When adding radio buttons programmatically, we need to always reset to a known empty state. Rather than make all clients check if the RadioGroup has buttons this allows the removeAllButtons() to be a no-opp.

backfill tests.

the icon launcher from the multilineradiogroup was replace the icon_launcher from project, so ai create the new icon launcher and changed name new icon , but i get error like bellow . please help.

Error:Execution failed for task ':app:processDebugManifest'.

Manifest merger failed : Attribute application@icon value=(@mipmap/ic_launcher_psks) from AndroidManifest.xml:15:9-48 is also present at [com.github.Gavras:MultiLineRadioGroup:v1.0.0.4] AndroidManifest.xml:13:9-43 value=(@mipmap/ic_launcher). Suggestion: add 'tools:replace="android:icon"' to element at AndroidManifest.xml:13:5-49:19 to override.

with an interface method that is named the same as the parent class, the behaviour should be the same -- clicking the same radioButton should not emit a new 'onCheckChange' event since the check state did not change when the same radio button is clicked. Tests show this is the behavior of the base RadioGroup class.

While the listener interface is different, it has the same name as the base class. While this might be the object oriented design principle that is good to follow -- don't change behavior of a base method. There is a functional implication. Clients of the library that execute functionality upon check change would only expect/want that functionality to execute once -- when the radio gets checked.

I have created a radio group with more than 6 radio button how can I set checked the 3 rd radio button in this group SELECT and DESELECT ( setchecked = true, setchecked = false) in programmatically?

The current implementation of onRestoreInstanceState causes the following exception. By checking the type of the saved state we avoid this problem and use the superState when necessary. I loosely followed the example from Tricky Android keeping the if condition you started with (as I've done on other custom controls)

Wrong state class, expecting View State but received class com.whygraphics.multilineradiogroup.MultiLineRadioGroup$SavedState instead. This usually happens when two views of different type have the same id in the same hierarchy. This view's id is NO_ID. Make sure other views do not use the same id

Hello ,, I Think this peace of code

public void checkAt(int index) {
    if(index >= 0 && index < this.mRadioButtons.size()) {
        this.checkButton((RadioButton)this.mRadioButtons.get(index));
    }
}

private void checkButton(RadioButton button) {
    if(button != null) {
        if(button != this.mCheckedButton) {
            if(this.mCheckedButton != null) {
                this.mCheckedButton.setChecked(false);
            }

            button.setChecked(true);
            this.mCheckedButton = button;
        }

    }
}

not called "mOnCheckedChangeListener" i think after define 'mCheckedButton' just call 'button.performClick();' this will call the listener. to be like that -->

public void checkAt(int index) {
    if(index >= 0 && index < this.mRadioButtons.size()) {
        this.checkButton((RadioButton)this.mRadioButtons.get(index));
    }
}

private void checkButton(RadioButton button) {
    if(button != null) {
        if(button != this.mCheckedButton) {
            if(this.mCheckedButton != null) {
                this.mCheckedButton.setChecked(false);
            }

            button.setChecked(true);
            this.mCheckedButton = button;
            button.performClick();
        }

    }
}

i hope updating this peace of code. Thanks ,,,, @Gavras