Android底部表单行为无法正常工作.视图在首次运行时不显示

Question

美好的一天,我有一个支持底部表格行为的应用程序.无论我尝试过什么,底部工作表将不会在第一次初始显示时显示其中的元素.第二次相同的代码触发,底部工作表显示元素这两种情况都发生了:动态添加视图和列表视图.这是我为底层构建的xml.

<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">

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


    <fragment xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:map="http://schemas.android.com/apk/res-auto"
        xmlns:tools="http://schemas.android.com/tools"
        android:id="@+id/map"
        android:name="com.google.android.gms.maps.SupportMapFragment"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:context="brijhelpline.testproject.MapsActivity" />

    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="100dp"
        android:alpha="0.9"
        android:background="@drawable/gradient">

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent">

            <ProgressBar
                android:id="@+id/progressBar"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignParentRight="true"
                android:layout_below="@+id/settings"
                android:indeterminate="false"
                android:visibility="gone" />

            <ImageView
                android:id="@+id/userIcon"
                android:layout_width="38dp"
                android:layout_height="38dp"
                android:layout_alignParentLeft="true"
                android:layout_marginTop="13dp"
                android:background="@drawable/user" />

            <ImageView
                android:id="@+id/settings"
                android:layout_width="38dp"
                android:layout_height="38dp"
                android:layout_alignParentRight="true"
                android:layout_marginRight="3dp"
                android:layout_marginTop="10dp"
                android:background="@drawable/settings_icon" />

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_centerHorizontal="true"
                android:layout_marginTop="20dp"
                android:text="Fuel Buddy"
                android:textColor="#ffffff"
                android:textSize="20sp" />
        </RelativeLayout>
    </android.support.v7.widget.Toolbar>

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/toolbar"
        android:layout_marginLeft="16dp"
        android:layout_marginRight="16dp"
        android:background="@drawable/searc_layout">

        <ImageView
            android:id="@+id/marker"
            android:layout_width="20dp"
            android:layout_height="30dp"
            android:layout_alignParentLeft="true"
            android:layout_margin="10dp"
            android:background="@drawable/marker_icon" />

        <ImageView
            android:id="@+id/add"
            android:layout_width="25dp"
            android:layout_height="26dp"
            android:layout_alignParentRight="true"
            android:layout_margin="10dp"
            android:background="@drawable/add_icon" />

        <EditText
            android:id="@+id/inputStation"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_centerInParent="true"
            android:layout_toLeftOf="@+id/add"
            android:layout_toRightOf="@+id/marker"
            android:hint="????? ????????"
            android:maxLines="1" />
    </RelativeLayout>


</RelativeLayout>

<android.support.v4.widget.NestedScrollView
    android:id="@+id/bottom_sheet"
    android:layout_width="match_parent"
    android:layout_height="300dp"
    android:layout_alignParentBottom="true"
    android:layout_alignParentLeft="true"
    android:layout_alignParentStart="true"
    android:background="@android:color/white"
    android:clipToPadding="true"
    app:layout_behavior="android.support.design.widget.BottomSheetBehavior">

    <LinearLayout
        android:id="@+id/layoutToAdd"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

    </LinearLayout>
    <!--<ListView-->
    <!--android:id="@+id/listView"-->
    <!--android:layout_width="match_parent"-->
    <!--android:layout_height="match_parent"></ListView>-->
</android.support.v4.widget.NestedScrollView>

正如您所看到的那样,listview被提交,所以我尝试了各种可能的方法,甚至用RELATIVELAYOUT或者什么来替换NESTEDSCROLLVIEW.这里是实际为linearLayout添加视图的代码.

     for (int i = 0; i < loopContent; i++) {
                    String address = addresses.get(i).getAddressLine(0); // If any additional address line present than only, check with max available address lines by getMaxAddressLineIndex()
                    String city = addresses.get(i).getLocality();
                    String state = addresses.get(i).getAdminArea();
                    String country = addresses.get(i).getCountryName();
                    String postalCode = addresses.get(i).getPostalCode();
                    String knownName = addresses.get(i).getFeatureName(); // Only if available else return NULL
                    if (knownName.equals("null") || knownName.toString().isEmpty()) {
                        knownName = "???? ??????????";
                    }
                    if (address != null) {
                        if (address.toString().isEmpty() || address.equals("null")) {
                            address = "???? ??????????";
                        }
                    } else {
                        address = "???? ??????????";
                    }
//                    holder = new Holder(knownName, address);
//                    holderArrayList.add(holder);
//                    adapter.notifyDataSetChanged();

                    LayoutInflater inflater = LayoutInflater.from(getApplicationContext());
                    View inflatedLayout = inflater.inflate(R.layout.single_item, null, false);
                    TextView header = (TextView) inflatedLayout.findViewById(R.id.header);
                    TextView street = (TextView) inflatedLayout.findViewById(R.id.second);
                    header.setText(knownName);
                    street.setText(address);
                    layoutToAdd.addView(inflatedLayout);
                }
                progressBar.setVisibility(View.GONE)
mBottomSheetBehavior.setState(BottomSheetBehavior.STATE_EXPANDED);

我完全不知道什么是问题以及该如何处理......我真的很烦我,所以如果有人能帮助我,我会非常感激.

Answer 1

到目前为止,我发现这是谷歌的一个错误,同时我找到了一个解决方法.无论何时你想进行实际的节目设置,无论是折叠还是扩展,只需发布​​一个新的runnable并进行如下设置:

  bottomSheet.post(new Runnable() {
                    @Override
                    public void run() {
                        mBottomSheetBehavior.setPeekHeight(200);
                        mBottomSheetBehavior.setState(BottomSheetBehavior.STATE_COLLAPSED);
                    }
                });