Android 静态工具栏图标

我正在开发一个Android-L-test-app，其中包含一些材料设计指南的功能。我正在尝试实现一个工具栏，在上面的图标是静态的

        <include layout="@layout/toolbar_actionbar" />

        <!-- Session title -->
        <TextView android:layout_height="wrap_content"
            android:layout_width="match_parent"
            android:layout_marginBottom="0dp"
            android:layout_marginLeft="@dimen/keyline_2_session_detail"
            android:layout_marginRight="@dimen/keyline_1"
            android:text="@string/placeholder_session_title"
            android:id="@+id/session_title"
            android:maxLines="4"
            android:ellipsize="end"
            android:textSize="@dimen/text_size_large"
            android:lineSpacingMultiplier="1.1"
            android:textStyle="@integer/font_textStyle_medium"
            android:fontFamily="@string/font_fontFamily_medium"
            android:textColor="@color/body_text_1_inverse" />
        <!--android:textAlignment="viewStart" -->


        <!-- Session subtitle -->
        <TextView android:layout_height="wrap_content"
            android:layout_width="match_parent"
            android:layout_marginLeft="@dimen/keyline_2_session_detail"
            android:layout_marginRight="@dimen/keyline_1"
            android:text="@string/placeholder_session_subtitle"
            android:id="@+id/session_subtitle"
            android:maxLines="2"
            android:ellipsize="end"
            android:textSize="16sp"
            android:textColor="@color/body_text_2_inverse" />
            <!--android:textAlignment="viewStart" -->

    </LinearLayout>

这是在谷歌IO 2014应用程序中完成的，我想复制它。我一直在看代码（），但我不知道他们是怎么做到的

        <include layout="@layout/toolbar_actionbar" />

        <!-- Session title -->
        <TextView android:layout_height="wrap_content"
            android:layout_width="match_parent"
            android:layout_marginBottom="0dp"
            android:layout_marginLeft="@dimen/keyline_2_session_detail"
            android:layout_marginRight="@dimen/keyline_1"
            android:text="@string/placeholder_session_title"
            android:id="@+id/session_title"
            android:maxLines="4"
            android:ellipsize="end"
            android:textSize="@dimen/text_size_large"
            android:lineSpacingMultiplier="1.1"
            android:textStyle="@integer/font_textStyle_medium"
            android:fontFamily="@string/font_fontFamily_medium"
            android:textColor="@color/body_text_1_inverse" />
        <!--android:textAlignment="viewStart" -->


        <!-- Session subtitle -->
        <TextView android:layout_height="wrap_content"
            android:layout_width="match_parent"
            android:layout_marginLeft="@dimen/keyline_2_session_detail"
            android:layout_marginRight="@dimen/keyline_1"
            android:text="@string/placeholder_session_subtitle"
            android:id="@+id/session_subtitle"
            android:maxLines="2"
            android:ellipsize="end"
            android:textSize="16sp"
            android:textColor="@color/body_text_2_inverse" />
            <!--android:textAlignment="viewStart" -->

    </LinearLayout>

下面是一个屏幕截图，可以直观地看到我的问题：

        <include layout="@layout/toolbar_actionbar" />

        <!-- Session title -->
        <TextView android:layout_height="wrap_content"
            android:layout_width="match_parent"
            android:layout_marginBottom="0dp"
            android:layout_marginLeft="@dimen/keyline_2_session_detail"
            android:layout_marginRight="@dimen/keyline_1"
            android:text="@string/placeholder_session_title"
            android:id="@+id/session_title"
            android:maxLines="4"
            android:ellipsize="end"
            android:textSize="@dimen/text_size_large"
            android:lineSpacingMultiplier="1.1"
            android:textStyle="@integer/font_textStyle_medium"
            android:fontFamily="@string/font_fontFamily_medium"
            android:textColor="@color/body_text_1_inverse" />
        <!--android:textAlignment="viewStart" -->


        <!-- Session subtitle -->
        <TextView android:layout_height="wrap_content"
            android:layout_width="match_parent"
            android:layout_marginLeft="@dimen/keyline_2_session_detail"
            android:layout_marginRight="@dimen/keyline_1"
            android:text="@string/placeholder_session_subtitle"
            android:id="@+id/session_subtitle"
            android:maxLines="2"
            android:ellipsize="end"
            android:textSize="16sp"
            android:textColor="@color/body_text_2_inverse" />
            <!--android:textAlignment="viewStart" -->

    </LinearLayout>

左侧：我实际情况的屏幕截图（菜单图标在标题中为硬图标，并随这些图标一起滚动） 右侧：这就是我想要的（“屏幕顶部的静态”图标）：

        <include layout="@layout/toolbar_actionbar" />

        <!-- Session title -->
        <TextView android:layout_height="wrap_content"
            android:layout_width="match_parent"
            android:layout_marginBottom="0dp"
            android:layout_marginLeft="@dimen/keyline_2_session_detail"
            android:layout_marginRight="@dimen/keyline_1"
            android:text="@string/placeholder_session_title"
            android:id="@+id/session_title"
            android:maxLines="4"
            android:ellipsize="end"
            android:textSize="@dimen/text_size_large"
            android:lineSpacingMultiplier="1.1"
            android:textStyle="@integer/font_textStyle_medium"
            android:fontFamily="@string/font_fontFamily_medium"
            android:textColor="@color/body_text_1_inverse" />
        <!--android:textAlignment="viewStart" -->


        <!-- Session subtitle -->
        <TextView android:layout_height="wrap_content"
            android:layout_width="match_parent"
            android:layout_marginLeft="@dimen/keyline_2_session_detail"
            android:layout_marginRight="@dimen/keyline_1"
            android:text="@string/placeholder_session_subtitle"
            android:id="@+id/session_subtitle"
            android:maxLines="2"
            android:ellipsize="end"
            android:textSize="16sp"
            android:textColor="@color/body_text_2_inverse" />
            <!--android:textAlignment="viewStart" -->

    </LinearLayout>

有什么想法吗

        <include layout="@layout/toolbar_actionbar" />

        <!-- Session title -->
        <TextView android:layout_height="wrap_content"
            android:layout_width="match_parent"
            android:layout_marginBottom="0dp"
            android:layout_marginLeft="@dimen/keyline_2_session_detail"
            android:layout_marginRight="@dimen/keyline_1"
            android:text="@string/placeholder_session_title"
            android:id="@+id/session_title"
            android:maxLines="4"
            android:ellipsize="end"
            android:textSize="@dimen/text_size_large"
            android:lineSpacingMultiplier="1.1"
            android:textStyle="@integer/font_textStyle_medium"
            android:fontFamily="@string/font_fontFamily_medium"
            android:textColor="@color/body_text_1_inverse" />
        <!--android:textAlignment="viewStart" -->


        <!-- Session subtitle -->
        <TextView android:layout_height="wrap_content"
            android:layout_width="match_parent"
            android:layout_marginLeft="@dimen/keyline_2_session_detail"
            android:layout_marginRight="@dimen/keyline_1"
            android:text="@string/placeholder_session_subtitle"
            android:id="@+id/session_subtitle"
            android:maxLines="2"
            android:ellipsize="end"
            android:textSize="16sp"
            android:textColor="@color/body_text_2_inverse" />
            <!--android:textAlignment="viewStart" -->

    </LinearLayout>

layout.xml：

        <include layout="@layout/toolbar_actionbar" />

        <!-- Session title -->
        <TextView android:layout_height="wrap_content"
            android:layout_width="match_parent"
            android:layout_marginBottom="0dp"
            android:layout_marginLeft="@dimen/keyline_2_session_detail"
            android:layout_marginRight="@dimen/keyline_1"
            android:text="@string/placeholder_session_title"
            android:id="@+id/session_title"
            android:maxLines="4"
            android:ellipsize="end"
            android:textSize="@dimen/text_size_large"
            android:lineSpacingMultiplier="1.1"
            android:textStyle="@integer/font_textStyle_medium"
            android:fontFamily="@string/font_fontFamily_medium"
            android:textColor="@color/body_text_1_inverse" />
        <!--android:textAlignment="viewStart" -->


        <!-- Session subtitle -->
        <TextView android:layout_height="wrap_content"
            android:layout_width="match_parent"
            android:layout_marginLeft="@dimen/keyline_2_session_detail"
            android:layout_marginRight="@dimen/keyline_1"
            android:text="@string/placeholder_session_subtitle"
            android:id="@+id/session_subtitle"
            android:maxLines="2"
            android:ellipsize="end"
            android:textSize="16sp"
            android:textColor="@color/body_text_2_inverse" />
            <!--android:textAlignment="viewStart" -->

    </LinearLayout>

布局工具栏\u actionbar.xml

        <include layout="@layout/toolbar_actionbar" />

        <!-- Session title -->
        <TextView android:layout_height="wrap_content"
            android:layout_width="match_parent"
            android:layout_marginBottom="0dp"
            android:layout_marginLeft="@dimen/keyline_2_session_detail"
            android:layout_marginRight="@dimen/keyline_1"
            android:text="@string/placeholder_session_title"
            android:id="@+id/session_title"
            android:maxLines="4"
            android:ellipsize="end"
            android:textSize="@dimen/text_size_large"
            android:lineSpacingMultiplier="1.1"
            android:textStyle="@integer/font_textStyle_medium"
            android:fontFamily="@string/font_fontFamily_medium"
            android:textColor="@color/body_text_1_inverse" />
        <!--android:textAlignment="viewStart" -->


        <!-- Session subtitle -->
        <TextView android:layout_height="wrap_content"
            android:layout_width="match_parent"
            android:layout_marginLeft="@dimen/keyline_2_session_detail"
            android:layout_marginRight="@dimen/keyline_1"
            android:text="@string/placeholder_session_subtitle"
            android:id="@+id/session_subtitle"
            android:maxLines="2"
            android:ellipsize="end"
            android:textSize="16sp"
            android:textColor="@color/body_text_2_inverse" />
            <!--android:textAlignment="viewStart" -->

    </LinearLayout>

<android.support.v7.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:iosched="http://schemas.android.com/apk/res-auto"
    iosched:theme="@style/ActionBarThemeOverlay"
    iosched:popupTheme="@style/ActionBarPopupThemeOverlay"
    android:id="@+id/toolbar_actionbar"
    android:background="@null"
    iosched:titleTextAppearance="@style/ActionBar.TitleText"
    iosched:contentInsetStart="0dp"
    android:layout_width="match_parent"
    android:layout_height="?actionBarSize"
/>

menu.xml：

        <include layout="@layout/toolbar_actionbar" />

        <!-- Session title -->
        <TextView android:layout_height="wrap_content"
            android:layout_width="match_parent"
            android:layout_marginBottom="0dp"
            android:layout_marginLeft="@dimen/keyline_2_session_detail"
            android:layout_marginRight="@dimen/keyline_1"
            android:text="@string/placeholder_session_title"
            android:id="@+id/session_title"
            android:maxLines="4"
            android:ellipsize="end"
            android:textSize="@dimen/text_size_large"
            android:lineSpacingMultiplier="1.1"
            android:textStyle="@integer/font_textStyle_medium"
            android:fontFamily="@string/font_fontFamily_medium"
            android:textColor="@color/body_text_1_inverse" />
        <!--android:textAlignment="viewStart" -->


        <!-- Session subtitle -->
        <TextView android:layout_height="wrap_content"
            android:layout_width="match_parent"
            android:layout_marginLeft="@dimen/keyline_2_session_detail"
            android:layout_marginRight="@dimen/keyline_1"
            android:text="@string/placeholder_session_subtitle"
            android:id="@+id/session_subtitle"
            android:maxLines="2"
            android:ellipsize="end"
            android:textSize="16sp"
            android:textColor="@color/body_text_2_inverse" />
            <!--android:textAlignment="viewStart" -->

    </LinearLayout>

<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:iosched="http://schemas.android.com/apk/res-auto">
<item android:id="@+id/menu_map_room"
    android:icon="@drawable/ic_action_map"
    android:title="@string/description_map"
    android:orderInCategory="1"
    iosched:showAsAction="ifRoom" />
<item android:id="@+id/menu_share"
    android:icon="@drawable/ic_action_share"
    android:title="@string/description_share"
    android:orderInCategory="1"
    iosched:showAsAction="ifRoom" />
<item android:id="@+id/menu_social_stream"
    android:icon="@drawable/ic_action_social_stream"
    android:title="@string/description_social_stream"
    android:orderInCategory="1"
    android:visible="true"
    iosched:showAsAction="ifRoom" />

---

您可以将主要内容添加到scrollview中，并从中删除工具栏。然后，在滚动时应使用淡入淡出效果

        <include layout="@layout/toolbar_actionbar" />

        <!-- Session title -->
        <TextView android:layout_height="wrap_content"
            android:layout_width="match_parent"
            android:layout_marginBottom="0dp"
            android:layout_marginLeft="@dimen/keyline_2_session_detail"
            android:layout_marginRight="@dimen/keyline_1"
            android:text="@string/placeholder_session_title"
            android:id="@+id/session_title"
            android:maxLines="4"
            android:ellipsize="end"
            android:textSize="@dimen/text_size_large"
            android:lineSpacingMultiplier="1.1"
            android:textStyle="@integer/font_textStyle_medium"
            android:fontFamily="@string/font_fontFamily_medium"
            android:textColor="@color/body_text_1_inverse" />
        <!--android:textAlignment="viewStart" -->


        <!-- Session subtitle -->
        <TextView android:layout_height="wrap_content"
            android:layout_width="match_parent"
            android:layout_marginLeft="@dimen/keyline_2_session_detail"
            android:layout_marginRight="@dimen/keyline_1"
            android:text="@string/placeholder_session_subtitle"
            android:id="@+id/session_subtitle"
            android:maxLines="2"
            android:ellipsize="end"
            android:textSize="16sp"
            android:textColor="@color/body_text_2_inverse" />
            <!--android:textAlignment="viewStart" -->

    </LinearLayout>

相对于所有屏幕

相对线内的工具栏对齐父顶部，透明

滚动查看与所有屏幕相对的内部视图

当您向下滚动X距离scrollView和viceversa时，工具栏从透明变为主题颜色

您可以在java中获得colorPrimary或colorPrimaryDark，因此：

        <include layout="@layout/toolbar_actionbar" />

        <!-- Session title -->
        <TextView android:layout_height="wrap_content"
            android:layout_width="match_parent"
            android:layout_marginBottom="0dp"
            android:layout_marginLeft="@dimen/keyline_2_session_detail"
            android:layout_marginRight="@dimen/keyline_1"
            android:text="@string/placeholder_session_title"
            android:id="@+id/session_title"
            android:maxLines="4"
            android:ellipsize="end"
            android:textSize="@dimen/text_size_large"
            android:lineSpacingMultiplier="1.1"
            android:textStyle="@integer/font_textStyle_medium"
            android:fontFamily="@string/font_fontFamily_medium"
            android:textColor="@color/body_text_1_inverse" />
        <!--android:textAlignment="viewStart" -->


        <!-- Session subtitle -->
        <TextView android:layout_height="wrap_content"
            android:layout_width="match_parent"
            android:layout_marginLeft="@dimen/keyline_2_session_detail"
            android:layout_marginRight="@dimen/keyline_1"
            android:text="@string/placeholder_session_subtitle"
            android:id="@+id/session_subtitle"
            android:maxLines="2"
            android:ellipsize="end"
            android:textSize="16sp"
            android:textColor="@color/body_text_2_inverse" />
            <!--android:textAlignment="viewStart" -->

    </LinearLayout>

            TypedValue typedValue = new TypedValue();
            MainActivity.this.getTheme().resolveAttribute(R.attr.colorPrimary, typedValue, true);
            final int color = typedValue.data;

---

它不像听起来那么简单…：）事实上我有工具栏，除了褪色效果。我第一次使用工具栏时，我把它放在滚动视图中，得到的问题和你一样。