Android checkbox listener

Question

I want to put a Listener over a CheckBox  I looked for info and it is like this   satView    CheckBox findViewById R id sateliteCheckBox    satView setOnCheckedChangeListener new OnCheckedChangeListener          Override     public void onCheckedChanged RadioGroup group  int checkedId            if  isChecked                  perform logic                        The problem is that Eclipse thinks it s an OnCheckedChangeListener for a RadioGroup and it doesn t work  How can I fix this

User · Answer

If you are looking to do this in Kotlin with the interface implementation   class MainActivity  AppCompatActivity   CompoundButton OnCheckedChangeListener    override fun onCreate savedInstanceState  Bundle             super onCreate savedInstanceState          setContentView R layout activity main         val yourCheckBox   findViewById lt CheckBox gt  R id check box        yourCheckBox setOnCheckedChangeListener this           override fun onCheckedChanged buttonView  CompoundButton   isChecked  Boolean            when buttonView  id               R id check box - gt  Log d  Checked      isChecked

User · Answer

try this   satView setOnCheckedChangeListener new android widget CompoundButton OnCheckedChangeListener OnCheckedChangeListener              Override         public void onCheckedChanged RadioGroup group  int checkedId                if  isChecked                      perform logic

User · Answer

h chk setOnClickListener new View OnClickListener          Override     public void onClick View view                CheckBox chk  CheckBox view     important line and code work         if chk isChecked                          Message message a  Clicked at  position                     else                       Message message a  UnClick

User · Answer

You could use this code   public class MySampleActivity extends Activity       CheckBox cb1  cb2  cb3  cb4      LinearLayout l1  l2  l3  l4        Override     protected void onCreate Bundle savedInstanceState            super onCreate savedInstanceState           cb1    CheckBox  findViewById R id cb1           cb2    CheckBox  findViewById R id cb2           cb3    CheckBox  findViewById R id cb3           cb4    CheckBox  findViewById R id cb4           l1    LinearLayout  findViewById R id l1           l2    LinearLayout  findViewById R id l2           l3    LinearLayout  findViewById R id l3           l4    LinearLayout  findViewById R id l4               Override     protected void onPostCreate Bundle savedInstanceState            super onPostCreate savedInstanceState           cb1 setOnCheckedChangeListener new MyCheckedChangeListener 1            cb1 setOnCheckedChangeListener new MyCheckedChangeListener 2            cb1 setOnCheckedChangeListener new MyCheckedChangeListener 3            cb1 setOnCheckedChangeListener new MyCheckedChangeListener 4               public class MyCheckedChangeListener implements CompoundButton OnCheckedChangeListener           int position           public MyCheckedChangeListener int position                this position   position                     private void changeVisibility LinearLayout layout  boolean isChecked                if  isChecked                    l1 setVisibility View VISIBLE                 else                   l1 setVisibility View GONE                                      Override         public void onCheckedChanged CompoundButton buttonView  boolean isChecked                switch  position                    case 1                      changeVisibility l1  isChecked                       break                  case 2                      changeVisibility l2  isChecked                       break                  case 3                      changeVisibility l3  isChecked                       break                  case 4                      changeVisibility l4  isChecked                       break

User · Answer

Translation of the accepted answer by Chris into Kotlin  val checkBox  CheckBox   findViewById R id chk  checkBox setOnCheckedChangeListener   buttonView  isChecked - gt         Code here

User · Answer

You can do this   satView setOnCheckedChangeListener new CompoundButton OnCheckedChangeListener              Override        public void onCheckedChanged CompoundButton buttonView boolean isChecked

User · Answer

Change RadioGroup group with CompoundButton buttonView and then press Ctrl Shift O to fix your imports

User · Answer

You get the error because you imported wrong package You should import android widget CompoundButton OnCheckedChangeListener   So the callback should be            box setOnCheckedChangeListener new OnCheckedChangeListener               Override         public void onCheckedChanged CompoundButton buttonView  boolean isChecked                   TODO Auto-generated method stub

User · Answer

Try this   satView    CheckBox  findViewById R id sateliteCheckBox    satView setOnCheckedChangeListener new OnCheckedChangeListener          Override      public void onCheckedChanged CompoundButton buttonView  boolean isChecked              if  buttonView isChecked                          checked                        else                                 not checked                          Hope this helps

User · Answer

you may also go for a simple View OnClickListener   satView setOnClickListener new View OnClickListener          Override     public void onClick View view            if   CompoundButton  view  isChecked                 System out println  Checked              else               System out println  Un-Checked

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