android - CollapsingToolbarLayout 箭头颜色

Question

我在我的 Activity 中使用了 CollapsingToolbarLayout，但是当它展开时我需要改变后退箭头的颜色，有什么办法可以做到这一点吗？ 我有什么:

我想做的事情:

这是我的布局，我在其中放置了“...”，其中包含带有 NestedScrollView 的布局。

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true"
    tools:context="com.primebitstudio.swiper.AboutCouponActivity"
    android:layout_marginTop="-1px">

    <android.support.design.widget.AppBarLayout android:id="@+id/app_bar"
        android:fitsSystemWindows="true"
        android:layout_height="wrap_content"
        android:layout_width="match_parent"
        android:theme="@style/AppTheme.AppBarOverlay">

        <android.support.design.widget.CollapsingToolbarLayout android:id="@+id/toolbar_layout"
            android:fitsSystemWindows="true"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            app:layout_scrollFlags="scroll|exitUntilCollapsed"
            app:contentScrim="?attr/colorPrimary"
            app:expandedTitleTextAppearance="@style/CollapsingToolbarLayoutExpandedTextStyle"
            app:theme="@style/ThemeOverlay.AppCompat.Light"
            app:popupTheme="@style/ToolBarStyle">

            <RelativeLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="-24dp">
                <ImageView
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:adjustViewBounds="true"
                    android:scaleType="fitCenter"
                    android:src="@drawable/test_image"
                    android:id="@+id/image"/>
            </RelativeLayout>

            <android.support.v7.widget.Toolbar android:id="@+id/toolbar"
                android:layout_height="?attr/actionBarSize"
                android:layout_width="match_parent"
                app:layout_collapseMode="pin"
                app:popupTheme="@style/ToolBarStyle" />

        </android.support.design.widget.CollapsingToolbarLayout>
    </android.support.design.widget.AppBarLayout>
...
...
</android.support.design.widget.CoordinatorLayout>

Answer 1

下面是我如何在展开和折叠布局时更改抽屉和选项图标颜色的示例:

protected void onCreate(Bundle savedInstanceState) {
            AppBarLayout appBarLayout = (AppBarLayout) findViewById(R.id.app_bar_layout);
            appBarLayout.addOnOffsetChangedListener(new AppBarLayout.OnOffsetChangedListener() {
                @Override
                public void onOffsetChanged(AppBarLayout appBarLayout, int offset)
                {
                    Drawable upArrow = ResourcesCompat.getDrawable(getResources(), R.drawable.drawer_icon, null);
                    if (offset < -200)
                    {
                        upArrow.setColorFilter(Color.parseColor("#000000"), PorterDuff.Mode.SRC_ATOP);
                        getSupportActionBar().setHomeAsUpIndicator(upArrow);

                        Drawable drawable = ContextCompat.getDrawable(getApplicationContext(),R.drawable.option_menu_icon);
                        drawable.setColorFilter(Color.parseColor("#000000"), PorterDuff.Mode.SRC_ATOP);
                        toolbar.setOverflowIcon(drawable);
                    }
                    else
                    {

                        upArrow.setColorFilter(Color.parseColor("#ffffff"), PorterDuff.Mode.SRC_ATOP);
                        getSupportActionBar().setHomeAsUpIndicator(upArrow);
                        getSupportActionBar().setDisplayHomeAsUpEnabled(true);

                        Drawable drawable = ContextCompat.getDrawable(getApplicationContext(),R.drawable.option_menu_icon);
                        drawable.setColorFilter(Color.parseColor("#ffffff"), PorterDuff.Mode.SRC_ATOP);
                        toolbar.setOverflowIcon(drawable);
                    }
        }
});