android - 在子视图上调用 setVisibility(View.VISIBLE) 后，Android ScrollView 滚动到顶部

Question

我有ScrollView一个RelativeLayout里面有一个。这里面RelativeLayout有几个s。View这几个Views 之一是 a CheckBox。当CheckBox被检查/未选中时，其他ViewS应该相应地出现/消失。出现和消失的工作正常，但是每次目标Views出现或消失时，ScrollView滚动都会一直到顶部，我被迫去向下滚动以查看发生了什么。

我用来控制可见性的代码是：

public void crossCountryCheckboxClicked(View view)
{
    CheckBox crossCountryCheckBox = (CheckBox)findViewById(R.id.checkbox_cross_country);
    EditText crossCountryHoursTextBox = (EditText)findViewById(R.id.cross_country_hours);
    if (crossCountryCheckBox.isChecked())
    {
        crossCountryHoursTextBox.setVisibility(View.VISIBLE);
    }
    else
    {
        crossCountryHoursTextBox.setVisibility(View.GONE);
    }
}

并通过在 XML 布局文件中指定元素的属性crossCountryCheckboxClicked()来调用该方法。android:onClickCheckBox

这是 XML 布局文件：

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:custom="http://schemas.android.com/apk/res/logbook.app.activities"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >

<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" >

    <TextView
        android:id="@+id/flight_date"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" />

    <EditText
        android:id="@+id/aeroplane_type"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/flight_date"
        android:hint="@string/aeroplane_type" />

    <EditText
        android:id="@+id/aeroplane_registration"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/aeroplane_type"
        android:hint="@string/aeroplane_registration" />

    <EditText
        android:id="@+id/pilot_name"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/aeroplane_registration"
        android:hint="@string/pilot_name" />

    <EditText
        android:id="@+id/copilot_name"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/pilot_name"
        android:hint="@string/copilot_name" />

    <EditText
        android:id="@+id/from_aerodome"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/copilot_name"
        android:hint="@string/from_aerodome" />

    <EditText
        android:id="@+id/to_aerodome"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/copilot_name"
        android:layout_toRightOf="@id/from_aerodome"
        android:hint="@string/to_aerodome" />

    <EditText
        android:id="@+id/remarks"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/from_aerodome"
        android:hint="@string/remarks" />

    <Spinner
        android:id="@+id/aircraft_engine_type_spinner"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/remarks" />

    <Spinner
        android:id="@+id/time_of_day_spinner"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/aircraft_engine_type_spinner" />

    <Spinner
        android:id="@+id/pilot_role_spinner"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/time_of_day_spinner" />

    <TextView
        android:id="@+id/on_time"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/pilot_role_spinner"
        android:hint="@string/on_time_hint" />

    <TextView
        android:id="@+id/takeoff_time"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/on_time"
        android:hint="@string/takeoff_time_hint" />

    <TextView
        android:id="@+id/landing_time"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/takeoff_time"
        android:hint="@string/landing_time_hint" />

    <TextView
        android:id="@+id/off_time"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/landing_time"
        android:hint="@string/off_time_hint" />

    <Button
        android:id="@+id/button_record"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/off_time"
        android:onClick="recordTime"
        android:padding="5dp"
        android:text="@string/button_record" />

    <Button
        android:id="@+id/button_reset"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/off_time"
        android:layout_toRightOf="@id/button_record"
        android:onClick="resetAllTimes"
        android:padding="5dp"
        android:text="@string/button_reset" />

    <CheckBox
        android:id="@+id/checkbox_ifr"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/button_record"
        android:text="@string/checkbox_ifr"
        android:onClick="ifrCheckboxClicked" />

    <CheckBox
        android:id="@+id/checkbox_cross_country"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/button_record"
        android:layout_toRightOf="@id/checkbox_ifr"
        android:text="@string/checkbox_cross_country"
        android:onClick="crossCountryCheckboxClicked" />

    <Spinner
        android:id="@+id/ifr_type_spinner"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/checkbox_ifr"
        android:visibility="gone" />

    <TextView
        android:id="@+id/label_ifr_approaches"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/ifr_type_spinner"
        android:hint="@string/ifr_landings_label"
        android:visibility="gone" />

    <logbook.app.custom.widgets.NumberSelector
        android:id="@+id/ifr_landings_selector"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/label_ifr_approaches"
        android:visibility="gone"
        custom:orientation="vertical" />

    <EditText
        android:id="@+id/ifr_hours"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/ifr_landings_selector"
        android:hint="@string/ifr_hours_hint"
        android:inputType="number"
        android:visibility="gone" />

    <EditText
        android:id="@+id/cross_country_hours"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/ifr_hours"
        android:hint="@string/cross_country_hours_hint"
        android:inputType="number"
        android:visibility="gone" />

    <TextView
        android:id="@+id/label_takeoffs_landings"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/cross_country_hours"
        android:hint="@string/takeoffs_landings_label" />

    <logbook.app.custom.widgets.NumberSelector
        android:id="@+id/landings_selector"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/label_takeoffs_landings"
        custom:orientation="horizontal" />

    <Button
        android:id="@+id/button_create_log"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/landings_selector"
        android:onClick="createLog"
        android:padding="5dp"
        android:text="@string/button_create_log" />

</RelativeLayout>

ScrollView每次其子项的可见性在View.GONE和之间更改时，如何阻止滚动到顶部View.Visible？

Answer 1

我认为您想在新的可见视图crossCountryHoursTextBox 中向下滚动滚动条，只需像这样滚动滚动条

// scrollview at visible textbox
yourscroll.smoothScrollBy(0,crossCountryHoursTextBox.getTop()); 

Answer 2

尝试这个：

<LinearLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  android:orientation = "vertical" >

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="fill_parent"
   android:layout_height="wrap_content" >

<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >

<TextView
    android:id="@+id/flight_date"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content" />

<EditText
    android:id="@+id/aeroplane_type"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_below="@id/flight_date"
    android:hint="@string/aeroplane_type" />

<EditText
    android:id="@+id/aeroplane_registration"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_below="@id/aeroplane_type"
    android:hint="@string/aeroplane_registration" />

<EditText
    android:id="@+id/pilot_name"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_below="@id/aeroplane_registration"
    android:hint="@string/pilot_name" />

<EditText
    android:id="@+id/copilot_name"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_below="@id/pilot_name"
    android:hint="@string/copilot_name" />

<EditText
    android:id="@+id/from_aerodome"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_below="@id/copilot_name"
    android:hint="@string/from_aerodome" />

<EditText
    android:id="@+id/to_aerodome"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_below="@id/copilot_name"
    android:layout_toRightOf="@id/from_aerodome"
    android:hint="@string/to_aerodome" />

<EditText
    android:id="@+id/remarks"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_below="@id/from_aerodome"
    android:hint="@string/remarks" />

<Spinner
    android:id="@+id/aircraft_engine_type_spinner"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_below="@id/remarks" />

<Spinner
    android:id="@+id/time_of_day_spinner"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_below="@id/aircraft_engine_type_spinner" />

<Spinner
    android:id="@+id/pilot_role_spinner"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_below="@id/time_of_day_spinner" />

<TextView
    android:id="@+id/on_time"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_below="@id/pilot_role_spinner"
    android:hint="@string/on_time_hint" />

<TextView
    android:id="@+id/takeoff_time"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_below="@id/on_time"
    android:hint="@string/takeoff_time_hint" />

<TextView
    android:id="@+id/landing_time"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_below="@id/takeoff_time"
    android:hint="@string/landing_time_hint" />

<TextView
    android:id="@+id/off_time"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_below="@id/landing_time"
    android:hint="@string/off_time_hint" />

<Button
    android:id="@+id/button_record"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@id/off_time"
    android:onClick="recordTime"
    android:padding="5dp"
    android:text="@string/button_record" />

<Button
    android:id="@+id/button_reset"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@id/off_time"
    android:layout_toRightOf="@id/button_record"
    android:onClick="resetAllTimes"
    android:padding="5dp"
    android:text="@string/button_reset" />

<CheckBox
    android:id="@+id/checkbox_ifr"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@+id/button_record"
    android:text="@string/checkbox_ifr"
    android:onClick="ifrCheckboxClicked" />

<CheckBox
    android:id="@+id/checkbox_cross_country"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@+id/button_record"
    android:layout_toRightOf="@id/checkbox_ifr"
    android:text="@string/checkbox_cross_country"
    android:onClick="crossCountryCheckboxClicked" />

<Spinner
    android:id="@+id/ifr_type_spinner"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_below="@id/checkbox_ifr"
    android:visibility="gone" />

<TextView
    android:id="@+id/label_ifr_approaches"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@id/ifr_type_spinner"
    android:hint="@string/ifr_landings_label"
    android:visibility="gone" />

<logbook.app.custom.widgets.NumberSelector
    android:id="@+id/ifr_landings_selector"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@id/label_ifr_approaches"
    android:visibility="gone"
    custom:orientation="vertical" />

<EditText
    android:id="@+id/ifr_hours"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@id/ifr_landings_selector"
    android:hint="@string/ifr_hours_hint"
    android:inputType="number"
    android:visibility="gone" />

<EditText
    android:id="@+id/cross_country_hours"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@id/ifr_hours"
    android:hint="@string/cross_country_hours_hint"
    android:inputType="number"
    android:visibility="gone" />

<TextView
    android:id="@+id/label_takeoffs_landings"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@id/cross_country_hours"
    android:hint="@string/takeoffs_landings_label" />

<logbook.app.custom.widgets.NumberSelector
    android:id="@+id/landings_selector"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@id/label_takeoffs_landings"
    custom:orientation="horizontal" />

<Button
    android:id="@+id/button_create_log"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@id/landings_selector"
    android:onClick="createLog"
    android:padding="5dp"
    android:text="@string/button_create_log" />

</RelativeLayout>
</ScrollView>
</LinearLayout>