app/src/main/java/me/zhanghai/android/douya/ui/AppBarWrapperLayout.java

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/*
 * Copyright (c) 2015 Zhang Hai <Dreaming.in.Code.ZH@Gmail.com>
 * All Rights Reserved.
 */

package me.zhanghai.android.douya.ui;

import android.animation.AnimatorSet;
import android.animation.ObjectAnimator;
import android.annotation.TargetApi;
import android.content.Context;
import android.os.Build;
import android.os.Parcel;
import android.os.Parcelable;
import android.support.v4.view.animation.FastOutLinearInInterpolator;
import android.support.v4.view.animation.FastOutSlowInInterpolator;
import android.util.AttributeSet;
import android.view.View;
import android.widget.LinearLayout;

import butterknife.BindInt;
import butterknife.ButterKnife;
import me.zhanghai.android.douya.R;
import me.zhanghai.android.douya.util.ViewUtils;

/**
 * A {@link LinearLayout} that manages showing and hiding the AppBar and its shadow with support.
 */
public class AppBarWrapperLayout extends LinearLayout {

    @BindInt(android.R.integer.config_shortAnimTime)
    int mAnimationDuration;

    private View mAppbarView;
    private View mShadowCompatView;

    private boolean mShowing = true;
    private AnimatorSet mAnimator;

    public AppBarWrapperLayout(Context context) {
        super(context);

        init();
    }

    public AppBarWrapperLayout(Context context, AttributeSet attrs) {
        super(context, attrs);

        init();
    }

    public AppBarWrapperLayout(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);

        init();
    }

    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
    public AppBarWrapperLayout(Context context, AttributeSet attrs, int defStyleAttr,
                               int defStyleRes) {