Myujth

I have a small problem of coding.

My goal: I have 2 fragment [0] and [1]. My default fragment is [0]. Once on [1] I press the return key and I return to the fragment [0] (instead of closing the application).

Here is a code that works correctly,

knowing that the fragment [1] is already on the stack:

getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container, new FragmentUn().addToBackStack(null).commit();

and here is the code on the backPressed:

@Override
public void onBackPressed() 
 if (drawer.isDrawerOpen(GravityCompat.START)) 
 drawer.closeDrawer(GravityCompat.START);

 else if (getFragmentManager().getBackStackEntryCount() > 0)
 getFragmentManager().popBackStack();
 else 
 super.onBackPressed();
 

This code works very well but what I want to do is to add an action (popUp) once to arrive on the fragment [0] which asks the user if he wants to leave the application or not when one presses the return key (here the app simply closes)

To do this, I wrote:

@Override
 public void onBackPressed() 
 if (drawer.isDrawerOpen(GravityCompat.START)) 
 drawer.closeDrawer(GravityCompat.START);

 else if (getFragmentManager().getBackStackEntryCount() > 0)
 getFragmentManager().popBackStack();
 else 
 AlertDialog.Builder exitPopUp = new AlertDialog.Builder(this);
 exitPopUp.setTitle("Exit");
 exitPopUp.setMessage("Voulez-vous quitter L'App ?");
 exitPopUp.setPositiveButton("Oui", new DialogInterface.OnClickListener() 
 @Override
 public void onClick(DialogInterface dialogInterface, int i) 
 finish();
 
 );
 exitPopUp.setNegativeButton("Non", new DialogInterface.OnClickListener() 
 @Override
 public void onClick(DialogInterface dialogInterface, int i) 

 
 );
 exitPopUp.setNeutralButton("Noter", new DialogInterface.OnClickListener() 
 @Override
 public void onClick(DialogInterface dialogInterface, int i) 
 Intent.FLAG_ACTIVITY_MULTIPLE_TASK);
 try 
 startActivity(goToMarket);
 catch (ActivityNotFoundException e) 
 startActivity(new Intent(Intent.ACTION_VIEW,
 Uri.parse("http://play.google.com/store/apps/details?id=" + getApplicationContext().getPackageName())));
 
 
 );

 exitPopUp.show();
 

Result ==> The app immediately displays the popUp when you press return on either fragment [0] or [1]. Except what I wish is only to arrive on fragment [0] that popUp is displayed. [1] - return key -> [0] - return key -> Exit popUp.

So what must I do to make it work properly? Thank you in advance :)

 @Override
 public void onBackPressed() 
 super.onBackPressed();
 MainFragment main = (MainFragment) getSupportFragmentManager().findFragmentByTag("main");
 if (main != null && main.isVisible()) 
 if (mExitCheck < 1) 
 Toast.makeText(this, "Press back again to exit", Toast.LENGTH_SHORT).show();
 else 
 //mExitCheck = 0 is an int
 mExitCheck = 0;

 //Finish() to exit the app
 finish();
 
 mExitCheck++;
 else 
 showMain();
 
 

easiest thing to do is set an int to 0(OR any flag that lets you know you are on the first fragment) something like this.

 //do this for your first fragment
 Fragment fragment = MainFragment.newInstance();
 FragmentTransaction transaction = 
 getSupportFragmentManager().beginTransaction();
 transaction.replace(R.id.layout_container, fragment, "main").commit();
 mCurrentFrag = 0;

 // and this for others
 Fragment fragment = MainFragment.newInstance();
 FragmentTransaction transaction = 
 getSupportFragmentManager().beginTransaction();
 transaction.replace(R.id.layout_container, fragment, "main").commit();
 mCurrentFrag = 1;

then do the following

@Override
public void onBackPressed() 
 if (mCurrentFrag == MAIN_FRAG)
 runOnUiThread(new Runnable() 
 @Override
 public void run() 
 AlertDialog.Builder exitPopUp = new AlertDialog.Builder(MainActivity.this);
 exitPopUp.setTitle("Exit");
 exitPopUp.setMessage("Are you sure you want to exit?");
 exitPopUp.setPositiveButton("Oui", new DialogInterface.OnClickListener() 
 @Override
 public void onClick(DialogInterface dialogInterface, int i) 
 finish();
 
 );
 exitPopUp.setNegativeButton("Non", new DialogInterface.OnClickListener() 
 @Override
 public void onClick(DialogInterface dialogInterface, int i) 

 
 );
 exitPopUp.setNeutralButton("Noter", new DialogInterface.OnClickListener() 
 @Override
 public void onClick(DialogInterface dialogInterface, int i) 
 Intent.FLAG_ACTIVITY_NEW_DOCUMENT 
 );

 exitPopUp.show();
 
 );
 else
 super.onBackPressed();