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How to pass data from Activity A to fragment in Activity B?

I need to pass data from Activity "MainCalendar" to fragment "AddTaskFragment" in Activity "Add". I have a button in a fragment which opens an Activity "MainCalendar", where I select a date in the calendar, and then I need to send this date into a fragment.
When I click on Choose Button, there is opens a MainCalendar, where user need to choose date, after that, the activity closed, and than I want to put a date from MainCalendar to the text of "Choose Button".
Add Activity with a fragment,
MainCalendar Activity:MainCalendar
MainCalendar.class:
public class MainCalendar extends AppCompatActivity {
private CalendarView Calendar;
private String date;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_calendar);
Calendar = (CalendarView) findViewById(R.id.calendarView);
Calendar.setOnDateChangeListener(new CalendarView.OnDateChangeListener() {
#Override
public void onSelectedDayChange(#NonNull CalendarView view, int year, int month, int dayOfMonth) {
date = (dayOfMonth+"/"+month+"/"+year);
System.out.println(date);
Intent intent = new Intent(MainCalendar.this, Add.class);
intent.putExtra("DATE_KEY", date);
finish();
}
});
}
Add.class:
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_add);
BottomNavigationView bottomNav = findViewById(R.id.bottom_nav);
bottomNav.setSelectedItemId(R.id.add);
Button notes_button = findViewById(R.id.notes_btn);
Button tasks_button = findViewById(R.id.tasks_btn);
Button goals_button = findViewById(R.id.goals_btn);
RadioButton rb = findViewById(R.id.choose_day_btn);
String date = null;
Bundle extras = getIntent().getExtras();
if (extras != null) {
//The key argument here must match that used in the other activity
date = extras.getString("DATE_KEY");
}
AddTasksFragment frag = new AddTasksFragment();
Bundle bundle = new Bundle();
bundle.putString("DATE_KEY", date);
frag.setArguments(bundle);
Fragment fragment1 = new AddTasksFragment();
getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,fragment1).commit();
bottomNav.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
#Override
public boolean onNavigationItemSelected(#NonNull MenuItem item) {
switch (item.getItemId()){
case R.id.notes:
startActivity(new Intent(getApplicationContext(), Notes.class));
overridePendingTransition(0,0);
return true;
case R.id.add:
return true;
case R.id.tasks:
startActivity(new Intent(getApplicationContext(), Tasks.class));
overridePendingTransition(0,0);
return true;
case R.id.goals:
startActivity(new Intent(getApplicationContext(), Goals.class));
overridePendingTransition(0,0);
return true;
case R.id.statistics:
startActivity(new Intent(getApplicationContext(), Statistics.class));
overridePendingTransition(0,0);
return true;
}
return false;
}
});
Fragment fragment = new AddTasksFragment();
getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,fragment).commit();
tasks_button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Fragment fragment = new AddTasksFragment();
getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,fragment).commit();
}
});
notes_button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Fragment fragment = new AddNotesFragment();
getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,fragment).commit();
}
});
goals_button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Fragment fragment = new AddGoalsFragment();
getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,fragment).commit();
}
});
//
AddTaskFragment.class, which is in Add.class:
#Nullable
#Override
public View onCreateView(#NonNull LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
return inflater.inflate(R.layout.add_tasks_fragment, container, false);
}
#Override
public void onViewCreated(View view, #Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
subtask_btn = (Button) view.findViewById(R.id.add_subtask_btn);
subtask_name = (EditText) view.findViewById(R.id.subtask_name);
task_name = (EditText) view.findViewById(R.id.task_name);
lin_lay = (LinearLayout) view.findViewById(R.id.linear_layout);
sb_lay = (LinearLayout) view.findViewById(R.id.subtask_lay);
apply_btn = (Button) view.findViewById(R.id.apply_btn);
rgDay = (RadioGroup) view.findViewById(R.id.date_group);
rgPriority = (RadioGroup) view.findViewById(R.id.priority_group);
todayBtn = (RadioButton) view.findViewById(R.id.today_btn);
tomorrowBtn = (RadioButton) view.findViewById(R.id.tomorrow_btn);
chooseDayBtn = (RadioButton) view.findViewById(R.id.choose_day_btn);
lowPrBtn = (RadioButton) view.findViewById(R.id.low_btn);
mediumPrBtn = (RadioButton) view.findViewById(R.id.medium_btn);
highPrBtn = (RadioButton) view.findViewById(R.id.high_btn);
firebaseAuth = FirebaseAuth.getInstance();
firebaseUser = FirebaseAuth.getInstance().getCurrentUser();
dataBase = FirebaseDatabase.getInstance().getReference(TASKS_KEY);
this.getResources().getDisplayMetrics();
subtask_btn.setOnClickListener(this);
apply_btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
writeTask();
}
});
chooseDayBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(getActivity(), MainCalendar.class);
startActivity(intent);
}
});
String data;
data = getActivity().getIntent().getStringExtra(DATE_KEY);
}
#Override
public void onClick(View v) {
addView();
}
private void writeTask() {
String Task;
Task = task_name.getText().toString();
dataBase.push().setValue(Task);
String[] subTasks = new String[sb_lay.getChildCount()];
for (int i = 0; i < sb_lay.getChildCount(); i++) {
View subtaskView = sb_lay.getChildAt(i);
EditText editTextName = (EditText) subtaskView.findViewById(R.id.subtask_name);
subTasks[i] = editTextName.getText().toString();
dataBase.child(Task).child("Subtasks").push().setValue(subTasks[i]);
}
dataBase.child(Task).push().setValue(getDay());
}
private String getDay(){
String day=null;
if(todayBtn.isChecked()){
Date currentTime = Calendar.getInstance().getTime();
day = currentTime.toString();
}
else if(tomorrowBtn.isChecked()){
Date dt = new Date();
Calendar c = Calendar.getInstance();
c.setTime(dt);
c.add(Calendar.DATE, 1);
dt = c.getTime();
day = dt.toString();
}else if(chooseDayBtn.isChecked()) {
day = getArguments().getString("DATE_KEY");
System.out.println(" Date is choosed ----------------------------------------------------------------------------" + day);
chooseDayBtn.setText(day);
}
return day;
}
private void addView(){
final View subtaskView = getLayoutInflater().inflate(R.layout.subtask_raw, null, false);
EditText editText = (EditText)subtaskView.findViewById(R.id.subtask_name);
ImageView imageClose = (ImageView)subtaskView.findViewById(R.id.remove_subtask);
imageClose.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
removeView(subtaskView);
}
});
sb_lay.addView(subtaskView);
String day;
day = getArguments().getString("DATE_KEY");
System.out.println(" Date is choosed " + day);
}
private void removeView(View view){
sb_lay.removeView(view);
}

As I understood, you Have to activities (Activity A and Activity B) and you have a fragment in Activity B. What you want to do is sending some data from activity A to that fragment for whatever reason.
Let's have a note first, You can't directly send data to any fragment of activity without launching it. So in order to send this data to the fragment you have to pass it from Activity A to Activity B as a first step and then send it from Activity B to the Fragment as a second step.
The type of data is very important. If you are sending a custom type (a model java class) you have to define it as Parcelable or if it is a primitive type such as int or float so you can send it directly
this is how to do it in Java
ActivityA.java
class ActivityA extends Activity{
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activityA);
// define your data here
int data = 5;
// define an intent to send the data to the second activity
Intent intent = new Intent(getBaseContext(), SignoutActivity.class);
intent.putExtra("DATA_KEY", data);
startActivity(intent);
}
}
Then what we need to do is
receiving the data in the Activity B
Inflating the fragment
pass the data to the fragment
class ActivityB extends Activity{
Int data;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activityB);
Bundle extras = getIntent().getExtras();
if (extras != null) {
//The key argument here must match that used in the other activity
data = extras.getInt("DATA_KEY");
}
// Fragment instance
FragmentClass frag = new FragmentClass();
Bundle bundle = new Bundle();
bundle.putInt("DATA_KEY", data );
frag.setArguments(bundle);
FragmentManager fragmentManager = getFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.replace(R.id.fragment_container, mFeedFragment);
fragmentTransaction.commit();
}
}
and then receive it the same way we received it in the Activity B

How to properly display a custom dialog in an adapter

I have a custom adapter in my app, and i launch several activities from there, one of the populated lists in the adapter takes you back to the login screen which works fine, but I decided to add a confirmation dialog before taking the user to the login screen, but I get an error saying android.content.ActivityNotFoundException: No Activity found to handle Intent { }
This is what I've implemented so far
AccountAdapter.java
class MyViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{
TextView title;
ImageView icon;
MyViewHolder(View view) {
super(view);
view.setClickable(true);
view.setOnClickListener(this);
mCtx = view.getContext();
title = view.findViewById(R.id.title);
icon = view.findViewById(R.id.icon);
}
#Override
public void onClick(View v) {
Intent intent = new Intent();
switch (getAdapterPosition()){
case 0:
intent = new Intent(mCtx, SettingsActivity.class);
break;
case 1:
intent = new Intent(mCtx, ProfileActivity.class);
break;
case 2:
intent = new Intent(mCtx, ChangePasswordActivity.class);
break;
default:
CustomAlertDialog alert = new CustomAlertDialog((Activity)mCtx);//faulty code
alert.show();
break;
}
mCtx.startActivity(intent);
}
}
CustomAlertDialog.java
public class CustomAlertDialog extends Dialog implements android.view.View.OnClickListener {
public Activity c;
public Dialog d;
// public Button yes, no;
public TextView yes, no;
public CustomAlertDialog(Activity a) {
super(a);
// TODO Auto-generated constructor stub
this.c = a;
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.custom_alert_dialog);
yes = (TextView) findViewById(R.id.btn_yes);
// no = (Button) findViewById(R.id.btn_no);
yes.setOnClickListener(this);
// no.setOnClickListener(this);
}
#Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.btn_yes:
break;
default:
break;
}
dismiss();
}
}
AccountFragment.java (where I populate the account adapter)
private void prepareAccountData() {
// if (mAdapter == null) {
// return;
// }
AccountModel options = new AccountModel("Settings", R.drawable.ic_action_settings);
accountList.add(options);
options = new AccountModel("Update Profile", R.drawable.ic_social_person_outline);
accountList.add(options);
options = new AccountModel("Change Password", R.drawable.ic_hardware_security);
accountList.add(options);
options = new AccountModel("Logout", R.drawable.ic_action_exit_to_app);
accountList.add(options);
mAdapter.notifyDataSetChanged();
}
and this is the code I use for direct logout which works aswell
((Activity)mCtx).finish();
SharedPreferences sharedPreferences = mCtx.getSharedPreferences("key", Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPreferences.edit();
editor.clear();
editor.apply();
intent = new Intent(mCtx, LoginActivity.class);
How can I implement the custom dialog in my adapter?

Your code has bug you don't init intent in case show dialog, you should move logic into onClick in your Dialog, move this mCtx.startActivity(intent); into case
#Override
public void onClick(View v) {
switch (getAdapterPosition()){
case 0:
mCtx.startActivity(new Intent(mCtx, SettingsActivity.class));
break;
case 1:
mCtx.startActivity(new Intent(mCtx, ProfileActivity.class));
break;
case 2:
mCtx.startActivity(new Intent(mCtx, ChangePasswordActivity.class));
break;
default:
CustomAlertDialog alert = new CustomAlertDialog((Activity)mCtx)
alert.show();
break;
}
}

Android putExtra push data with same key from different buttons

I have a code that uses putextra method to push data from activity to another, I want to push different values using the same key
code:
String int_value = "int_value";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button btn1 = (Button) findViewById(R.id.btn1);
btn1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent intent = new Intent(MainActivity.this, SecondScreen.class);
intent.putExtra(int_value , 0);
startActivity(intent);
}
});
Button btn2 = (Button) findViewById(R.id.btn2);
btn2.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent intent = new Intent(MainActivity.this, SecondScreen.class);
intent.putExtra(int_value , 1);
startActivity(intent);
}
});
And in the next activity:
int value;
String int_value = "int_value";
View myLayout;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_second_screen);
Intent intent = getIntent();
int temp = intent.getIntExtra(int_value, value);
myLayout = findViewById(R.id.myLayout);
switch (value){
case 0:
myLayout.setBackgroundResource(R.drawable.a);
Log.e("VALUE" , String.valueOf(value));
break;
case 1:
myLayout.setBackgroundResource(R.drawable.b);
Log.e("VALUE" , String.valueOf(value));
break;
}
But the background always changes to a.jpg although I passed 0 & 1 (or a least I thought I did...)
what is the problem here?

just change value in switch to temp
switch ( temp){
case 0:
myLayout.setBackgroundResource(R.drawable.a);
Log.e("VALUE" , String.valueOf(value));
break;
case 1:
myLayout.setBackgroundResource(R.drawable.b);
Log.e("VALUE" , String.valueOf(value));
break;
}
because you are saving the value inside temp
int temp = intent.getIntExtra(int_value, value);

Android studio pass ListView to another activity

I am trying to pass an array list to another activity but it seems that is not enough. I searched all day to pass the array list with "intent" but with no success. I wrote a code for learning purposes. How to pass the data and show the Arraylist in a second activity?
The action button is btn_save. If you want further details let me know.
The code is in
MainActivity (first activity):
public class MainActivity extends AppCompatActivity {
ArrayList<String> addArray = new ArrayList<>();
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final EditText editTextOne = (EditText) findViewById(R.id.editTextOne);
final EditText editTextTwo = (EditText) findViewById(R.id.editTextTwo);
Button btn_showText = (Button) findViewById(R.id.buttonShow);
final TextView textView = (TextView) findViewById(R.id.textResults);
Button btn_refresh = (Button) findViewById(R.id.btn_refresh);
Button btn_close = (Button) findViewById(R.id.btn_close);
Button btn_save = (Button) findViewById(R.id.btn_save);
final ListView showMe = (ListView) findViewById(R.id.list_items);
btn_showText.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
String text = editTextOne.getText().toString();
String textTwo = editTextTwo.getText().toString();
if (text.length() == 0 || textTwo.length() == 0){
textView.setText("You must enter Name & Surname");
}else {
textView.setText(Html.fromHtml(
"<font color=\"red\">"+ text + "</font> " +
"<font color=\"blue\"><b>" + textTwo + " </b></font>"));
}
}
});
btn_refresh.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
finish();
startActivity(getIntent());
}
});
btn_close.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
finish();
System.exit(0);
}
});
btn_save.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// Context context = getApplicationContext();
// CharSequence mytext = "Hahahaha";
// int duration = Toast.LENGTH_SHORT;
// Toast toast = Toast.makeText(context,mytext,duration);
// toast.show();
String text = editTextOne.getText().toString();
String textTwo = editTextTwo.getText().toString();
String getInput = text + textTwo;
if (addArray.contains(getInput)){
Toast.makeText(getBaseContext(), "Item already Added!", Toast.LENGTH_LONG).show();
}
else if (getInput == null || getInput.trim().equals("")){
Toast.makeText(getBaseContext(), "Input field is empty", Toast.LENGTH_LONG).show();
}
else{
addArray.add(getInput);
ArrayAdapter<String> adapter = new ArrayAdapter<>(MainActivity.this, android.R.layout.simple_list_item_1, addArray);
showMe.setAdapter(adapter);
Intent intent = new Intent(MainActivity.this, ListOfNames.class);
((EditText)findViewById(R.id.editTextOne)).setText(" ");
((EditText)findViewById(R.id.editTextTwo)).setText(" ");
}
}
});
}
public void onButtonClick(View v){
if (v.getId() == R.id.btn_list){
Intent i = new Intent(MainActivity.this, ListOfNames.class);
startActivity(i);
}
}
}
ListOfNames second activity: (almost empty)
public class ListOfNames extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.list_screen);
}
}

If you are trying to pass a arraylist of string then it will be easy. Just pass arraylist with intent like this:
ArrayList<String> list = new ArrayList<String>();
Intent intent = new Intent(ActivityOne.this, ActivityTwo.class);
intent.putStringArrayListExtra("key", list);
startActivity(intent);
And receive it in ActivityTwo like this:
ArrayList<String> list = getIntent().getStringArrayListExtra("key");

I found a temporary solution for this (The app is not broke). The only problem is the arraylist didn't increased. It contains and show only the last value.
Main Activity:
...
else{
// addArray.add(getInput);
// ArrayAdapter<String> adapter = new ArrayAdapter<>(MainActivity.this, android.R.layout.simple_list_item_1, addArray);
// showMe.setAdapter(adapter);
Intent intent = new Intent(MainActivity.this, ListOfNames.class);
intent.putExtra("data", getInput);
startActivity(intent);
// ((EditText)findViewById(R.id.editTextOne)).setText(" ");
// ((EditText)findViewById(R.id.editTextTwo)).setText(" ");
}
...
ListOfNames (Second Activity):
public class ListOfNames extends Activity {
ArrayList<String> addArrayT = new ArrayList<>();
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.list_screen);
Bundle bundle = getIntent().getExtras();
String data = bundle.getString("data");
Button btn_more = (Button) findViewById(R.id.btn_more);
ListView showMe = (ListView) findViewById(R.id.list_items);
addArrayT.add(data);
ArrayAdapter<String> adapterT = new ArrayAdapter<>(ListOfNames.this, android.R.layout.simple_list_item_1, addArrayT);
showMe.setAdapter(adapterT);
}
public void onClickMore(View v){
if (v.getId() == R.id.btn_more){
Intent i = new Intent(ListOfNames.this, MainActivity.class);
startActivity(i);
}
}
}

Passing value from one activity to another doesn't work

I tried looking on other questions but nothing seems to work. Trying to pass the value stored in sUsername from activity Username.java to MainActivity.java (username).
This is Username.java:
public class Username extends ActionBarActivity implements View.OnClickListener {
EditText eUsername;
Button login;
String sUsername;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_username);
eUsername = (EditText) findViewById (R.id.username);
sUsername = eUsername.getText().toString();
login = (Button)findViewById(R.id.login);
login.setOnClickListener(this);
}
private void loginClick() {
Intent intent = new Intent(this, MainActivity.class );
intent.putExtra("containsUsername", sUsername); //first argument is the name of the string being passed
startActivity(intent);
}
public void onClick (View v) {
switch (v.getId()) {
case R.id.login:
loginClick();
break;
}
}
and this is MainActivity.java
public class MainActivity extends ActionBarActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Intent intent = getIntent();
Bundle bundle = intent.getExtras();
String username = bundle.getString("containsUsername");
WebView listOfSongs = (WebView) findViewById (R.id.webview);
String url = "http://ws.audioscrobbler.com/2.0/?method=user.gettoptracks&user="+username+"&api_key=68f82cd7b37e7b23800c2025066531c9&format=json";
listOfSongs.loadUrl(url);
}

your loginCheck Method should be like this:
private void loginClick() {
sUsername = eUsername.getText().toString();
Intent intent = new Intent(this, MainActivity.class );
intent.putExtra("containsUsername", sUsername); //first argument is the name of the string being
startActivity(intent);
}
As in on create your edittext might be empty.

Please check your edittext is empty or not. Chnage your method longClick.
private void loginClick(){
if(!sUsername.isEmpty()) {
Intent intent = new Intent(this, MainActivity.class );
intent.putExtra("containsUsername", sUsername);
startActivity(intent);
} else {
Toast.makeText(Username.this, "Please enter username.", Toast.LENGTH_LONG).show();
}
}