62

我有 xml，它由DrawerLayout,CoordinatorLayout和custom views,AppBarLayout组成NestedScrollView。

问题：NestedtScrollView填充内容时，NestedtScrollView会自行向下滚动。所有像scrollView.setScrollY(0)或自定义类的研究都layout_behavior = FixedScrollingViewBehavior没有帮助我。

我如何防止这种滚动

    <android.support.v4.widget.DrawerLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/drawer"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true">


<LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

    <android.support.design.widget.CoordinatorLayout
            xmlns:android="http://schemas.android.com/apk/res/android"
            xmlns:app="http://schemas.android.com/apk/res-auto"
            android:id="@+id/main_content"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_weight="1">

        <android.support.design.widget.AppBarLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:fitsSystemWindows="true"
                android:background="@color/semitransparet_color_primary">

            <android.support.v7.widget.Toolbar
                    xmlns:android="http://schemas.android.com/apk/res/android"
                    xmlns:app="http://schemas.android.com/apk/res-auto"
                    android:id="@+id/actionbar_toolbar"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:minHeight="?attr/actionBarSize"
                    app:layout_scrollFlags="scroll|enterAlways"
                    app:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
                    app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
                    app:elevation="4dp"/>

        </android.support.design.widget.AppBarLayout>

        <ProgressBar
                android:id="@+id/progress"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center"/>
        <android.support.v4.widget.NestedScrollView
                android:id="@+id/product_scroll_wrpr"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:visibility="gone">

            <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:orientation="vertical">

                // my content is here

            </LinearLayout>


        </android.support.v4.widget.NestedScrollView>



    </android.support.design.widget.CoordinatorLayout>

    <LinearLayout
            android:id="@+id/buttons_bar"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:visibility="gone"
            android:background="#01579B"
            android:layout_gravity="bottom"
            android:orientation="horizontal"
            android:padding="8dp"
            android:gravity="center_vertical">

    // here are my buttons

</LinearLayout>

<android.support.design.widget.NavigationView
        android:id="@+id/navi"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:fitsSystemWindows="true"
        android:background="@android:color/white"
        app:headerLayout="@layout/drawer_header_left"
        app:menu="@menu/nav_drawer_menu"/>

我的build.gradle构成

compile 'com.android.support:support-v4:23.1.0'

compile 'com.android.support:design:23.0.1'
4

5 回答 5

206

尝试设置android:descendantFocusability="blocksDescendants"到LinearLayout里面NestedScrollView。这个对我有用。

UPD：小心在布局中使用后代元素，例如EditText，它应该获得焦点：这些元素不会获得焦点。如果您知道如何解决此问题，请告诉我们。

于 2016-03-28T11:44:29.540 回答
19

阻止焦点的另一种方法是添加一个将窃取焦点的新视图。将它放在 NestedScrollView 上方的任何位置，它应该可以工作：

    <!--focusStealer, to avoid NestedScrollingView to scroll due to dynamically created views that take the focus-->
    <View
        android:layout_width="0px" android:layout_height="0px" android:focusable="true"
        android:focusableInTouchMode="true"/>
于 2017-08-10T11:37:57.763 回答
6

这对我有用：

mNestedScrollViewChat.post(new Runnable(){
    @Override
    public void run(){
        mNestedScrollViewChat.fullScroll(View.FOCUS_DOWN);
    }
});
于 2018-12-13T11:08:50.340 回答
2

这在 Kotlin 中对我有用

 nestedScrollView.post { nestedScrollView.fullScroll(View.FOCUS_DOWN) }
于 2020-04-27T07:32:57.607 回答
0

在 NestedScrollView 的子视图中添加android:descendantFocusability="beforeDescendants"和添加android:focusableInTouchMode="true"android:focusableInTouchMode="true"' 因为nestedScrollView 需要在滚动之前聚焦视图。我尝试从子视图中聚焦 Edittext 以获得焦点

 <EditText
        android:id="@+id/edtAddressAccount"
        style="@style/StyleEditText"
        android:autofillHints=""
        android:ems="10"
        android:inputType="textPersonName"
        android:singleLine="true"
        android:nextFocusUp="@+id/edtAddressAccount"
        android:nextFocusLeft="@id/edtAddressAccount"
        app:layout_constraintEnd_toEndOf="@+id/edtDistrict"
        app:layout_constraintStart_toStartOf="@+id/textView13"
        app:layout_constraintTop_toBottomOf="@+id/textView13" />

完整代码在这里

 <androidx.core.widget.NestedScrollView 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"
android:background="@color/white"
android:orientation="vertical"
android:id="@+id/nestedAccount"
android:layout_weight="1"
tools:context="jp.co.ramen.ui.auth.account.AccountFragment">

<androidx.constraintlayout.widget.ConstraintLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:focusable="true"
    android:focusableInTouchMode="true"
    android:descendantFocusability="beforeDescendants"

    >

    <jp.co.ramen.utils.customview.DropDown
        android:id="@+id/spGenderAccount"
        style="@style/StyleSpinner"
        app:layout_constraintEnd_toEndOf="@+id/edtAddressAccount"
        app:layout_constraintStart_toStartOf="@+id/textView14"
        app:layout_constraintTop_toBottomOf="@+id/textView14" />

    <include
        android:id="@+id/textView14"
        layout="@layout/include_text_require"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginTop="@dimen/_12sdp"
        app:layout_constraintStart_toStartOf="@+id/edtAddressAccount"
        app:layout_constraintTop_toBottomOf="@+id/edtAddressAccount" />

    <EditText
        android:id="@+id/edtDistrict"
        style="@style/StyleEditText"
        android:autofillHints=""
        android:ems="10"
        android:inputType="textPersonName"
        android:singleLine="true"
        android:nextFocusUp="@+id/edtAddressAccount"
        android:nextFocusLeft="@id/edtAddressAccount"
        app:layout_constraintEnd_toEndOf="@+id/liner2"
        app:layout_constraintStart_toStartOf="@+id/textView12"
        app:layout_constraintTop_toBottomOf="@+id/textView12" />
...more view
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.core.widget.NestedScrollView>
于 2020-11-12T04:18:22.460 回答