ViewPager2 with RecyclerView not displaying correctly

ViewPager2 with RecyclerView not displaying correctly - java

I've been working on an app that uses a vertical RecyclerView inside a fragment, all inside a ViewPager2 object with a tabLayout. I can't seem to figure out how to make all these things work together. Currently, it looks like I got it to show the recycler view with the data but the tabs aren't showing up and the items in the list are spaced like they're different pages. Could someone explain how I'm messing up?
It looks like this:
I'd like it to be like this:
Here's the code so far:
Classes
MainActivity.java
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.viewpager2.widget.ViewPager2;
import android.os.Bundle;
import com.google.android.material.tabs.TabLayout;
import com.google.android.material.tabs.TabLayoutMediator;
import com.mapbox.mapboxsdk.Mapbox;
import com.mapbox.mapboxsdk.maps.MapView;
import com.mapbox.mapboxsdk.maps.Style;
public class MainActivity extends AppCompatActivity {
private MapView mapView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Mapbox Access token
Mapbox.getInstance(getApplicationContext(), getString(R.string.mapbox_api_key));
setContentView(R.layout.activity_main);
mapView = findViewById(R.id.mapView);
mapView.onCreate(savedInstanceState);
mapView.getMapAsync(mapboxMap -> mapboxMap.setStyle(Style.DARK, style -> {
// Map is set up and the style has loaded. Now you can add data or make other map adjustments
}));
ViewPager2 pager = findViewById(R.id.view_pager);
ViewPageAdapter pageAdapter = new ViewPageAdapter(getSupportFragmentManager(), getLifecycle());
pager.setAdapter(pageAdapter);
pager.setOrientation(ViewPager2.ORIENTATION_HORIZONTAL);
TabLayout tabLayout = findViewById(R.id.tabLayout2);
tabLayout.setTabMode(TabLayout.MODE_SCROLLABLE);
new TabLayoutMediator(tabLayout, pager,
(tab, position) -> {
switch (position) {
case 0:
tab.setText(getString(R.string.stats_tab));
break;
case 1:
tab.setText(getString(R.string.news_tab));
break;
case 2:
tab.setText(getString(R.string.symptoms_tab));
break;
case 3:
tab.setText(getString(R.string.safety_tab));
break;
default:
break;
}
}).attach();
// Get data
new StatsLoader("https://api.covid19api.com/summary", pageAdapter, pager).execute();
}
}
StatsFragment.java
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import org.json.JSONArray;
public class StatsFragment extends Fragment {
View view;
RecyclerView recyclerView;
JSONArray covidData;
public StatsFragment(JSONArray data) {
covidData = data;
}
#Nullable
#Override
public View onCreateView(#NonNull LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
view = inflater.inflate(R.layout.view_page, container, false);
recyclerView = view.findViewById(R.id.recyclerView2);
LinearLayoutManager layoutManager = new LinearLayoutManager(getActivity());
recyclerView.setLayoutManager(layoutManager);
recyclerView.setHasFixedSize(false);
RecyclerView.Adapter<CustomListAdapter.ListViewHolder> mAdapter = new CustomListAdapter(covidData);
recyclerView.setAdapter(mAdapter);
return view;
}
}
StatsLoader.java
import android.os.AsyncTask;
import android.util.Log;
import androidx.annotation.Nullable;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import javax.net.ssl.HttpsURLConnection;
public class StatsLoader extends AsyncTask<String, Void, JSONArray> {
Exception exception;
String urlString = "";
static JSONArray covidData = new JSONArray();
ViewPageAdapter pageAdapter;
public StatsLoader(String url, ViewPageAdapter adapter) {
super();
urlString = url;
pageAdapter = adapter;
}
#Nullable
#Override
public JSONArray doInBackground(String ... urls) {
HttpsURLConnection connection = null;
BufferedReader reader = null;
try {
URL url = new URL(urlString);
connection = (HttpsURLConnection) url.openConnection();
connection.connect();
InputStream inputStream = connection.getInputStream();
reader = new BufferedReader(new InputStreamReader(inputStream));
StringBuilder buffer = new StringBuilder();
String line = "";
while ((line = reader.readLine()) != null) {
buffer.append(line);
}
JSONObject json = new JSONObject(buffer.toString());
covidData = json.getJSONArray("Countries");
ArrayList<Object> list = new ArrayList<>();
for (int i = 0; i < covidData.length(); i++) {
list.add(covidData.get(i));
}
SortJsonArray sortJsonArray = new SortJsonArray();
sortJsonArray.sortArray(list, "TotalConfirmed", false);
covidData = new JSONArray();
for (Object object : list) {
covidData.put(object);
}
return covidData;
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
} finally {
if (connection != null) {
connection.disconnect();
}
try {
if (reader != null) {
reader.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
protected void onPostExecute(JSONArray coviddata) {
if (this.exception == null) {
Log.d("Check", "Works!");
pageAdapter.addFragment(new StatsFragment(coviddata), "Stats");
}
}
}
Layouts
activity_main
<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayout 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">
<com.google.android.material.appbar.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<com.google.android.material.appbar.CollapsingToolbarLayout
android:id="#+id/collapsing_toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="top"
android:fitsSystemWindows="true"
app:contentScrim="?attr/colorPrimary"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
app:statusBarScrim="#null"
app:titleEnabled="false"
android:minHeight="?attr/actionBarSize" >
<fragment
android:id="#+id/mapView"
android:name="com.mapbox.mapboxsdk.maps.MapFragment"
android:layout_width="match_parent"
android:layout_height="350sp"
android:apiKey="#string/mapbox_api_key"
android:clickable="true"
android:enabled="true"
android:focusable="true"
app:layout_collapseMode="parallax" />
<androidx.appcompat.widget.Toolbar
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:layout_marginBottom="48dp"
android:gravity="top"
app:layout_collapseMode="pin"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
app:popupTheme="#style/ThemeOverlay.AppCompat.Dark"
app:title="" />
<com.google.android.material.tabs.TabLayout
android:id="#+id/tabLayout2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="parent">
</com.google.android.material.tabs.TabLayout>
</com.google.android.material.appbar.CollapsingToolbarLayout>
</com.google.android.material.appbar.AppBarLayout>
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
<androidx.viewpager2.widget.ViewPager2
android:id="#+id/view_pager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="parent"
tools:listitem="#layout/view_page" >
</androidx.viewpager2.widget.ViewPager2>
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.coordinatorlayout.widget.CoordinatorLayout>
view_page
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools">
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/recyclerView2"
android:layout_width="0dp"
android:layout_height="match_parent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="parent"
tools:listitem="#layout/list_view">
</androidx.recyclerview.widget.RecyclerView>
</androidx.constraintlayout.widget.ConstraintLayout>
list_view
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.cardview.widget.CardView
android:id="#+id/card_view"
android:layout_gravity="center"
android:layout_width="match_parent"
android:layout_height="wrap_content"
card_view:cardCornerRadius="14sp"
android:layout_margin="15sp">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="40sp">
<ImageView
android:id="#+id/image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toLeftOf="#+id/name"
android:layout_toStartOf="#+id/name"
android:contentDescription="Image of country flag" />
<TextView
android:id="#+id/name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingBottom="10sp" />
<TextView
android:id="#+id/cases"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/name" />
</RelativeLayout>
</androidx.cardview.widget.CardView>
</LinearLayout>

for tablayout :
take/make tablayout outside the CollapsingToolbarLayout
and for "list are spaced" :
make wrap_content height in view_page code
also list_view LinearLayout height to wrap_content
hope it helped :)

In your list_view , Use your parent layout height wrap_content not match_parent
<androidx.cardview.widget.CardView
android:id="#+id/card_view"
android:layout_gravity="center"
android:layout_width="match_parent"
android:layout_height="wrap_content"
card_view:cardCornerRadius="14sp"
android:layout_margin="15sp">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="40sp">
<ImageView
android:id="#+id/image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toLeftOf="#+id/name"
android:layout_toStartOf="#+id/name"
android:contentDescription="Image of country flag" />
<TextView
android:id="#+id/name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingBottom="10sp" />
<TextView
android:id="#+id/cases"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/name" />
</RelativeLayout>
</androidx.cardview.widget.CardView>

Related

Getting duplicated cardviews using SwipeRefresh Layout

So here is my problem, I got an API that gives me the lastest news of many sources. Each one of them goes with a cardview. The problem here is, while I'm using the swipeRefresh, it gets duplicated cardViews with the same news, like if I have 10 news, it duplicates to 20 with the same ones.
Here is my code where I apply the swipeRefresh:
package com.example.newsapp4;
import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import androidx.swiperefreshlayout.widget.SwipeRefreshLayout;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;
import com.example.newsapp4.Model.Articles;
import com.example.newsapp4.Model.Headlines;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;
public class bbcnews extends AppCompatActivity {
Adapter adapter;
Intent intencion;
RecyclerView recyclerView;
public static String source = "My Source";
public static String API_KEY = "My API Key";
SwipeRefreshLayout srl;
List<Articles> articles = new ArrayList<>();
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_bbcnews);
srl = findViewById(R.id.swipeRefresh);
srl.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
#Override
public void onRefresh() {
retrieveJson(source, API_KEY);
}
});
recyclerView = findViewById(R.id.recyclerView1);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
adapter = new Adapter(bbcnews.this,articles);
recyclerView.setAdapter(adapter);
retrieveJson(source, API_KEY);
}
public void retrieveJson(String source, String apiKey){
srl.setRefreshing(true);
Call<Headlines> call = ApiClient.getInstance().getApi().getHeadlines(source, apiKey);
call.enqueue(new Callback<Headlines>() {
#Override
public void onResponse(Call<Headlines> call, Response<Headlines> response) {
if(response.isSuccessful() && response.body().getArticles() != null){
srl.setRefreshing(false);
articles.clear();
articles = response.body().getArticles();
adapter.setArticles(articles);
}
}
#Override
public void onFailure(Call<Headlines> call, Throwable t) {
srl.setRefreshing(false);
Toast.makeText(bbcnews.this, t.getLocalizedMessage(), Toast.LENGTH_SHORT).show();
}
});
}
public String getCountry(){
Locale locale = Locale.getDefault();
String country = locale.getCountry();
return country.toLowerCase();
}
public void aPerfil(View vista){
intencion = new Intent(this, profile_activity.class);
startActivity(intencion);
}
}
I don't think that I need to put the xml code with the progressbar and the swipeRefresh but here are both:
This one is the Items.xml where I created the cardView:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
xmlns:app="http://schemas.android.com/apk/res-auto">
<androidx.cardview.widget.CardView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="10dp"
app:cardElevation="4dp"
android:id="#+id/cardView"
app:cardCornerRadius="10dp">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="200dp">
<ProgressBar
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:id="#+id/loader"/>
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/image"
android:scaleType="centerCrop"
android:src="#drawable/img"/>
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/gradient" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TITLE"
android:textSize="20dp"
android:padding="10dp"
android:fontFamily="#font/g_bold"
android:textColor="#color/white"
android:id="#+id/tvTitle"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:orientation="horizontal">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Source"
android:textSize="16dp"
android:padding="10dp"
android:ems="15"
android:fontFamily="#font/g_light"
android:textColor="#color/white"
android:id="#+id/tvSource"/>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fontFamily="#font/g_light"
android:gravity="right"
android:text="Date"
android:textColor="#color/white"
android:padding="10dp"
android:textSize="16dp"
android:id="#+id/tvDate"/>
</LinearLayout>
</FrameLayout>
</androidx.cardview.widget.CardView>
</LinearLayout>
And here the one with the swipeRefresh in the recyclerView:
<?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"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="#color/white"
tools:context=".bbcnews">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="DINGO BBC NEWS"
android:textColor="#color/black"
android:textSize="20sp"
android:fontFamily="#font/g_bold"
android:background="#color/white"
android:padding="10dp"
android:textAlignment="center"/>
<GridLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:paddingTop="10dp"
android:paddingBottom="10dp"
android:columnCount="2"
android:paddingLeft="20dp"
android:paddingRight="5dp"
android:background="#drawable/black_background"
android:rowCount="2">
<EditText
android:id="#+id/editTextTextPersonName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ems="10"
android:hint="Search"
android:textColor="#color/grey"
android:textColorHint="#color/grey"
android:padding="5dp"
android:layout_column="0"
android:background="#drawable/black_background"
android:layout_row="0"
android:layout_columnWeight="1"
android:inputType="textPersonName" />
<Button
android:id="#+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingRight="20dp"
android:background="#drawable/black_background"
android:drawableRight="#drawable/ic_baseline_search_24"
android:layout_column="1"
android:layout_row="0"/>
</GridLayout>
<androidx.swiperefreshlayout.widget.SwipeRefreshLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/swipeRefresh">
<androidx.recyclerview.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="5dp"
android:id="#+id/recyclerView1"/>
</androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
</LinearLayout>
Also this is my adapter.java code:
package com.example.newsapp4;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import androidx.annotation.NonNull;
import androidx.cardview.widget.CardView;
import androidx.recyclerview.widget.RecyclerView;
import com.example.newsapp4.Model.Articles;
import com.squareup.picasso.Picasso;
import java.util.List;
public class Adapter extends RecyclerView.Adapter<Adapter.ViewHolder> {
Context context;
List<Articles> articles;
public Adapter(Context context, List<Articles> articles) {
this.context = context;
this.articles = articles;
}
#NonNull
#Override
public ViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.items, parent, false);
return new ViewHolder(view);
}
#Override
public void onBindViewHolder(#NonNull ViewHolder holder, int position) {
final Articles a = articles.get(position);
String imageUrl = a.getUrlToImage();
holder.tvTitle.setText(a.getTitle());
holder.tvSource.setText(a.getSource().getName());
holder.tvDate.setText(a.getPublishedAt());
Picasso.with(context).load(imageUrl).into(holder.imageView);
}
#Override
public int getItemCount() {
return articles.size();
}
public static class ViewHolder extends RecyclerView.ViewHolder {
TextView tvTitle,tvSource,tvDate;
ImageView imageView;
CardView cardView;
public ViewHolder(#NonNull View itemView) {
super(itemView);
tvTitle = itemView.findViewById(R.id.tvTitle);
tvSource = itemView.findViewById(R.id.tvSource);
tvDate = itemView.findViewById(R.id.tvDate);
imageView = itemView.findViewById(R.id.image);
cardView = itemView.findViewById(R.id.cardView);
}
}
public void setArticles(List<Articles> articles) {
this.articles.addAll(articles);
int count = getItemCount();
notifyItemRangeInserted(count, count + articles.size());
}
}
Thanks for your time!

// Clear adapter list before add to list.
public void setArticles(List<Articles> articles) {
if(this.articles!=null && this.articles.size()>0)
this.articles.clear();
this.articles.addAll(articles);
int count = getItemCount();
notifyItemRangeInserted(count, count + articles.size());
}

From what I can understand in your code is on the success of API call after Swipe Refresh which is this section here
articles.clear();
articles = response.body().getArticles();
adapter.setArticles(articles);
You are here clearing the article inside your activity, but the thing is inside your Adapter there is already another list of articles, you are not clearing them.
And then when you make the adapter.setArticles(articles); call, inside the following function, your articles get added to the already existing list of articles and thus, the duplicate list.
public void setArticles(List<Articles> articles) {
this.articles.addAll(articles);
int count = getItemCount();
notifyItemRangeInserted(count, count + articles.size());
}
To fix this you can make the following modifications to your function.
public void setArticles(List<Articles> articles, boolean clearAll) {
if(clearAll){ this.articles.clear(); }
this.articles.addAll(articles);
notifyDataSetChanged();
}
And then modify your function call as follows
adapter.setArticles(articles, true);
That way when the Boolean is true, it will clear the existing list. Also I would suggest you to replace the insert call with data set change call. Else you can make a separate function all together for adding elements and for clearing existing elements.

Showing logo from json to listview

I want to show logo from json but it doesn't work. Check my code and inform me about the bug. Else app name and description working fine. They only problem is that it now showing logo. Json is passing the link of that logo. I also use Glide but it doesn't work for me. I done all thing to fix it but i am unable for fix it. All code related to this is below. Please have a look at it
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import androidx.appcompat.app.AppCompatActivity;
import com.squareup.picasso.Picasso;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
import java.util.HashMap;
public class BrandshaperActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_brandshaper);
new ParseTask().execute();
}
private class ParseTask extends AsyncTask<Void, Void, String> {
HttpURLConnection urlConnection = null;
BufferedReader reader = null;
String resultJson = "";
#Override
protected String doInBackground(Void... params) {
try {
String $url_json = "https://myapi.ga";
URL url = new URL($url_json);
urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setRequestMethod("POST");
urlConnection.connect();
InputStream inputStream = urlConnection.getInputStream();
StringBuffer buffer = new StringBuffer();
reader = new BufferedReader(new InputStreamReader(inputStream));
String line;
while ((line = reader.readLine()) != null) {
buffer.append(line);
}
resultJson = buffer.toString();
Log.d("FOR_LOG", resultJson);
} catch (Exception e) {
e.printStackTrace();
}
return resultJson;
}
protected void onPostExecute(String strJson) {
super.onPostExecute(strJson);
final ListView lView = (ListView) findViewById(R.id.lvMain);
String[] from = {"app_name","desc","app_logo"};
int[] to = {R.id.app_name,R.id.desc,R.id.app_logo};
ArrayList<HashMap<String, String>> arrayList = new ArrayList<HashMap<String, String>>();
HashMap<String, String> hashmap;
try {
JSONObject json = new JSONObject(strJson);
JSONArray jArray = json.getJSONArray("offers");
for (int i = 0; i < jArray.length(); i++) {
JSONObject friend = jArray.getJSONObject(i);
String appname = friend.getString("name");
String description = friend.getString("description");
String applogo = friend.getString("icon");
Picasso.get().load(arrayList.get(position).getThumbnailUrl(applogo)).into(app);
hashmap = new HashMap<String, String>();
hashmap.put("app_name", "" + appname);
hashmap.put("desc", "" + description);
arrayList.add(hashmap);
}
final SimpleAdapter adapter = new SimpleAdapter(BrandshaperActivity.this, arrayList, R.layout.brandshaper_item,from , to);
lView.setAdapter(adapter);
} catch (JSONException e) {
e.printStackTrace();
}
}
}
}
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:background="#FFF"
android:gravity="left">
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginRight="4dp"
android:layout_marginLeft="4dp"
android:orientation="vertical">
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:padding="12dp">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:layout_gravity="center"
android:orientation="horizontal">
<ImageView
android:id="#+id/app_logo"
android:layout_width="50dp"
android:layout_height="50dp"
android:paddingStart="3dp"
android:src="#drawable/img_bigcash">
</ImageView>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:layout_gravity="center"
android:orientation="vertical">
<TextView
android:id="#+id/app_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:fontFamily="#font/avenirblack"
android:text="BigCash"
android:gravity="center"
android:textColor="#color/black"
android:textSize="18dp" />
<TextView
android:id="#+id/desc"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:fontFamily="#font/montserrat_regular"
android:text="Install & Sign up to 200 coins"
android:gravity="center"
android:textColor="#color/black"
android:textSize="12dp" />
</LinearLayout>
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="end">
<ImageView
android:layout_width="30dp"
android:layout_height="30dp"
android:src="#drawable/arrow"></ImageView>
</LinearLayout>
</LinearLayout>
</LinearLayout>
?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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">
<ListView
android:id="#+id/lvMain"
android:layout_width="368dp"
android:layout_height="495dp"
tools:layout_editor_absoluteX="8dp"
tools:layout_editor_absoluteY="8dp" />
</RelativeLayout>

Create a search activity like in instagram and twitter

In my project I want the search activity to display two types of data in the search activity (restaurants and meals) and I want to implement it like in Twitter and Instagram, my approach is as follows:
in the search activity I created two fragments with each one having a simple list view, my data gets displayed when launching the app but list views don't display all the items at ones, instead, it makes them scroll (in Instagram search activity it shows the suggested and recent items with full height)
this is the code
search activity:
package com.byshy.light.Activities;
import android.content.pm.ActivityInfo;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.WindowManager;
import com.byshy.light.Fragments.SearchRestaurantsFragment;
import com.byshy.light.R;
import com.byshy.light.SearchMealsFragment;
public class SearchActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_search);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_VISIBLE);
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.search_restaurants_frag, new SearchRestaurantsFragment()).commit();
FragmentTransaction transaction2 = getSupportFragmentManager().beginTransaction();
transaction2.replace(R.id.search_meals_frag, new SearchMealsFragment()).commit();
}
}
search activity xml:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".Activities.SearchActivity">
<FrameLayout
android:layout_alignParentTop="true"
android:id="#+id/search_container"
android:layout_width="match_parent"
android:layout_height="56dp"
android:background="#color/colorPrimary"
android:transitionName="search_bar">
<EditText
android:id="#+id/main_screen_search_bar"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginStart="10dp"
android:layout_marginTop="7dp"
android:layout_marginEnd="10dp"
android:layout_marginBottom="7dp"
android:background="#drawable/curved_layout"
android:hint="#string/search"
android:inputType="text"
android:padding="10dp" />
</FrameLayout>
<ScrollView
android:layout_alignParentBottom="true"
android:layout_below="#id/search_container"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<FrameLayout
android:id="#+id/search_restaurants_frag"
android:layout_width="match_parent"
android:layout_height="wrap_content">
</FrameLayout>
<FrameLayout
android:id="#+id/search_meals_frag"
android:layout_width="match_parent"
android:layout_height="wrap_content">
</FrameLayout>
</LinearLayout>
</ScrollView>
</RelativeLayout>
restaurants fragment:
package com.byshy.light.Fragments;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import com.byshy.light.R;
public class SearchRestaurantsFragment extends Fragment {
ListView lv1;
public SearchRestaurantsFragment() {
// Required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View root = inflater.inflate(R.layout.fragment_search_restaurants, container, false);
lv1 = root.findViewById(R.id.search_restaurants_list_view);
String[] items1 = new String[3];
items1[0] = "res1";
items1[1] = "res2";
items1[2] = "res3";
ArrayAdapter<String> aa1 = new ArrayAdapter<>(getContext(), android.R.layout.simple_list_item_1, items1);
lv1.setAdapter(aa1);
return root;
}
}
meals fragment:
package com.byshy.light;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ListView;
public class SearchMealsFragment extends Fragment {
ListView lv2;
public SearchMealsFragment() {
// Required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View root = inflater.inflate(R.layout.fragment_search_meals, container, false);
lv2 = root.findViewById(R.id.search_meals_list_view);
String[] items2 = new String[10];
items2[0] = "meal1";
items2[1] = "meal2";
items2[2] = "meal3";
items2[3] = "meal4";
items2[4] = "meal5";
items2[5] = "meal6";
items2[6] = "meal7";
items2[7] = "meal8";
items2[8] = "meal9";
items2[9] = "meal10";
ArrayAdapter<String> aa2 = new ArrayAdapter<>(getContext(), android.R.layout.simple_list_item_1, items2);
lv2.setAdapter(aa2);
return root;
}
}
the fragments xml is basically the same with some id differences so I will post just one:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".SearchMealsFragment">
<RelativeLayout
android:id="#+id/small_search_restaurants_bar"
android:layout_width="match_parent"
android:layout_height="35dp"
android:background="#color/white"
android:clickable="true"
android:focusable="true"
android:foreground="?android:attr/selectableItemBackground">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_marginStart="10dp"
android:text="#string/meals"
android:textSize="15sp"
android:textStyle="bold" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_centerVertical="true"
android:layout_marginEnd="10dp"
android:text="#string/more"
android:textColor="#color/colorPrimaryDark"
android:textSize="15sp" />
</RelativeLayout>
<ListView
android:id="#+id/search_meals_list_view"
android:layout_width="match_parent"
android:layout_height="match_parent">
</ListView>
</LinearLayout>

after not finding anything useful on the internet I came up with a new approach to solve this problem.
my new approach is more efficient and it works by creating a model for search results which contains a string and an integer to indicate if the view is a header or a result, then created a item view that contains a linear layout that gets hidden if the view is a not a header, this logic is done inside the adapter.
this is the code:
this is the search_item.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="50dp"
android:orientation="horizontal"
android:clickable="false"
android:focusable="false"
android:foreground="?android:attr/selectableItemBackground">
<LinearLayout
android:orientation="vertical"
android:id="#+id/search_item_back_bar"
android:layout_width="match_parent"
android:layout_centerVertical="true"
android:background="#color/colorPrimary"
android:layout_height="2dp">
</LinearLayout>
<TextView
android:background="#f9f9f9"
android:layout_marginStart="16dp"
android:paddingStart="5dp"
android:paddingEnd="5dp"
android:id="#+id/search_result"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:gravity="center"
android:text="#string/test"
android:textSize="20sp" />
</RelativeLayout>
new searchActivity.xml
<?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"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".Activities.SearchActivity">
<FrameLayout
android:id="#+id/search_container"
android:layout_width="match_parent"
android:layout_height="56dp"
android:background="#color/colorPrimary"
android:transitionName="search_bar">
<EditText
android:id="#+id/main_screen_search_bar"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginStart="10dp"
android:layout_marginTop="7dp"
android:layout_marginEnd="10dp"
android:layout_marginBottom="7dp"
android:background="#drawable/curved_layout"
android:hint="#string/search"
android:inputType="text"
android:padding="10dp" />
</FrameLayout>
<android.support.v7.widget.RecyclerView
android:id="#+id/search_activity_results"
android:layout_width="match_parent"
android:layout_height="match_parent">
</android.support.v7.widget.RecyclerView>
</LinearLayout>
searchActivity.java
package com.byshy.light.Activities;
import android.content.pm.ActivityInfo;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.WindowManager;
import com.byshy.light.Adapters.SearchResultsAdapter;
import com.byshy.light.Models.SearchResult;
import com.byshy.light.R;
import java.util.ArrayList;
public class SearchActivity extends AppCompatActivity {
private RecyclerView searchRV;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_search);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_VISIBLE);
searchRV = findViewById(R.id.search_activity_results);
searchRV.setHasFixedSize(true);
searchRV.setLayoutManager(new LinearLayoutManager(this));
ArrayList<SearchResult> results = new ArrayList<>();
results.add(new SearchResult("Restaurants", 1));
results.add(new SearchResult("res1"));
results.add(new SearchResult("res2"));
results.add(new SearchResult("res3"));
results.add(new SearchResult("Meals", 1));
results.add(new SearchResult("meal1"));
results.add(new SearchResult("meal2"));
results.add(new SearchResult("meal3"));
results.add(new SearchResult("meal4"));
results.add(new SearchResult("meal5"));
results.add(new SearchResult("meal6"));
SearchResultsAdapter adapter = new SearchResultsAdapter(results);
searchRV.setAdapter(adapter);
}
}
SearchResultsAdapter.java
package com.byshy.light.Adapters;
import android.support.annotation.NonNull;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.LinearLayout;
import android.widget.TextView;
import com.byshy.light.Models.SearchResult;
import com.byshy.light.R;
import java.util.ArrayList;
public class SearchResultsAdapter extends RecyclerView.Adapter<SearchResultsAdapter.SearchResultViewHolder> {
private ArrayList<SearchResult> mData;
public SearchResultsAdapter(ArrayList<SearchResult> data) {
mData = data;
}
#NonNull
#Override
public SearchResultViewHolder onCreateViewHolder(#NonNull ViewGroup viewGroup, int i) {
View v = LayoutInflater.from(viewGroup.getContext())
.inflate(R.layout.search_item, viewGroup, false);
return new SearchResultViewHolder(v);
}
#Override
public void onBindViewHolder(#NonNull SearchResultViewHolder searchResultViewHolder, int i) {
SearchResult searchResult = mData.get(i);
searchResultViewHolder.result.setText(searchResult.getContent());
if (searchResult.getType() == 0) {
searchResultViewHolder.backBar.setVisibility(View.GONE);
searchResultViewHolder.setClickable(true);
ViewGroup.MarginLayoutParams params = (ViewGroup.MarginLayoutParams) searchResultViewHolder.result.getLayoutParams();
params.leftMargin = 8;
}
}
#Override
public int getItemCount() {
return mData.size();
}
class SearchResultViewHolder extends RecyclerView.ViewHolder {
private TextView result;
private LinearLayout backBar;
private View view;
public SearchResultViewHolder(#NonNull View itemView) {
super(itemView);
view = itemView;
result = itemView.findViewById(R.id.search_result);
backBar = itemView.findViewById(R.id.search_item_back_bar);
}
public void setClickable(boolean clickable) {
view.setClickable(clickable);
view.setFocusable(clickable);
}
}
}
the end product

Android: onItemClick and onItemLongClick do not respond

My Android app is composed of an SQLite database which populates individual ListView items with data user saves. Those items are available for display in activity_main.xml.
I have a class called RecordsListFragment which contains the two problematic methods: onItemClick and onItemLongClick. Here is the class in its entirety:
package com.example.benignfella.projectworkinghoursapplication.Fragment;
import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AdapterView.OnItemLongClickListener;
import com.example.benignfella.projectworkinghoursapplication.R;
import com.example.benignfella.projectworkinghoursapplication.Adapter.RecordsListAdapter;
import com.example.benignfella.projectworkinghoursapplication.Database.RecordsDAO;
import com.example.benignfella.projectworkinghoursapplication.GetSet.Records;
import java.lang.ref.WeakReference;
import java.util.ArrayList;
public class RecordsListFragment extends Fragment implements OnItemClickListener, OnItemLongClickListener {
public static final String ARGUMENT_ITEM_ID = "records_list";
Activity activity;
ListView recordsListView;
ArrayList<Records> records;
RecordsListAdapter recordsListAdapter;
RecordsDAO recordsDAO;
private GetRecordsTask task;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
activity = getActivity();
recordsDAO = new RecordsDAO(activity);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_records_list, container, false);
findViewsById(view);
task = new GetRecordsTask(activity);
task.execute((Void) null);
return view;
}
private void findViewsById(View view) {
recordsListView = (ListView) view.findViewById(R.id.list_records);
}
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Records record = (Records) parent.getItemAtPosition(position);
if (records != null) {
Bundle arguments = new Bundle();
arguments.putParcelable("selectedRecord,", record);
CustomRecordsDialogFragment customRecordsDialogFragment = new CustomRecordsDialogFragment();
customRecordsDialogFragment.setArguments(arguments);
customRecordsDialogFragment.show(getFragmentManager(), CustomRecordsDialogFragment.ARGUMENT_ITEM_ID);
}
}
#Override
public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
Records records = (Records) parent.getItemAtPosition(position);
recordsDAO.deleteRecord(records);
recordsListAdapter.remove(records);
return true;
}
public class GetRecordsTask extends AsyncTask<Void, Void, ArrayList<Records>> {
private final WeakReference<Activity> activityWeakRef;
public GetRecordsTask(Activity context) {
this.activityWeakRef = new WeakReference<Activity>(context);
}
#Override
protected ArrayList<Records> doInBackground(Void... arg0) {
ArrayList<Records> recordsArrayList = recordsDAO.getRecords();
return recordsArrayList;
}
#Override
protected void onPostExecute(ArrayList<Records> empList) {
if (activityWeakRef.get() != null && !activityWeakRef.get().isFinishing()) {
records = empList;
if (empList != null) {
if (empList.size() != 0) {
recordsListAdapter = new RecordsListAdapter(activity, empList);
recordsListView.setAdapter(recordsListAdapter);
} else {
Toast.makeText(activity, "No Records about records... wait wot m8?",
Toast.LENGTH_LONG).show();
}
}
}
}
}
public void updateView() {
task = new GetRecordsTask(activity);
task.execute((Void) null);
}
public void onResume() {
getActivity().setTitle(R.string.app_name);
getActivity().getActionBar().setTitle(R.string.app_name);
super.onResume();
}
}
Here is activity_main.xml with FrameLayout:
<RelativeLayout
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"
tools:context=".MainActivity">
<FrameLayout
android:id="#+id/content_frame"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</RelativeLayout>
Layout resource file which contains a ListView is called fragment_records_list.xml and here it is:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#f9f9f9">
<ListView
android:id="#+id/list_records"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:dividerHeight="10dp"
android:drawSelectorOnTop="true"
android:footerDividersEnabled="false"
android:padding="10dp"
android:scrollbarStyle="outsideOverlay"/>
</RelativeLayout>
Lastly, there is a resource file containing the layout of a single item, list_item.xml:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#ededed"
android:descendantFocusability="blocksDescendants">
<RelativeLayout
android:id="#+id/layout_item"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="#+id/text_record_id"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="5dp"
android:text="ID"
android:textSize="20dp"/>
<TextView
android:id="#+id/text_record_date"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="#id/text_record_id"
android:padding="5dp"
android:text="Date"
android:textColor="#00942b"
android:textSize="20dp"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="#id/text_record_date"
android:drawableStart="#drawable/ic_date_range_black_24dp"
android:padding="5dp"
/>
<TextView
android:id="#+id/text_record_description"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#id/text_record_id"
android:padding="5dp"
android:text="Description"
/>
<TextView
android:id="#+id/text_record_start"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#id/text_record_description"
android:padding="5dp"
android:text="17:00"
android:textSize="16dp"
android:textColor="#004561"
/>
<TextView
android:id="#+id/text_record_dash"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#id/text_record_description"
android:layout_toRightOf="#id/text_record_start"
android:padding="5dp"
android:text="-"
android:textSize="16dp"
/>
<TextView
android:id="#+id/text_record_finish"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#id/text_record_description"
android:layout_toRightOf="#id/text_record_dash"
android:padding="5dp"
android:text="20:00"
android:textSize="16dp"
android:textColor="#c7002a"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="5dp"
android:layout_below="#id/text_record_description"
android:layout_toRightOf="#id/text_record_finish"
android:drawableStart="#drawable/ic_timer_black_24dp"
/>
</RelativeLayout>
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_below="#id/layout_item"
android:background="#000000"
/>
</RelativeLayout>
I haven't found a definite answer to my question, so I'm asking for a bit of help here.

You need set OnItemClickListener and OnLongItemClickListener to ListView, I edited your method in the initializing variable ListView:
private void findViewsById(View view) {
recordsListView = (ListView) view.findViewById(R.id.list_records);
recordsListView.setOnItemClickListener(this);
recordsListView.setOnItemLongClickListener(this);
}

Why isn't my listview updating?

I've got a problem with my listview. When I press a button it should add an item to a listview, but it doesn't. I've used a Toast to be sure that the onClick event for the button is good. Can anyone help me ?
This is the fragment's java code.
package com.wordpress.softwarebycs.i_cseditor;
import android.app.ActionBar;
import android.app.Activity;
import android.content.Context;
import android.graphics.Color;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.text.Layout;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.webkit.WebView;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.Spinner;
import android.widget.TabHost;
import android.widget.TabWidget;
import android.widget.TextView;
import android.widget.Toast;
import java.io.BufferedReader;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
/**
* Created by Cosmin on 11.04.2015.
*/
public class code_Fragment extends Fragment implements AdapterView.OnItemSelectedListener{
View rootview;
WebView previewBrowser;
EditText codebox,fname;
Button save_btn;
Spinner spinner;
ArrayList<String> list = new ArrayList<String>();
ArrayAdapter<String> list_adapter;
ListView projects;
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstance)
{
rootview = inflater.inflate(R.layout.code_layout,container, false);
previewBrowser = (WebView)rootview.findViewById(R.id.previewBrowser);
codebox= (EditText)rootview.findViewById(R.id.codebox);
projects=(ListView)rootview.findViewById(R.id.projectsListView);
list_adapter=new ArrayAdapter<String>(rootview.getContext(), android.R.layout.simple_list_item_1, list);
projects.setAdapter(list_adapter);
list.clear();
save_btn=(Button)rootview.findViewById(R.id.save_btn);
save_btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
writeFile();
}
});
fname=(EditText)rootview.findViewById(R.id.fname);
spinner= (Spinner)rootview.findViewById(R.id.spinner);
ArrayAdapter adapter = ArrayAdapter.createFromResource(rootview.getContext(),R.array.spinner_items,android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(adapter);
final TabHost tabHost=(TabHost)rootview.findViewById(R.id.tabHost);
tabHost.setup();
tabHost.setOnTabChangedListener(new TabHost.OnTabChangeListener() {
#Override
public void onTabChanged(String tabId) {
String file="i_C_s_editor_temp_file_ne_trebuie_un_nume_lung_tare_de_tot.html";
try {
FileOutputStream fos = getActivity().openFileOutput(file, Context.MODE_PRIVATE);
fos.write(codebox.getText().toString().getBytes());
fos.close();
} catch (Exception e) {
e.printStackTrace();
}
previewBrowser.loadUrl("file:///data/data/com.wordpress.softwarebycs.i_cseditor/files/"+file);
}
});
TabHost.TabSpec spec1=tabHost.newTabSpec("Code");
spec1.setContent(R.id.codeTab);
spec1.setIndicator("Code");
TabHost.TabSpec spec2=tabHost.newTabSpec("Preview");
spec2.setContent(R.id.previewTab);
spec2.setIndicator("Preview");
TabHost.TabSpec spec3=tabHost.newTabSpec("File");
spec3.setContent(R.id.fileTab);
spec3.setIndicator("File");
tabHost.addTab(spec1);
tabHost.addTab(spec2);
tabHost.addTab(spec3);
for(int i=0;i<tabHost.getTabWidget().getChildCount();i++)
{
TextView tv = (TextView) tabHost.getTabWidget().getChildAt(i).findViewById(android.R.id.title);
tv.setTextColor(Color.parseColor("#ffe0e0e0"));
}
projects.setOnItemClickListener(new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView<?> parentAdapter, View view, int position, long id) {
TextView clickedView = (TextView) view;
readFile(clickedView.getText().toString());
//tabHost.setCurrentTab(0);
}
});
return rootview;
}
public void writeFile()
{
String FILE_NAME=fname.getText().toString()+spinner.getSelectedItem().toString();
try {
FileOutputStream fos = getActivity().openFileOutput(FILE_NAME, Context.MODE_PRIVATE);
fos.write(codebox.getText().toString().getBytes());
list.add(FILE_NAME);
Toast toast = Toast.makeText(rootview.getContext(),
"File saved!",
Toast.LENGTH_SHORT);
toast.show();
fos.close();
} catch (Exception e) {
e.printStackTrace();
}
}
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
}
#Override
public void onNothingSelected(AdapterView<?> parent) {
}
public void actionStopped(){
try {
FileOutputStream fos = getActivity().openFileOutput("cfg2.txt", Context.MODE_PRIVATE);
Integer k;
for(k=0;k<list.size();k++)
{fos.write(list.get(k).toString().getBytes());
fos.write(System.getProperty("line.separator").getBytes());}
fos.close();
} catch (Exception e) {
e.printStackTrace();
}
}
public void actionResummed() {
list.clear();
try {
BufferedReader bReader = new BufferedReader(new InputStreamReader(getActivity().openFileInput("cfg2.txt")));
String line;
while ((line = bReader.readLine()) != null) {
list.add(line);
}
} catch (IOException e) {
e.printStackTrace();
}
}
#Override
public void onResume() {
super.onResume();
actionResummed();
}
#Override
public void onPause() {
super.onPause();
actionStopped();
}
public void readFile(String path)
{
codebox.setText("");
try {
BufferedReader bReader = new BufferedReader(new InputStreamReader(getActivity().openFileInput(path)));
String line;
while ((line = bReader.readLine()) != null) {
codebox.append(line + "\n");
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
And this is the fragment's xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent" android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:paddingBottom="#dimen/activity_vertical_margin" tools:context=".MainActivity"
android:background="#ff666666">
<TabHost
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="#+id/tabHost"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true">
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:background="#ff8a3e6b">
<TabWidget
android:id="#android:id/tabs"
android:layout_width="fill_parent"
android:layout_height="wrap_content"></TabWidget>
<FrameLayout
android:id="#android:id/tabcontent"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<LinearLayout
android:id="#+id/codeTab"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical">
<EditText
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:inputType="textMultiLine"
android:ems="10"
android:id="#+id/codebox"
android:gravity="top|left"
android:background="#ffffffff"
android:scrollbars="vertical|horizontal"/>
</LinearLayout>
<LinearLayout
android:id="#+id/previewTab"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical">
<WebView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="#+id/previewBrowser"
android:scrollbars="vertical|horizontal"
></WebView>
</LinearLayout>
<!--fileTab-->
<LinearLayout
android:id="#+id/fileTab"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#ff666666"
android:orientation="vertical"
>
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="#+id/linearLayout"
android:layout_marginBottom="20dp">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="File&apos;s Name"
android:id="#+id/textView2"
android:layout_gravity="center_horizontal"
android:textColor="#ffe0e0e0"
android:layout_below="#+id/linearLayout"
android:layout_centerHorizontal="true"
android:layout_marginTop="20dp" />
</LinearLayout>
<LinearLayout
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/linearLayout"
android:layout_centerHorizontal="true"
android:id="#+id/linearLayout2">
<EditText
android:layout_width="237dp"
android:layout_height="41dp"
android:id="#+id/fname"
android:layout_marginTop="10dp"
android:background="#ff8a3e6b"
android:textColor="#ffe0e0e0" />
<Spinner
android:layout_width="fill_parent"
android:layout_height="41dp"
android:id="#+id/spinner"
android:background="#ff8a3e6b"
android:layout_marginTop="9dp"
/>
</LinearLayout>
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/linearLayout2"
android:layout_centerHorizontal="true"
android:id="#+id/linearLayout3">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Save File"
android:id="#+id/save_btn"
android:layout_gravity="center"
android:layout_marginTop="10dp"
android:background="#ff8a3e6b"
android:textColor="#ffe0e0e0"
/>
</LinearLayout>
<!-- separator-->
<TextView
android:layout_width="fill_parent"
android:layout_height="1dp"
android:id="#+id/separator"
android:background="#ff8a3e6b"
android:layout_marginTop="5dp" />
<!--open file -->
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/separator"
android:layout_centerHorizontal="true"
android:id="#+id/linearLayout4">
<TextView
android:paddingTop="20dp"
android:paddingBottom="20dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/text2"
android:textSize="25dp"
android:text="Select file to open!"
android:layout_gravity="top|center"
/>
<ListView
android:layout_width="fill_parent"
android:layout_below="#+id/text2"
android:layout_height="fill_parent"
android:id="#+id/projectsListView"
android:scrollbars="vertical|horizontal"
android:background="#ff8a3e6b">
</ListView>
</LinearLayout>
</LinearLayout>
</FrameLayout>
</LinearLayout>
</TabHost>
</RelativeLayout>

To update listview you have to notify it, I don't see notifying method in your click method
Add below code in
save_btn.setOnClickListener //Method after calling to writeFile() Method
list_adapter.notifyDataSetChanged();

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