LinearLayout的addView不显示

Question

我一直在试图添加视图在我的LinearLayout谁的方向是HORIZONTAL。

This LinearLayout is in CoordinatorLayout，NestedScrollView and end HorizontalScrollView。这是结构 -

<?xml version="1.0" encoding="utf-8"?> 
<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/container" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent"> 

    <mycustom..FlingNestedScrollView 
     android:id="@+id/scroll_view" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:fillViewport="true" 
     android:overScrollMode="never" 
     android:scrollbars="none" 
     app:layout_behavior="@string/appbar_scrolling_view_behavior"> 

     <LinearLayout 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:layout_marginBottom="16dp" 
      android:orientation="vertical"> 

      . 
      . 
      . 
      <RelativeLayout 
       android:id="@+id/online_size" 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:paddingLeft="20dp" 
       android:paddingStart="20dp"> 

       <mycustom..FontTextView 
        android:id="@+id/lbl_available" 
        android:layout_width="match_parent" 
        android:layout_height="wrap_content" 
        android:layout_alignParentTop="true" 
        android:paddingBottom="20dp" 
        android:paddingTop="20dp" 
        android:text="@string/available_sizes" 
        android:textColor="?android:attr/textColorPrimaryInverse" 
        android:textSize="@dimen/product_detail_available_font_size" 
        app:customFont="@string/font_circular_medium" /> 

       <HorizontalScrollView 
        android:id="@+id/horizontal_view" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_below="@+id/lbl_available" 
        android:scrollbars="none"> 

        <LinearLayout 
         android:id="@+id/ll_sizes" 
         android:layout_width="match_parent" 
         android:layout_height="7dp" 
         android:orientation="horizontal" 
         android:paddingBottom="@dimen/product_detail_sizes_padding_bottom" /> 

       </HorizontalScrollView> 

      </RelativeLayout> 
      . 
      . 
      . 

     </LinearLayout> 
    </mycustom..FlingNestedScrollView> 

    <android.support.design.widget.AppBarLayout 
     android:id="@+id/app_bar_layout" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:background="@color/windowBackground" 
     android:fitsSystemWindows="true" 
     app:expanded="true"> 

     <android.support.design.widget.CollapsingToolbarLayout 
      android:id="@+id/collapsing_toolbar" 
      android:layout_width="match_parent" 
      android:layout_height="match_parent" 
      android:fitsSystemWindows="true" 
      app:contentScrim="?attr/colorPrimary" 
      app:expandedTitleMarginEnd="64dp" 
      app:expandedTitleMarginStart="48dp" 
      app:layout_scrollFlags="scroll|exitUntilCollapsed" 
      app:statusBarScrim="?attr/colorPrimaryDark"> 
      . 
      . 
      . 


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

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

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

在我Activity我用下面的代码，一旦我在我的UI线程获取数据 -

@BindView(R.id.online_size) View onlineSizes; 
@BindView(R.id.ll_sizes) LinearLayout llSizes; 

private void displaySizes() { 
     onlineSizes.setVisibility(View.VISIBLE); 
     if (llSizes.getChildCount() <= 0) { 
      for (int i = 0; i < mPresenter.getSizeArrayList().size(); i++) { 
       FontTextView label = (FontTextView) LayoutInflater.from(getActivityContext()).inflate(R.layout.listitem_label_size_element, null); 
       label.setText(mPresenter.getSizeArrayList().get(i)); 
       View view = LayoutInflater.from(getActivityContext()).inflate(R.layout.listitem_image_size_element, null); 
       llSizes.addView(label); 
       if (i != mPresenter.getSizeArrayList().size() - 1) 
        llSizes.addView(view); 
      } 
     } 
    } 

内部布局 listitem_label_size_element.xml

<?xml version="1.0" encoding="utf-8"?> 
<mycustom..FontTextView xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:app="http://schemas.android.com/apk/res-auto" 
    android:id="@+id/lbl_size" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_gravity="center_vertical" 
    android:layout_marginEnd="@dimen/product_detail_sizes_intermediate_padding_right" 
    android:layout_marginRight="@dimen/product_detail_sizes_intermediate_padding_right" 
    android:gravity="center_vertical" 
    android:textColor="?android:attr/textColorSecondary" 
    android:textSize="@dimen/product_detail_sizes_font_size" 
    app:customFont="@string/font_ss_regular" /> 

和listitem_image_size_element.xml是

<?xml version="1.0" encoding="utf-8"?> 
<ImageView xmlns:android="http://schemas.android.com/apk/res/android" 
    android:id="@+id/img_dot" 
    android:layout_width="5dp" 
    android:layout_height="5dp" 
    android:layout_gravity="center_vertical" 
    android:layout_marginEnd="@dimen/product_detail_sizes_intermediate_padding_right" 
    android:layout_marginRight="@dimen/product_detail_sizes_intermediate_padding_right" 
    android:adjustViewBounds="true" 
    android:gravity="center_vertical" 
    android:scaleType="fitXY" 
    android:src="@drawable/dot" /> 

获取数据后，我调试了代码并检查了llSizes有10 mChildCount但仍然没有显示。

PS：把它变成重复线程之前，我已经测试了以下东西 -

llSize.invalidate();

llSize.notify();

LayoutInflater.from(getActivityContext()).inflate(R.layout.listitem_label_size_element, llSizes, false);

LayoutInflater.from(getActivityContext()).inflate(R.layout.listitem_image_size_element, llSizes, false);

不停whol e方法displaySizes()到llSizes.postDelayed()延迟100毫秒。

现在除了这个，我不知道我错过了什么。

Answer 1

这是因为您已将布局高度设置为7dp。使其成为wrap_content并为其设置最小或最大高度，然后您即将离开。