CheckableView.java

package com.jbirdvegas.mgerrit.objects;

import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Checkable;
import android.widget.RelativeLayout;

import java.util.ArrayList;
import java.util.List;

/*
 * Copyright (C) 2013 Android Open Kang Project (AOKP)
 *  Author: Evan Conway (P4R4N01D), 2013
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 * RelativeLayout that delegates checked events to its children
 *
 *  Source: https://github.com/marvinlabs/android-tutorials-custom-selectable-listview
 */
public class CheckableView extends RelativeLayout implements Checkable {

    private boolean mIsChecked = false;
    private final List<Checkable> checkableViews;

    public CheckableView(Context context, AttributeSet attrs) {
        super(context, attrs);
        this.mIsChecked = false;
        this.checkableViews = new ArrayList<>(5);
    }

    @Override
    public void setChecked(boolean isChecked) {
        this.mIsChecked = isChecked;
        for (Checkable c : checkableViews) {
            c.setChecked(isChecked);
        }
    }

    @Override
    public boolean isChecked() {
        return mIsChecked;
    }

    @Override
    public void toggle() {
        this.mIsChecked = !this.mIsChecked;
        for (Checkable c : checkableViews) {
            c.toggle();
        }
    }

    @Override
    public boolean performClick() {
        toggle();
        return super.performClick();
    }

    @Override
    protected void onFinishInflate() {
        super.onFinishInflate();

        final int childCount = this.getChildCount();
        for (int i = 0; i < childCount; ++i) {
            findCheckableChildren(this.getChildAt(i));
        }
    }

    /**
     * Add to our checkable list all the children of the view that implement the interface Checkable
     */
    private void findCheckableChildren(View v) {
        if (v instanceof Checkable) {
            this.checkableViews.add((Checkable) v);
        }

        if (v instanceof ViewGroup) {
            final ViewGroup vg = (ViewGroup) v;
            final int childCount = vg.getChildCount();
            for (int i = 0; i < childCount; ++i) {
                findCheckableChildren(vg.getChildAt(i));
            }
        }
    }
}