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ClassCastException: com.nambimobile.widgets.efab.ExpandableFabLayout cannot be cast to Activity onCreate

So I'm adding an expandable fab, but I'm having this error and I don't understand why...
this is the exact error in log:
ava.lang.ClassCastException: com.nambimobile.widgets.efab.ExpandableFabLayout cannot be cast to com.nambimobile.widgets.efab.ExpandableFab
at CategoryActivity.onCreate(CategoryActivity.java:56)
import androidx.activity.result.ActivityResultLauncher;
import androidx.activity.result.contract.ActivityResultContracts;
import androidx.appcompat.app.AppCompatActivity;
import androidx.lifecycle.ViewModelProvider;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
public class CategoryActivity extends AppCompatActivity implements CategoryAdapter.onCategoryClickListener {
public static final String CATEGORY_NAME = "category_name";
private NoteViewModel noteViewModel;
private CategoryAdapter adapter;
private RecyclerView recyclerView;
private List<FolderWithNotes> folderWithNotes;
private Note note;
private Folder folder;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
noteViewModel = new ViewModelProvider.AndroidViewModelFactory(this.getApplication()).create(NoteViewModel.class);
recyclerView = findViewById(R.id.category_recyclerview);
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
noteViewModel.getFolderWithNotes().observe(this, folderWithNotes -> {
});
ExpandableFab exFab = findViewById(R.id.exFab);
exFab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
switch (view.getId()) {
case (R.id.exfab_add_category):
Intent intent = new Intent(CategoryActivity.this, AddCategoryActivity.class);
startActivity(intent);
case (R.id.exfab_delete_category):
default:
break;
}
}
});
ActivityResultLauncher<Intent> launcher = registerForActivityResult( new ActivityResultContracts.StartActivityForResult(), result -> {
if(result.getResultCode() == Activity.RESULT_OK) {
Intent data = result.getData();
String category = data.getStringExtra(AddCategoryActivity.CATEGORY_REPLY);
String notes = data.getStringExtra(AddNoteActivity.NOTE_REPLY);
Folder folder = new Folder(note.getFolder_name());
noteViewModel.insert(folder, note);
}
});
}
#Override
protected void onResume() {
super.onResume();
adapter = new CategoryAdapter(folderWithNotes, this, this);
recyclerView.setAdapter(adapter);
}
#Override
public void onCategoryClick(int position) {
// code to transfer to AddNoteActivity (where the note list is) by clicking the category folder
noteViewModel.getFolderWithNotes().observe(this, folderWithNotes -> {
Intent intent = new Intent(CategoryActivity.this, NotesActivity.class);
intent.putExtra(CATEGORY_NAME, folderWithNotes.get(position).getFolder().getFolderName());
});
}
public void addCategoryClicked(View view) {
EditText editCategory = findViewById(R.id.et_add_category);
String categoryTitle = editCategory.getText().toString().trim();
Intent intent = new Intent(CategoryActivity.this, AddCategoryActivity.class);
}
public void deleteCategoryClicked(View view) {
}
// #Override
// public void addCategoryClicked(int position) {
//
// }
//
}

Runnable not works

I have problem with Runnable. It don't want to works, and i don't know what is the problem, because it is works in my other app... Can somebody help me?
Just example, there are "healt" with deafult value=5, for the test i made a button, when i click button, healt value -1... and i want start Runnable when health<5... and add +1 to health.... for the test i setted the Runnable 1 secunds
Here is the code:
MainActivity.java
package com.mygame.test;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.TextView;
import static com.mygame.test.variables.coin;
import static com.mygame.test.variables.health;
public class Main2Activity extends AppCompatActivity {
public static final String PREFS_NAME_MAIN = "mainpref";
TextView coinText, healthText, textView;
Button button3;
private final Context app = this;
private final Handler update = new Handler();
private final Runnable updateHealth = new Runnable()
{
public void run()
{
if (variables.run)
{
healthText.setText(""+health);
update.postDelayed(updateHealth, 500);
}
else if (!variables.run) update.removeCallbacksAndMessages(null);
}
};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_main2);
coinText = findViewById(R.id.coinText);
healthText = findViewById(R.id.healthText);
healthText.setText(String.valueOf(health));
button3 = findViewById(R.id.button3);
textView = findViewById(R.id.textView);
Button closeButton = findViewById(R.id.closeButton);
closeButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
//finishAffinity();
startActivity(new Intent(Main2Activity.this, ExitActivity.class));
}
});
Button coinsplusButton = findViewById(R.id.coinsplusButton);
coinsplusButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
//finishAffinity();
startActivity(new Intent(Main2Activity.this, StoreActivity.class));
}
});
Button level1Button = findViewById(R.id.level1Button);
level1Button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
//finishAffinity();
startActivity(new Intent(Main2Activity.this, Level1Activity.class));
}
});
}
public void buttontest(View button3)
{
if (health > 0) {
health = health-1;
healthText.setText(""+health);
}
variables.run = true;
Intent activeClick = new Intent(this, ClickService.class);
this.startService(activeClick);
update.post(updateHealth);
save();
}
#Override
protected void onStart()
{
super.onStart();
load();
textupgrade();
if (!variables.run)
{
variables.run = true;
Intent activeClick = new Intent(this, ClickService.class);
this.startService(activeClick);
}
}
protected void onResume()
{
super.onResume();
load();
textupgrade();
update.post(updateHealth);
}
private void load()
{
SharedPreferences varReader = app.getSharedPreferences(PREFS_NAME_MAIN, MODE_PRIVATE);
variables.run = varReader.getBoolean("run", false);
coin = varReader.getInt("coin", 0);
health = varReader.getInt("health", 5);
}
private void save()
{
SharedPreferences.Editor varReader = app.getSharedPreferences(PREFS_NAME_MAIN, 0).edit();
varReader.putBoolean("run", variables.run);
varReader.putInt("coin", coin);
varReader.putInt("health", health);
varReader.apply();
}
private void textupgrade(){
coinText.setText(""+coin);
healthText.setText(""+health);
}
}
ClickService.java
package com.mygame.test;
import android.app.IntentService;
import android.content.Intent;
import android.os.Handler;
public class ClickService extends IntentService
{
private final Handler handler = new Handler();
private final Runnable addHealth = new Runnable()
{
public void run()
{
variables.health++;
if (!variables.run) handler.removeCallbacksAndMessages(null);
else if (variables.run) handler.postDelayed(addHealth, 1000);
}
};
public ClickService()
{
super("ClickService");
}
#Override
protected void onHandleIntent(Intent activeClick)
{
handler.postDelayed(addHealth, 500);
}
}
variables.java
package com.mygame.test;
public class variables {
static int coin;
static int health;
static boolean run;
}

Oh, i fixed it :D ClickService was not registered in AndroidManifest
<service
android:name=".ClickService"
android:exported="false" />

Losing state of the activity when navigating from notification to activity

I have an activity named Player Activity in which I am streaming music with the help of MediaPlayer API. Whenever my activity is created a notification is displayed which has some basic control of the music player.
So when I tap on my notification it jumps back to the Player Activity, but the state of the activity is lost.
Before tapping on notification :
After tapping on notification :
Here is the code of my notification's Pending Intent
Intent notifyIntent = new Intent(context, PlayerActivity.class);
notifyIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK);
notifyIntent.setAction("android.intent.action.MAIN");
notifyIntent.addCategory("android.intent.category.LAUNCHER");
PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, notifyIntent, PendingIntent.FLAG_UPDATE_CURRENT);
Here is the code for PlayerActivity.java :
package com.example.user.musicplayer;
import android.app.ProgressDialog;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.media.MediaMetadataRetriever;
import android.media.MediaPlayer;
import android.os.AsyncTask;
import android.os.Handler;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.SeekBar;
import android.widget.TextView;
import android.widget.Toast;
import com.squareup.picasso.Picasso;
import java.util.concurrent.TimeUnit;
import de.hdodenhof.circleimageview.CircleImageView;
public class PlayerActivity extends AppCompatActivity implements MediaPlayer.OnBufferingUpdateListener,MediaPlayer.OnCompletionListener{
private static Button btn_play_pause;
private Button btnToggleRepeat;
private Button btnStop;
private SeekBar seekBar;
private TextView textView;
public static MediaPlayer mediaPlayer;
private int mediaFileLength;
private int realtimeLength;
private String musicUrl;
private String imageUrl;
final Handler handler = new Handler();
private boolean isRepeat;
private CircleImageView musicImage;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_player);
Log.d("TAG", "onCreate");
NotificationGenerator.customBigNotification(getApplicationContext());
musicUrl = getIntent().getStringExtra("musicUrl");
imageUrl = getIntent().getStringExtra("imageUrl");
seekBar = (SeekBar)findViewById(R.id.seekbar);
seekBar.setMax(99); // 100% (0~99)
seekBar.setOnTouchListener(new View.OnTouchListener() {
#Override
public boolean onTouch(View v, MotionEvent event) {
if(mediaPlayer.isPlaying())
{
SeekBar seekBar = (SeekBar)v;
int playPosition = (mediaFileLength/100)*seekBar.getProgress();
mediaPlayer.seekTo(playPosition);
}
return false;
}
});
textView = (TextView)findViewById(R.id.txtTime);
btnToggleRepeat = findViewById(R.id.btnRepeat);
btnStop = findViewById(R.id.btnStop);
musicImage = findViewById(R.id.musicImgView);
Picasso.get().load(imageUrl).placeholder(R.drawable.music).error(R.drawable.music).into(musicImage);
btn_play_pause = (Button) findViewById(R.id.btnTogglePlay);
btn_play_pause.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
final ProgressDialog mDialog = new ProgressDialog(PlayerActivity.this);
AsyncTask<String,String,String> mp3Play = new AsyncTask<String, String, String>() {
#Override
protected void onPreExecute() {
mDialog.setMessage("Please wait");
mDialog.show();
}
#Override
protected String doInBackground(String... params) {
try{
mediaPlayer.setDataSource(params[0]);
mediaPlayer.prepare();
}
catch (Exception ex)
{
}
return "";
}
#Override
protected void onPostExecute(String s) {
mediaFileLength = mediaPlayer.getDuration();
realtimeLength = mediaFileLength;
if(!mediaPlayer.isPlaying())
{
playMusic();
}
else
{
pauseMusic();
}
updateSeekBar();
mDialog.dismiss();
}
};
mp3Play.execute(musicUrl); // direct link mp3 file
}
});
btnToggleRepeat.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if(isRepeat){
isRepeat = false;
mediaPlayer.setLooping(false);
btnToggleRepeat.setText("Repeat");
}
else{
isRepeat = true;
mediaPlayer.setLooping(true);
btnToggleRepeat.setText("Single");
}
}
});
btnStop.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
try {
mediaPlayer.pause();
mediaPlayer.stop();
}
catch (Exception e){
Toast.makeText(PlayerActivity.this, "Opps! sorry something bad happened", Toast.LENGTH_SHORT).show();
}
}
});
mediaPlayer = new MediaPlayer();
mediaPlayer.setOnBufferingUpdateListener(this);
mediaPlayer.setOnCompletionListener(this);
}
public void pauseMusic() {
mediaPlayer.pause();
btn_play_pause.setText("Play");
}
public void playMusic() {
mediaPlayer.start();
btn_play_pause.setText("Pause");
}
private void updateSeekBar() {
seekBar.setProgress((int)(((float)mediaPlayer.getCurrentPosition() / mediaFileLength)*100));
if(mediaPlayer.isPlaying())
{
Runnable updater = new Runnable() {
#Override
public void run() {
updateSeekBar();
realtimeLength-=1000; // declare 1 second
textView.setText(String.format("%d:%d",TimeUnit.MILLISECONDS.toMinutes(realtimeLength),
TimeUnit.MILLISECONDS.toSeconds(realtimeLength) -
TimeUnit.MILLISECONDS.toSeconds(TimeUnit.MILLISECONDS.toMinutes(realtimeLength))));
}
};
handler.postDelayed(updater,1000); // 1 second
}
}
#Override
protected void onResume() {
super.onResume();
Log.d("TAG", "onResume");
}
#Override
protected void onStart() {
super.onStart();
Log.d("TAG", "onStart");
}
#Override
public void onBufferingUpdate(MediaPlayer mp, int percent) {
seekBar.setSecondaryProgress(percent);
}
#Override
public void onCompletion(MediaPlayer mp) {
if(!mediaPlayer.isLooping())
btn_play_pause.setText("Play");
}
#Override
protected void onStop() {
super.onStop();
}
#Override
protected void onPause() {
super.onPause();
}
public static class DownloadCancelReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
Log.d("notificationPlayer","Received Cancelled Event");
}
}
}
Thanks in advance. Pardon me if the explanation is not clear, because if i might have right words to explain it, I would have googled it.

Add this to your PlayerActivity activity in manifest :
android:launchMode="singleTask"
And use these flags in the intent for pendingintent :
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
intent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);

Error of Glide library: You cannot start a load from a destroyed Activity

I'm using Recycle Adapter class and using this to populate the fragments with blog image and description. But when I close the BlogActivity and move to Next Activity then sometimes suddenly app get crashed with error of
java.lang.IllegalArgumentException:You cannot start a load for a destryoed activity at com.bumptech.glide.manager.RequestManagerRetriever.asseertNotDestroyed(RequestManagerRetriver.java:312)
My Recycle adapter classs code is
package com.nepalpolice.cdp;
import android.annotation.TargetApi;
import android.content.Context;
import android.content.Intent;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.Build;
import android.support.annotation.NonNull;
import android.support.v7.widget.RecyclerView;
import android.text.format.DateFormat;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.PopupWindow;
import android.widget.TextView;
import android.widget.Toast;
import com.bumptech.glide.Glide;
import com.bumptech.glide.request.RequestOptions;
import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.firestore.DocumentSnapshot;
import com.google.firebase.firestore.EventListener;
import com.google.firebase.firestore.FieldValue;
import com.google.firebase.firestore.FirebaseFirestore;
import com.google.firebase.firestore.FirebaseFirestoreException;
import com.google.firebase.firestore.QuerySnapshot;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import de.hdodenhof.circleimageview.CircleImageView;
import static com.android.volley.VolleyLog.TAG;
import static com.nepalpolice.cdp.webfaq.isNetworkStatusAvialable;
public class BlogRecyclerAdapter extends RecyclerView.Adapter<BlogRecyclerAdapter.ViewHolder> {
public List<BlogPost> blog_list;
public Context context;
private FirebaseFirestore firebaseFirestore;
private FirebaseAuth firebaseAuth;
private PopupWindow popWindow;
public BlogRecyclerAdapter(List<BlogPost> blog_list){
this.blog_list = blog_list;
}
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.blog_list_item, parent, false);
context = parent.getContext();
firebaseFirestore = FirebaseFirestore.getInstance();
firebaseAuth = FirebaseAuth.getInstance();
return new ViewHolder(view);
}
#Override
public void onBindViewHolder(final ViewHolder holder, int position) {
holder.setIsRecyclable(false);
final String blogPostId = blog_list.get(position).BlogPostId;
final String currentUserId = firebaseAuth.getCurrentUser().getUid();
String desc_data = blog_list.get(position).getDesc();
holder.setDescText(desc_data);
String image_url = blog_list.get(position).getImage_url();
String thumbUri = blog_list.get(position).getImage_thumb();
holder.setBlogImage(image_url, thumbUri);
String user_id = blog_list.get(position).getUser_id();
//User Data will be retrieved here...
firebaseFirestore.collection("Users").document(user_id).get().addOnCompleteListener(new OnCompleteListener<DocumentSnapshot>() {
#Override
public void onComplete(#NonNull Task<DocumentSnapshot> task) {
if(task.isSuccessful()){
String userName = task.getResult().getString("name");
String userImage = task.getResult().getString("image");
holder.setUserData(userName, userImage);
} else {
//Firebase Exception
}
}
});
try {
long millisecond = blog_list.get(position).getTimestamp().getTime();
String dateString = DateFormat.format("MM/dd/yyyy", new Date(millisecond)).toString();
holder.setTime(dateString);
} catch (Exception e) {
Toast.makeText(context, "Exception : " + e.getMessage(), Toast.LENGTH_SHORT).show();
}
//Get Likes Count
firebaseFirestore.collection("Posts/" + blogPostId + "/Likes").addSnapshotListener(((Main2Activity) context),new EventListener<QuerySnapshot>() {
#Override
public void onEvent(QuerySnapshot documentSnapshots, FirebaseFirestoreException e) {
if (e!=null) {
Log.w(TAG, "listening failed",e);
return;
}
if(!documentSnapshots.isEmpty()){
int count = documentSnapshots.size();
holder.updateLikesCount(count);
} else {
holder.updateLikesCount(0);
}
}
});
//Get Likes
firebaseFirestore.collection("Posts/" + blogPostId + "/Likes").document(currentUserId).addSnapshotListener(((Main2Activity) context),new EventListener<DocumentSnapshot>() {
#Override
public void onEvent(DocumentSnapshot documentSnapshot, FirebaseFirestoreException e) {
if (e!=null) {
Log.w(TAG, "listening failed",e);
return;
}
if (documentSnapshot.exists()){
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
holder.blogLikeBtn.setImageDrawable(context.getDrawable(R.mipmap.action_like_accent));
}
else {
holder.blogLikeBtn.setImageDrawable(context.getResources().getDrawable(R.mipmap.action_like_accent));
}
} else {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
holder.blogLikeBtn.setImageDrawable(context.getDrawable(R.mipmap.action_like_gray));
}else{
holder.blogLikeBtn.setImageDrawable(context.getResources().getDrawable(R.mipmap.action_like_gray));
}
}
}
});
//Likes Feature
holder.blogLikeBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
firebaseFirestore.collection("Posts/" + blogPostId + "/Likes").document(currentUserId).get().addOnCompleteListener(new OnCompleteListener<DocumentSnapshot>() {
#Override
public void onComplete(#NonNull Task<DocumentSnapshot> task) {
if(!task.getResult().exists()){
Map<String, Object> likesMap = new HashMap<>();
likesMap.put("timestamp", FieldValue.serverTimestamp());
firebaseFirestore.collection("Posts/" + blogPostId + "/Likes").document(currentUserId).set(likesMap);
} else {
firebaseFirestore.collection("Posts/" + blogPostId + "/Likes").document(currentUserId).delete();
}
}
});
}
});
holder.blogCommentBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent commentIntent = new Intent(context, CommentsActivity.class);
context.startActivity(commentIntent);
}
});
}
#Override
public int getItemCount() {
return blog_list.size();
}
public class ViewHolder extends RecyclerView.ViewHolder {
private View mView;
private TextView descView;
private ImageView blogImageView;
private TextView blogDate;
private TextView blogUserName;
private CircleImageView blogUserImage;
private ImageView blogLikeBtn;
private TextView blogLikeCount;
private ImageView blogCommentBtn;
public ViewHolder(View itemView) {
super(itemView);
mView = itemView;
blogLikeBtn = mView.findViewById(R.id.blog_like_btn);
blogCommentBtn = mView.findViewById(R.id.blog_comment_icon);
}
public void setDescText(String descText){
descView = mView.findViewById(R.id.blog_desc);
descView.setText(descText);
}
public void setBlogImage(String downloadUri, String thumbUri){
blogImageView = mView.findViewById(R.id.blog_image);
RequestOptions requestOptions = new RequestOptions();
requestOptions.placeholder(R.drawable.image_placeholder);
Glide.with(context).applyDefaultRequestOptions(requestOptions).load(downloadUri).thumbnail(
Glide.with(context).load(thumbUri)
).into(blogImageView);
}
public void setTime(String date) {
blogDate = mView.findViewById(R.id.blog_date);
blogDate.setText(date);
}
public void setUserData(String name, String image){
blogUserImage = mView.findViewById(R.id.blog_user_image);
blogUserName = mView.findViewById(R.id.blog_user_name);
blogUserName.setText(name);
RequestOptions placeholderOption = new RequestOptions();
placeholderOption.placeholder(R.drawable.profile_placeholder);
Glide.with(context).applyDefaultRequestOptions(placeholderOption).load(image).into(blogUserImage);
}
public void updateLikesCount(int count){
blogLikeCount = mView.findViewById(R.id.blog_like_count);
blogLikeCount.setText(count + " Likes");
}
}
}
and my MainActivity code is
public class MainActivity extends AppCompatActivity {
private Toolbar mainToolbar;
private FirebaseAuth mAuth;
private FirebaseFirestore firebaseFirestore;
private String current_user_id;
private FloatingActionButton addPostBtn;
private HomeFragment homeFragment;
private BottomNavigationView mainbottomNav;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mAuth = FirebaseAuth.getInstance();
firebaseFirestore = FirebaseFirestore.getInstance();
mainToolbar = (Toolbar) findViewById(R.id.main_toolbar);
setSupportActionBar(mainToolbar);
getSupportActionBar().setTitle("Central Department of Physics");
mainToolbar.setNavigationOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent newPostIntent = new Intent(Main2Activity.this, MainActivity.class);
startActivity(newPostIntent);
}
});
mainbottomNav = findViewById(R.id.mainBottomNav);
// FRAGMENTS
homeFragment = new HomeFragment();
replaceFragment(homeFragment);
mainbottomNav.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
#Override
public boolean onNavigationItemSelected(#NonNull MenuItem item) {
switch (item.getItemId()){
case R.id.bottom_action_home :
replaceFragment(homeFragment);
return true;
case R.id.bottom_action_account:
return true;
case R.id.bottom_action_notif:
return true;
default:
return false;
}
}
});
addPostBtn = findViewById(R.id.add_post_btn);
addPostBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent newPostIntent = new Intent(Main2Activity.this, NewPostActivity.class);
startActivity(newPostIntent);
}
});
}
#Override
protected void onStart() {
super.onStart();
FirebaseUser currentUser = FirebaseAuth.getInstance().getCurrentUser();
if(currentUser == null){
Intent loginIntent = new Intent(Main2Activity.this, LoginActivity.class);
startActivity(loginIntent);
finish();
} else {
current_user_id = mAuth.getCurrentUser().getUid();
firebaseFirestore.collection("Users").document(current_user_id).get().addOnCompleteListener(new OnCompleteListener<DocumentSnapshot>() {
#Override
public void onComplete(#NonNull Task<DocumentSnapshot> task) {
if(task.isSuccessful()){
if(!task.getResult().exists()){
Intent setupIntent = new Intent(MainActivity.this, SetupActivity.class);
startActivity(setupIntent);
finish();
}
} else {
String errorMessage = task.getException().getMessage();
Toast.makeText(Main2Activity.this, "Error : " + errorMessage, Toast.LENGTH_LONG).show();
}
}
});
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main_menu, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.action_logout_btn:
logOut();
return true;
case R.id.action_settings_btn:
Intent settingsIntent = new Intent(MainActivity.this, SetupActivity.class);
startActivity(settingsIntent);
return true;
default:
return false;
}
}
private void logOut() {
mAuth.signOut();
sendToLogin();
}
private void sendToLogin() {
Intent loginIntent = new Intent(MainActivity.this, LoginActivity.class);
startActivity(loginIntent);
finish();
}
private void replaceFragment(Fragment fragment){
FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.main_container, fragment);
fragmentTransaction.commit();
}
}
Here is the complete code https://github.com/akshayejh/PhotoBlog-Android-Blog-App

Check whether your activity is finishing before using Glide. Something like this:
if (!activity.isFinishing()) {
Glide.with(...
}

ExoPlayer onResume() Restore Playback State

I have implemented the Player and now there is a problem. When the video is playing and if the app is closed and resumed, the video screen freezes. I even saw the ExoPlayer Demo Activity from Google for better understanding but I could not get through it for implementing in my app. I have attached the Player Activity here and for the full code, I am sharing the GitHub repository for all files.
RecipeStepDetailFragment.java
package com.example.android.recipe.ui;
import android.content.Context;
import android.content.res.Configuration;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.support.v4.app.Fragment;
import android.support.v4.content.ContextCompat;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;
import com.example.android.recipe.R;
import com.example.android.recipe.pojo.Recipe;
import com.example.android.recipe.pojo.Step;
import com.google.android.exoplayer2.LoadControl;
import com.google.android.exoplayer2.SimpleExoPlayer;
import com.google.android.exoplayer2.source.ExtractorMediaSource;
import com.google.android.exoplayer2.ui.AspectRatioFrameLayout;
import com.google.android.exoplayer2.ui.SimpleExoPlayerView;
import java.util.ArrayList;
import java.util.List;
import com.google.android.exoplayer2.DefaultLoadControl;
import com.google.android.exoplayer2.ExoPlayerFactory;
import com.google.android.exoplayer2.extractor.DefaultExtractorsFactory;
import com.google.android.exoplayer2.source.MediaSource;
import com.google.android.exoplayer2.trackselection.AdaptiveVideoTrackSelection;
import com.google.android.exoplayer2.trackselection.DefaultTrackSelector;
import com.google.android.exoplayer2.trackselection.TrackSelection;
import com.google.android.exoplayer2.upstream.BandwidthMeter;
import com.google.android.exoplayer2.upstream.DefaultBandwidthMeter;
import com.google.android.exoplayer2.upstream.DefaultDataSourceFactory;
import com.google.android.exoplayer2.util.Util;
import com.squareup.picasso.Picasso;
import static com.example.android.recipe.ui.RecipeActivity.SELECTED_INDEX;
import static com.example.android.recipe.ui.RecipeActivity.SELECTED_RECIPES;
import static com.example.android.recipe.ui.RecipeActivity.SELECTED_STEPS;
public class RecipeStepDetailFragment extends Fragment {
private SimpleExoPlayerView simpleExoPlayerView;
private SimpleExoPlayer player;
private BandwidthMeter bandwidthMeter;
private ArrayList<Step> steps = new ArrayList<>();
private int selectedIndex;
private Handler mainHandler;
ArrayList<Recipe> recipe;
String recipeName;
public RecipeStepDetailFragment() { }
private ListItemClickListener itemClickListener;
public interface ListItemClickListener {
void onListItemClick(List<Step> allSteps,int Index,String recipeName);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
TextView textView;
mainHandler = new Handler();
bandwidthMeter = new DefaultBandwidthMeter();
itemClickListener =(RecipeDetailActivity)getActivity();
recipe = new ArrayList<>();
if(savedInstanceState != null) {
steps = savedInstanceState.getParcelableArrayList(SELECTED_STEPS);
selectedIndex = savedInstanceState.getInt(SELECTED_INDEX);
recipeName = savedInstanceState.getString("Title");
}
else {
steps =getArguments().getParcelableArrayList(SELECTED_STEPS);
if (steps!=null) {
steps =getArguments().getParcelableArrayList(SELECTED_STEPS);
selectedIndex=getArguments().getInt(SELECTED_INDEX);
recipeName=getArguments().getString("Title");
}
else {
recipe =getArguments().getParcelableArrayList(SELECTED_RECIPES);
steps=(ArrayList<Step>)recipe.get(0).getSteps();
selectedIndex=0;
}
}
View rootView = inflater.inflate(R.layout.recipe_step_detail_fragment_body_part, container, false);
textView = (TextView) rootView.findViewById(R.id.recipe_step_detail_text);
textView.setText(steps.get(selectedIndex).getDescription());
textView.setVisibility(View.VISIBLE);
simpleExoPlayerView = (SimpleExoPlayerView) rootView.findViewById(R.id.playerView);
simpleExoPlayerView.setResizeMode(AspectRatioFrameLayout.RESIZE_MODE_FIT);
String videoURL = steps.get(selectedIndex).getVideoURL();
if (rootView.findViewWithTag("sw600dp-port-recipe_step_detail")!=null) {
recipeName=((RecipeDetailActivity) getActivity()).recipeName;
((RecipeDetailActivity) getActivity()).getSupportActionBar().setTitle(recipeName);
}
String imageUrl=steps.get(selectedIndex).getThumbnailURL();
if (imageUrl!="") {
Uri builtUri = Uri.parse(imageUrl).buildUpon().build();
ImageView thumbImage = (ImageView) rootView.findViewById(R.id.thumbImage);
Picasso.with(getContext()).load(builtUri).into(thumbImage);
}
if (!videoURL.isEmpty()) {
initializePlayer(Uri.parse(steps.get(selectedIndex).getVideoURL()));
if (rootView.findViewWithTag("sw600dp-land-recipe_step_detail")!=null) {
getActivity().findViewById(R.id.fragment_container2).setLayoutParams(new LinearLayout.LayoutParams(-1,-2));
simpleExoPlayerView.setResizeMode(AspectRatioFrameLayout.RESIZE_MODE_FIXED_WIDTH);
}
else if (isInLandscapeMode(getContext())){
textView.setVisibility(View.GONE);
}
}
else {
player=null;
simpleExoPlayerView.setForeground(ContextCompat.getDrawable(getContext(), R.drawable.ic_visibility_off_white_36dp));
simpleExoPlayerView.setLayoutParams(new LinearLayout.LayoutParams(300, 300));
}
Button mPrevStep = (Button) rootView.findViewById(R.id.previousStep);
Button mNextstep = (Button) rootView.findViewById(R.id.nextStep);
mPrevStep.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
if (steps.get(selectedIndex).getId() > 0) {
if (player!=null){
player.stop();
}
itemClickListener.onListItemClick(steps,steps.get(selectedIndex).getId() - 1,recipeName);
}
else {
Toast.makeText(getActivity(),"You already are in the First step of the recipe", Toast.LENGTH_SHORT).show();
}
}});
mNextstep.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
int lastIndex = steps.size()-1;
if (steps.get(selectedIndex).getId() < steps.get(lastIndex).getId()) {
if (player!=null){
player.stop();
}
itemClickListener.onListItemClick(steps,steps.get(selectedIndex).getId() + 1,recipeName);
}
else {
Toast.makeText(getContext(),"You already are in the Last step of the recipe", Toast.LENGTH_SHORT).show();
}
}});
return rootView;
}
private void initializePlayer(Uri mediaUri) {
if (player == null) {
TrackSelection.Factory videoTrackSelectionFactory = new AdaptiveVideoTrackSelection.Factory(bandwidthMeter);
DefaultTrackSelector trackSelector = new DefaultTrackSelector(mainHandler, videoTrackSelectionFactory);
LoadControl loadControl = new DefaultLoadControl();
player = ExoPlayerFactory.newSimpleInstance(getContext(), trackSelector, loadControl);
simpleExoPlayerView.setPlayer(player);
String userAgent = Util.getUserAgent(getContext(), "Baking App");
MediaSource mediaSource = new ExtractorMediaSource(mediaUri, new DefaultDataSourceFactory(getContext(), userAgent), new DefaultExtractorsFactory(), null, null);
player.prepare(mediaSource);
player.setPlayWhenReady(true);
}
}
#Override
public void onSaveInstanceState(Bundle currentState) {
super.onSaveInstanceState(currentState);
currentState.putParcelableArrayList(SELECTED_STEPS,steps);
currentState.putInt(SELECTED_INDEX,selectedIndex);
currentState.putString("Title",recipeName);
}
public boolean isInLandscapeMode( Context context ) {
return (context.getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE);
}
#Override
public void onDetach() {
super.onDetach();
if (player!=null) {
player.stop();
player.release();
}
}
#Override
public void onDestroyView() {
super.onDestroyView();
if (player!=null) {
player.stop();
player.release();
player=null;
}
}
#Override
public void onStop() {
super.onStop();
if (player!=null) {
player.stop();
player.release();
}
}
#Override
public void onPause() {
super.onPause();
if (player!=null) {
player.stop();
player.release();
}
}
}
Complete Project Repository: https://github.com/mtp2697/Udacity-AndroidDeveloperNanodegree-BakingApp
Help with the restoring of the state of video player for onPause() and onResume()
Thanks,
Praveen Thirumurugan.

I faced the same problem in my submission for the baking app and I did something like this:
private void initPlayer() {
// Exoplayer
// 1. Create a default TrackSelector
// Handler mainHandler = new Handler();
videoTrackSelectionFactory = new AdaptiveTrackSelection.Factory(bandwidthMeter);
trackSelector = new DefaultTrackSelector(videoTrackSelectionFactory);
RenderersFactory render = new DefaultRenderersFactory(getContext());
mainHandler = new Handler();
if (CookieHandler.getDefault() != DEFAULT_COOKIE_MANAGER) {
CookieHandler.setDefault(DEFAULT_COOKIE_MANAGER);
}
// 2. Create a default LoadControl
LoadControl loadControl = new DefaultLoadControl();
// 3. Create the player
recipeVideoPlayer = ExoPlayerFactory.newSimpleInstance(render, trackSelector, loadControl);
// exoPlayerView = (SimpleExoPlayerView) v.findViewById(R.id.exoplayer_recipe);
// Set media controller
mExoplayer.setUseController(true);
mExoplayer.setControllerVisibilityListener(this);
mExoplayer.requestFocus();
// Bind the player to the view.
mExoplayer.setPlayer(recipeVideoPlayer);
if (TextUtils.isEmpty(mSteps.getVideoURL())) {
mExoplayer.setVisibility(View.GONE);
} else {
mExoplayer.setVisibility(View.VISIBLE);
Uri video = Uri.parse(mSteps.getVideoURL());
DefaultDataSourceFactory dataSourceFactory = new DefaultDataSourceFactory(getContext(), Util.getUserAgent(getContext(), "recipes"), null);
ExtractorsFactory extractorsFactory = new DefaultExtractorsFactory();
MediaSource videoSource = new ExtractorMediaSource(video, dataSourceFactory, extractorsFactory, mainHandler, null);
boolean haveResumePosition = resumeWindow != C.INDEX_UNSET;
if (haveResumePosition) {
recipeVideoPlayer.seekTo(resumeWindow, resumePosition);
}
recipeVideoPlayer.prepare(videoSource, !haveResumePosition, false);
recipeVideoPlayer.setPlayWhenReady(true);
recipeVideoPlayer.addListener(new ExoPlayer.EventListener() {
#Override
public void onTimelineChanged(Timeline timeline, Object manifest) {
}
#Override
public void onTracksChanged(TrackGroupArray trackGroups, TrackSelectionArray trackSelections) {
// Toast.makeText(getContext(), "Track changed" + trackSelections.length, Toast.LENGTH_SHORT).show();
//
}
#Override
public void onLoadingChanged(boolean isLoading) {
}
#Override
public void onPlayerStateChanged(boolean playWhenReady, int playbackState) {
}
#Override
public void onPlayerError(ExoPlaybackException error) {
clearResumePosition();
}
#Override
public void onPositionDiscontinuity() {
// updateResumePosition();
}
#Override
public void onPlaybackParametersChanged(PlaybackParameters playbackParameters) {
}
});
}
}
private void releasePlayer() {
if (recipeVideoPlayer != null) {
updateResumePosition();
recipeVideoPlayer.stop();
recipeVideoPlayer.release();
recipeVideoPlayer = null;
}
}
#Override
public void onResume() {
super.onResume();
if (recipeVideoPlayer == null) {
initPlayer();
}
}
#Override
public void onPause() {
super.onPause();
releasePlayer();
}
you can refer my project here