout_gravity="center"
android:layout_marginStart="8dp"
android:layout_marginTop="52dp"
android:layout_marginEnd="8dp"
android:contentDescription="#string/logo_main"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.497"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="#drawable/logo_main" />
<FrameLayout
android:id="#+id/fields_container"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:layout_marginBottom="8dp"
app:layout_constraintBottom_toTopOf="#+id/cvGetStarted"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/logoMain">
</FrameLayout>
<androidx.cardview.widget.CardView
android:id="#+id/cvGetStarted"
android:layout_width="300dp"
android:layout_height="50dp"
android:layout_marginStart="8dp"
android:layout_marginBottom="20dp"
android:translationZ="8dp"
app:layout_constraintBottom_toTopOf="#+id/btnSignIn"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.456"
app:layout_constraintStart_toStartOf="parent"
card_view:cardCornerRadius="25dp"
card_view:cardElevation="3dp">
<Button
android:id="#+id/btnGetStarted"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/register_button_style"
android:text="#string/btn_get_started"
android:textColor="#color/white" />
</androidx.cardview.widget.CardView>
<Button
android:id="#+id/btnSignIn"
android:layout_width="200dp"
android:layout_height="50dp"
android:layout_marginBottom="48dp"
android:background="#null"
android:onClick="onClickSignInAndUpButtons"
android:stateListAnimator="#null"
android:text="#string/btn_sign_in"
android:textColor="#color/white"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.497"
app:layout_constraintStart_toStartOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
Fragment class
public class EmailAndPasswordFieldsFragment extends Fragment {
private EditText etEmail, etPassword;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_email_and_password_fields, container, false);
etEmail = view.findViewById(R.id.etEmail);
etPassword = view.findViewById(R.id.etPassword);
return view;
}
}
Fragment xml:
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".Screens.Login.View.UserDetailsFragment">
<LinearLayout
android:layout_width="350dp"
android:layout_height="150dp"
android:layout_gravity="center"
android:orientation="vertical"
android:gravity="center">
<androidx.cardview.widget.CardView
android:layout_width="250dp"
android:layout_height="40dp"
android:layout_marginStart="8dp"
android:layout_marginEnd="8dp"
android:layout_marginBottom="12dp"
android:translationZ="8dp"
card_view:cardBackgroundColor="#android:color/transparent"
card_view:cardCornerRadius="25dp"
card_view:cardElevation="3dp">
<EditText
android:id="#+id/etEmail"
android:layout_width="250dp"
android:layout_height="40dp"
android:background="#drawable/input_field_style"
android:drawableStart="#drawable/login_icon"
android:drawableTint="#color/tint_and_text_color"
android:ems="10"
android:hint="#string/hint_email"
android:inputType="textEmailAddress"
android:textColor="#color/main_text_color"
android:textColorHint="#color/tint_and_text_color"
android:textSize="16sp" />
</androidx.cardview.widget.CardView>
<androidx.cardview.widget.CardView
android:layout_width="250dp"
android:layout_height="40dp"
android:layout_marginStart="8dp"
android:layout_marginEnd="8dp"
android:layout_marginBottom="12dp"
android:translationZ="8dp"
card_view:cardBackgroundColor="#android:color/transparent"
card_view:cardCornerRadius="25dp"
card_view:cardElevation="3dp">
<EditText
android:id="#+id/etPassword"
android:layout_width="250dp"
android:layout_height="40dp"
android:background="#drawable/input_field_style"
android:drawableStart="#drawable/password_icon"
android:drawableTint="#color/tint_and_text_color"
android:ems="10"
android:hint="#string/hint_password"
android:inputType="textPassword"
android:textColor="#color/main_text_color"
android:textColorHint="#color/tint_and_text_color"
android:textSize="16sp" />
</androidx.cardview.widget.CardView>
</LinearLayout>
</FrameLayout>
I'm creating my first android application, and want to use Dynamic Tablerow in my application. In my MainFragment.java, there is OnClickListener for adding text. I use Log.d to check whether it is working or not. I checked it work. But text is not added in Tablerow; its ID is mealRow.
I want add TextView in an existing Tablerow. Please check it and answer to me. Thanks.
I tried new Tablerow. But it also failed.
I mean new TextView in new Tablerow in an existing TableLayout.
MainFragment.java
public static MainFragment newInstance() {
return new MainFragment();
}
#Override
public View onCreateView (LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
final View view = inflater.inflate(R.layout.main_fragment, container, false);
Response.Listener<String> responseListener;
responseListener = new Response.Listener<String>() {
#Override
public void onResponse(String response) {
String mealList = response;
Log.d(TAG, mealList+"");
//TextView meal = (TextView) getView().findViewById(R.id.meal1);
//meal.setText(mealList);
}
};
Log.d(TAG, "Meal queued!");
MealRequest mealRequest = new MealRequest(countryCode, schulCode, insttNm, schulCrseScCode,
schMmealScCode, schYmd, responseListener);
RequestQueue queue = Volley.newRequestQueue(getActivity());
queue.add(mealRequest);
Button create = (Button) view.findViewById(R.id.Create);
create.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Log.d(TAG, "button Clicked!");
TableRow mealRow = (TableRow) view.findViewById(R.id.mealRow);
ViewGroup.LayoutParams textParams = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
TextView meals = new TextView(getActivity());
meals.setText("new");
meals.setLayoutParams(textParams);
meals.setGravity(Gravity.CENTER);
meals.setTextColor(Color.parseColor("#000000"));
meals.setTextSize(TypedValue.COMPLEX_UNIT_SP, 20);
mealRow.addView(meals);
}
});
return view;
}
MainActivity.java
private final static String TAG = MainActivity.class.getName();
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
fragmentTransaction.add(R.id.fragment_container, MainFragment.newInstance()).commit();
navigationView.setNavigationItemSelectedListener(this);
}
**--------------------------------cut--------------------------**
#SuppressWarnings("StatementWithEmptyBody")
#Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.nav_home) {
FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.fragment_container, MainFragment.newInstance()).commit();
} else if (id == R.id.nav_calendar) {
FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.fragment_container, Calendar.newInstance()).commit();
} else if (id == R.id.nav_timetable) {
} else if (id == R.id.nav_homework) {
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
main_fragment.xml
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Today's meal"
android:textColor="#000000"
android:textSize="20sp"/>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TableLayout
android:id="#+id/mealTable"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:stretchColumns="*">
<TableRow
android:id="#+id/mealRow"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="#+id/meal1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="1dp"
android:layout_marginBottom="1dp"
android:gravity="center"
android:text="1"
android:textColor="#000000"
android:textSize="20sp" />
<TextView
android:id="#+id/meal2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="1dp"
android:layout_marginBottom="1dp"
android:gravity="center"
android:text="2"
android:textColor="#000000"
android:textSize="20sp" />
<TextView
android:id="#+id/meal3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="1dp"
android:layout_marginBottom="1dp"
android:gravity="center"
android:text="3"
android:textColor="#000000"
android:textSize="20sp" />
<TextView
android:id="#+id/meal4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="1dp"
android:layout_marginBottom="1dp"
android:gravity="center"
android:text="4"
android:textColor="#000000"
android:textSize="20sp" />
</TableRow>
</TableLayout>
</RelativeLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:orientation="horizontal">
<Button
android:id="#+id/Create"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Make Text!" />
</LinearLayout>
This is my expect :
Click 'Create' Button
new TextView is added in mealRow (Tablerow)
but the actual output is 'Nothing happened'.
You should use TableRow.LayoutParams than ViewGroup.LayoutParams.
This is because TextView goes into TableRow.
If TextView goes into RelativeLayout, you should use RelativeLayout.LayoutParams.
i have builded an app that works perfectly on android with api higer than 21. The problem is that this instruction of my code:
mFragmentTransaction.replace(R.id.content_frame, new TabFragment()).commit();
Works in different way on API less then 21.
On Api less then 21 the new fragment hide the previus activity, so that i can't click on my Floating Action Button.
Here are two images that explain in abetter way my problem.
API HIGER THAN 21
API LESS THAN 21
So my question is: How can i have the same result in API less then 21 that i have on API Higer then 21?
Here is the affected part of the Main Activity Code:
public class MainActivity extends AppCompatActivity {
public static AppDataBase appDataBase;
public static UserDataBase userDataBase;
static FragmentManager mFragmentManager;
static FragmentTransaction mFragmentTransaction;
private DrawerLayout myDrawerLayout;
final String TXT_MAINACTVT_USER_HAVE_NOT_ADDED_CONSOLE = "Add a console!";
TextView currentConsole;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
appDataBase = new AppDataBase(this);
userDataBase = new UserDataBase(this);
myDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
currentConsole = (TextView) findViewById(R.id.txt_Mainactvt_currentConsole);
currentConsole.setText(TXT_MAINACTVT_USER_HAVE_NOT_ADDED_CONSOLE);
tabLayoutManagement();
floatingActionButtonManagement();
leftDrawerMenuManagement();
rigthDrawerMenuManagement();
populateMyConsole();
}
void tabLayoutManagement() {
mFragmentManager = getSupportFragmentManager();
mFragmentTransaction = mFragmentManager.beginTransaction();
mFragmentTransaction.replace(R.id.content_frame, new TabFragment()).commit();
}
// Floating Action Button
private void floatingActionButtonManagement() {
FloatingActionButton fab_addGame = (FloatingActionButton)findViewById(R.id.fab_AddGame);
fab_addGame.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
/*
The currentConsole TextView is used to show at the user wich console is selected.
We use it to have a strng that conteins the selected console.
Call the method that manage the click event of the FloatingActionButton. We pass the console name.
*/
String currentConsoleName = currentConsole.getText().toString();
floatingActionButtonClickEvent(currentConsoleName);
}
});
}
private void floatingActionButtonClickEvent(String currentConsoleName) {
/*
Check if user have added a console. If he did start a menu for adding games, else start an
error message
*/
if (!currentConsoleName.equals(TXT_MAINACTVT_USER_HAVE_NOT_ADDED_CONSOLE)) {
popUpViewAddGameBuild(currentConsoleName);
}
else
mySimpleAlertDialogMethod("Attention!", "Before you enter game, you must enter a console.", true, true);
}
private void popUpViewAddGameBuild(String currentConsoleName) {
/*
Build the view that show the menu for adding games.
*/
LayoutInflater inflater = this.getLayoutInflater();
View popupView = inflater.inflate(R.layout.popupview_addgame, null);
PopupWindow popupWindow = new PopupWindow(
popupView,
WindowManager.LayoutParams.MATCH_PARENT,
WindowManager.LayoutParams.MATCH_PARENT);
popupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED);
popupWindow.setFocusable(true);
popupWindow.showAtLocation(popupView, 0, 0, 0);
}
Here is the TabLayout Class:
public class TabFragment extends Fragment {
public static TabLayout tabLayout;
public static ViewPager viewPager;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View x = inflater.inflate(R.layout.tab_layout, null);
tabLayout = (TabLayout) x.findViewById(R.id.tabs);
viewPager = (ViewPager) x.findViewById(R.id.viewpager);
viewPager.setAdapter(new MyAdapter(getChildFragmentManager()));
tabLayout.post(new Runnable() {
#Override
public void run() {
tabLayout.setupWithViewPager(viewPager);
}
});
return x;
}
public class MyAdapter extends FragmentPagerAdapter {
public int position;
public MyAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
switch (position){
case 0 :
return new DesireFragment();
case 1 :
return new BuyedFragment();
case 2 :
return new StartedFragment();
case 3 :
return new FinishedFragment();
case 4 :
return new AllTrophiesFragment();
}
return null;
}
#Override
public int getCount() {
return 5;
}
#Override
public CharSequence getPageTitle(int position) {
switch (position){
case 0 :
return "Desire";
case 1 :
return "Buyed";
case 2 :
return "Started";
case 3 :
return "Finished";
case 4 :
return "AllTrophies";
}
return null;
}
}
}
There is the layout of the MainActivity:
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
android:layout_gravity="end"
android:orientation="vertical">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v7.widget.Toolbar
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/colorPrimary"
android:id="#+id/toolbar"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"
app:navigationIcon="#drawable/ic_menu_white_24dp"
app:title="MyGames">
<Button
android:id="#+id/btnOpenRigthDrawer"
android:background="#drawable/ic_filter_list_white_24dp"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_marginRight="10dp"
android:layout_gravity="right" />
<Button
android:id="#+id/btnOpenOptions"
android:background="#drawable/ic_settings_white_24dp"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_marginRight="17dp"
android:layout_gravity="right" />
</android.support.v7.widget.Toolbar>
</RelativeLayout>
<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scrollIndicators="bottom">
<FrameLayout
android:id="#+id/content_frame"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:backgroundTint="#color/colorPrimary"
app:borderWidth="0dp">
<TextView
android:layout_width="wrap_content"
android:layout_height="30dp"
android:textAppearance="?android:attr/textAppearanceLarge"
android:id="#+id/txt_Mainactvt_currentConsole"
android:layout_gravity="center_horizontal|top"
android:layout_marginTop="50dp"/>
<android.support.design.widget.FloatingActionButton
android:id="#+id/fab_AddGame"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="17dp"
android:layout_marginRight="17dp"
android:src="#drawable/ic_mode_edit_white_24dp"
android:layout_gravity="bottom|right"
android:background="#color/colorPrimary" />
</FrameLayout>
<include
layout="#layout/drawer_left"
android:id="#+id/layLeft"
android:layout_gravity="start"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scrollbars="vertical"/>
<include
layout="#layout/drawer_rigth"
android:id="#+id/layRigth"
android:layout_gravity="end"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#ffffff"
android:scrollbars="vertical"
/>
</android.support.v4.widget.DrawerLayout>
And here is the layout code of the TabLayout:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:orientation="vertical"
android:layout_height="wrap_content">
<android.support.design.widget.TabLayout
android:id="#+id/tabs"
app:tabGravity="fill"
app:tabMode="scrollable"
android:background="#color/colorPrimary"
app:tabIndicatorColor="#android:color/holo_orange_dark"
app:tabSelectedTextColor="#android:color/holo_orange_dark"
app:tabTextColor="#android:color/white"
android:layout_width="match_parent"
android:layout_height="wrap_content"
>
</android.support.design.widget.TabLayout>
<android.support.v4.view.ViewPager
android:id="#+id/viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent">
</android.support.v4.view.ViewPager>
You replace the content of your FrameLayout with an Fragment. this leads to your strange result.
Add a Layout to your Framelayout instead and use it as your FragmentContainer:
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
app:backgroundTint="#color/colorPrimary"
app:borderWidth="0dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/content_frame"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="30dp"
android:textAppearance="?android:attr/textAppearanceLarge"
android:id="#+id/txt_Mainactvt_currentConsole"
android:layout_gravity="center_horizontal|top"
android:layout_marginTop="50dp"/>
<android.support.design.widget.FloatingActionButton
android:id="#+id/fab_AddGame"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="17dp"
android:layout_marginRight="17dp"
android:src="#drawable/ic_mode_edit_white_24dp"
android:layout_gravity="bottom|right"
android:background="#color/colorPrimary" />
</FrameLayout>
Try to place your FrameLayout with this button to the end of layout
I am using fragments. I have an textview in fragment and I want to get value in main activity.
This is my fragment layout
<GridLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/GridLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginBottom="30dp"
android:layout_marginEnd="50dp"
android:layout_marginStart="55dp"
android:layout_marginTop="10dp"
android:columnCount="20"
android:orientation="horizontal"
android:rowCount="16"
tools:context="com.lipi.worldofelements.MainFragment">
<Space
android:layout_width="25dp"
android:layout_height="35dp"
android:layout_column="2"
android:layout_row="2"
android:background="#color/colorButtonNobelGasses" />
<LinearLayout
android:layout_width="505dp"
android:layout_height="165dp"
android:layout_column="4"
android:layout_columnSpan="13"
android:layout_margin="5dp"
android:layout_row="2"
android:layout_rowSpan="5"
android:orientation="horizontal"
>
<RelativeLayout
android:id="#+id/btnElement"
android:layout_width="165dp"
android:layout_height="match_parent"
android:background="#color/colorButtonNonmetals"
android:clickable="true"
>
<TextView
android:id="#+id/txtElemSym"
style="#style/AppTheme"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginBottom="25dp"
android:clickable="true"
android:gravity="center"
android:linksClickable="true"
android:onClick="btnClikcedToast"
android:text="#string/H"
android:textColor="#ffff"
android:textSize="#dimen/buttonXL"
/>
I am loading fragment with this function inside my MainActivity.java:
//Set the fragment activity
MainFragment fragment = new MainFragment();
FragmentTransaction fragmentTransaction =
getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.fragment_container, fragment);
fragmentTransaction.commit();
This my fragment class
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container, false);
databaseHelper = new ElementDatabaseAdapter(getActivity());
txtElemSym = (TextView) rootView.findViewById(R.id.txtElemSym);
return rootView;
When I click the textview(txtElemSym) main activity runs "btnClikcedToast" function inside my MainActivity .
public void btnClikcedToast(View view) {
txtSymbol = (TextView) findViewById(R.id.txtElemSym);
String ElemSymbol = (String) txtSymbol.getText();
Bundle b;
Intent i = new Intent(this, SingleElementData.class);
b = ActivityOptions.makeScaleUpAnimation(view, 0, 0, view.getWidth(), view.getHeight()).toBundle();
i.putExtra("symbol", ElemSymbol);
startActivity(i, b);
}
I want to get textvalue in this function. I got an error "NullPointerException" after I run this.
How can I do this?