我正在尝试实现类似于instagram的图库模块,其中包含图像的gridview将独立滚动但在滚动gridview时如果我触摸appbarlayout,它应该开始向上滚动。我能够通过setnestedscrollview实现它,但是当appbarlayout崩溃时,它不会崩溃,直到我把画廊带到top.so我被困在如何在gridview不在起点但在某处时在工具栏的触摸上展开appbar布局在between.here是我的xml
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:id="@+id/coordinator"
android:focusableInTouchMode="false"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<GridView
android:layout_below="@+id/iv"
android:id="@+id/gridView"
android:layout_width="fill_parent"
android:layout_height="match_parent"
android:layout_margin="5dp"
android:columnWidth="100dp"
android:drawSelectorOnTop="true"
android:gravity="center"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
android:numColumns="5"
android:stretchMode="columnWidth"
android:verticalSpacing="5dp"
android:focusable="true"
android:clickable="true"/>
<android.support.design.widget.AppBarLayout
android:id="@+id/app_bar_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:animateLayoutChanges="true"
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"
android:animateLayoutChanges="true"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
app:expandedTitleMarginStart="48dp"
app:expandedTitleMarginEnd="64dp"
android:fitsSystemWindows="true">
<ImageView
android:id="@+id/image"
android:src="@drawable/pup"
android:layout_width="match_parent"
android:layout_height="400dp"
android:scaleType="centerCrop"
android:adjustViewBounds="true"
android:fitsSystemWindows="true"
/>
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="40dp"
app:layout_collapseMode="pin"
android:background="@android:color/transparent"
app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
/>
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
这里我是如何实现nestedscrollview
的 gridView.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View view, MotionEvent motionEvent) {
int y = (int)motionEvent.getRawY();
if(y<=h)
{
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
gridView.setNestedScrollingEnabled(true);
}
else{
}
}
else
{
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
gridView.setNestedScrollingEnabled(false);
}
else
{
}}
return false;
}
});
答案 0 :(得分:1)
<android.support.v4.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
android:fillViewport="true"
android:id="@+id/nsv">
<GridView
android:layout_below="@+id/iv"
android:id="@+id/gridView"
android:layout_width="fill_parent"
android:layout_height="match_parent"
android:layout_margin="5dp"
android:columnWidth="100dp"
android:drawSelectorOnTop="true"
android:gravity="center"
android:numColumns="3"
android:stretchMode="columnWidth"
android:verticalSpacing="5dp"
android:focusable="true"
android:clickable="true"
app:layout_behavior="@string/appbar_scrolling_view_behavior" />
</android.support.v4.widget.NestedScrollView>
并且触摸网格 -
int flag=1,flag2=0;
gridView.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent motionEvent) {
if (motionEvent.getAction() == MotionEvent.ACTION_DOWN) {
v.getParent().requestDisallowInterceptTouchEvent(true);}
if (motionEvent.getAction() == MotionEvent.ACTION_MOVE) {
int y = (int) motionEvent.getRawY();
if (flag == 1) {
if (y <= h) {
v.getParent().requestDisallowInterceptTouchEvent(false);
boolean fullyExpanded = (appBarLayout.getHeight() - appBarLayout.getBottom()) == 0;
if (fullyExpanded) {
flag2=0;
}
else
{flag2=1;
v.getParent().requestDisallowInterceptTouchEvent(true);
if(gridView.getChildAt(0).getTop()==0)
{
v.getParent().requestDisallowInterceptTouchEvent(false);
}
else
{
v.getParent().requestDisallowInterceptTouchEvent(true);}}}
else
{
v.getParent().requestDisallowInterceptTouchEvent(true);
flag2=0;}
}}
if (motionEvent.getAction() == MotionEvent.ACTION_UP) {
v.getParent().requestDisallowInterceptTouchEvent(true);
}
return false;
}});
并切换coordinatorlayout的触摸 -
coordinatorLayout.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View view, MotionEvent motionEvent) {
boolean fullyExpanded = (appBarLayout.getHeight() - appBarLayout.getBottom()) == 0;
if(flag2==0&&fullyExpanded)
return true;
else{
flag2=0;
return false;
}}
});