我有一个相对的布局，可以通过编程方式添加TextView，但是我还需要能够最终删除所有这些视图，同时保持LinearLayouts完整，这有可能吗？
此代码中的xml是FragmentStatePageAdapter的片段。我一直在尝试找到一种方法，以在用户滚动时添加和删除视图，类似于Google日历的功能。下面的代码显示了我先前修复该解决方案的尝试。 RelativeLayout将添加到scrollView内，而TextViews将以编程方式添加到onCreateView中。当前的实现大部分情况下都有效，但是向后滑动一个视图时无法正常工作（LinearLayout的顶部栏被删除，而不是onCreateView中创建的按钮。我的最佳猜测是未调用BringChildToFront（）方法，但我不确定为什么。
我还试图在onPause（）和onResume（）中实现此代码，从而完全放弃了功能。
因此，我想在onCreateView中使用pageChangeListener删除任何不是LinearLayout的视图，然后调用要显示的新视图。我应该提到的是，我仅使用按钮测试代码，并计划以后用textViews替换它们，以便从数据库中收集数据。
single_day_content.xml
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<!--This LinearLayout creates all the hours on main activity-->
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:orientation="vertical">
<TextView
style="@style/primaryHour"
android:text="@string/one_am"
android:layout_marginTop="40dp" />
<TextView
style="@style/primaryHour"
android:text="@string/two_am"/>
<TextView
style="@style/primaryHour"
android:text="@string/three_am"/>
<TextView
style="@style/primaryHour"
android:text="@string/four_am"/>
<TextView
style="@style/primaryHour"
android:text="@string/five_am"/>
<TextView
style="@style/primaryHour"
android:text="@string/six_am"/>
<TextView
style="@style/primaryHour"
android:text="@string/seven_am"/>
<TextView
style="@style/primaryHour"
android:text="@string/eight_am"/>
<TextView
style="@style/primaryHour"
android:text="@string/nine_am"/>
<TextView
style="@style/primaryHour"
android:text="@string/ten_am"/>
<TextView
style="@style/primaryHour"
android:text="@string/eleven_am"/>
<TextView
style="@style/primaryHour"
android:text="@string/twelve_pm"/>
<TextView
style="@style/primaryHour"
android:text="@string/one_pm"/>
<TextView
style="@style/primaryHour"
android:text="@string/two_pm"/>
<TextView
style="@style/primaryHour"
android:text="@string/three_pm"/>
<TextView
style="@style/primaryHour"
android:text="@string/four_pm"/>
<TextView
style="@style/primaryHour"
android:text="@string/five_pm"/>
<TextView
style="@style/primaryHour"
android:text="@string/six_pm"/>
<TextView
style="@style/primaryHour"
android:text="@string/seven_pm"/>
<TextView
style="@style/primaryHour"
android:text="@string/eight_pm"/>
<TextView
style="@style/primaryHour"
android:text="@string/nine_pm"/>
<TextView
style="@style/primaryHour"
android:text="@string/ten_pm"/>
<TextView
style="@style/primaryHour"
android:text="@string/eleven_pm"
android:layout_marginBottom="40dp"/>
</LinearLayout>
<!--This LinearLayout creates all the lines next to hours on main activity-->
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="5"
android:orientation="vertical"
android:id="@+id/timeBars">
<View
style="@style/primaryHourLines"
android:layout_marginTop="79dp">
</View>
<View
style="@style/primaryHourLines">
</View>
<View
style="@style/primaryHourLines">
</View>
<View
style="@style/primaryHourLines">
</View>
<View
style="@style/primaryHourLines">
</View>
<View
style="@style/primaryHourLines">
</View>
<View
style="@style/primaryHourLines">
</View>
<View
style="@style/primaryHourLines">
</View>
<View
style="@style/primaryHourLines">
</View>
<View
style="@style/primaryHourLines">
</View>
<View
style="@style/primaryHourLines">
</View>
<View
style="@style/primaryHourLines">
</View>
<View
style="@style/primaryHourLines">
</View>
<View
style="@style/primaryHourLines">
</View>
<View
style="@style/primaryHourLines">
</View>
<View
style="@style/primaryHourLines">
</View>
<View
style="@style/primaryHourLines">
</View>
<View
style="@style/primaryHourLines">
</View>
<View
style="@style/primaryHourLines">
</View>
<View
style="@style/primaryHourLines">
</View>
<View
style="@style/primaryHourLines">
</View>
<View
style="@style/primaryHourLines">
</View>
<View
style="@style/primaryHourLines"
android:layout_marginBottom="79dp">
</View>
</LinearLayout>
</LinearLayout>
</ScrollView>
DaySliderFragment（正确的功能代码）
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
ViewGroup rootView = (ViewGroup) inflater.inflate(
R.layout.single_day_content, container, false);
ViewPager viewPager = getActivity().findViewById(R.id.pager);
ArrayList<Button> viewsList = new ArrayList<Button>();
Button testBut = new Button(getContext());
//pageChangeListener to update
viewPager.addOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener(){
Boolean first = true;
//This method allows changes to occur on the first fragment which would not normally occur.
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
if (first && positionOffset == 0 && positionOffsetPixels == 0){
onPageSelected(0);
first = false;
}
}
@Override
public void onPageSelected(int position){
LinearLayout timeBars = (LinearLayout) rootView.findViewById(R.id.timeBars);
for(Button btn : viewsList) {
timeBars.removeView(btn);
}
for(Button btn : viewsList) {
viewsList.remove(btn);
}
timeBars.addView(testBut);
viewsList.add(testBut);
}
});
return rootView;
}
答案 0 :(得分：1)
一种更简单的方法可能是将TextViews添加到ArrayList
private ArrayList<View> viewsList = new ArrayList<View>();
viewsList.add(myTextView)
如果要以编程方式添加它们，则只需添加一行代码即可。
调用此函数以删除此ArrayList中的所有视图：
private void deleteViewsInList(ArrayList<View> viewsList) {
for(View view : viewsList) {
myLinearLayout.removeView(View view);
}
}
答案 1 :(得分：0)
哪一个linearlayout是父布局，而总体上来说，如果要删除父布局中的所有子布局（真实或线性），则可以得到参考并使用removeAllViews() check this link