android - NestedCoordinatorLayout 内的 NestedScrollView 有时会卡住
问题描述
我正在使用 NestedCoordinatorLayout 并在这里使用了答案。如图 1 所示,NestedCoordinatorLayout 与 RecyclerView 完美配合。图 1。问题是当我使用 NestedScrollView 而不是 RecyclerView 时,NestedCoordinatorLayout 没有监听 NestedScrollView 的手势,它有时会卡住我的意思是它没有按预期拉标题。但是如果我点击屏幕是拉动标题(图2)图2。
使用 RecyclerView 进行布局 - 完美运行
<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:map="http://schemas.android.com/tools">
<data>
<variable
name="centerMapVM"
type="com.groupbci.www.costumerservice.fragments.centerMap.CenterMapFragmentViewModel" />
</data>
<com.groupbci.www.costumerservice.views.NestedCoordinatorLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.AppBarLayout
android:id="@+id/my_appbar_container"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/white"
android:fitsSystemWindows="true"
app:layout_behavior="com.groupbci.www.costumerservice.views.FixedAppBarLayoutBehavior">
<RelativeLayout
android:id="@+id/rl_buttons"
android:layout_width="match_parent"
android:layout_height="334dp"
android:minHeight="181dp"
android:orientation="vertical"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<fragment
android:id="@+id/mapFragment"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/mapFragment"
android:layout_alignEnd="@+id/mapFragment"
android:layout_marginBottom="18dp"
android:layout_marginEnd="13dp"
android:gravity="bottom|end"
android:orientation="vertical">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="@{centerMapVM::onClickBtnLocation}"
android:src="@drawable/ic_location_btn"
app:layout_anchor="@id/mapFragment"
app:layout_anchorGravity="bottom|end" />
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:onClick="@{centerMapVM::onClickBtnCentersFilter}"
android:src="@drawable/ic_filter_white_2_btn"
app:layout_anchor="@id/mapFragment"
app:layout_anchorGravity="bottom|end" />
</LinearLayout>
</RelativeLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v7.widget.RecyclerView
android:id="@+id/rvCenters"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="-14dp"
android:background="@drawable/rounded_shape_top_corners"
app:layout_behavior="@string/appbar_scrolling_view_behavior" />
</com.groupbci.www.costumerservice.views.NestedCoordinatorLayout>
</layout>
使用 NestedScrollView 进行布局 - 无法正常工作
<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<data>
<variable
name="infoCenterVM"
type="com.groupbci.www.costumerservice.fragments.infoCenter.InfoCenterFragmentViewModel" />
</data>
<com.groupbci.www.costumerservice.views.NestedCoordinatorLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.AppBarLayout
android:id="@+id/appBarContainerInfoCenter"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fitsSystemWindows="true"
app:layout_behavior="com.groupbci.www.costumerservice.views.FixedAppBarLayoutBehavior">
<RelativeLayout
android:id="@+id/rl_buttonsTemp"
android:layout_width="match_parent"
android:layout_height="140dp"
android:minHeight="99dp"
android:orientation="vertical"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<fragment
android:id="@+id/mapFragmentInfoCenter"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</RelativeLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.widget.NestedScrollView
android:id="@+id/nesScroTemp"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@android:color/holo_red_light"
android:fillViewport="true"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
android:fitsSystemWindows="true">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="@string/some_text" />
<!--TODO fix the nestedScroll-->
</android.support.v4.widget.NestedScrollView>
</com.groupbci.www.costumerservice.views.NestedCoordinatorLayout>
</layout>
类 NestedCoordinatorLayout
@SuppressWarnings("unused")
public class NestedCoordinatorLayout extends CoordinatorLayout implements NestedScrollingChild {
private NestedScrollingChildHelper mChildHelper;
public NestedCoordinatorLayout(Context context) {
super(context);
mChildHelper = new NestedScrollingChildHelper(this);
setNestedScrollingEnabled(true);
}
public NestedCoordinatorLayout(Context context, AttributeSet attrs) {
super(context, attrs);
mChildHelper = new NestedScrollingChildHelper(this);
setNestedScrollingEnabled(true);
}
public NestedCoordinatorLayout(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
mChildHelper = new NestedScrollingChildHelper(this);
setNestedScrollingEnabled(true);
}
@Override
public void onNestedPreScroll(View target, int dx, int dy, int[] consumed, int type) {
int[][] tConsumed = new int[2][2];
super.onNestedPreScroll(target, dx, dy, consumed, type);
dispatchNestedPreScroll(dx, dy, tConsumed[1], null);
consumed[0] = tConsumed[0][0] + tConsumed[1][0];
consumed[1] = tConsumed[0][1] + tConsumed[1][1];
}
@Override
public void onNestedScroll(View target, int dxConsumed, int dyConsumed, int dxUnconsumed, int dyUnconsumed, int type) {
super.onNestedScroll(target, dxConsumed, dyConsumed, dxUnconsumed, dyUnconsumed, type);
dispatchNestedScroll(dxConsumed, dyConsumed, dxUnconsumed, dyUnconsumed, null);
}
@Override
public void onStopNestedScroll(View target, int type) {
/* Disable the scrolling behavior of our own children */
super.onStopNestedScroll(target, type);
/* Disable the scrolling behavior of the parent's other children */
stopNestedScroll();
}
@Override
public boolean onStartNestedScroll(View child, View target, int nestedScrollAxes, int type) {
/* Enable the scrolling behavior of our own children */
boolean tHandled = super.onStartNestedScroll(child, target, nestedScrollAxes, type);
/* Enable the scrolling behavior of the parent's other children */
return startNestedScroll(nestedScrollAxes) || tHandled;
}
@Override
public boolean onStartNestedScroll(View child, View target, int nestedScrollAxes) {
/* Enable the scrolling behavior of our own children */
boolean tHandled = super.onStartNestedScroll(child, target, nestedScrollAxes);
/* Enable the scrolling behavior of the parent's other children */
return startNestedScroll(nestedScrollAxes) || tHandled;
}
@Override
public void onStopNestedScroll(View target) {
/* Disable the scrolling behavior of our own children */
super.onStopNestedScroll(target);
/* Disable the scrolling behavior of the parent's other children */
stopNestedScroll();
}
@Override
public void onNestedPreScroll(View target, int dx, int dy, int[] consumed) {
int[][] tConsumed = new int[2][2];
super.onNestedPreScroll(target, dx, dy, tConsumed[0]);
dispatchNestedPreScroll(dx, dy, tConsumed[1], null);
consumed[0] = tConsumed[0][0] + tConsumed[1][0];
consumed[1] = tConsumed[0][1] + tConsumed[1][1];
}
@Override
public void onNestedScroll(View target, int dxConsumed, int dyConsumed,
int dxUnconsumed, int dyUnconsumed) {
super.onNestedScroll(target, dxConsumed, dyConsumed, dxUnconsumed, dyUnconsumed);
dispatchNestedScroll(dxConsumed, dyConsumed, dxUnconsumed, dyUnconsumed, null);
}
@Override
public boolean onNestedPreFling(View target, float velocityX, float velocityY) {
boolean tHandled = super.onNestedPreFling(target, velocityX, velocityY);
return dispatchNestedPreFling(velocityX, velocityY) || tHandled;
}
@Override
public boolean onNestedFling(View target, float velocityX, float velocityY, boolean consumed) {
boolean tHandled = super.onNestedFling(target, velocityX, velocityY, consumed);
return dispatchNestedFling(velocityX, velocityY, consumed) || tHandled;
}
@Override
public boolean isNestedScrollingEnabled() {
return mChildHelper.isNestedScrollingEnabled();
}
@Override
public void setNestedScrollingEnabled(boolean enabled) {
mChildHelper.setNestedScrollingEnabled(enabled);
}
@Override
public boolean startNestedScroll(int axes) {
return mChildHelper.startNestedScroll(axes);
}
@Override
public void stopNestedScroll() {
mChildHelper.stopNestedScroll();
}
@Override
public boolean hasNestedScrollingParent() {
return mChildHelper.hasNestedScrollingParent();
}
@Override
public boolean dispatchNestedScroll(int dxConsumed, int dyConsumed, int dxUnconsumed,
int dyUnconsumed, int[] offsetInWindow) {
return mChildHelper.dispatchNestedScroll(dxConsumed, dyConsumed, dxUnconsumed,
dyUnconsumed, offsetInWindow);
}
@Override
public boolean dispatchNestedPreScroll(int dx, int dy, int[] consumed, int[] offsetInWindow) {
return mChildHelper.dispatchNestedPreScroll(dx, dy, consumed, offsetInWindow);
}
@Override
public boolean dispatchNestedFling(float velocityX, float velocityY, boolean consumed) {
return mChildHelper.dispatchNestedFling(velocityX, velocityY, consumed);
}
@Override
public boolean dispatchNestedPreFling(float velocityX, float velocityY) {
return mChildHelper.dispatchNestedPreFling(velocityX, velocityY);
}
}
解决方案
好的,它更快,我找到了答案。NestedScrollView 中存在的问题而不是 RecyclerView 中存在的问题。所以我用在这个
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