I'm using a fragment because I used a nav drawer menu. After I click "Category" menu it will take me to "Category" fragment and in that fragment, I have added a floating action bar that will take you to "Add category" activity.
Since fragments can't be viewed in AndroidManifest.xml file, I can't make a fragment as a parent. What I want is to add a "Back Button" from "Add category" activity, display a toast message (If sure to leave without saving changes..etc) and will go back to "Category" fragment.
I have tried using "onBackPressed()" and "getSuppoerActionBar()" that will show a toast but when running the app, the toast message will just show up in a few seconds and will go back to "Category" fragment.
Please help. Thanks!
Here is my code.
CategoriesFragment.java
package com.example.devcash;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.design.widget.FloatingActionButton;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
/**
* A simple {#link Fragment} subclass.
*/
public class CategoriesFragment extends Fragment {
public CategoriesFragment() {
// Required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_categories, container, false);
//add floating action button
FloatingActionButton categories_fab = view.findViewById(R.id.addcategories_fab);
categories_fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
// when add fab is pressed, go to add product activity
Intent addprod = new Intent(getActivity(), AddCategoryActivity.class);
startActivity(addprod);
}
});
return view;
}
#Override
public void onViewCreated(#NonNull View view, #Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
getActivity().setTitle("Categories");
}
}
AddCategoryActivity.java
package com.example.devcash;
import android.content.DialogInterface;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.MenuItem;
public class AddCategoryActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_add_category);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
}
#Override
public void onBackPressed() {
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Unsaved changes");
builder.setMessage("Are you sure you want to leave without saving changes?");
builder.setPositiveButton("LEAVE", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
AddCategoryActivity.super.onBackPressed();
}
});
builder.setNegativeButton("CANCEL", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
finish();
}
});
builder.show();
super.onBackPressed();
}
}
You need to remove below code from onBackPressed() as it is calling super class method and eventually destroying activity.
super.onBackPressed();
To handle toolbar back add following code
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
// todo: goto back activity from here
onBackPressed();
default:
return super.onOptionsItemSelected(item);
}
}
Your AddCategoryActivity should be like this
public class AddCategoryActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_add_category);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
}
#Override
public void onBackPressed() {
quitActivity();
}
private void quitActivity() {
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Unsaved changes");
builder.setMessage("Are you sure you want to leave without saving changes?");
builder.setPositiveButton("LEAVE", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
finish();
}
});
builder.setNegativeButton("CANCEL", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
builder.show();
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
if (item.getItemId() == android.R.id.home) {
quitActivity();
return true;
} else
return super.onOptionsItemSelected(item);
}
}
you can use EventBus.
class Activity{
fun backToFragment(){
EventBus.postEvent(BackToFragmentEvent())
}
}
class HomeActivity{
EventBus.register{
fragmentmanager.replace(CategoriesFragment)
}
}
Related
This is my Profile fragment and I am having three of them in main Activity.
Here I am using Sign out functionality but it is not working.
package com.example.user.transroads;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v7.app.AlertDialog;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import com.google.firebase.auth.FirebaseAuth;
public class ProfileFragment extends Fragment {
private FirebaseAuth firebaseAuth;
public static ProfileFragment newInstance() {
ProfileFragment fragment = new ProfileFragment();
return fragment;
// Required empty public constructor
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
firebaseAuth = FirebaseAuth.getInstance();
setHasOptionsMenu(true);
}
#Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
// TODO Add your menu entries here
super.onCreateOptionsMenu(menu, inflater);
inflater.inflate(R.menu.item_menu, menu);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()){
case R.id.signOut:
firebaseAuth.getInstance().signOut();
return true;
}
return super.onOptionsItemSelected(item);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_profile, container, false);
}
I want to log out from a fragment. I have three of them with bottom Navigation but the sign out is not happening it should be intent on the LogInActivity.
Please help me out solve this problem.
I won't believe that signout is not working.It might be because android saves activities states.
As you are saying on clicking on signout you want to launch loginActivity.You can do this by removing all activities from back stack.
To do this use it.
case R.id.signOut:
firebaseAuth.getInstance().signOut();
Intent i = new Intent(getActivity(),
NewActivity.class);
i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK |
Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(i);
return true;
OR
for AlertDialog you can create a method alertsignout() outside onCreate() like this :
public void alertsignout()
{
AlertDialog.Builder alertDialog2 = new
AlertDialog.Builder(
getActivity());
// Setting Dialog Title
alertDialog2.setTitle("Confirm SignOut");
// Setting Dialog Message
alertDialog2.setMessage("Are you sure you want to Signout?");
// Setting Positive "Yes" Btn
alertDialog2.setPositiveButton("YES",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// Write your code here to execute after dialog
firebaseAuth.getInstance().signOut();
Intent i = new Intent(getActivity(),
NewActivity.class);
i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK |
Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(i);
}
});
// Setting Negative "NO" Btn
alertDialog2.setNegativeButton("NO",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// Write your code here to execute after dialog
Toast.makeText(getApplicationContext(),
"You clicked on NO", Toast.LENGTH_SHORT)
.show();
dialog.cancel();
}
});
// Showing Alert Dialog
alertDialog2.show();
}
And call this method like this :
case R.id.signOut:
alertsignout();
return true;
PS : I havn't tested it so if there are any error.. ask me
You need to change this line of code:
firebaseAuth.getInstance().signOut();
with
FirebaseAuth.getInstance().signOut();
I've created an Activity with a Navigation Drawer and replaced the options icon (placed in the top-right corner) with an ImageButton to handle the back click.
The problem is, that I don't know how to do it. I'm a little confused about how to use the back button. What code should I do to go to the previous Activity?
A back button for:
Activity to Another Activity and MainActivity to Fragment activity.
this is my Manifest code:
<activity
android:name="com.teamamazing.with_sidebar.activity.Accomodation"
android:label="Accomodation"
android:parentActivityName="com.teamamazing.with_sidebar.activity.SpecialPage">
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="com.teamamazing.with_sidebar.activity.SpecialPage" />
</activity>
this is my Accommodation activity:
package com.teamamazing.with_sidebar.activity;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import com.teamamazing.with_sidebar.R;
public class Accomodation extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_accomodation);
} }
and this is my SpecialPage code: which will be the parent activity.
package com.teamamazing.with_sidebar.activity;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageButton;
import com.teamamazing.with_sidebar.R;
public class SpecialPage extends AppCompatActivity {
public ImageButton accomodation;
public void init() {
accomodation = (ImageButton) findViewById(R.id.AccomodationButton);
accomodation.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Intent accomodation = new Intent(SpecialPage.this, Accomodation.class);
startActivity(accomodation);
}
});
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_special_page);
init();
}}
Thank you for the answer.
You can use onBackPressed() or finish() Method.
buttonClickOBJ.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
onBackPressed();
}
});
onBackPressed ()
Called when the activity has detected the user's press of the back
key. The default implementation simply finishes the current activity,
but you can override this to do whatever you want.
You can also use the following method.
#Override
public boolean onOptionsItemSelected(MenuItem item){
switch(item.getItemId()){
case android.R.id.home:
finish();
return true;
}
return super.onOptionsItemSelected(item);
}
Easy way
public void onBackPressed() {
AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
builder.setTitle(R.string.app_name);
builder.setIcon(R.mipmap.ic_launcher);
builder.setMessage("If You Enjoy The App Please Rate us?")
.setCancelable(false)
.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
Intent play =
new Intent(Intent.ACTION_VIEW, Uri.parse("https://play.google.com/store/apps/details?id=kd.travellingtips"));
startActivity(play);
}
})
.setNegativeButton("No", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
finish();
}
});
AlertDialog alert = builder.create();
alert.show();
}
Firstly, Add the Listener to the button you want to associate with it. Then initiate a back-press option within the method.
There is an error in 'return view' at listview.setOnItemLongClickListener method. The error says cannot return a value from a method with void result type. I am trying to create an alert dialog where it will notify the user whether it wants to delete.
package com.example.user.swen;
import android.app.AlertDialog;
import android.app.ListActivity;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.text.Html;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.List;
import com.example.user.swen.DB.RecordsDataSource;
import com.example.user.swen.Model.Records;
public class Record extends ListActivity {
public Button NewButton;
public RecordsDataSource Recordsdatasource;
ArrayAdapter<Records> RecordAdapter;
List<Records> records;
ListView listview;
Records selectedRecord;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_record);
Addrecords();
//Referencing the Database
Recordsdatasource = new RecordsDataSource(this);
Recordsdatasource.open();
LayoutInflater inflater = LayoutInflater.from(Record.this);
View view = inflater.inflate(R.layout.activity_record, null);
//set the listView to use the custom List Adapter
records = (List<Records>) Recordsdatasource.getAll();
RecordAdapter = new RecordAdapter(this, 0, (ArrayList<Records>) records);
listview = (ListView) findViewById(android.R.id.list);
listview.setAdapter(RecordAdapter);
listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
selectedRecord = records.get(position);
AlertDialog.Builder a_builder = new AlertDialog.Builder(Record.this);
a_builder.setMessage("Duty: " + selectedRecord.getType())
.setCancelable(false)
.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
}
});
AlertDialog alert = a_builder.create();
alert.setTitle(Html.fromHtml("<font color='#08ae9e'>Information</font>"));
alert.show();
}
});
listview.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
#Override
public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
selectedRecord = records.get(position);
AlertDialog.Builder a_builder = new AlertDialog.Builder(Record.this);
a_builder.setMessage("Are you sure you want to delete?")
.setCancelable(false)
.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
deleteItem(selectedRecord);
}
})
.setNegativeButton("No", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
AlertDialog alert = a_builder.create();
alert.setTitle(Html.fromHtml("<font color='#08ae9e'>Alert!!</font>"));
alert.show();
return true;
}
});
return view;
}
public void Addrecords() {
NewButton = (Button) findViewById(R.id.NewButton);
NewButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent addrecords = new Intent(Record.this, NewRecord.class);
startActivity(addrecords);
}
});
}
public static void showToast(Context context, String text) {
Toast.makeText(context, text, Toast.LENGTH_LONG).show();
}
private void deleteItem(Records selectedRecord) {
Recordsdatasource.removeRecords(selectedRecord);
showToast(this, "Usage deleted");
RecordAdapter.notifyDataSetChanged();
RecordAdapter.notifyDataSetInvalidated();
refreshDisplay();
}
private void refreshDisplay() {
records = Recordsdatasource.getAll();
RecordAdapter.clear();
RecordAdapter.addAll(records);
}
}
You are trying to return a View from your Activity's onCreate() method.
#Override
protected void onCreate(Bundle savedInstanceState) {
LayoutInflater inflater = LayoutInflater.from(Record.this);
View view = inflater.inflate(R.layout.activity_record, null);
//...
return view;
}
As you can see, onCreate() in an Activity has a void return type, meaning you shouldn't be returning anything in this method.
From the looks of your code, you are attempting to use this layout as the Activity's layout, but you are confusing the View inflation code with that used in a Fragment's onCreateView() method, which does indeed require you to return a View.
In an Activity, you need to call setContentView() to set the layout. You can either set the layout using the resource ID via setContentView(R.layout.activity_record), or if you want to inflate the View yourself you can call setContentView(view).
The call return view is actually located in onCreate. The function onCreate is declared to return nothing (void). Therefore, you cannot return an instance of View. You just have to remove that line or replace it with return; Also, onItemLongClick must return a boolean. So you can't move return view there either.
I am having issue with my app, my app loads however when I click on "options" button it stops working and quits the app.
Can someone help me?
first code is from options.java class and second code is from mainactivity
package com.example.sportsquizzone;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
/**
* Created by Usman on 22/02/2016.
*/
public class options extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.options);
}
public void onButtonClick(View view) {
Intent b = new Intent(this, MainActivity.class);
b.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(b);
}
public void btnAbout(View view) {
AlertDialog.Builder About = new AlertDialog.Builder(this);
About.setMessage("* Developed by Usman Saddique \n* Developed on \n* This game runs on Android version 4.2 and above")
.setPositiveButton("Close", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
})
.setTitle("About")
.setIcon(R.drawable.question_mark)
.create();
About.show();
}
}
package com.example.sportsquizzone;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
public void onButtonClick(View v)
{
if(v.getId() == R.id.btnPlay)
{
Intent i = new Intent(MainActivity.this, level.class);
startActivity(i);
}
if(v.getId() == R.id.btnOptions)
{
Intent i = new Intent(MainActivity.this, option.class);
startActivity(i);
}
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
public void Instructions(View view) {
final AlertDialog.Builder Instructions = new AlertDialog.Builder(this);
Instructions.setMessage("The SQZ is designed to test your knowledge across variety of sports, to play: \n1. Click Play \n2. Select Dificulty \n3. when quiz begins, four answers will be provided select the correct one. ")
.setPositiveButton("Got It", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
})
.setTitle("Instructions")
.setIcon(R.drawable.question_mark)
.create();
Instructions.show();
}
public void btnQuit(View view) {
new AlertDialog.Builder(this)
.setIcon(R.drawable.warning)
.setTitle("Closing Application")
.setMessage("Are you sure you want to Quit?")
.setPositiveButton("Yes", new DialogInterface.OnClickListener()
{
#Override
public void onClick(DialogInterface dialog, int which) {
finish();
}
})
.setNegativeButton("No", null)
.show();
}
}
I can not see the your logcat error but I think you have created the "option" class and its layout separately. So if it is what you have done , probably you have forgotten to declare the activity on manifest:
include it on your manifest:
This question already has answers here:
Receive result from DialogFragment
(15 answers)
Closed 9 years ago.
I want the DialogFragment to return a value to me that was entered in editQuantity when dismissed.
But i am not getting any way to make it work. I can do this by passing the value through the intent but that destroys the progress of the current activity.
Is there any way other than passing through intent that will return me value?
package com.example.myprojectname;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.DialogInterface.OnClickListener;
import android.os.Bundle;
import android.support.v4.app.DialogFragment;
import android.text.InputType;
import android.util.Log;
import android.widget.EditText;
public class QuantityDialogFragment extends DialogFragment implements OnClickListener {
private EditText editQuantity;
#Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
editQuantity = new EditText(getActivity());
editQuantity.setInputType(InputType.TYPE_CLASS_NUMBER);
return new AlertDialog.Builder(getActivity())
.setTitle(R.string.app_name)
.setMessage("Please Enter Quantity")
.setPositiveButton("OK", this)
.setNegativeButton("CANCEL", null)
.setView(editQuantity)
.create();
}
#Override
public void onClick(DialogInterface dialog, int position) {
String value = editQuantity.getText().toString();
Log.d("Quantity: ", value);
dialog.dismiss();
}
}
Assuming that you want to foward result to the calling Activity:) try this code snippet:
public class QuantityDialogFragment extends DialogFragment implements OnClickListener {
private EditText editQuantity;
#Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
editQuantity = new EditText(getActivity());
editQuantity.setInputType(InputType.TYPE_CLASS_NUMBER);
return new AlertDialog.Builder(getActivity()).setTitle(R.string.app_name).setMessage("Please Enter Quantity")
.setPositiveButton("OK", this).setNegativeButton("CANCEL", null).setView(editQuantity).create();
}
#Override
public void onClick(DialogInterface dialog, int position) {
String value = editQuantity.getText().toString();
Log.d("Quantity: ", value);
MainActivity callingActivity = (MainActivity) getActivity();
callingActivity.onUserSelectValue(value);
dialog.dismiss();
}
}
and on Your activity add :
public class MainActivity extends FragmentActivity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
QuantityDialogFragment dialog = new QuantityDialogFragment();
dialog.show(getSupportFragmentManager(), "Dialog");
}
/**
* callback method from QuantityDialogFragment, returning the value of user
* input.
*
* #param selectedValue
*/
public void onUserSelectValue(String selectedValue) {
// TODO add your implementation.
}
}
Taking this idea a little further, I created a listener interface inside the dialog and implemented it in the main activity.
public interface OnDialogResultListener {
public abstract void onPositiveResult(String value);
public abstract void onNegativeResult();
}
public void setOnDialogResultListener(OnDialogResultListener listener) {
this.onDialogResultListener = listener;
}
Call onNegativeResult() inside an overriden onCancel(DialogInterface) and onPositiveResult(String) where you want your dialog to return the value.
Note: don't forget to dismiss() your dialog after calling onPositiveResult() or the dialog window will stay opened.
Then inside your main activity you can create a listener for the dialog, like so:
QuantityDialogFragment dialog = new QuantityDialogFragment();
dialog.setOnDialogResultListener(new QuantityDialogFragment.OnDialogResultListener() {
#Override
public void onPositiveResult(String value) {
//Do something...
}
#Override
public void onNegativeResult() {
//Do something...
}
});
This will make your dialog easier to reuse later.