Toggle visibility helper class

ToggleVisibilityHelper.java

import android.os.Handler;

/**
 * A helper class can toggle target object visibility automatically.
 * It is very useful for MediaController (or ActionBar) when play video in Activity.
 */
public abstract class ToggleVisibilityHelper {

    /**
     * Record the time while user lasted click.
     */
    private long mToggleTime = 0L;

    public void toggleVisibility() {
        mToggleTime = System.currentTimeMillis();

        if (isVisible()) {
            hide();
        } else {
            show();
            hideDelay();
        }
    }

    /**
     * A callback whether target object is visible currently.
     *
     * @return
     */
    protected abstract boolean isVisible();

    /**
     * Whether the target object is still in playing state.
     *
     * @return
     */
    protected boolean isPlaying() {
        //The default value is true.
        return true;
    }

    protected abstract void hide();

    protected abstract void show();

    protected void hideDelay() {
        new Handler().postDelayed(new Runnable() {

            @Override
            public void run() {
                if (System.currentTimeMillis() - mToggleTime < 3000L || !isPlaying()) {
                    return;
                }
                if (isVisible()) {
                    hide();
                }
            }
        }, 3500);
    }
}