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how to show a dialog after 1 or 2 min after opning app for first time

I want to show a custom XML dialog dialogue that will appear after a specific time in the first run, let's say after a min
how can I do it
but I'm confused about what should I do in a situation like below
if the user open the app for the first time and just spent 30 sec and just pause the app(screen lock or in onPause) or just close the app completely
Just as a note - I have already implemented a one time show dialog(directly in main activity without any layout file ) when the app runs for the first time already
Code
To view the already implemented dialog(shows up on the first run) please
go to the // Caution dialog (showDialog method)
MainActivity.java
public class MainActivity extends AppCompatActivity {
MediaPlayer player1;
MediaPlayer player2;
SeekBar seekBar1;
SeekBar seekBar2;
TextView elapsedTimeLable1;
TextView elapsedTimeLable2;
TextView remainingTimeLable1;
TextView remainingTimeLable2;
ImageView play1;
ImageView play2;
int totalTime1;
#SuppressLint("HandlerLeak")
private final Handler handler1 = new Handler() {
#SuppressLint("SetTextI18n")
#Override
public void handleMessage(#NonNull Message msg) {
int currentPosition1 = msg.what;
//Update SeekBar
seekBar1.setProgress(currentPosition1);
// Update Timelable
String elapsedTime1 = createTimerLable1(currentPosition1);
elapsedTimeLable1.setText(elapsedTime1);
String remainingTime1 = createTimerLable1(totalTime1 - currentPosition1);
remainingTimeLable1.setText("- " + remainingTime1);
}
};
int totalTime2;
#SuppressLint("HandlerLeak")
private final Handler handler2 = new Handler() {
#SuppressLint("SetTextI18n")
#Override
public void handleMessage(#NonNull Message msg) {
int currentPosition2 = msg.what;
// Update SeekBar
seekBar2.setProgress(currentPosition2);
// Update Timelable
String elapsedTime2 = createTimerLable2(currentPosition2);
elapsedTimeLable2.setText(elapsedTime2);
String remainingTime2 = createTimerLable2(totalTime2 - currentPosition2);
remainingTimeLable2.setText("- " + remainingTime2);
}
};
#RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
#SuppressLint("ObsoleteSdkInt")
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
Window w = getWindow();
// clear FLAG_TRANSLUCENT_STATUS flag:
w.clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
// add FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS flag to the window
w.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
// finally change the color
w.setStatusBarColor(ContextCompat.getColor(this, R.color.Card_Elevation_Color));
}
// PlayButton * The ButtonClick is in the last if you want to jump directly there *
play1 = findViewById(R.id.playbtn1);
play2 = findViewById(R.id.playbtn2);
// TimeLables
elapsedTimeLable1 = findViewById(R.id.cTime1);
elapsedTimeLable2 = findViewById(R.id.cTime2);
remainingTimeLable1 = findViewById(R.id.tTime1);
remainingTimeLable2 = findViewById(R.id.tTime2);
// MediaPlayer
player1 = MediaPlayer.create(this, R.raw.dog_howl);
player1.setLooping(true);
player1.seekTo(0);
totalTime1 = player1.getDuration();
player2 = MediaPlayer.create(this, R.raw.dog_bark);
player2.setLooping(true);
player2.seekTo(0);
totalTime2 = player2.getDuration();
//SeekBar
seekBar1 = findViewById(R.id.seekbar1);
seekBar2 = findViewById(R.id.seekbar2);
seekBar1.setMax(totalTime1);
seekBar2.setMax(totalTime2);
seekBar1.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
#Override
public void onProgressChanged(SeekBar seekBar, int progress1, boolean fromUser1) {
if (fromUser1) {
player1.seekTo(progress1);
seekBar1.setProgress(progress1);
}
}
#Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
#Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
});
seekBar2.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
#Override
public void onProgressChanged(SeekBar seekBar, int progress2, boolean fromUser2) {
if (fromUser2) {
player2.seekTo(progress2);
seekBar2.setProgress(progress2);
}
}
#Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
#Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
});
// Thread (Update SeekBar & TimeLabel)
new Thread(() -> {
while (player1 != null) {
try {
Message msg = new Message();
msg.what = player1.getCurrentPosition();
handler1.sendMessage(msg);
Thread.sleep(1000);
} catch (InterruptedException ignored) {
}
}
}).start();
new Thread(() -> {
while (player2 != null) {
try {
Message msg = new Message();
msg.what = player2.getCurrentPosition();
handler2.sendMessage(msg);
Thread.sleep(1000);
} catch (InterruptedException ignored) {
}
}
}).start();
// Admob Banner Ad
MobileAds.initialize(this, initializationStatus -> {
});
AdView mAdView = findViewById(R.id.adView);
AdRequest adRequest = new AdRequest.Builder().build();
mAdView.loadAd(adRequest);
// Caution dialog
SharedPreferences preferences = getSharedPreferences("prefs", MODE_PRIVATE);
boolean firstStart = preferences.getBoolean("firstStart", true);
if (firstStart) {
showDialog();
}
}
// Caution dialog
private void showDialog() {
new AlertDialog.Builder(this)
.setTitle("Caution!")
.setMessage("In case you're wearing any kind of headphones please remove it before playing the ' Howl ' audio")
.setPositiveButton("ok", (dialogInterface, i) -> dialogInterface.dismiss())
.create().show();
SharedPreferences preferences = getSharedPreferences("prefs", MODE_PRIVATE);
SharedPreferences.Editor editor = preferences.edit();
editor.putBoolean("firstStart", false);
editor.apply();
}
public String createTimerLable1(int duration) {
String timerLabel1 = "";
int min = duration / 1000 / 60;
int sec = duration / 1000 % 60;
timerLabel1 += min + ":";
if (sec < 10) timerLabel1 += "0";
timerLabel1 += sec;
return timerLabel1;
}
public String createTimerLable2(int duration) {
String timerLabel2 = "";
int min = duration / 1000 / 60;
int sec = duration / 1000 % 60;
timerLabel2 += min + ":";
if (sec < 10) timerLabel2 += "0";
timerLabel2 += sec;
return timerLabel2;
}
public void playBtnClick1(View view) {
if (player2.isPlaying()) {
player2.pause();
play2.setImageResource(R.drawable.ic_baseline_play_circle_filled_24);
}
if (!player1.isPlaying()) {
// Stoping
player1.start();
play1.setImageResource(R.drawable.ic_baseline_pause_circle_filled_24);
} else {
// Playing
player1.pause();
play1.setImageResource(R.drawable.ic_baseline_play_circle_filled_24);
}
}
public void playBtnClick2(View view) {
if (player1.isPlaying()) {
player1.pause();
play1.setImageResource(R.drawable.ic_baseline_play_circle_filled_24);
}
if (!player2.isPlaying()) {
// Stoping
player2.start();
play2.setImageResource(R.drawable.ic_baseline_pause_circle_filled_24);
} else {
// Playing
player2.pause();
play2.setImageResource(R.drawable.ic_baseline_play_circle_filled_24);
}
}
#Override
protected void onPause() {
super.onPause();
if (player1 != null) {
player1.pause();
play1.setImageResource(R.drawable.ic_baseline_play_circle_filled_24);
}
if (player2 != null) {
player2.pause();
play2.setImageResource(R.drawable.ic_baseline_play_circle_filled_24);
}
}
}

but I'm confused about what should I do in a situation like below
if the user open the app for the first time and just spent 30 sec and just pause the app(screen lock or in onPause) or just close the
app completely
This is impossible to do if your app is closed.My suggestion would be to create a service on another process that does this dialog such that even if the app process is closed,the service process will still be running unless it is stopped explicitly.
Defining a Process of a Service
The android:process field defines the name of the process where the
service is to run. Normally, all components of an application run in
the default process created for the application. However, a component
can override the default with its own process attribute, allowing you
to spread your application across multiple processes.
If the name assigned to this attribute begins with a colon (':'), the
service will run in its own separate process.
<service android:name="com.example.appName" android:process=":externalProcess" />
This is of course in the manifest file .
You might also need to show a system dialog thus you will need a system Alert Window permission i your manifest and request for the permision on runtime.
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
Then on runtime request like this:
public static void openOverlaySettings(Activity activity) {
final Intent intent = new Intent(Settings.ACTION_MANAGE_OVERLAY_PERMISSION,
Uri.parse("package:" + activity.getPackageName()));
try {
activity.startActivityForResult(intent, 6);
} catch (ActivityNotFoundException e) {
Log.e("Drawers permission :", e.getMessage());
}
}
To check if granted use :
if(!Settings.canDrawOverlays(context)) {
openOverlaySettings(context);
ok=false;
}
Then in your service you should create the dialog like below
View aldv= LayoutInflater.from(act).inflate(R.layout.your_layout,null);
ald=new AlertDialog.Builder(act,R.style.AppTheme)
.setView(aldv)
.setCancelable(true)
.create();
ald.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);

How to remove some elements If it was contains specific values inside recycle view?

I have succeeded in making more data download and then put it inside Recycleview and I succeeded in doing that and I used everything well but the problem is that I try to load some elements if they contain a value of 3, for example inside the function Loadmore I tried to make a loop and then I put the value 3 and then delete all the value equal to this number
but I have not succeeded so far please help and put the appropriate code
// my code
public class Page_6Fragment extends android.support.v4.app.Fragment implements AdapterView.OnItemSelectedListener {
TextView th, tm, tt, tapm;
Spinner spin_h, spin_m, spin_apm, spin_day;
RadioButton radioReject,radioAccipt ;
RadioGroup radioGroup;
Button buttonDialogReject,buttonDialogAccipt;
Dialog dialog;
RecyclerView recyclerView;
List<Customer> customers;
CustomerAdapter adapter;
View rootView;
String TAG = "MainActivity - ";
Context context;
API api;
Boolean acceptOrNo = true;
Context c = null;
String lock;
public int[] userLock;
public static Page_6Fragment instance;
public static Page_6Fragment newInstance() {
Page_6Fragment fragment = new Page_6Fragment();
return fragment;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
rootView = inflater.inflate(R.layout.activity_customer, container, false);
this.context = getActivity();
this.instance = this;
recyclerView = (RecyclerView) rootView.findViewById(R.id.recycler_view);
customers = new ArrayList<>();
// Postion is index item inside recycleview =
adapter = new CustomerAdapter(Page_6Fragment.this,customers){
#Override
public void buttonClickEvent(int position){
// Toast.makeText(context,"posIs: "+position+" userLock.len= "+userLock.length,Toast.LENGTH_SHORT).show();
//showDialog(context,customers.get(position).user_id , Integer.parseInt(customers.get(position).id));
//---- condithion 1
if(customers.get(position).status ==0){
showDialog(context,customers.get(position).user_id , Integer.parseInt(customers.get(position).id));
}else{
Toast.makeText(context,"تم الرد على هذا المستخدم مسبقا", Toast.LENGTH_SHORT).show();
}
}
};
adapter.setLoadMoreListener(new CustomerAdapter.OnLoadMoreListener() {
#Override
public void onLoadMore() {
recyclerView.post(new Runnable() {
#Override
public void run() {
int index = customers.size();
loadMore(index);
}
});
//Calling loadMore function in Runnable to fix the
// java.lang.IllegalStateException: Cannot call this method while RecyclerView is computing a layout or scrolling error
}
});
recyclerView.setHasFixedSize(true);
// recyclerView.addItemDecoration(new VerticalLineDecorator(2));
recyclerView.setLayoutManager(new LinearLayoutManager(context));
recyclerView.setAdapter(adapter);
api = ServiceGenerator.createService(API.class);
load(0);
return rootView;
}
// load data first time
private void load(int index) {
Call<List<Customer>> call = api.getCustomer(index);
call.enqueue(new Callback<List<Customer>>() {
#Override
public void onResponse(Call<List<Customer>> call, final Response<List<Customer>> response) {
// Toast.makeText(MainActivity.this, "tost "+response.body().get(0).post_writer, Toast.LENGTH_LONG).show();
//Log.i("TRUE_TRUE_","Yes "+response.body().get(2).name);
if (response.isSuccessful()) {
//Log.i("TRUE_TRUE3","Yes"+response.body().toString());
//movies.addAll(response.body());
//adapter.notifyDataChanged();
getActivity().runOnUiThread(new Runnable(){
public void run() {
// No.1 ..............
// ShowDataScreen();
// Toast.makeText( MainActivity.this, "ShowDataScreen",Toast.LENGTH_SHORT).show();
//if(customers.get()){
customers.addAll(response.body());
adapter.notifyDataChanged();
initiUserlock(customers.size());
}
});// end of No.1 UI new thread
getActivity().runOnUiThread(new Runnable() {
public void run() {//No.2
// Toast.makeText( MainActivity.this, "This is correct way",Toast.LENGTH_SHORT).show();
}
});// end of No.2 UI new thread
// Toast.makeText(MainActivity.this, "tost "+response.body().get(0).post_writer, Toast.LENGTH_LONG).show();
} else {
Log.e(TAG, " Response Error " + String.valueOf(response.code()));
}
}
#Override
public void onFailure(Call<List<Customer>> call, Throwable t) {
Log.e(TAG, " Response Error " + t.getMessage());
}
});
}
// laod more data ...................................
private void loadMore(int index) {
// add loading progress view ....
//Toast.makeText(context, "loadMore", Toast.LENGTH_LONG).show();
customers.add(new Customer("load"));
// customers.get(index).user_id =2;
adapter.notifyItemInserted(customers.size() - 1);
Call<List<Customer>> call = api.getCustomer(index);
call.enqueue(new Callback<List<Customer>>() {
#Override
public void onResponse(Call<List<Customer>> call, Response<List<Customer>> response) {
if (response.isSuccessful()) {
//Toast.makeText(context, "it is Successful", Toast.LENGTH_LONG).show();
customers.remove(customers.size() - 1);
List<Customer> result = response.body();
// Log.i("Getresult{--: ", " "+result.get());
if(result.size()>0) {
customers.addAll(result);
//add loaded data
// How to delete every item = 3 from customers list
for (int i=0; i<customers.size(); i++) {
if(customers.get(i).user_id == 3){
// customers.remove(i);
}
}
} else {
//result size 0 means there is no more data available at server
adapter.setMoreDataAvailable(false);
//telling adapter to stop calling load more as no more server data available
Toast.makeText(context,"لايوجد بيانات اخرى", Toast.LENGTH_LONG).show();
}
adapter.notifyDataChanged();
//should call the custom method adapter.notifyDataChanged here to get the correct loading status
} else {
Log.e(TAG, " Load More Response Error000 " + String.valueOf(response.code()));
}
}
#Override
public void onFailure(Call<List<Customer>> call,Throwable t) {
Log.e(TAG, " Load More Response Error_11 " + t.getMessage());
}
});
}

As you already have the new list in the result list, you can solve it by using the result List and add it to the customers List
customers.clear();
for(Customer newCustomer: result){
if(newCustomer.user_id != 3){
customers.add(newCustomer);
}
}
Second option would be to iterate over the customers list using ListIterator
ListIterator<Customer> iter = customers.listIterator();
while(iter.hasNext()){
if(iter.next().user_id == 3){
iter.remove();
}
}
Or
customers.removeIf(customer -> customer.user_id == 3);

List<ParseUser> .contains ParseUser always FALSE

I have an if statement written below:
//Set Friend Action OnClickListener & Image
if (ParseUser.getCurrentUser().getList("friendsArray").contains(searchResultsList.get(position))) {
Glide.with(holder.imgFriendAction.getContext()).load(R.drawable.ic_phone_black_24dp).into(holder.imgFriendAction);
ImageViewCompat.setImageTintList(holder.imgFriendAction, ColorStateList.valueOf(searchContext.getColor(R.color.green)));
}
else if (ParseUser.getCurrentUser().getList("pendingFriendsArray").contains(searchResultsList.get(position))) {
Glide.with(holder.imgFriendAction.getContext()).load(R.drawable.ic_check_black_24dp).into(holder.imgFriendAction);
ImageViewCompat.setImageTintList(holder.imgFriendAction, ColorStateList.valueOf(searchContext.getColor(R.color.gray_dark)));
}
else {
Glide.with(holder.imgFriendAction.getContext()).load(R.drawable.ic_person_add_black_24dp).into(holder.imgFriendAction);
ImageViewCompat.setImageTintList(holder.imgFriendAction, ColorStateList.valueOf(searchContext.getColor(R.color.colorPrimary)));
}
The problem is that every single time I run that statement it always returns FALSE for both if statements even though I know for a fact that 'friendsArray' & 'pendingFriendsArray' return TRUE in many circumstances.
Both arrays contain pointers to the _User table.
searchResultsList is declared as follows:
private List<ParseUser> searchResultsList;
I've logged all three items (friendsArray, pendingFriendsArray & searchResultsList.get(position)) to the console and they show the following:
D/friendsArray: [com.parse.ParseUser#ae66779, com.parse.ParseUser#8371cbe, com.parse.ParseUser#32d511f, com.parse.ParseUser#5fd2c6c, com.parse.ParseUser#7dd0235, com.parse.ParseUser#9c446ca, com.parse.ParseUser#5fe03b]
D/pendingFriendsArray: [com.parse.ParseUser#7c6a358, com.parse.ParseUser#3688cb1, com.parse.ParseUser#480596]
D/searchResultsList.get(position) =: com.parse.ParseUser#5fe03b
The entire class is below:
public class SearchUserAdapter extends RecyclerView.Adapter<SearchUserAdapter.ViewHolder> {
private Context searchContext;
private List<ParseUser> searchResultsList;
OnItemClickListener onItemClickListener;
public SearchUserAdapter(Context context, List<ParseUser> dataSet) {
searchContext = context;
searchResultsList = dataSet;
}
public interface OnItemClickListener {
public void onItemClick(View view, ParseUser searchUserObject, int position);
}
public void setOnItemClickListener(final OnItemClickListener onItemClickListener) {
this.onItemClickListener = onItemClickListener;
}
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(searchContext).inflate(R.layout.ly_search_user, parent,false);
return new ViewHolder(v);
}
#Override
public void onBindViewHolder(final ViewHolder holder, final int position) {
//Set User Name
holder.txtUserName.setText(searchResultsList.get(position).getString("fullName"));
//Set User Location
holder.txtUserLocation.setText(GlobalFunctions.getParseUserLocationAsString(holder.txtUserName.getContext(), searchResultsList.get(position)));
//Set User Profile Image
if (searchResultsList.get(position).getParseFile("profilePicture") != null) {
Glide.with(holder.imgUserProfilePicture.getContext()).applyDefaultRequestOptions(RequestOptions.circleCropTransform()).load(searchResultsList.get(position).getParseFile("profilePicture").getUrl()).into(holder.imgUserProfilePicture);
}
else {
Glide.with(holder.imgUserProfilePicture.getContext()).applyDefaultRequestOptions(RequestOptions.circleCropTransform()).load(R.drawable.ic_profile_place_holder).into(holder.imgUserProfilePicture);
}
//Set Row OnClickListener
holder.rlUserItem.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (searchResultsList.get(position).getObjectId().equalsIgnoreCase(ParseUser.getCurrentUser().getObjectId())) {
Intent openProfile;
openProfile = new Intent(holder.rlUserItem.getContext(), TimelineActivity.class);
holder.rlUserItem.getContext().startActivity(openProfile);
}
else {
Intent openOtherProfile = new Intent(holder.rlUserItem.getContext(), OtherUserTimelineActivity.class);
openOtherProfile.putExtra("otherUserProfileId", searchResultsList.get(position).getObjectId());
holder.rlUserItem.getContext().startActivity(openOtherProfile);
}
}
});
//Set Friend Action OnClickListener & Image
if (ParseUser.getCurrentUser().getList("friendsArray").contains(searchResultsList.get(position))) {
Glide.with(holder.imgFriendAction.getContext()).load(R.drawable.ic_phone_black_24dp).into(holder.imgFriendAction);
ImageViewCompat.setImageTintList(holder.imgFriendAction, ColorStateList.valueOf(searchContext.getColor(R.color.green)));
}
else if (ParseUser.getCurrentUser().getList("pendingFriendsArray").contains(searchResultsList.get(position))) {
Glide.with(holder.imgFriendAction.getContext()).load(R.drawable.ic_check_black_24dp).into(holder.imgFriendAction);
ImageViewCompat.setImageTintList(holder.imgFriendAction, ColorStateList.valueOf(searchContext.getColor(R.color.gray_dark)));
}
else {
Glide.with(holder.imgFriendAction.getContext()).load(R.drawable.ic_person_add_black_24dp).into(holder.imgFriendAction);
ImageViewCompat.setImageTintList(holder.imgFriendAction, ColorStateList.valueOf(searchContext.getColor(R.color.colorPrimary)));
}
holder.imgFriendAction.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
friendActionListenerAction(holder, searchResultsList.get(position));
}
});
}
private void friendActionListenerAction(ViewHolder holder, ParseUser parseUser) {
if (ParseUser.getCurrentUser().getList("friendsArray").contains(parseUser)) {
FLKCallUtils.showCallDialog(holder.imgFriendAction.getContext());
}
else if (ParseUser.getCurrentUser().getList("pendingFriendsArray").contains(parseUser)) {
//Do nothing
}
else {
//Add Friend
FLKFriendUtils.sendFriendRequestFromUserToUser(ParseUser.getCurrentUser(), parseUser);
//Update Image
Glide.with(holder.imgFriendAction.getContext()).load(R.drawable.ic_check_black_24dp).into(holder.imgFriendAction);
ImageViewCompat.setImageTintList(holder.imgFriendAction, ColorStateList.valueOf(searchContext.getColor(R.color.gray_dark)));
}
}
#Override
public int getItemCount() {
return searchResultsList.size();
}
class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
public MediumRobotoTextView txtUserName;
public RegularRobotoTextView txtUserLocation;
public RelativeLayout rlUserItem;
ImageView imgUserProfilePicture;
ImageView imgFriendAction;
public ViewHolder(View itemView) {
super(itemView);
rlUserItem = (RelativeLayout) itemView.findViewById(R.id.rl_user_container);
rlUserItem.setOnClickListener(this);
txtUserName = (MediumRobotoTextView) itemView.findViewById(R.id.txt_user_name);
txtUserLocation = (RegularRobotoTextView) itemView.findViewById(R.id.txt_user_location);
imgUserProfilePicture = (ImageView) itemView.findViewById(R.id.img_profile_picture);
imgUserProfilePicture.setOnClickListener(this);
imgFriendAction = (ImageView) itemView.findViewById(R.id.img_friend_action);
imgFriendAction.setOnClickListener(this);
}
#Override
public void onClick(View v) {
//TODO - do something here if you wish
}
}

Upon further investigation I found that the parse-android SDK does not fetch pointers the same every single time. For example when I fetch 'friendsArray', let's say right now, it will return
[com.parse.ParseUser#ae66779, com.parse.ParseUser#8371cbe, com.parse.ParseUser#32d511f, com.parse.ParseUser#5fd2c6c, com.parse.ParseUser#7dd0235, com.parse.ParseUser#9c446ca, com.parse.ParseUser#5fe03b]
However if I then fetch it, let's say in 5 minutes, it will return
[com.parse.ParseUser#ec99877, com.parse.ParseUser#674bcg, com.parse.ParseUser#749hhc, com.parse.ParseUser#6fh3d6dg, com.parse.ParseUser#jdj8dk, com.parse.ParseUser#4c966ca, com.parse.ParseUser#3f0eeb]
Additionally, I noted that even the pointer to searchResultsList.get(position) changes it's reference every time I loaded it.
The way I got around this was to create a function (seen below) that returns an array of the actual objectId's of the pointers inside the 'friendsArray'. This way I can guarantee that it will always be returning the same items and can therefore create an accurate 'contains' comparison.
public static List<String> friendsArrayObjectIdsArray() {
//Create Array of Friends
List<ParseUser> friendsArray = ParseUser.getCurrentUser().getList("friendsArray");
//Create Temp Array of Object Id's
List<String> tempObjectIdsArray = new ArrayList<>();
//Iterate List
for (ParseUser friendUser : friendsArray) {
tempObjectIdsArray.add(friendUser.getObjectId());
}
return tempObjectIdsArray;
}
I then run the following comparison to get the result I am looking for
if (FLKUserUtils.friendsArrayObjectIdsArray().contains(searchResultsList.get(position).getObjectId())) {
//Do something
}

Cant find a way to delete an item from sharedPreferences

I am trying to delete an item from taskList which is connected to sharedPreferences.
I managed to remove all items but the problem is I cant find a way to connect a counter to delete an individual item from a list that has a switch and when this switch is on true I need to remove the item from list by index number.
public class TaskAdapter extends BaseAdapter {
//transfer context
Context context;
//transfer user to use for shared preferences
String userName;
//create a list of tasks.....
List<taskItem> myTasks;
Calendar calendar = Calendar.getInstance();
PendingIntent pendingIntent;
int pos;
//constructor, for creating the adapter we need from the user context and userName
public TaskAdapter(Context context, String userName) {
this.context = context;
this.userName = userName;
//go to user shared preferences and fill the list
getData();
notifyDataSetChanged();
}
//how many item to display
#Override
public int getCount() {
//return the myTasks size....
return myTasks.size();
}
//return a specific item by index
#Override
public Object getItem(int i) {
return myTasks.get(i);
}
//return index number
#Override
public long getItemId(int i) {
return i;
}
//create our view
#Override
public View getView(final int index, final View view, ViewGroup viewGroup) {
//inflate the view inside view object -> viewInflated
final View viewInflated = LayoutInflater.from(context).inflate(R.layout.task_item, null, false);
//set our inflated view behavior
//set pointer for our inflated view
//set pointer for task name....
final TextView txtTaskName = (TextView) viewInflated.findViewById(R.id.taskName);
//set pointer for taskInfo
final TextView txtTaskInfo = (TextView) viewInflated.findViewById(R.id.taskInfo);
//set pointer for task status....
final Switch swTask = (Switch) viewInflated.findViewById(taskDone);
//set task name, by the index of my myTasks collection
txtTaskName.setText(myTasks.get(index).taskName);
//set task info, by index of myTasks collection
txtTaskInfo.setText(myTasks.get(index).taskInfo);
//set task status , switch is getting true/false
swTask.setChecked(myTasks.get(index).taskStatus);
//show date and time dialog
final ImageView dtPicker = (ImageView) viewInflated.findViewById(R.id.imgTime);
dtPicker.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
final AlertDialog.Builder ad = new AlertDialog.Builder(context);
final AlertDialog aDialog = ad.create();
final LinearLayout adLayout = new LinearLayout(context);
adLayout.setOrientation(LinearLayout.VERTICAL);
TextView txtTime = new TextView(context);
txtTime.setText("Choose time");
adLayout.addView(txtTime);
final TimePicker tp = new TimePicker(context);
adLayout.addView(tp);
final DatePicker dp = new DatePicker(context);
tp.setVisibility(View.GONE);
adLayout.addView(dp);
final Button btnNext = new Button(context);
btnNext.setText("Next>");
adLayout.addView(btnNext);
btnNext.setGravity(1);
Button btnCancel = new Button(context);
btnCancel.setText("Cancel");
adLayout.addView(btnCancel);
btnCancel.setGravity(1);
btnCancel.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
aDialog.cancel();
}
});
btnNext.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
final int hour = tp.getHour();
final int min = tp.getMinute();
final String myHour = String.valueOf(hour);
final String myMin = String.valueOf(min);
calendar.set(Calendar.MONTH, dp.getMonth());
calendar.set(Calendar.YEAR, dp.getYear());
calendar.set(Calendar.DAY_OF_MONTH, dp.getDayOfMonth());
dp.setVisibility(View.GONE);
tp.setVisibility(View.VISIBLE);
btnNext.setText("Finish");
btnNext.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
calendar.set(Calendar.HOUR_OF_DAY, tp.getHour());
calendar.set(Calendar.MINUTE, tp.getMinute());
Intent my_intent = new Intent(context, RingtonePlayingService.class);
pendingIntent = PendingIntent.getService(context, 0, my_intent, PendingIntent.FLAG_UPDATE_CURRENT);
alarmManager.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), pendingIntent);
if(hour > 12){
String myHour = String.valueOf(hour - 12);
}
if(min < 10)
{
String myMin = "0"+String.valueOf(min);
}
Toast.makeText(context, "Set for- "+tp.getHour()+":"+tp.getMinute() , Toast.LENGTH_LONG).show();
aDialog.cancel();
}
});
}
});
aDialog.setView(adLayout);
aDialog.show();
}
});
//create listener event, when switch is pressed
swTask.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
//we using utlShared to update task status
//create instance of utlShared
utlShared myShared = new utlShared(context);
//calling method of task, and giving userName(shared preferences, taskName, taskStatus)
myShared.task(userName, txtTaskName.getText().toString(), txtTaskInfo.getText().toString(), swTask.isChecked());
//we sending a message to the user, and inform him/her about the change
Toast.makeText(context, swTask.isChecked() ? "Task done" : "Task undone", Toast.LENGTH_SHORT).show();
}
});
//return the view with the behavior.....
return viewInflated;
}
private void getData() {
//go to specific shared preferences by user name.....
SharedPreferences taskPref = context.getSharedPreferences(userName, context.MODE_PRIVATE);
//create instance of our myTasks list
myTasks = new ArrayList<>();
Map<String, ?> tasks = taskPref.getAll();
for (Map.Entry<String, ?> oneTask : tasks.entrySet()) {
//insert task to list by Key and Value, we check if value is equal to 1, becuase 1=true 0=false
for(int pos=0 ; pos<myTasks.size() ; pos++){
myTasks.get(pos);
}
String[] str = oneTask.getValue().toString().split(",");
myTasks.add(new taskItem(str[0], str[1], str[2].equals("1")));
}
}
}
And my utlShared class is
public class utlShared {
//context to use later
Context context;
//declatrtion of shared preferences object
private SharedPreferences userPref;
//declaration of shared preferences editor
private SharedPreferences.Editor editor;
public utlShared() {}
public utlShared(Context context)
{
//get context to use it
this.context=context;
//declaretion of shared preferences with file name and file mode (private,public)
userPref=context.getSharedPreferences("users",Context.MODE_PRIVATE);
//declaration of editor
editor=userPref.edit();
}
//get user and password
public void addUser(String userName, String password)
{
//stores in the phone device under data\data\package name
//put in shared preferences user name and password
editor.putString(userName,password);
//commit (save/apply) the changes.
editor.commit();
}
public boolean checkUser(String userName)
{
//get name by key->userName
String checkString = userPref.getString(userName,"na");
//print to logcat a custom message.....
Log.e("checkUser", "checkUser: "+checkString );
//check if userName equals to responded data, if it's na, we don't have the user...
return !checkString.equals("na");
}
public boolean checkUserPassword(String userName, String userPassword)
{
String checkString = userPref.getString(userName,"na");
return checkString.equals(userPassword);
}
public void task(String userName,String taskName,String taskInfo, boolean taskDone)
{
//pointer to user task shared preferences
SharedPreferences taskPref=context.getSharedPreferences(userName, Context.MODE_PRIVATE);
//create editor to change the specific shared preferences
SharedPreferences.Editor taskEditor=taskPref.edit();
//add new task -> if true write 1 else write 0
if(!taskDone){
String myData = taskName+","+taskInfo+","+(taskDone?"1":"0");
taskEditor.putString(taskName,myData);
//apply the changes
taskEditor.commit();
}
}
public void clearTasks(String userName, String taskName, String taskInfo, boolean taskDone)
{
SharedPreferences taskPref=context.getSharedPreferences(userName, Context.MODE_PRIVATE);
SharedPreferences.Editor tskEditor=taskPref.edit();
tskEditor.clear();
tskEditor.commit();
}
}
This method is called from my Welcome class which is
public class Welcome extends AppCompatActivity {
String userName;
Context context;
utlShared myUtl;
ListView taskList;
String taskName;
String taskInfo;
boolean taskDone;
AlarmManager alarmManager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_welcome);
setPointer();
}
private void setPointer()
{
this.context=this;
userName=getIntent().getStringExtra("userName");
myUtl = new utlShared(context);
taskList=(ListView)findViewById(R.id.taskList);
setListData();
alarmManager = (AlarmManager)getSystemService(ALARM_SERVICE);
Toast.makeText(Welcome.this, "welcome user:"+userName, Toast.LENGTH_SHORT).show();
Button btnBack = (Button)findViewById(R.id.btnBack);
FloatingActionButton btnDelete=(FloatingActionButton)findViewById(R.id.btnDelete);
btnDelete.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
myUtl.clearTasks(userName, taskName, taskInfo, taskDone);
setListData();
}
});
btnBack.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(context, MainActivity.class);
startActivity(intent);
finish();
}
});
}
private void setListData() {
final TaskAdapter adapter = new TaskAdapter(context, userName);
taskList.setAdapter(adapter);
}
public void addCustomTask(View view)
{
//create builder
AlertDialog.Builder builder = new AlertDialog.Builder(context);
//set title
builder.setTitle("Add new task!");
//inflate view from layout ->custom layout,null,false as defualt values
View viewInflated= LayoutInflater.from(context).inflate(R.layout.dlg_new_task,null,false);
final EditText txtCustomLine = (EditText)viewInflated.findViewById(R.id.txtHLine);
final EditText txtCustomTask = (EditText)viewInflated.findViewById(R.id.txtTask);
builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialogInterface, int i) {
dialogInterface.dismiss();
}
});
builder.setPositiveButton("Add task", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialogInterface, int i) {
dialogInterface.dismiss();
String myTaskCustom = txtCustomTask.getText().toString();
String myTaskLine = txtCustomLine.getText().toString();
myUtl.task(userName, myTaskCustom, myTaskLine, false);
setListData();
}
});
//display our inflated view in screen
builder.setView(viewInflated);
//show the dialog
builder.show();
}
}
Sorry for the long code but I have spent so much time on that problem and didnt find a normal way to fix it...
Thanks in advance guys, much appreciated!

taskEditor.remove('item tag');
taskEditor.commit();

Guess my question wasnt clear enough but I have found a way to do that.
if(!taskDone){
String myData = taskName+","+taskInfo+","+(taskDone?"1":"0");
taskEditor.putString(taskName,myData);
//apply the changes
taskEditor.commit();
}
else
{
taskEditor.remove(taskName);
taskEditor.commit();
adapter.notifyDataSetChanged();
}
Eventhough its not perfect because I can refresh the view after I update the Editor and only after I restart the app my last deleted tasks disappear.
Cheers and thanks a lot guys!

how to set button invisible depending on another activity

In my activity I add to it some stuff by checking checkbox and if
list.size()>0 (this condition is in my adapter) shows up button which is redirecting me to second activity. In second activity I display listview filled with items from static list , when I click on it i delete object from list, also Ive made button in second activity which make this list.clear(); finish(); When I return to first activity i've still visible button even if static list was cleared. How to solve it ? I need the simplest ideas becouse i'm a beginner in android. All answers, suggestions, clues are wellcome. If you don't know how to do it, pop up thread. Thank you for your time.
public class TowarAdapter extends ArrayAdapter<Towar> {
private List<Towar> items;
private Activity context;
private int i = 0;
ImageButton b_zatwierdz;
int counter = 0;
boolean user_checked = false;
public int getI() {
return i;
}
public void setI(int i) {
this.i = i;
}
public TowarAdapter(Activity context, int resource, List<Towar> items,
ImageButton b_zatwierdz) {
super(context, resource);
this.b_zatwierdz = b_zatwierdz;
this.items = items;
this.context = context;
}
public int getCount() {
// TODO Auto-generated method stub
return items.size();
}
#Override
public Towar getItem(int position) {
// TODO Auto-generated method stub
return items.get(position);
}
#Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}
static class ViewHolder {
TextView tvNazwaT;
TextView tvCenaT;
ImageView ivTowar;
CheckBox chb_czy_zamowic;
}
public View getView(final int position, View convertView, ViewGroup parent) {
final ViewHolder view;
// LayoutInflater inflator = activity.getLayoutInflater();
LayoutInflater inflator = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
if (convertView == null) {
view = new ViewHolder();
convertView = inflator.inflate(R.layout.element, null);
view.tvNazwaT = (TextView) convertView.findViewById(R.id.tvNazwaT);
view.tvCenaT = (TextView) convertView.findViewById(R.id.tvCenaT);
view.chb_czy_zamowic = (CheckBox) convertView
.findViewById(R.id.chb_czy_zamowic);
view.ivTowar = (ImageView) convertView.findViewById(R.id.ivTowar);
convertView.setTag(view);
} else {
view = (ViewHolder) convertView.getTag();
}
view.tvNazwaT.setText(items.get(position).getTow_nazwa());
view.tvNazwaT.setTextColor(Color.BLACK);
view.tvCenaT.setText(items.get(position).getTow_cena() + "zł");
for (int i = 0; i < items.size(); i++) {
String s = Integer.valueOf(items.get(position).Kat_id).toString();
int resourceId = context.getResources().getIdentifier("a" + s + i,
"drawable", context.getPackageName());
view.ivTowar.setImageResource(resourceId);
}
view.chb_czy_zamowic
.setOnCheckedChangeListener(new OnCheckedChangeListener() {
#Override
public void onCheckedChanged(
final CompoundButton buttonView, boolean isChecked) {
// TODO Auto-generated method stub
if (buttonView.isChecked()) {
user_checked = true;
if (user_checked == true) {
final Dialog d1 = new Dialog(context);
d1.setContentView(R.layout.ilosc);
d1.getWindow()
.setSoftInputMode(
WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);
d1.setTitle("Wybierz ilość");
final EditText et_Ilosc;
Button b_Ok;
Button b_Odejmij;
Button b_Dodaj;
et_Ilosc = (EditText) d1
.findViewById(R.id.et_Ilosc);
et_Ilosc.setText(String.valueOf(i));
view.chb_czy_zamowic.setClickable(false);
b_Dodaj = (Button) d1
.findViewById(R.id.b_Dodaj);
b_Dodaj.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
String zmienna_pom = et_Ilosc.getText()
.toString();
i = Integer.valueOf(zmienna_pom);
if (i < 0) {
Toast t = Toast.makeText(
getContext(),
"Niepoprawna wartość",
Toast.LENGTH_SHORT);
t.show();
} else if (i == items.get(position)
.getTow_ilosc_value()) {
Toast t = Toast
.makeText(
getContext(),
"Osiągnięto wartość maksymalną "
+ items.get(
position)
.getTow_ilosc_value(),
Toast.LENGTH_SHORT);
t.show();
} else if (i > items.get(position)
.getTow_ilosc_value()) {
Toast t = Toast
.makeText(
getContext(),
"Przekroczono wartość maksymalną "
+ items.get(
position)
.getTow_ilosc_value(),
Toast.LENGTH_SHORT);
t.show();
}
else if (et_Ilosc.getText().toString()
.equals("")) {
Toast t = Toast.makeText(
getContext(),
"Uzupełnij pole ilość",
Toast.LENGTH_SHORT);
t.show();
} else {
setI(i);
int k = getI();
k++;
setI(k);
et_Ilosc.setText(String.valueOf(i));
}
}
});
b_Odejmij = (Button) d1
.findViewById(R.id.b_Odejmij);
b_Odejmij
.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
String zmienna_pom = et_Ilosc
.getText().toString();
i = Integer
.valueOf(zmienna_pom);
if (i < 0) {
Toast t = Toast
.makeText(
getContext(),
"Niepoprawna wartość",
Toast.LENGTH_SHORT);
t.show();
} else if (et_Ilosc.getText()
.toString().equals("")) {
Toast t = Toast
.makeText(
getContext(),
"Uzupełnij pole ilość",
Toast.LENGTH_SHORT);
t.show();
} else {
setI(i);
i--;
setI(i);
et_Ilosc.setText(String
.valueOf(i));
}
}
});
b_Ok = (Button) d1.findViewById(R.id.b_Ok);
b_Ok.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
String zmiennna_pom = et_Ilosc
.getText().toString();
int k = Integer.valueOf(zmiennna_pom);
if (k <= 0
|| k > items.get(position)
.getTow_ilosc_value()) {
Toast t = Toast
.makeText(
getContext(),
"Wybierz z przedziału 1-"
+ items.get(
position)
.getTow_ilosc_value(),
Toast.LENGTH_SHORT);
t.show();
} else if (et_Ilosc.getText()
.toString().equals("")) {
Toast t = Toast.makeText(
getContext(),
"Uzupełnij pole ilość",
Toast.LENGTH_SHORT);
t.show();
} else {
view.chb_czy_zamowic
.setEnabled(false);
// String zmiennna_pom = et_Ilosc
// / .getText().toString();
// int k = Integer
// .valueOf(zmiennna_pom);
items.get(position).Tow_ilosc -= k;
Towar checkedObject = new Towar();
checkedObject.Tow_ilosc = k;
checkedObject.Kat_id = items
.get(position).Kat_id;
checkedObject.kategoria = items
.get(position).kategoria;
checkedObject.Tow_cena = items
.get(position).Tow_cena;
checkedObject.Tow_id = items
.get(position).Tow_id;
checkedObject.Tow_nazwa = items
.get(position).Tow_nazwa;
MainActivity.lista_wybranych_towarow
.add(checkedObject);
k = 0;
setI(0);
// et_Ilosc.setText("");
d1.dismiss();
}
// view.chb_czy_zamowic.setChecked(false);
if (MainActivity.lista_wybranych_towarow
.size() > 0) {
b_zatwierdz
.setVisibility(View.VISIBLE);
}
else
b_zatwierdz
.setVisibility(View.INVISIBLE);
}
});
d1.show();
}
;
}
}
});
return convertView;
}
}

To make the button invisible, you need to do the following (I'm just mentioning the logic for hiding the button - you will have to implement this in a listener):
Button button = (Button) findViewById(R.layout.button_id); // Point it to the button
if(list_is_empty) {
button.setVisibility(Button.GONE); // This line hides the button
}
Know that in Android, 'GONE' is used to hide the element from the view and this space is now available in the layout. 'INVISIBLE' means that while the widget is hidden, the space for this widget is still unavailable.

You could put an extra in the intent when calling the activity, or save the flag in a shared preference. Then depending on the flag you can set the visibility to true or false?

you can use startActivityForResult here. when you delete object from list. pass back the boolean where like 'isDelete' and check this variable in onActivityResult (it is first activity) if it is true i.e object is delete so set button visibility to false else do nothing.
you can also used sharedpreferences here. track the boolean variable and depending on its value set the button visibility.
for shared preference do this :
when you delete object do this, to write boolean value to shared preferences
SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(this); //creating object of shared preference
SharedPreferences.Editor editor = preferences.edit(); //getting editor to write value
editor.putBoolean("isShow",false); //first value is key and second is the value which you are going to assign it
editor.commit();
and in your main adapter class do :
SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(this);
boolean show = preferences.getBoolean("isShow",false); //first value is key and second value is used if isShow is not defined.
if(show)
//show the button
else
//hide the button