我在嵌套的Scrollview中使用带有NestedScrollView和Viewpager的Collapsing ToolBar Layout.
我有3个标签,这些标签有3个片段.这些片段使用RecyclerView来设置数据.
现在使用nestedScrollView和viewpager,当我滚动RecyclerView内容时,折叠效果不起作用.
我还需要放置NestedScrollView,因为我需要在Tabs上面显示一些信息.
这是我的代码：
<android.support.design.widget.AppBarLayout
android:id="@+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
android:fitsSystemWindows="true">
<android.support.design.widget.CollapsingToolbarLayout
android:id="@+id/collapsing_toolbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
android:fitsSystemWindows="true"
app:contentScrim="?attr/colorPrimary"
app:expandedTitleMarginEnd="64dp"
app:expandedTitleMarginStart="48dp"
app:expandedTitleTextAppearance="@style/TransparentText">
<FrameLayout
android:id="@+id/carouselLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
android:fitsSystemWindows="true"
app:layout_collapseMode="parallax">
<ImageView
android:id="@+id/coverImage"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:src="@drawable/example"
android:scaleType="centerCrop"/>
<LinearLayout
android:layout_width="match_parent"
android:gravity="bottom"
android:orientation="vertical"
android:layout_gravity="bottom"
android:padding="@dimen/profile_image_margin"
android:background="@drawable/gradient_bg"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
android:layout_height="wrap_content">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="@dimen/profile_image_margin"
android:textSize="@dimen/text_size_xlarge"
android:textStyle="bold"
android:textColor="@color/white"
android:text="Title"
android:id="@+id/content_title"/>
</LinearLayout>
</FrameLayout>
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:theme="@style/ActionBarThemeOverlay"
app:popupTheme="@style/ActionBarPopupThemeOverlay"
app:layout_scrollFlags="scroll|enterAlways"
android:background="@drawable/gradient_bg" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="fill"
android:isScrollContainer="true"
app:layout_behavior="@string/appbar_scrolling_view_behavior">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="sdjsfksdfsd"
android:textColor="@color/red"/>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="csdffsfsdfsdfsdf"
android:textColor="@color/red"/>
<android.support.design.widget.TabLayout
android:id="@+id/slidingTabs"
android:layout_width="match_parent"
app:tabMode="scrollable"
app:tabGravity="fill"
android:layout_height="wrap_content"/>
<android.support.v4.view.ViewPager
android:id="@+id/pager"
android:layout_width="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
android:layout_height="300dp">
</android.support.v4.view.ViewPager>
</LinearLayout>
</android.support.v4.widget.NestedScrollView>
如果你有任何想法如何在android中的NestedScrollview中实现Recyclerview,请帮助我,这样我就可以使用了.
解决方法
看来这已经在这里得到了回答：
https://stackoverflow.com/a/31561790/4931825
https://stackoverflow.com/a/31561790/4931825
您还可以查看上述答案中提供的此示例
https://github.com/TheLittleNaruto/SupportDesignExample/
作者创建了一个自定义的NestedScrollView类,扩展了NestedScrollView,它覆盖了onInterceptTouchEvent方法,如下所示：
@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
final float x = ev.getX();
final float y = ev.getY();
switch (ev.getAction()) {
case MotionEvent.ACTION_DOWN:
xDistance = yDistance = 0f;
lastX = ev.getX();
lastY = ev.getY();
break;
case MotionEvent.ACTION_MOVE:
final float curX = ev.getX();
final float curY = ev.getY();
xDistance += Math.abs(curX - lastX);
yDistance += Math.abs(curY - lastY);
lastX = curX;
lastY = curY;
if (xDistance > yDistance)
return false;
}
return super.onInterceptTouchEvent(ev) || ev.getPointerCount() == 2;
}
和一个扩展ViewPager的自定义ViewPager类,它覆盖了它的onMeasure方法,如下所示：
@Override
protected void onMeasure(int widthMeasureSpec,int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec,heightMeasureSpec);
int height = 0;
for (int i = 0; i < getChildCount(); i++) {
View child = getChildAt(i);
child.measure(widthMeasureSpec,MeasureSpec.makeMeasureSpec(0,MeasureSpec.UNSPECIFIED));
int h = child.getMeasuredHeight();
if (h > height) height = h;
}
heightMeasureSpec = MeasureSpec.makeMeasureSpec(height,MeasureSpec.EXACTLY);
super.onMeasure(widthMeasureSpec,heightMeasureSpec);
}
最后,他在CoordinatorLayout中使用了两个：
<com.thelittlenaruto.supportdesignexample.customview.MyNestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior">
<LinearLayout
android:id="@+id/lin"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:visibility="visible">
<com.thelittlenaruto.supportdesignexample.customview.WrapContentHeightViewPager
android:id="@+id/viewPager"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
</com.thelittlenaruto.supportdesignexample.customview.MyNestedScrollView>
