Display back button on action bar

Question

I m trying to display a Back button on the Action bar to move previous page activity or to the main page  first opening   And I can not do it   my code   ActionBar actionBar   getActionBar    actionBar setHomeButtonEnabled true     the code is in onCreate

User · Answer

public void initToolbar             this set back button         getSupportActionBar   setDisplayHomeAsUpEnabled true            this is set custom image to back button        getSupportActionBar   setHomeAsUpIndicator R drawable back btn image         this method call when you press back button  Override public boolean onSupportNavigateUp        finish        return true

User · Answer

Try this  In your onCreate     getActionBar   setHomeButtonEnabled true    getActionBar   setDisplayHomeAsUpEnabled true     And for clickevent    Override     public boolean onOptionsItemSelected MenuItem item            switch  item getItemId                  case android R id home                     app icon in action bar clicked  goto parent activity                  this finish                    return true              default                  return super onOptionsItemSelected item

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In my case  I just had to add android parentActivityName attr to my activity like this   lt activity  android name  quot  AboutActivity quot   android label  quot  string title activity about quot   android parentActivityName  quot  MainActivity quot    gt   and the back button appears and works as expected

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I know I m a bit late  but was able to fix this issue by following the docs directly  Add the meta-data tag to AndroidManifest xml  so the system knows    lt activity         android name  quot  Sub quot          android label  quot Sub-Activity quot          android parentActivityName  quot  MainChooser quot          android theme  quot  style AppTheme NoActionBar quot  gt       lt meta-data         android name  quot android support PARENT ACTIVITY quot          android value  quot  MainChooser quot    gt       lt  activity gt   Next  enable the back  up  button in your MainActivity      Override      protected void onCreate Bundle savedInstanceState        super onCreate savedInstanceState       setContentView R layout activity my child            my child toolbar is defined in the layout file      Toolbar myChildToolbar            Toolbar  findViewById R id my child toolbar       setSupportActionBar myChildToolbar            Get a support ActionBar corresponding to this toolbar      ActionBar ab   getSupportActionBar             Enable the Up button      ab setDisplayHomeAsUpEnabled true           And  you will be all set up  Source  Android Developer Documentation

User · Answer

Manifest xml   lt activity             android name   Activity SecondActivity              android label  Second Activity              android parentActivityName   Activity MainActivity              android screenOrientation  portrait  gt  lt  activity gt

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I Solved in this way    Override public boolean  onOptionsItemSelected MenuItem item       switch  item getItemId              case android R id home              onBackPressed                finish                return true          default              return super onOptionsItemSelected item             Override public void onBackPressed        Intent backMainTest   new Intent this MainTest class       startActivity backMainTest       finish

User · Answer

I think onSupportNavigateUp   is the best and Easiest way to do so  check the below steps  Step 1 is necessary  step two have alternative  Step 1 showing back button  Add this line in onCreate   method to show back button  assert getSupportActionBar      null      null check getSupportActionBar   setDisplayHomeAsUpEnabled true       show back button  Step 2 implementation of back click  Override this method  Override public boolean onSupportNavigateUp           finish          return true       thats it  you are done OR Step 2 Alternative  You can add meta to the activity in manifest file as  lt meta-data         android name  quot android support PARENT ACTIVITY quot          android value  quot MainActivity quot    gt   Edit  If you are not using AppCompat Activity then do not use support word  you can use getActionBar   setDisplayHomeAsUpEnabled true      In  OnCreate         And override this method  Override  public boolean onNavigateUp           finish          return true      Thanks to  atariguy for comment

User · Answer

To achieve this  there are simply two steps   Step 1  Go to AndroidManifest xml and add this parameter in the  lt activity gt  tag - android parentActivityName   home HomeActivity   Example    lt activity     android name   home ActivityDetail      android parentActivityName   home HomeActivity      android screenOrientation  portrait    gt    Step 2  In ActivityDetail add your action for previous page activity  Example    Override public boolean onOptionsItemSelected MenuItem item        switch  item getItemId              case android R id home              onBackPressed                return true            return super onOptionsItemSelected item

User · Answer

On your onCreate method add   getSupportActionBar   setDisplayHomeAsUpEnabled true     While defining in the AndroidManifest xml the parent activity  the activity that will be called once the back button in the action bar is pressed    In your  lt activity gt  definition on the Manifest  add the line   android parentActivityName  com example activities MyParentActivity

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in onCreate method write-  Toolbar toolbar   findViewById R id tool       setSupportActionBar toolbar       if  getSupportActionBar      null            getSupportActionBar   setDisplayHomeAsUpEnabled true           getSupportActionBar   setDisplayShowHomeEnabled true            Override public boolean onSupportNavigateUp         onBackPressed        return true     Override public void onBackPressed         super onBackPressed        startActivity new Intent ActivityOne this  ActivityTwo class        finish        and this is the xml file-   lt android support v7 widget Toolbar xmlns android  http   schemas android com apk res android  android layout width  match parent  android layout height   attr actionBarSize  android background   color colorPrimary  android theme   style ThemeOverlay AppCompat Dark  android id    id tool  gt    and in styles xml change it to  Theme AppCompat Light NoActionBar   this is all what we have to do

User · Answer

In your onCreate   method add this line   getSupportActionBar   setDisplayHomeAsUpEnabled true     and  in the same Activity  add this method to handle the button click   Override public boolean onOptionsItemSelected MenuItem item        if  item getItemId      android R id home            this finish            return true            return super onOptionsItemSelected item

User · Answer

well this is simple one to show back button  actionBar setDisplayHomeAsUpEnabled true     and then you can custom the back event at onOptionsItemSelected  case android R id home  this finish    return true

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The magic happens in onOptionsItemSelected    Override public boolean onOptionsItemSelected MenuItem item        switch  item getItemId              case android R id home                 app icon in action bar clicked  go home             Intent intent   new Intent this  HomeActivity class               intent addFlags Intent FLAG ACTIVITY CLEAR TOP               startActivity intent               return true          default              return super onOptionsItemSelected item

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In updated version getActionBar   does not work   Instead  you can do this by this way  protected void onCreate Bundle savedInstanceState            super onCreate savedInstanceState           setContentView R layout activity main           ActionBar actionBar   getSupportActionBar            actionBar setDisplayHomeAsUpEnabled true           add back button in android title bar this helps you in 2020

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In Order to display action bar back button in Kotlin there are 2 way to implement it  1  using the default Action Bar provided by Android     - Your activity must use a theme that has Action Bar     - eg  Theme AppCompat Light DarkActionBar  override fun onCreate savedInstanceState  Bundle         super onCreate savedInstanceState      val actionBar   supportActionBar     actionBar   title    your title      actionBar setDisplayHomeAsUpEnabled true        actionBar setDisplayHomeAsUpEnabled true     override fun onSupportNavigateUp    Boolean       onBackPressed       return true     2  Design your own Action Bar    - disable default Action Bar    - eg  Theme AppCompat Light NoActionBar    - add layout to your activity xml       lt androidx appcompat widget Toolbar      android id    id main toolbar       android layout width  match parent       app layout constraintEnd toEndOf  parent       app layout constraintStart toStartOf  parent       app layout constraintTop toTopOf  parent  gt         lt androidx constraintlayout widget ConstraintLayout          android layout width  match parent           android layout height  match parent           tools layout editor absoluteX  16dp  gt             lt TextView              android id    id main toolbar title               android layout width  wrap content               android layout height  wrap content               android text  Your Title               android textSize  25sp               app layout constraintBottom toBottomOf  parent               app layout constraintEnd toEndOf  parent               app layout constraintHorizontal bias  0 5               app layout constraintStart toStartOf  parent               app layout constraintTop toTopOf  parent    gt         lt  androidx constraintlayout widget ConstraintLayout gt    lt  androidx appcompat widget Toolbar gt      onCreate   override fun onCreate savedInstanceState  Bundle          super onCreate savedInstanceState        setSupportActionBar findViewById R id main toolbar         create your own button    lt  xml version  1 0  encoding  utf-8   gt   lt menu  xmlns android  http   schemas android com apk res android   xmlns app  http   schemas android com apk res-auto   gt     lt item      android id    id main action toolbar       android icon   drawable ic main toolbar item       android title  find       android layout width  80dp       android layout height  35dp       app actionLayout   layout toolbar item       app showAsAction  always   gt    lt  menu gt     in YourActivity kt   override fun onCreateOptionsMenu menu  Menu    Boolean        menuInflater inflate R menu main toolbar item  menu        leftToolbarItems   menu   findItem R id main action toolbar       val actionView   leftToolbarItems actionView      val badgeTextView   actionView findViewById lt TextView gt  R id main action toolbar badge       badgeTextView visibility   View GONE       actionView setOnClickListener            println  click on tool bar               return super onCreateOptionsMenu menu

User · Answer

This is simple and works for me very well  add this inside onCreate   method  getSupportActionBar   setHomeButtonEnabled true   getSupportActionBar   setDisplayHomeAsUpEnabled true     add this outside oncreate   method   Override public boolean onOptionsItemSelected MenuItem item        onBackPressed        return true

User · Answer

In oncreate    write this line-    getSupportActionBar   setDisplayHomeAsUpEnabled true         then implement below method in that class    Override public boolean onOptionsItemSelected MenuItem item    switch  item getItemId          case android R id home             app icon in action bar clicked  go home       onBackPressed            return true      default          return super onOptionsItemSelected item

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I know that the above are many helpful solutions  but this time I read this article  current Android Studio 2 1 2 with sdk 23  some method above doesn t work   Below is my solution for sub-activity is MapsActivity  First  you need to add parentActivity in      AndroidManifest xml   like this     lt application      gt               lt  -- Main activity  which has no parent activity  -- gt       lt activity         android name  com example myapp MainActivity      gt                   lt  activity gt       lt  -- A child of the main activity -- gt       lt activity                       android parentActivityName   MainActivity   gt           lt  -- Support Parent activity for Android 4 0 and lower -- gt           lt meta-data             android name  android support PARENT ACTIVITY              android value  com example myapp MainActivity    gt       lt  activity gt   lt  application gt    Second  ensure that your sub-Activity extends AppCompatActivity  not  FragmentActivity   Third  override onOptionsItemSelected   method   Override     public boolean onOptionsItemSelected MenuItem item            switch  item getItemId                  case android R id home                     app icon action bar is clicked  go to parent activity                 this finish                    return true              case R id action settings                  return true              default                  return super onOptionsItemSelected item                     Hope this will help

User · Answer

Official solution  Add those two code snippets to your SubActivity   Override public void onCreate Bundle savedInstanceState                getActionBar   setDisplayHomeAsUpEnabled true       Override public boolean onOptionsItemSelected MenuItem item        switch  item getItemId             Respond to the action bar s Up Home button     case android R id home          NavUtils navigateUpFromSameTask this           return true            return super onOptionsItemSelected item       add meta-data and parentActivity to manifest to support lower sdk     lt application      gt               lt  -- The main home activity  it has no parent activity  -- gt       lt activity         android name  com example myfirstapp MainActivity      gt                   lt  activity gt       lt  -- A child of the main activity -- gt       lt activity         android name  com example myfirstapp SubActivity          android label   string title activity display message          android parentActivityName  com example myfirstapp MainActivity   gt           lt  -- Parent activity meta-data to support 4 0 and lower -- gt           lt meta-data             android name  android support PARENT ACTIVITY              android value  com example myfirstapp MainActivity    gt       lt  activity gt   lt  application gt    Reference here http   developer android com training implementing-navigation ancestral html

User · Answer

Add below code in the onCreate function   getSupportActionBar   setDisplayHomeAsUpEnabled true    And then override       Override         public boolean onOptionsItemSelected MenuItem item               onBackPressed                return true

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my working code to go back screen    Override public boolean onOptionsItemSelected MenuItem item         switch  item getItemId           case android R id home           Toast makeText getApplicationContext     Home Clicked                   Toast LENGTH LONG  show                go to previous activity         onBackPressed             return true              return super onOptionsItemSelected item

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It could be too late to answer but I have a shorter and more functional solution in my opinion      Inside your onCreate method  add these  ActionBar actionBar   getSupportActionBar    actionBar setHomeButtonEnabled true   actionBar setDisplayHomeAsUpEnabled true       After the method s closing bracket  add the following method exactly as it is and voiulla  a fully functional back arrow appears at the action bar  Override public boolean onOptionsItemSelected MenuItem item        onBackPressed        return true

User · Answer

ActionBar actionBar getActionBar     actionBar setDisplayHomeAsUpEnabled true     Override public boolean onOptionsItemSelected MenuItem item             switch  item getItemId              case android R id home               onBackPressed                return true                 return super onOptionsItemSelected item

User · Answer

Try this code  considers it only if you need the back button    Override protected void onCreate Bundle savedInstanceState        super onCreate savedInstanceState         YOUR CODE     getSupportActionBar   setDisplayHomeAsUpEnabled true          YOUR CODE     Override public boolean onOptionsItemSelected MenuItem item        onBackPressed        return true

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Add these lines to onCreate    android support v7 app ActionBar actionBar   getSupportActionBar       actionBar setHomeButtonEnabled true      actionBar setDisplayHomeAsUpEnabled true     and in onOptionItemSelected   Override     public boolean onOptionsItemSelected MenuItem item            switch  item getItemId                  case android R id home                    Write your logic here                 this finish                    return true              default                  return super onOptionsItemSelected item                     Hope this will help you

[android] Display back button on action bar

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