Android Development: Checkbox setChecked not working

Question

In my xml:

<CheckBox android:id="@+id/checkboxUpdateLessonPlanAll"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/chkLessonPlanAll"
            android:onClick="onCheckboxClicked"/>

In my java:

public void onCheckboxClicked(View view) {
    //CheckBox box = (CheckBox) view;
    CheckBox box = (CheckBox) findViewById(R.id.checkboxUpdateLessonPlanAll);
    box.setChecked(!box.isChecked());
    Log.v("qwerty", "checkbox clicked " + box.isChecked() + "!!");
}

I can see my log message in LogCat and it shows it as false when I click on the checkbox but its state doesn't change. It remains unchecked.

flx · Accepted Answer · 2013-11-18 05:16:38Z

10

Why would you try to overwrite the default behavior with something like the default behavior? The checkbox toggles automatically on every click.

If you want to react on that, use the OnCheckedChangeListener.

answered Nov 18, 2013 at 5:16

flx

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3 Comments

Rickkwa Over a year ago

So it does... I just copied the code from a tutorial and it came with the onClick =.= so I just went with it. But yeah, it can check now, thanks. But aside from that, do you know why it didn't work the way in the question?

flx Over a year ago

it's because you are toggling twice. once in your code, once in checkbox' code.

federico verchez Over a year ago

i made the same mistake as the op. now i know why code wasn't working. ha ha

Makalele · Accepted Answer · 2018-01-30 10:41:42Z

4

To Make CheckBox checked or unchecked you can also use like

box.setChecked(true);

box.setChecked(false);

and to get state of CheckBox

if(box.isChecked()) {

  //do something here...

} else {

  //do something here...

}

edited Jan 30, 2018 at 10:41

Makalele

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answered Nov 18, 2013 at 5:19

Ankitkumar Makwana

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Comments

Ductinesc · Accepted Answer · 2023-03-10 02:18:14Z

0

for MaterialCheckBox, use checkedState instead of setChecked.

setFalse:

checkbox.checkedState = STATE_UNCHECKED

setTrue:

checkbox.checkedState = STATE_CHECKED

answered Mar 10, 2023 at 2:18

Ductinesc

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