Question

我有以下ListView项： enter image description here

目前一切都按预期工作，除了TextView（2）的宽度外，它应放在应有的位置。

由于我将RelativeLayout与一些wrap_contents一起使用，因此我使用onGlobalLayoutListener，因此我可以在View完成加载和渲染时访问MeasuredWidths和Heights。使用TextView2但是当我调试时，我得到了一些奇怪的结果。

第一次调用onGlobalLayout时，TextView2的measuredWidth应该是（375 px）。第二次，它是48 px（与高度相同），当我查看TextView2的字段时，它说：mMeasuredHeight: 375; mMeasuredWidth: 48：S

我的布局位于这篇文章的底部。我的onGlobalLayoutListener是：

if(view.getViewTreeObserver().isAlive()){
    view.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
        // This will be called once the layout is finished, prior to displaying it
        // So we can change some widths and heights based on other View-Elements that are filled now
        // (We couldn't do this in the XML itself since they weren't filled yet and we didn't knew the sizes yet.)
        @Override
        public void onGlobalLayout() {
            if(holder != null){
                ...

                // Change the height of the ProductName-TextView to match the Image and leave the width as is
                int height = h.imageView.getMeasuredHeight();
                int width = h.tvName.getMeasuredWidth();
           *    h.tvName.setLayoutParams(new RelativeLayout.LayoutParams(h.imageView.getMeasuredHeight(), h.tvName.getMeasuredWidth()));

                ...
            }

            // Since we don't want onGlobalLayout to continue forever, we remove the Listener here again.
            view.getViewTreeObserver().removeOnGlobalLayoutListener(this);
        }
    });
}

*是一个断点。第一次宽度为48，高度为375.第二次宽度为48，高度为48，如果我查看holder.textView2中的mMeasuredHeight和mMeasuredWidth字段，则h = 375，w = 48：S < / p>

这是我的布局：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/item_layout"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:descendantFocusability="blocksDescendants">

    <LinearLayout
        android:id="@+id/left_ll"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:layout_alignParentLeft="true"
        android:layout_marginTop="@dimen/default_margin"
        android:layout_marginLeft="@dimen/default_margin"
        android:layout_marginBottom="@dimen/default_margin">

        <ImageView
            android:id="@+id/image"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:adjustViewBounds="true"
            android:background="@layout/transparent_background"
            android:contentDescription="@string/checkbox_content_description"
            android:src="@drawable/checkbox_unchecked" />

        <Space
            android:id="@+id/filler_space_image"
            android:layout_width="1dp"
            android:layout_height="1dp"
            android:visibility="gone" />

    </LinearLayout>

    <TextView
        android:id="@+id/tv_product_name"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_toRightOf="@id/left_ll"
        android:layout_toLeftOf="@+id/right_ll"
        android:ellipsize="end"
        android:singleLine="true"
        android:gravity="center_vertical"
        android:layout_marginTop="@dimen/default_margin"
        android:layout_marginLeft="@dimen/default_margin"
        android:layout_marginBottom="@dimen/default_margin" />

    <EditText
        android:id="@+id/et_result_amount"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/tv_product_name"
        android:layout_toRightOf="@id/left_ll"
        android:inputType="number"
        android:layout_marginLeft="@dimen/default_margin"
        android:layout_marginBottom="@dimen/default_margin"
        android:visibility="gone" />

    <AutoCompleteTextView
        android:id="@+id/actv_result_name"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_toLeftOf="@id/right_ll"
        android:layout_toRightOf="@id/et_result_amount"
        android:layout_below="@+id/tv_product_name"
        android:ellipsize="end"
        android:inputType="text"
        android:singleLine="true"
        android:visibility="gone" />

    <TextView
        android:id="@+id/tv_tags"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/et_result_amount"
        android:layout_toRightOf="@id/left_ll"
        android:text="@string/tags"
        android:gravity="center"
        android:layout_marginLeft="@dimen/default_margin"
        android:layout_marginBottom="@dimen/default_margin"
        android:visibility="gone" />

    <Spinner
        android:id="@+id/sp_tags"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/actv_result_name"
        android:layout_toRightOf="@id/tv_tags"
        android:layout_toLeftOf="@id/right_ll"
        android:layout_marginLeft="@dimen/default_margin"
        android:layout_marginBottom="@dimen/default_margin"
        android:visibility="gone" />

    <LinearLayout
        android:id="@id/right_ll"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:orientation="vertical"
        android:layout_margin="@dimen/default_margin">

        <TextView
            android:id="@+id/tv_price"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:gravity="center_vertical" />

        <Space
            android:id="@+id/filler_space_price"
            android:layout_width="1dp"
            android:layout_height="1dp"
            android:visibility="gone" />

        <ImageButton
            android:id="@+id/btn_tags"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:src="@android:drawable/ic_menu_manage"
            android:contentDescription="@string/button_tags_content_description"
            android:background="@layout/transparent_background"
            android:visibility="gone" />

    </LinearLayout>

</RelativeLayout>

Answer 1

好吧，它（在我弄清楚之后）非常明显......而不是

h.tvName.setLayoutParams(new RelativeLayout.LayoutParams(
    h.imageView.getMeasuredHeight(), h.tvName.getMeasuredWidth()));

我现在用

h.tvName.setLayoutParams(new RelativeLayout.LayoutParams(
    h.tvName.getMeasuredWidth(), hh.imageView.getMeasuredHeight()));

你问的区别？我使用LayoutParams(height, width)代替LayoutParams(width, height) ...

RelativeLayout在onGlobalLayout中更改高度并保留要填充的宽度

1 个答案: