Android How do I correctly get the value from a Switch?

Question

I'm creating a Android application which uses a Switch.
I'm trying to listen for changes and get the value when changed.
I have two questions when using switches:

What action listener do I use?
How do I get the the switch value?

I think he must either mean a `ToggleButton` or a `Checkbox`, but the tag `switch-statement` is confusing me, since he may be referring to a `switch(int v){}` for some reason — Juan Cortés, May 14 '12 at 00:41
@stackoverflow i think it is best answer and show accept as a answer https://stackoverflow.com/a/49600494/8079868 — Muhammad Numan, Mar 18 '21 at 08:59

score 102 · Accepted Answer · edited Dec 21 '18 at 08:36

Switch s = (Switch) findViewById(R.id.SwitchID);

if (s != null) {
    s.setOnCheckedChangeListener(this);
}

/* ... */

public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
    Toast.makeText(this, "The Switch is " + (isChecked ? "on" : "off"),
                   Toast.LENGTH_SHORT).show();
    if(isChecked) {
        //do stuff when Switch is ON
    } else {
        //do stuff when Switch if OFF
    }
}

Hint: isChecked is the new switch value [true or false] not the old one.

score 61 · Answer 2 · answered May 14 '12 at 00:49

61

Since it extends from CompoundButton (docs), you can use setOnCheckedChangeListener() to listen for changes; use isChecked() to get the current state of the button.

answered May 14 '12 at 00:49

dmon

30,048
8
87
96

score 12 · Answer 3 · answered Apr 01 '18 at 17:03

Switch switch = (Switch) findViewById(R.id.Switch2);

switch.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
                public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                    if (isChecked) {
                        ...switch on..
                    } else {
                       ...switch off..
                    }
                }
            });

i hope this will solve your problem

It is nice but avoid to use java reserved keyword (switch) as variable name. — Uglylab, Dec 02 '22 at 07:45

score 2 · Answer 4 · answered Jan 25 '20 at 15:27

2

I added this in kotlin

switchImage.setOnCheckedChangeListener { compoundButton: CompoundButton, b: Boolean ->
    if (b) // Do something
    else // Do something
}

answered Jan 25 '20 at 15:27

hiashutoshsingh

980
2
14
41

score 0 · Answer 5 · answered Jul 24 '20 at 11:57

Kotlin but in More readable Java Style

   videoLoopSwitch.setOnCheckedChangeListener(object : CompoundButton.OnCheckedChangeListener{
                override fun onCheckedChanged(switch: CompoundButton?, isChecked: Boolean) {
                    videoPlayer?.apply {
                        setLooping(isChecked)
                    }
                }
            })

score 0 · Answer 6 · answered Sep 02 '22 at 16:52

Try This one

@OnClick({R.id.sw_auto_reload})
void onChangedAutoReload(){
    Switch s = (Switch) findViewById(R.id.sw_auto_reload);
    if (s != null) {
        s.setOnCheckedChangeListener(this);
        s.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
                paymentSettingsPresenter.onAutoReload(b);
            }
        });
    }
}

Android How do I correctly get the value from a Switch?

6 Answers6

Kotlin but in More readable Java Style

Linked