Android Proper Way to use onBackPressed with Toast

Question

I wrote a piece of code that will give the user a prompt asking them to press back again if they would like to exit  I currently have my code working to an extent but I know it is written poorly and I assume there is a better way to do it  Any suggestions would be helpful   Code   public void onBackPressed        backpress    backpress   1       Toast makeText getApplicationContext      Press Back again to Exit    Toast LENGTH SHORT  show         if  backpress gt 1            this finish

User · Answer

use to  onBackPressed   to back Activity specify   Override public void onBackPressed        backpress    backpress   1       Toast makeText getApplicationContext      Press Back again to Exit    Toast LENGTH SHORT  show         if  backpress gt 1            this finish

User · Answer

Both your way and  Steve s way are acceptable ways to prevent accidental exits   If choosing to continue with your implementation  you will need to make sure to have backpress initialized to 0  and probably implement a Timer of some sort to reset it back to 0 on keypress  after a cooldown period     5 seconds seems right

User · Answer

I use this much simpler approach     public class XYZ extends Activity       private long backPressedTime   0        used by onBackPressed          Override     public void onBackPressed               to prevent irritating accidental logouts         long t   System currentTimeMillis            if  t - backPressedTime  gt  2000          2 secs             backPressedTime   t              Toast makeText this   Press back again to logout                                   Toast LENGTH SHORT  show              else         this guy is serious                clean up             super onBackPressed             bye

User · Answer

If you want to exit your application from direct Second Activity without going to First Activity then try this code     In Second Activity put this code      Override public void onBackPressed         new AlertDialog Builder this               setTitle  Really Exit                 setMessage  Are you sure you want to exit                 setNegativeButton android R string no  null               setPositiveButton android R string yes  new DialogInterface OnClickListener                      public void onClick DialogInterface arg0  int arg1                        setResult RESULT OK  new Intent   putExtra  EXIT   true                        finish                                      create   show        And Your First Activity Put this code       public class FirstActivity extends AppCompatActivity    Button next  private final static int EXIT CODE   100    Override protected void onCreate Bundle savedInstanceState        super onCreate savedInstanceState       setContentView R layout activity main       next    Button  findViewById R id next       next setOnClickListener new View OnClickListener               Override         public void onClick View view                 startActivityForResult new Intent FirstActivity this  SecondActivity class   EXIT CODE                         Override protected void onActivityResult int requestCode  int resultCode  Intent data        if  requestCode    EXIT CODE            if  resultCode    RESULT OK                if  data getBooleanExtra  EXIT   true                     finish

User · Answer

I would implement a dialog asking the user if they wanted to exit and then call super onBackPressed   if they did    Override public void onBackPressed         new AlertDialog Builder this           setTitle  Really Exit             setMessage  Are you sure you want to exit             setNegativeButton android R string no  null           setPositiveButton android R string yes  new OnClickListener                  public void onClick DialogInterface arg0  int arg1                    WelcomeActivity super onBackPressed                             create   show        In the above example  you ll need to replace WelcomeActivity with the name of your activity

User · Answer

This is the best way  because if user not back more than two seconds then reset backpressed value       declare one global variable     private boolean backPressToExit   false       Override onBackPressed Method     Override public void onBackPressed          if  backPressToExit            super onBackPressed            return            this backPressToExit   true      Snackbar make findViewById R id yourview   getString R string exit msg   Snackbar LENGTH SHORT  show        new Handler   postDelayed new Runnable               Override         public void run                 backPressToExit   false                   2000

User · Answer

You can also use onBackPressed by following ways using customized Toast   enter image description here  customized toast xml   lt  xml version  1 0  encoding  utf-8   gt   lt TextView     xmlns android  http   schemas android com apk res android      android id    id txtMessage      android layout width  wrap content      android layout height  wrap content      android drawableStart   drawable ic white exit small      android drawableLeft   drawable ic white exit small      android drawablePadding  8dp      android paddingTop  8dp      android paddingBottom  8dp      android paddingLeft  16dp      android paddingRight  16dp      android gravity  center      android textColor   android color white      android textSize  16sp      android text  Press BACK again to exit        android background   drawable curve edittext   gt    MainActivity java   Override public void onBackPressed          if  doubleBackToExitPressedOnce            android os Process killProcess Process myPid             System exit 1           return             this doubleBackToExitPressedOnce   true      Toast toast   new Toast Dashboard this       View view   getLayoutInflater   inflate R layout toast view null       toast setView view       toast setDuration Toast LENGTH SHORT       int margin   getResources   getDimensionPixelSize R dimen toast vertical margin       toast setGravity Gravity BOTTOM   Gravity CENTER VERTICAL  0  margin       toast show         new Handler   postDelayed new Runnable               Override         public void run                 doubleBackToExitPressedOnce false                   2000

User · Answer

You may also need to reset counter in onPause to prevent cases when user presses home or navigates away by some other means after first back press  Otherwise  I don t see an issue

User · Answer

I just had this issue and solved it by adding the following method    Override public boolean onOptionsItemSelected MenuItem item        switch  item getItemId              case android R id home                  click on  up  button in the action bar  handle it here              return true           default              return super onOptionsItemSelected item

User · Answer

additionally  you need to dissmis dialog before calling activity super onBackPressed    otherwise you ll get  Activity has leaked    error    Example in my case with sweetalerdialog library     Override     public void onBackPressed               super onBackPressed            SweetAlertDialog progressDialog   new SweetAlertDialog this  SweetAlertDialog WARNING TYPE           progressDialog setCancelable false           progressDialog setTitleText  Are you sure you want to exit             progressDialog setCancelText  No            progressDialog setConfirmText  Yes            progressDialog setCanceledOnTouchOutside true           progressDialog setConfirmClickListener new SweetAlertDialog OnSweetClickListener                  Override             public void onClick SweetAlertDialog sweetAlertDialog                    sweetAlertDialog dismiss                    MainActivity super onBackPressed                                      progressDialog show

User · Answer

Use this  it may help    Override public void onBackPressed         new AlertDialog Builder this               setTitle  Message                setMessage  Do you want to exit app                 setNegativeButton  NO   null               setPositiveButton  YES   new DialogInterface OnClickListener                      Override                 public void onClick DialogInterface dialogInterface  int i                        UserLogin super onBackPressed                                     create   show

User · Answer

You don t need a counter for back presses   Just store a reference to the toast that is shown   private Toast backtoast   Then   public void onBackPressed         if USER IS GOING TO EXIT            if backtoast  null amp  amp backtoast getView   getWindowToken    null                finish              else               backtoast   Toast makeText this   Press back to exit   Toast LENGTH SHORT               backtoast show                    else             other stuff            super onBackPressed              This will call finish   if you press back while the toast is still visible  and only if the back press would result in exiting the application

[android] Android: Proper Way to use onBackPressed() with Toast

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