Question

我有xml，其中包含DrawerLayout，CoordinatorLayout custom views，AppBarLayout，NestedScrollView。

问题：当NestedtScrollView中的内容填充时，NestedtScrollView向下滚动。所有针对scrollView.setScrollY(0)的研究或layout_behavior = FixedScrollingViewBehavior的自定义类都没有帮助我。

如何阻止此滚动

    <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'

Answer 1

尝试将android:descendantFocusability="blocksDescendants"设置为LinearLayout内的NestedScrollView。它对我有用。

UPD：谨防使用像EditText这样的布局后代元素，这些元素应该成为焦点：元素不会成为焦点。如果您知道如何解决这个问题，请告诉我们。

Answer 2

阻止焦点的另一种方法是添加一个可以窃取焦点的新视图。把它放在NestedScrollView上面的任何地方，它应该工作：

CKEDITOR.replace( 'editor1' );

Answer 3

这对我有用：

mNestedScrollViewChat.post(new Runnable(){
    @Override
    public void run(){
        mNestedScrollViewChat.fullScroll(View.FOCUS_DOWN);
    }
});

Answer 4

这在Kotlin对我有用

function rotateWheel(){
  angle = angle + acceleration
  while (angle >= 360) {
    angle = angle - 360
  } 
  var wheel = document.getElementById("wheel")
  wheel.style.transform = "rotate("+angle +"deg)"
  // play the click when a new segment rotates by
  if(Math.floor(angle/21) != previousSegment){
     playsound()
     previousSegment = Math.floor(angle/21)

Answer 5

在嵌套ScrollView的子视图中添加android:descendantFocusability="beforeDescendants"并添加和android:focusableInTouchMode="true" android：focusableInTouchMode =“ true”' becase 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>

当内容填充时，NestedScrollView向下滚动

5 个答案: