LinearLayout的addView不显示

Question

我一直在尝试在我的 LinearLayout中添加视图谁的方向是 HORIZONTAL。

此LinearLayout在CoordinatorLayout，NestedScrollView和HorizontalScrollView中。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>

，在我的Activity中，我在UI线程中获取数据后使用以下代码 -

@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);
            }
        }
    }

内部布局是 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，我对代码进行了调试，并检查了llSizes的10 mChildCount，但仍未显示。

ps：将其放入重复线程之前，我已经测试了以下内容 -

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);

将整个方法displaySizes()放入llSizes.postDelayed()，并以100毫秒延迟。

现在，除此之外，我不确定我错过了什么。

Answer 1

这是因为您将布局高度设置为7dp。使其wrap_content并为其设置最小高度或最大高度。