FixedSwitchPreference

FixedSwitchPreference.java

public class FixedSwitchPreference extends SwitchPreference {

    /**
     * Construct a new SwitchPreference with the given style options.
     *
     * @param context  The Context that will style this preference
     * @param attrs    Style attributes that differ from the default
     * @param defStyle Theme attribute defining the default style options
     */
    public FixedSwitchPreference(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    /**
     * Construct a new SwitchPreference with the given style options.
     *
     * @param context The Context that will style this preference
     * @param attrs   Style attributes that differ from the default
     */
    public FixedSwitchPreference(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    /**
     * Construct a new SwitchPreference with default style options.
     *
     * @param context The Context that will style this preference
     */
    public FixedSwitchPreference(Context context) {
        super(context, null);
    }

    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
    public FixedSwitchPreference(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
        super(context, attrs, defStyleAttr, defStyleRes);
    }

    private boolean value;

    @InjectView(android.R.id.switchInputMethod)
    CompoundButton widget;

    @Override
    protected void onBindView(View view) {
        ButterKnife.inject(this, view);
        if (widget == null) return; // no custom widget provided
        // Clean listener before invoke SwitchPreference.onBindView
        ViewGroup viewGroup = (ViewGroup) view;
        clearListenerInViewGroup(viewGroup);
        super.onBindView(view);
        // Set initial value and main check-listener
        widget.setChecked(value);
        widget.setOnCheckedChangeListener((buttonView, isChecked) -> {
                setChecked(isChecked);
            }
        );
    }

    @Override
    public void setChecked(boolean checked) {
        super.setChecked(checked);
        value = checked;
    }

    /**
     * Clear listener in Switch for specify ViewGroup.
     *
     * @param viewGroup The ViewGroup that will need to clear the listener.
     */
    private void clearListenerInViewGroup(ViewGroup viewGroup) {
        if (null == viewGroup) {
            return;
        }

        int count = viewGroup.getChildCount();
        for (int n = 0; n < count; ++n) {
            View childView = viewGroup.getChildAt(n);
            if (childView instanceof CompoundButton) {
                final CompoundButton switchView = (CompoundButton) childView;
                switchView.setOnCheckedChangeListener(null);
                return;
            } else if (childView instanceof ViewGroup) {
                ViewGroup childGroup = (ViewGroup) childView;
                clearListenerInViewGroup(childGroup);
            }
        }
    }

}

preference_switch.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.SwitchCompat
    android:id="@android:id/switchInputMethod"
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:background="@null"
    android:clickable="true"
    android:focusable="false"
    />

preferences_example.xml

<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
  <com.threewaytalk.android.ui.widget.FixedSwitchPreference
    android:key="switch_key"
    android:title="Try me"
    android:summary="I'm working"
    android:defaultValue="true"
    android:widgetLayout="@layout/preference_switch" />
</PreferenceScreen>