EDITED:
PROBLEM: Im trying to show the details of an artist from my list to a fragment but i have an CustomAdapter im using so i dont know how to achieve this when my apps logic is like this:
ListViewAdapter.java --> MainFragment.java --> SongFragment.java (i have to go from adapter to one fragtment to another fragtment and this is causing me trouble) Im trying to set the name of the artist, song name and image of the artist when i go to SongFragment.Java but my setOnItemClickListener is inside MainFragment.java.
Here is a demonstration on what to happen
Steps:
setOnItemClickListener) This is my customListView
SongFragment and show info about singer (artist, song name, image of the artist) This is my 
SongFragment after i clicked on a songMy ListViewAdapter code:
public class ListViewAdapter extends BaseAdapter {
//Create variables
MediaPlayer mediaPlayer;
int layout;
Song currentSong;
ArrayList<Song> arrayList;
Context context;
public ListViewAdapter(int layout, ArrayList<Song> arrayList, Context
context) {
this.layout = layout;
this.arrayList = arrayList;
this.context = context;
}
private class Viewholder {
TextView artistTxt, songNameTxt;
ImageView playB, stopB;
CircleImageView artistImg;
}
@Override
public int getCount() {
return arrayList.size();
}
@Override
public Object getItem(int position) {
return null;
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(int position, View view, ViewGroup parent) {
final Viewholder viewholder;
if (view == null) {
viewholder = new Viewholder();
LayoutInflater layoutInflater = (LayoutInflater)
context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = layoutInflater.inflate(layout, null);
viewholder.artistTxt = (TextView) view.findViewById(R.id.artistTxt);
viewholder.songNameTxt = (TextView)
view.findViewById(R.id.songNameTxt);
viewholder.playB = (ImageView) view.findViewById(R.id.playB);
viewholder.stopB = (ImageView) view.findViewById(R.id.stopB);
viewholder.artistImg = (CircleImageView)
view.findViewById(R.id.artistImg);
view.setTag(viewholder);
} else {
viewholder = (Viewholder) view.getTag();
}
final Song song = arrayList.get(position);
viewholder.artistImg.setImageResource(song.getArtistImg());
viewholder.artistTxt.setText(song.getArtist());
viewholder.songNameTxt.setText(song.getSongName());
//get all songs
mediaPlayer = MediaPlayer.create(context, song.getSong());
viewholder.playB.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (currentSong == null) {
mediaPlayer = MediaPlayer.create(context, song.getSong());
}
//if mediaplayer is not null and my current song is not equal to
//the new song i clicked on
if (mediaPlayer != null && currentSong != song) {
//resets the mediaplayer and creates a new song from the
//position in the list
mediaPlayer.reset();
mediaPlayer = MediaPlayer.create(context, song.getSong());
viewholder.playB.setImageResource(R.drawable.play_black);
mediaPlayer.start();
viewholder.playB.setImageResource(R.drawable.pause_black);
} else {
mediaPlayer.pause();
viewholder.playB.setImageResource(R.drawable.play_black);
}
//check if current song is null or the newly clicked song is
//equal to my current song
//if true then assign the newly clicked song as my CURRENT one
//--so it doesnt play the same song for every single one
if (currentSong == null || song != currentSong) {
currentSong = song;
}
}
});
//stop song
viewholder.stopB.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//stops my current song and make it null
if (currentSong != null) {
mediaPlayer.stop();
mediaPlayer.release();
currentSong = null;
viewholder.playB.setImageResource(R.drawable.play_black);
}
}
});
return view;
}
My MainFragment.java where i add my songs to the list and call my adapter:
public class MainFragment extends Fragment {
//Declare variables
ArrayList<Song> arrayList;
ListView songListView;
ListViewAdapter adapter;
SongFragment songFragment;
FragmentManager fragmentManager;
FragmentTransaction fragmentTransaction;
@Nullable
@Override
public View onCreateView(@NonNull final LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_main, container, false);
//Find my listview
songListView = (ListView) view.findViewById(R.id.songListView);
//create a new arraylist object
arrayList = new ArrayList<>();
//Add songs to my list
arrayList.add(new Song("Beyonce", "-Formation", R.raw.beyonce_formation, R.drawable.beyonce));
arrayList.add(new Song("Chris Brown", "-Hope You Do", R.raw.chrisbrown_hopeyoudo, R.drawable.chrisbrown));
arrayList.add(new Song("Akon ft. Colby'O'Donis", "-Beautiful", R.raw.akon_beautiful_ft_colbyodonis_kardinaloffishall, R.drawable.akon));
arrayList.add(new Song("Akon", "-Beautiful", R.raw.akon_dontmatter, R.drawable.akon));
arrayList.add(new Song("Akon", "-Locked Up", R.raw.akon_lockedup_ft_stylesp, R.drawable.akon));
arrayList.add(new Song("Ava Max", "-Sweet but Psycho", R.raw.avamax_sweetbutpsycho, R.drawable.avamax));
arrayList.add(new Song("Tupac and Biggie ft. Akon Remix", "-Ghetto", R.raw.tupacbiggieakon_ghetto, R.drawable.biggie));
//Create a new adapter of my custom adapter and assign its values
adapter = new ListViewAdapter(R.layout.listview_customlayout, arrayList, getActivity());
//Set my listview to my custom adapter
songListView.setAdapter(adapter);
//Click on a specific song from my list
songListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
//Initiliaze my songFragment to my fragment class
songFragment = new SongFragment();
//call FragmentManager and begin the transaction to my songFragment class
fragmentManager = getFragmentManager();
fragmentTransaction = fragmentManager.beginTransaction();
//When clicked on a listview item - navigate to songfragment and when clicked back -> go back to mainfragment
//save my mainfragment to my stack so it isnt destroyed but kept safe so i can get back to it
fragmentTransaction.replace(R.id.fragment_container, songFragment).addToBackStack(null).commit();
}
});
//return my view
return view;
}
}
My customListView.xml:
<?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"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/white">
<de.hdodenhof.circleimageview.CircleImageView
android:id="@+id/artistImg"
android:layout_width="50sp"
android:layout_height="50sp"
android:src="@drawable/musiclogo"
app:civ_border_color="@color/white"
app:civ_border_width="2dp" />
<TextView
android:id="@+id/artistTxt"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="@id/artistImg"
android:text="Artist"
android:textColor="@color/black"
android:textSize="15sp"
android:textStyle="bold" />
<TextView
android:id="@+id/songNameTxt"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/artistTxt"
android:layout_toRightOf="@id/artistImg"
android:text="Song Name"
android:textColor="#11ca6b" />
<ImageView
android:id="@+id/playB"
android:layout_width="30sp"
android:layout_height="30sp"
android:layout_marginTop="4sp"
android:layout_toLeftOf="@id/stopB"
android:src="@drawable/play_black" />
<ImageView
android:id="@+id/stopB"
android:layout_width="30sp"
android:layout_height="30sp"
android:layout_alignParentRight="true"
android:layout_marginTop="4sp"
android:src="@drawable/stop_black" />
</RelativeLayout>
My fragment_song.xml layout:
<?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"
android:id="@+id/constrainLayout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="@id/artistImg"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:alpha="0.4"
android:background="@color/black"
android:scaleType="centerCrop"
android:src="@drawable/edsher" />
<de.hdodenhof.circleimageview.CircleImageView
android:id="@id/artistImg"
android:layout_width="250sp"
android:layout_height="250sp"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="75sp"
android:src="@drawable/edsher"
app:civ_border_color="@color/white"
app:civ_border_width="2sp" />
<TextView
android:id="@id/songNameTxt"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/artistImg"
android:layout_centerInParent="true"
android:layout_marginTop="10sp"
android:text="Song name" />
<TextView
android:id="@+id/currentSongLenght"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/songNameTxt"
android:layout_marginTop="9sp"
android:layout_toLeftOf="@id/songLenght"
android:text="03:00" />
<TextView
android:id="@+id/currentSongLeft"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/songNameTxt"
android:layout_marginTop="9sp"
android:layout_toRightOf="@id/songLenght"
android:text="-02:20" />
<SeekBar
android:id="@+id/songLenght"
android:layout_width="300sp"
android:layout_height="wrap_content"
android:layout_below="@id/songNameTxt"
android:layout_centerInParent="true"
android:layout_marginTop="10sp" />
<ImageView
android:id="@+id/previousB"
android:layout_width="60dp"
android:layout_height="60dp"
android:layout_below="@id/songLenght"
android:layout_toLeftOf="@id/playB"
android:src="@drawable/previous" />
<ImageView
android:id="@id/playB"
android:layout_width="70sp"
android:layout_height="70sp"
android:layout_below="@id/songLenght"
android:layout_centerInParent="true"
android:src="@drawable/play_big" />
<ImageView
android:id="@+id/nextB"
android:layout_width="60sp"
android:layout_height="60sp"
android:layout_below="@id/songLenght"
android:layout_toRightOf="@id/playB"
android:src="@drawable/next" />
<ImageView
android:id="@+id/favoriteB"
android:layout_width="40sp"
android:layout_height="40sp"
android:layout_below="@id/songLenght"
android:layout_alignParentEnd="true"
android:layout_marginTop="10sp"
android:src="@drawable/favorite" />
</RelativeLayout>
You would make your Song Serializable: class Song implements Serializable{
And then pass the class in your bundle.
Bundle bundle = new Bundle();
bundle.putSerializable("song", song);
songFragment.setArguments(bundle);
In your SongFragment you should get the arguments:
public class SongFragment extends Fragment {
@Nullable
@Override
public View onCreateView( /* .... */){
Song song = getArguments().getSerializable("song");
}
}
If you don't want to use arguments (I would use arguments definitively) I would create a method in my SongFragment which will receive all the data I need and I would call it in my the mainFragment using the SongFragment instance.
Something like this:
public class SongFragment extends Fragment {
String artist;
String song;
int name;
int image;
TextView nameText, artistText;
/* all my code .... */
@Nullable
@Override
public View onCreateView(@NonNull final LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_main, container, false);
nameText = view.findByViewId(R.id.my_name_id);
artistText = view.findByViewId(R.id.my_artist_id);
}
public getSongData(String artist, String song, int name, int image){
this.artist = artist;
this.song = song;
this.name = name;
this.image = image;
nameText.setText(name);
artistText.setText(artist);
}
}
in MainFragment in your songListView.setOnItemClickListener:
songListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
songFragment = new SongFragment();
// -----> HERE <-----
songFragment.getSongData(song.getArtist(), song.getSongName(), song.getName(), song.getArtistImg());
// -----> HERE <-----
fragmentManager = getFragmentManager();
fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.replace(R.id.fragment_container, songFragment).addToBackStack(null).commit();
}
});