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How to download a image from url in recylerview?

I have made a meme app, which fetches image url from an API and i m parsing them and showing in recyler view using Glide , in my item layout i have two buttons one for sharing and one for download Image , i want when user clicks the download button the images get download to the user phone.
Help me how i can implement this.
MyAdapter class
public class Adapter extends RecyclerView.Adapter<Adapter.ViewHolder> {
Context context;
ArrayList<Model> modelArrayList;
public Adapter(Context context, ArrayList<Model> modelArrayList) {
this.context = context;
this.modelArrayList = modelArrayList;
}
#NonNull
#Override
public ViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(context).inflate(R.layout.item_layout, parent,false);
return new ViewHolder(view);
}
#Override
public void onBindViewHolder(#NonNull ViewHolder holder, int position) {
String url = modelArrayList.get(position).getUrl();
holder.setImage(url);
holder.button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent sharing = new Intent (Intent.ACTION_SEND);
sharing.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
sharing.setType("text/plain");
String subject = "Hey Man just look at this coll meme click the link " +url;
sharing.putExtra(Intent.EXTRA_TEXT,subject);
context.startActivity(Intent.createChooser(sharing,"Shring using"));
}
});
holder.buttonDownload.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
}
});
}
#Override
public int getItemCount() {
return modelArrayList.size();
}
public class ViewHolder extends RecyclerView.ViewHolder{
ImageView imageView;
Button button,buttonDownload;
public ViewHolder(#NonNull View itemView) {
super(itemView);
imageView = itemView.findViewById(R.id.imageView);
button = itemView.findViewById(R.id.button);
buttonDownload = itemView.findViewById(R.id.btn_download);
}
void setImage(String link){
Glide.with(context).load(link).into(imageView);
}
}
}
My model class
public class Model {
String url;
public Model(String url) {
this.url = url;
}
public String getUrl() {
return url;
}
public void setUrl(String url) {
this.url = url;
}
}
My item_layout
<?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:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="#+id/imageView"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_margin="8dp"
app:layout_constraintBottom_toTopOf="#+id/button"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="#drawable/ic_launcher_background"
tools:ignore="VectorDrawableCompat" />
<Button
android:id="#+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="104dp"
android:layout_marginLeft="104dp"
android:layout_marginBottom="28dp"
android:text="Share"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent" />
<Button
android:id="#+id/btn_download"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="71dp"
android:layout_marginRight="71dp"
android:layout_marginBottom="28dp"
android:text="Download"
android:textColor="#0B0B0B"
app:backgroundTint="#12E71A"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
My mainactivity.java
public class MainActivity extends AppCompatActivity {
RecyclerView recyclerView;
Adapter adapter;
ArrayList<Model> arrayList;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
recyclerView = findViewById(R.id.recylerview_id);
arrayList = new ArrayList<>();
String url = "https://meme-api.herokuapp.com/gimme/30";
JsonObjectRequest jsonObjectRequest = new JsonObjectRequest
(Request.Method.GET, url, null, new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
try {
JSONArray jsonArray = response.getJSONArray("memes");
for (int i = 0; i < jsonArray.length(); i++){
JSONObject jsonObject = jsonArray.getJSONObject(i);
String url = jsonObject.getString("url");
Model m = new Model(url);
arrayList.add(m);
}
adapter = new Adapter(MainActivity.this,arrayList);
recyclerView.setLayoutManager(new LinearLayoutManager(getApplicationContext()));
recyclerView.setAdapter(adapter);
adapter.notifyDataSetChanged();
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
// TODO: Handle error
}
});
// Access the RequestQueue through your singleton class.
MySingleton.getInstance(this).addToRequestQueue(jsonObjectRequest);
}
}

Glide allows to load a Bitmap.
you can save Bitmap to file, and then just pass file path to another screen.
Here you can find detailed tutorial, how to store image to file with Glide library:
https://medium.com/#akshayranagujjar/how-to-save-image-to-storage-using-glide-in-android-fa26c842f212
And don't forget about storage permissions.

NULL Pointer Exception Error Application Crashed After Clicking on Recycler List Item

I am working on an android application that is showing data in Recycle List View Holder. When I Click on List Item in Recycler View Holder the application crashes.
public class UserRecyclerAdapterSavedUsers extends RecyclerView.Adapter<UserRecyclerAdapterSavedUsers.UserViewHolder> {
private List<User> listUsers;
Context mContext;
ItemClickListenerLongPressed itemClickListenerLongPressed;
public UserRecyclerAdapterSavedUsers(List<User> listUsers) {
this.listUsers = listUsers;
}
#Override
public UserViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.item_user_recycler_second, parent, false);
return new UserViewHolder(itemView);
}
#Override
public void onBindViewHolder(UserViewHolder holder, int position) {
holder.textViewID.setText(listUsers.get(position).getUserid());
holder.textViewName.setText(listUsers.get(position).getName());
holder.textViewPassword.setText(listUsers.get(position).getPassword());
holder.textViewRole.setText(listUsers.get(position).getRole());
}
public void setItemClickListenerLongPressed(ItemClickListenerLongPressed itemClickListenerLongPressed){
this.itemClickListenerLongPressed=itemClickListenerLongPressed;
}
#Override
public int getItemCount() {
Log.v(UserRecyclerAdapterSavedUsers.class.getSimpleName(),""+listUsers.size());
return listUsers.size();
}
/**
* ViewHolder class
*/
public class UserViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
//public AppCompatTextView ID;
public AppCompatTextView textViewID;
public AppCompatTextView textViewName;
public AppCompatTextView textViewPassword;
public AppCompatTextView textViewRole;
public UserViewHolder(View view) {
super(view);
textViewID = (AppCompatTextView) view.findViewById(R.id.textViewID);
textViewName = (AppCompatTextView) view.findViewById(R.id.textViewName);
textViewPassword = (AppCompatTextView) view.findViewById(R.id.textViewPassword);
textViewRole = (AppCompatTextView) view.findViewById(R.id.textViewRole);
}
#Override
public void onClick(View v) {
if (itemClickListenerLongPressed != null) itemClickListenerLongPressed.onClick(v, getAdapterPosition());
Toast.makeText(mContext, "USMAN", Toast.LENGTH_SHORT).show();
}
}
}
Here is the users List activity
public class UsersListActivity extends AppCompatActivity implements ItemClickListenerLongPressed{
AppCompatActivity activity = UsersListActivity.this;
AppCompatTextView textViewName;
RecyclerView mRecyclerView;
AppCompatButton textViewButtonNewUser;
UserRecyclerAdapterSavedUsers userRecyclerAdapterSavedUsers;
List<User> listUsers;
DatabaseHelper databaseHelper;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_user_record_updated_list);
mRecyclerView= (RecyclerView) findViewById(R.id.recyclerViewUsers);
mRecyclerView.setAdapter(userRecyclerAdapterSavedUsers);
userRecyclerAdapterSavedUsers.setItemClickListenerLongPressed(this);
initViews();
initObjects();
}
#Override
public void onBackPressed() {
super.onBackPressed();
startActivity(new Intent(UsersListActivity.this,AdminMain.class));
finish();
}
#Override
protected void onRestart() {
super.onRestart();
}
/**
* This method is to initialize views
*/
private void initViews() {
textViewName = (AppCompatTextView) findViewById(R.id.textViewName);
textViewButtonNewUser = (AppCompatButton) findViewById(R.id.btnaddnew);
mRecyclerView = (RecyclerView) findViewById(R.id.recyclerViewUsers);
textViewButtonNewUser.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
startActivity(new Intent(UsersListActivity.this,UserRecordSaveActivity.class));
}
});
}
/**
* This method is to initialize objects to be used
*/
private void initObjects() {
listUsers = new ArrayList<>();
userRecyclerAdapterSavedUsers = new UserRecyclerAdapterSavedUsers(listUsers);
RecyclerView.LayoutManager mLayoutManager = new LinearLayoutManager(getApplicationContext());
mRecyclerView.setLayoutManager(mLayoutManager);
mRecyclerView.setItemAnimator(new DefaultItemAnimator());
mRecyclerView.setHasFixedSize(true);
mRecyclerView.setAdapter(userRecyclerAdapterSavedUsers);
databaseHelper = new DatabaseHelper(activity);
String emailFromIntent = getIntent().getStringExtra("USERS");
textViewName.setText(emailFromIntent);
getDataFromSQLite();
}
/**
* This method is to fetch all user records from SQLite
*/
private void getDataFromSQLite() {
// AsyncTask is used that SQLite operation not blocks the UI Thread.
new AsyncTask<Void, Void, Void>() {
#Override
protected Void doInBackground(Void... params) {
listUsers.clear();
listUsers.addAll(databaseHelper.getAllUser());
return null;
}
#Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
userRecyclerAdapterSavedUsers.notifyDataSetChanged();
}
}.execute();
}
#Override
public void onClick(View view, int position) {
}
}
When I clicked on the List Item it crashed and the error was caused by Toast. As I remove the toast the Error goes because of using a try catch item not clicked.
Here is the image of Error.
After Removing try catch It again shows error but this time the error is shown on AlertDialog. Builder. Here is the image of error without try catch.
Image after removing try and catch
ERROR BEFORE REMOVING TOAST OVER ON CLICK
Image after adding toast logcat Error
Image After Adding Toast
The error is now on users list activity
Image after eidting of code
The actual data in list when removing the click listener
Actual data in list by removing the click listener
Here is my recycler layout file
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
card_view:cardCornerRadius="4dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/Indigo"
android:orientation="vertical"
android:padding="16dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<android.support.v7.widget.AppCompatTextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="2"
android:text="User ID"
android:textColor="#color/colorTextHint" />
<android.support.v7.widget.AppCompatTextView
android:id="#+id/textViewID"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="User ID"
android:textColor="#android:color/darker_gray" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="5dp"
android:orientation="horizontal">
<android.support.v7.widget.AppCompatTextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="2"
android:text="Name"
android:textColor="#color/colorTextHint" />
<android.support.v7.widget.AppCompatTextView
android:id="#+id/textViewName"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Name"
android:textColor="#android:color/darker_gray" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="5dp"
android:orientation="horizontal">
<android.support.v7.widget.AppCompatTextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="2"
android:text="#string/hint_password"
android:textColor="#color/colorTextHint" />
<android.support.v7.widget.AppCompatTextView
android:id="#+id/textViewPassword"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="#string/hint_password"
android:textColor="#android:color/darker_gray" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="5dp"
android:orientation="horizontal">
<android.support.v7.widget.AppCompatTextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="2"
android:text="Role"
android:textColor="#color/colorTextHint" />
<android.support.v7.widget.AppCompatTextView
android:id="#+id/textViewRole"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Role"
android:textColor="#android:color/darker_gray" />
</LinearLayout>
</LinearLayout>
Here is the Image of Logcat
Logcat Image at Updating Data
Here is the IMEIRecord Save activity Adapter like user record..
public class IMEIRecyclerAdapter extends RecyclerView.Adapter<IMEIRecyclerAdapter.ImeiViewHolder> {
private List<User> ListImei;
Context mContext;
ItemClickListenerLongPressed itemClickListenerLongPressed;
View itemView;
public IMEIRecyclerAdapter(List<User> ListImei) {
this.ListImei = ListImei;
}
#Override
public ImeiViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.item_user_recycler_imei, parent, false);
return new ImeiViewHolder(itemView);
}
#Override
public void onBindViewHolder(ImeiViewHolder holder, int position) {
final User user= ListImei.get(position);
holder.textViewImeiId.setText(ListImei.get(position).getImeiid());
holder.textViewImeiNo.setText(ListImei.get(position).getImei());
}
public void setItemClickListenerLongPressed(ItemClickListenerLongPressed itemClickListenerLongPressed) {
this.itemClickListenerLongPressed = itemClickListenerLongPressed;
}
#Override
public int getItemCount() {
Log.v(UsersRecyclerAdapter.class.getSimpleName(),""+ListImei.size());
return ListImei.size();
}
public void displayingAlertDialogimei() {
final User user= new User();
//displaying alert dialog box
AlertDialog.Builder builder = new AlertDialog.Builder(itemView.getContext());
builder.setTitle("Choose Option");
builder.setMessage("Update or Delete?");
builder.setPositiveButton("Update", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
//go to update activity
goToUpdateActivity(user.getUserid());
dialog.cancel();
}
});
builder.setNeutralButton("Delete", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
//go to update activity
dialog.cancel();
}
});
builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
AlertDialog alert11 = builder.create();
alert11.show();
}
private void goToUpdateActivity(String userid) {
Intent goToUpdate = new Intent(mContext, RoughUser.class);
goToUpdate.putExtra("USER_ID", userid);
mContext.startActivity(goToUpdate);
}
public class ImeiViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{
public AppCompatTextView textViewImeiId;
public AppCompatTextView textViewImeiNo;
LinearLayout layout;
public ImeiViewHolder(View view) {
super(view);
textViewImeiId = (AppCompatTextView) view.findViewById(R.id.textViewImeiId);
textViewImeiNo = (AppCompatTextView) view.findViewById(R.id.textViewImeiNo);
layout = (LinearLayout) view.findViewById(R.id.list_view_imei);
layout.setOnClickListener(this);
}
#Override
public void onClick(View v) {
displayingAlertDialogimei();
}
}
}

first add id to your parent LinearLayout as, android:id="#+id/list_view"
and then update adapter class
public class UserRecyclerAdapterSavedUsers extends RecyclerView.Adapter<UserRecyclerAdapterSavedUsers.UserViewHolder> {
private List<User> listUsers;
Context mContext;
ItemClickListenerLongPressed itemClickListenerLongPressed;
View itemView;
public UserRecyclerAdapterSavedUsers(List<User> listUsers) {
this.listUsers = listUsers;
}
#Override
public UserViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.item_user_recycler_second, parent, false);
return new UserViewHolder(itemView);
}
#Override
public void onBindViewHolder(UserViewHolder holder, int position) {
holder.textViewID.setText(listUsers.get(position).getUserid());
holder.textViewName.setText(listUsers.get(position).getName());
holder.textViewPassword.setText(listUsers.get(position).getPassword());
holder.textViewRole.setText(listUsers.get(position).getRole());
}
public void setItemClickListenerLongPressed(ItemClickListenerLongPressed itemClickListenerLongPressed){
this.itemClickListenerLongPressed=itemClickListenerLongPressed;
}
#Override
public int getItemCount() {
return listUsers.size();
}
private void displayingAlertDialog() {
//displaying alert dialog box
AlertDialog.Builder builder = new AlertDialog.Builder(itemView.getContext());
builder.setMessage("your toast message here...");
builder.setCancelable(true);
builder.setPositiveButton(
"Ok",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
});
AlertDialog alert11 = builder.create();
alert11.show();
}
/**
* ViewHolder class
*/
public class UserViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
//public AppCompatTextView ID;
public AppCompatTextView textViewID;
public AppCompatTextView textViewName;
public AppCompatTextView textViewPassword;
public AppCompatTextView textViewRole;
LinearLayout layout;
public UserViewHolder(View view) {
super(view);
textViewID = (AppCompatTextView) view.findViewById(R.id.textViewID);
textViewName = (AppCompatTextView) view.findViewById(R.id.textViewName);
textViewPassword = (AppCompatTextView) view.findViewById(R.id.textViewPassword);
textViewRole = (AppCompatTextView) view.findViewById(R.id.textViewRole);
layout = view.findViewById(R.id.list_view);
layout.setOnClickListener(this);
}
#Override
public void onClick(View v) {
displayingAlertDialog();
}
}

You have not declare mContext in your adapter class.
In Adapter class constructor may change like this.
public UserRecyclerAdapterSavedUsers(List<User> listUsers,Context context) {
this.mContext= context;
this.listUsers1 = listUsers;
user= new User();
}
and Recycle view Activity class you have to change
UserRecyclerAdapterSavedUsers myAdapter = new RecyclerViewAdapter(yourList,this);

Use the Recyclerview Item click like this click here
and then you can access the interface in your activity or fragment and then you can add whatever you need.
giving toast and populating AlertDialog inside the Adapteris not the proper way of coding

Firestore recycler adapter not fetching document names

I'm trying fetch all documents using FirestoreRecyclerAdapter here if there are 7 documents the RecyclerView items successfully populates with 7 items but here problem is the items which are having a text view are not getting populated with document names. Please take a look at my source code:
FriendsResponse Class:
#IgnoreExtraProperties
public class FriendsResponse {
FirebaseFirestore db;
public String getTable1() {
return Table1;
}
public void setTable1(String table1) {
Table1 = table1;
}
private String Table1;
public FriendsResponse() {
}
public FriendsResponse(String Table1) {
this.Table1 = Table1;
}
}
TableList Fragment where recyclerview is initialized:
public class TableListFragment extends Fragment{
private FirebaseFirestore db;
private FirestoreRecyclerAdapter adapter;
String documentnm;
RecyclerView recyclerView;
FloatingActionButton addt;
private StaggeredGridLayoutManager _sGridLayoutManager;
public static TableListFragment newInstance() {
TableListFragment fragment = new TableListFragment();
return fragment;
}
public TableListFragment() {
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_tablelist, container, false);
recyclerView = view.findViewById(R.id.rectab);
addt=view.findViewById(R.id.addtab);
init();
getFriendList();
addt.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
}
});
return view;
}
private void init(){
_sGridLayoutManager = new StaggeredGridLayoutManager(3,
StaggeredGridLayoutManager.VERTICAL);
recyclerView.setLayoutManager(_sGridLayoutManager);
db = FirebaseFirestore.getInstance();
}
private void getFriendList(){
Query query = db.collection("Order");
FirestoreRecyclerOptions<FriendsResponse> response = new FirestoreRecyclerOptions.Builder<FriendsResponse>()
.setQuery(query, FriendsResponse.class)
.build();
adapter = new FirestoreRecyclerAdapter<FriendsResponse, FriendsHolder>(response) {
#Override
public void onBindViewHolder(FriendsHolder holder, int position, FriendsResponse model) {
holder.exname.setText(model.getTable1());
holder.itemView.setOnClickListener(v -> {
Snackbar.make(recyclerView, model.getTable1(), Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
});
}
#Override
public FriendsHolder onCreateViewHolder(ViewGroup group, int i) {
View view = LayoutInflater.from(group.getContext())
.inflate(R.layout.list_item, group, false);
return new FriendsHolder(view);
}
#Override
public void onError(FirebaseFirestoreException e) {
Log.e("error", e.getMessage());
}
};
adapter.notifyDataSetChanged();
recyclerView.setAdapter(adapter);
}
public class FriendsHolder extends RecyclerView.ViewHolder {
TextView exname;
public FriendsHolder(View itemView) {
super(itemView);
exname= itemView.findViewById(R.id.topicname);
}
}
#Override
public void onStart() {
super.onStart();
adapter.startListening();
}
#Override
public void onStop() {
super.onStop();
adapter.stopListening();
}
#Override
public void onAttach(Context context) {
super.onAttach(context);
}
#Override
public void onDetach() {
super.onDetach();
}
}
This is the code of list_item:
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView android:id="#+id/cardvw"
android:layout_width="match_parent"
android:layout_height="wrap_content"
card_view:cardCornerRadius="6dp"
card_view:cardElevation="3dp"
card_view:cardUseCompatPadding="true"
xmlns:android="http://schemas.android.com/apk/res/android" xmlns:card_view="http://schemas.android.com/apk/res-auto">
<LinearLayout android:orientation="vertical" android:padding="5dp" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_margin="5dp">
<de.hdodenhof.circleimageview.CircleImageView
android:id="#+id/topiclogo"
android:layout_width="match_parent"
android:layout_gravity="center"
android:src="#drawable/table"
android:layout_height="wrap_content"
/>
<TextView android:textSize="15sp"
android:textStyle="bold"
android:textAlignment="center"
android:textColor="#ffffa200"
android:id="#+id/topicname"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
</LinearLayout>
</android.support.v7.widget.CardView>

As I understand, you want to set the id of the document to that TextView. So because those names are actually documents ids, you should use the following lines of code inside onBindViewHolder() method:
String id = getSnapshots().getSnapshot(position).getId();
holder.exname.setText(id);
The POJO class that you are using is useful when getting the properties of the documents, not to get the document ids.

Code to play list of mp4 url fetching from the server in android studio

I know these questions are previously asked by so many peoples but for my requirement, I'm not able to get the solution.
I have created the main class there I implemented the method to fetch a list of video name's and placing it in to in recycler view. So when the user clicks on any particular video name getting the URL.So the problem is how can I implement the logic to play that clicked item.
MainActivity :
public class MainActivity extends AppCompatActivity {
//ProgressDialog mDialog;
VideoView videoView;
Button btnPlayPause;
//ImageButton btnPlayPause;
String videoURL;
ProgressDialog pd;
private final String url_video = "url://xyz.com/abc/video";
private static final int RECOVERY_REQUEST = 1;
private RecyclerView recyclerView;
private VideoListAdapter videoListAdapter;
private ArrayList<VideoDetail> videoDetailsArrayList = new ArrayList<>();
private View.OnClickListener videoItemClickListener = new View.OnClickListener() {
#Override
public void onClick(View view) {
videoURL = view.getTag().toString();
//setVideo();
}
};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btnPlayPause= (Button) findViewById(R.id.btn_play_pause);
videoView = (VideoView) findViewById(R.id.videoView1);
setAdapter();
loadRequestList();
}
private void loadRequestList() {
if (isNetworkAvailable()) {
pd = new ProgressDialog(MainActivity.this);
pd.setMessage("Loading data...");
pd.show();
//ProgressUtils.getInstance(this).show("Loding Video List........");
StringRequest stringRequest = new StringRequest(Request.Method.GET, url_video, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
try {
//ProgressUtils.getInstance(MainActivity.this).cancel();
pd.dismiss();
if (TextUtils.isEmpty(response)) {
return;
}
VideoDetailsModel videoDetailsModel = VideoResponseHandler.getVideoListDetails(response);
// System.out.println("printing Data of video"+videoDetailsModel.getDetails());
if (videoDetailsModel == null) {
return;
}
if (videoDetailsModel.getDetails() == null) {
return;
}
//System.out.println("printing list3\n");
videoListAdapter.setVideoList((ArrayList<VideoDetail>) videoDetailsModel.getDetails());
//System.out.println("printing list video\n");
} catch (Throwable e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
pd.dismiss();
//ProgressUtils.getInstance(MainActivity.this).cancel();
Toast.makeText(getApplicationContext(), error.getMessage(), Toast.LENGTH_LONG);
}
});
RequestQueue requestQueue = Volley.newRequestQueue(MainActivity.this);
requestQueue.add(stringRequest);
}else{
builderDialog(MainActivity.this).show();
}
}
private AlertDialog.Builder builderDialog(MainActivity listVideoActivity) {
AlertDialog.Builder builder = new AlertDialog.Builder(listVideoActivity);
builder.setTitle("No Internet Connection");
builder.setMessage("You Need To Have Mobile Data or Wifi to access this. Press OK to Exit");
builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialogInterface, int i) {
startActivity(new Intent(MainActivity.this,MainActivity.class));
//finish();
}
});
return builder;
}
private boolean isNetworkAvailable() {
ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activityNetworkInfo = connectivityManager.getActiveNetworkInfo();
return activityNetworkInfo != null && activityNetworkInfo.isConnected();
}
private void setAdapter() {
recyclerView = (RecyclerView) findViewById(R.id.recyclerVideo);
LinearLayoutManager mLayoutManager = new LinearLayoutManager(this);
videoListAdapter = new VideoListAdapter(videoDetailsArrayList,videoItemClickListener);
recyclerView.setLayoutManager(mLayoutManager);
recyclerView.setAdapter(videoListAdapter);
}
}
Adapter Class look like this :
public class VideoListAdapter extends RecyclerView.Adapter<VideoListAdapter.MyViewHandler> {
private ArrayList<VideoDetail> videoDetailArrayList = new ArrayList<>();
private View.OnClickListener videoItemClickListener;
public VideoListAdapter(ArrayList<VideoDetail> videoDetailArrayList, View.OnClickListener videoItemClickListener) {
this.videoDetailArrayList = videoDetailArrayList;
this.videoItemClickListener = videoItemClickListener;
}
#Override
public MyViewHandler onCreateViewHolder (ViewGroup parent, int viewType){
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.single_video_list, parent, false);
return new MyViewHandler(view);
}
#Override
public void onBindViewHolder (MyViewHandler holder,int position){
if (videoDetailArrayList == null) {
return;
}
VideoDetail videoDetail = videoDetailArrayList.get(position);
if (videoDetail == null) {
return;
}
if (holder instance_of MyViewHandler) {
if (TextUtils.isEmpty(videoDetail.getFileName())) {
return;
}
holder.tvVideo.setText(videoDetail.getFileName());
holder.tvVideo.setTag(videoDetail.getFilePath());
holder.videoImage.setTag(videoDetail.getFilePath());
if (videoItemClickListener != null) {
holder.tvVideo.setOnClickListener(videoItemClickListener);
holder.videoImage.setOnClickListener(videoItemClickListener);
}
}
}
#Override
public int getItemCount() {
return videoDetailArrayList.size();
}
public class MyViewHandler extends RecyclerView.ViewHolder {
private final TextView tvVideo;
private final ImageView videoImage;
public MyViewHandler(View itemView) {
super(itemView);
tvVideo = (TextView) itemView.findViewById(R.id.tvVideo);
videoImage = (ImageView) itemView.findViewById(R.id.videoImage);
}
}
public void setVideoList(ArrayList<VideoDetail> videoDetails) {
if (videoDetails != null) {
this.videoDetailArrayList = videoDetails;
}
notifyDataSetChanged();
}
}
activity_main.xml file:
<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"
android:padding="16dp"
tools:context="com.xyz.videoviewengineersdream.MainActivity">
<VideoView
android:id="#+id/videoView1"
android:layout_width="match_parent"
android:layout_height="200dp"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<Button
android:id="#+id/btn_play_pause"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Play"
android:onClick="videoPlay"
android:clickable="true"
android:layout_below="#+id/videoView1"
android:layout_centerHorizontal="true"
android:background="#color/colorPrimary"
android:padding="10dp"
android:layout_marginTop="10dp"
android:textColor="#FFF"
android:textStyle="bold"
android:textSize="16dp"/>
<View
android:layout_width="match_parent"
android:layout_height="10dp"
android:layout_below="#+id/btn_play_pause"
android:id="#+id/viewView"/>
<android.support.v7.widget.RecyclerView
android:id="#+id/recyclerVideo"
android:layout_below="#+id/viewView"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>

you have already created VideDetail class
private ArrayList<VideoDetail> videoDetailArrayList = new ArrayList<>()
just Add videourl fields to the VideoDetail class then you can directly get url on button click like below in onBindViewHolder
final VideDetail videodetail = videolist.get(position);
holder.yourbtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
String url = videdetail.getvideourl();
// play video with the url you got
}
});

I have multiple recyclerViews ,which should appear after another XML view,

I have multiple recyclerViews ,which should appear after another XML view, but they just don't , am using an adapter class to manage this. after using log.v I found that the the functions itself"in Adappter class" arent called , and i don't know why ??
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/ScrollView01"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<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="com.example.linah.movielessonapp.Detailed_Movie">
<TextView
android:id="#+id/MovieTitle"
... />
<ImageView
android:id="#+id/MovieImage"
.../>
<TextView
android:id="#+id/MovieReview"
... />
<Button
android:id="#+id/Favbutton"
... />
<TextView
android:id="#+id/Date"
... />
<TextView
android:id="#+id/Rate"
.../>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<android.support.v7.widget.RecyclerView
android:id="#+id/Trailers_recycler_view"
android:scrollbars="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#+id/MovieReview" />
<android.support.v7.widget.RecyclerView
android:id="#+id/reviews_recycler_view"
android:scrollbars="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#+id/Trailers_recycler_view"
/>
</LinearLayout>
</RelativeLayout>
</ScrollView>
public class Detailed_Movie extends AppCompatActivity {
public static List<Movie_Details> movieDetailsList = new ArrayList<>();
private String ID;
public String Trailer_OR_Review = "trailer";
private boolean noConnection;
private boolean trailersDone;
private int trailersSize;
private static MoviesDetailedAdapter mAdapter;
private RecyclerView TrailerRecyclerView, ReviewsRecyclerView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_detailed__movie);
TrailerRecyclerView = (RecyclerView) findViewById(R.id.Trailers_recycler_view);
ReviewsRecyclerView = (RecyclerView) findViewById(R.id.reviews_recycler_view);
new getData().execute("trailer");
// adapter
mAdapter = new MoviesDetailedAdapter(movieDetailsList,TrailerRecyclerView.getContext(),Trailer_OR_Review);
// mAdapter = new MoviesDetailedAdapter(movieDetailsList,ReviewsRecyclerView.getContext(),Trailer_OR_Review);
TrailerRecyclerView.setLayoutManager(new LinearLayoutManager(TrailerRecyclerView.getContext()));
// ReviewsRecyclerView.setLayoutManager(new LinearLayoutManager(ReviewsRecyclerView.getContext()));
TrailerRecyclerView.setItemAnimator(new DefaultItemAnimator());
// ReviewsRecyclerView.setItemAnimator(new DefaultItemAnimator());
noConnection = false;
if(isOnline(Detailed_Movie.this)) {
new getData().execute("trailer");
mAdapter.notifyDataSetChanged();
}
// set the adapter
TrailerRecyclerView.setAdapter(mAdapter);
prepareMovieData();
Intent i = getIntent();
// http://api.themoviedb.org/3/movie/{id}/videos
String ImgPath = "http://image.tmdb.org/t/p/w185/";
String VideoPath = "http://www.youtube.com/watch?v=";
String MovieTitle = i.getExtras().getString("title");
Toast.makeText(getApplicationContext(),MovieTitle+" is selected!", Toast.LENGTH_SHORT).show();
ImageView img = (ImageView)findViewById(R.id.MovieImage);
TextView Title = (TextView)findViewById(R.id.MovieTitle);
TextView Review = (TextView)findViewById(R.id.MovieReview);
TextView Date = (TextView)findViewById(R.id.Date);
TextView Rate = (TextView)findViewById(R.id.Rate);
Button Fav = (Button) findViewById(R.id.Favbutton);
// get data from intent
assert Title != null;
Title. setText(i.getExtras().getString("title"));
assert Review != null;
Review.setText(i.getExtras().getString("review"));
assert Rate != null;
Rate. setText(i.getExtras().getString("rate"));
assert Date != null;
Date. setText(i.getExtras().getString("date"));
ID = i.getExtras().getString("id");
String Imgurl = i.getExtras().getString("img");
// append ImgPath
switch (ImgPath = new StringBuilder()
.append(ImgPath)
.append(Imgurl)
.toString()) {
}
// append VideoPath
VideoPath = new StringBuilder()
.append(VideoPath)
.append("6uEMl2BtcqQ")
.toString();
// VideoPath = VideoPath + getString(R.string.API_KEY);
final String finalVideoPath = VideoPath;
if (Fav != null) {
Fav.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(Intent.ACTION_VIEW,
Uri.parse(finalVideoPath));
startActivity(intent);
}
});
}
Picasso.with(this)
.load(ImgPath)
.placeholder(R.drawable.loading) //this is optional the image to display while the url image is downloading
.error(R.drawable.error) //this is also optional if some error has occurred in downloading the image
.into(img);
TrailerRecyclerView.addOnItemTouchListener(new RecyclerTouchListener(getApplicationContext(), TrailerRecyclerView, new ClickListener() {
#Override
public void onClick(View view, int position) {
Movie_Details movie = movieDetailsList.get(position);
if (position < trailersSize) {
// String link = ((TextView) findViewById(R.id.Link)).getText().toString();
// String link = movie.getKey();
startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("http://www.youtube.com/watch?v=" + movie.getKey())));
}
}
#Override
public void onLongClick(View view, int position) {
}
}));
}
private void prepareMovieData() {
Movie_Details movie = new Movie_Details("MovieTrailer","6uEMl2BtcqQ","Linah","verynice");
movieDetailsList.add(movie);
mAdapter.notifyDataSetChanged();
}
public interface ClickListener {
void onClick(View view, int position);
void onLongClick(View view, int position);
}
public static class RecyclerTouchListener implements RecyclerView.OnItemTouchListener {
private GestureDetector gestureDetector;
private MainActivity.ClickListener clickListener;
public RecyclerTouchListener(Context context, final RecyclerView recyclerView, final MainActivity.ClickListener clickListener) {
this.clickListener = clickListener;
gestureDetector = new GestureDetector(context, new GestureDetector.SimpleOnGestureListener() {
#Override
public boolean onSingleTapUp(MotionEvent e) {
return true;
}
#Override
public void onLongPress(MotionEvent e) {
View child = recyclerView.findChildViewUnder(e.getX(), e.getY());
if (child != null && clickListener != null) {
clickListener.onLongClick(child, recyclerView.getChildPosition(child));
}
}
});
}
public RecyclerTouchListener(Context applicationContext, RecyclerView trailerRecyclerView, ClickListener clickListener) {
}
#Override
public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e) {
View child = rv.findChildViewUnder(e.getX(), e.getY());
if (child != null && clickListener != null && gestureDetector.onTouchEvent(e)) {
clickListener.onClick(child, rv.getChildPosition(child));
}
return false;
}
#Override
public void onTouchEvent(RecyclerView rv, MotionEvent e) {
}
#Override
public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {
}
}
public class getData extends AsyncTask<String, Void, Void> {
...
}
}
class MoviesDetailedAdapter
public class MoviesDetailedAdapter extends RecyclerView.Adapter {
private List<Movie_Details> moviesList;
private Context context;
public String Trailer_OR_Review = "trailer";
public TextView TrailerName , Author , Content , TrailerLink ;
public class MyViewHolder extends RecyclerView.ViewHolder implements View.OnCreateContextMenuListener {
public MyViewHolder(View view) {
super(view);
Log.v("here","MyViewHolder");
TrailerName = (TextView) view.findViewById(R.id.Name);
Author = (TextView) view.findViewById(R.id.Author);
TrailerLink = (TextView) view.findViewById(R.id.Link);
Content = (TextView) view.findViewById(R.id.Content);
view.setOnCreateContextMenuListener(this);
}
#Override
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
}
}
public MoviesDetailedAdapter(List<Movie_Details> moviesList,Context context, String trailerORReview) {
this.moviesList = moviesList;
this.context = context;
Trailer_OR_Review = trailerORReview;
Log.v("here","madapter");
}
#Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView;
Log.v("here","onCreateViewHolder");
itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.trailers_layout, parent, false);
/*
if (Trailer_OR_Review.equals("trailers")){
itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.trailers_layout, parent, false);
}
else{
itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.reviews_layout, parent, false);
}*/
return new MyViewHolder(itemView);
}
#Override
public void onBindViewHolder(MyViewHolder holder, int position) {
Log.v("here","onBindViewHolder");
Movie_Details movie_details = moviesList.get(position);
Log.v("here",movie_details.getContent());
Log.v("here",movie_details.getName());
TrailerName.setText(movie_details.getName());
TrailerLink.setText(movie_details.getKey());
/*
if (Trailer_OR_Review.equals("trailers")){
TrailerName.setText(movie_details.getName());
TrailerLink.setText(movie_details.getKey());
}
else{
Author.setText(movie_details.getAuthor());
Content.setText(movie_details.getContent());
}*/
}