DrawerLayout/FrameLayout/TabLayout/AppBarLayout/NestedScrolling
FrameLayout中,默认的子控件都是左对齐的,我们可以通过layout_gravity属性控制子控件的位置。
TabLayout:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" xmlns:app="http://schemas.android.com/apk/res-auto" android:orientation="vertical"> <android.support.design.widget.TabLayout android:id="@+id/tab_FindFragment_title" android:layout_width="match_parent" android:layout_height="wrap_content" android:background="@color/titleBlue" app:tabIndicatorColor="@color/white" app:tabSelectedTextColor="@color/gray" app:tabTextColor="@color/white" /> <android.support.v4.view.ViewPager android:id="@+id/vp_FindFragment_pager" android:layout_width="fill_parent" android:layout_height="0dp" android:layout_weight="1" /> </LinearLayout>
AppBarLayout
AppBarLayout 继承自LinearLayout,子控件默认为竖直方向显示,可以用它实现Material Design 的Toolbar;它支持滑动手势;它的子控件可以通过在代码里调用setScrollFlags(int)
或者在XML里app:layout_scrollFlags
来设置它的滑动手势。当然实现这些的前提是它的根布局必须是 CoordinatorLayout。这里的滑动手势可以理解为:当某个可滚动View的滚动手势发生变化时,AppBarLayout内部的子View实现某种动作。
<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" tools:context=".home.MainActivity"> <android.support.design.widget.AppBarLayout android:layout_width="match_parent" android:layout_height="wrap_content" style="@style/Theme.AppCompat.Light" app:elevation="0dp"> <android.support.v7.widget.Toolbar android:id="@+id/toolbar" android:layout_width="match_parent" android:layout_height="?attr/actionBarSize" android:background="@color/colorPrimary" app:layout_scrollFlags="scroll|enterAlways" app:popupTheme="@style/AppTheme.PopupOverlay"/> <android.support.design.widget.TabLayout android:id="@+id/tabs" android:layout_width="match_parent" android:layout_height="wrap_content" app:tabBackground="@color/colorPrimary" app:tabIndicatorColor="@color/white"> </android.support.design.widget.TabLayout> </android.support.design.widget.AppBarLayout> <android.support.v4.view.ViewPager android:id="@+id/vp_moudle" android:layout_width="match_parent" android:layout_height="match_parent" app:layout_behavior="@string/appbar_scrolling_view_behavior"> </android.support.v4.view.ViewPager> <android.support.design.widget.FloatingActionButton android:id="@+id/fab" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="bottom|end" android:layout_margin="@dimen/fab_margin" app:backgroundTint="@color/colorPrimary" android:src="@drawable/ic_arrow_upward" app:layout_behavior="com.lvr.livecircle.widget.ScrollAwareFABBehavior"/> </android.support.design.widget.CoordinatorLayout>