在绑定RecyclerView上调整CardView的大小

Question

我想在RecyclerView中调整CardView的宽度，但是当我使用CardView.LayoutParams更改宽度时会抛出异常，有人帮助我吗？下面是代码：

list_item_calendar_hours.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

<TextView
    android:id="@+id/tvHour"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginBottom="16dp"
    android:layout_marginLeft="16dp"
    android:layout_marginRight="16dp"
    android:layout_marginTop="48dp"
    android:alpha="0.7"
    android:text="13:00"
    android:textColor="@color/black"
    android:textSize="12sp"
    android:textStyle="bold" />

<LinearLayout
    android:id="@+id/line"
    android:layout_width="match_parent"
    android:layout_height="1dip"
    android:layout_alignBottom="@+id/tvHour"
    android:layout_alignStart="@+id/tvHour"
    android:layout_marginBottom="6dp"
    android:layout_marginStart="46dp"
    android:alpha="0.12"
    android:background="@color/black"
    android:orientation="horizontal" />

<android.support.v7.widget.CardView                  
        xmlns:card_view="http://schemas.android.com/apk/res-auto"
        android:id="@+id/cv_app"
    android:layout_width="match_parent"
    android:layout_height="30dp"
    android:layout_alignStart="@+id/tvHour"
    android:layout_below="@+id/line"
    android:layout_marginBottom="4dp"
    android:layout_marginRight="6dp"
    android:layout_marginStart="46dp"
    android:visibility="gone"
    card_view:cardBackgroundColor="@color/green"
    card_view:cardCornerRadius="3dp"
    card_view:cardElevation="1dp">

    <TextView
        android:id="@+id/tv_description"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginLeft="4dp"
        android:padding="5dp"
        android:textColor="@color/white"
        android:textStyle="bold" />
</android.support.v7.widget.CardView>

</RelativeLayout>

RVAdapterAppointmentHours.java

@Override
public void onBindViewHolder(ViewHolder viewHolder, int position) {
    String hours = (String) mItemsData.get(position);
    viewHolder.tvHour.setText(hours);
    for (AppointmentModel model : mListAppointments) {
        int hour =    DateUtils.extractHour(DateUtils.stringToDate(model.getDate()));
        if (formatHour(hour).equals(hours)) {
            viewHolder.cvAppointment.setVisibility(View.VISIBLE);
            Log.i("ARTHUR", String.valueOf(viewHolder.line.getWidth()));
            viewHolder.tvDesc.setText(model.getMinutes());
            break;
        } else {
            viewHolder.cvAppointment.setVisibility(View.GONE);
            viewHolder.tvDesc.setText("");
        }
    }
}

异常

java.lang.ClassCastException: android.widget.RelativeLayout$LayoutParams   cannot be cast to android.widget.FrameLayout$LayoutParams

屏幕

Answer 1

嗯，错误是不言自明的：   <div class="vertical"> <div class="progress-bar"> <div class="progress-track"> <div class="progress-fill" style="height: 100%; top: 0%; background: rgb(191, 231, 178);"></div> <span style="color: rgb(0, 0, 0);">100%</span> </div> </div> <div class="progress-bar"> <div class="progress-track"> <div class="progress-fill" style="height: 80%; top: 20%; background: rgb(248, 231, 153);"></div> <span style="color: rgb(0, 0, 0);">80%</span> </div> </div> <div class="progress-bar"> <div class="progress-track"> <div class="progress-fill" style="height: 60%; top: 40%; background: rgb(248, 231, 153);"></div> <span style="color: rgb(0, 0, 0);">60%</span> </div> </div> <div class="progress-bar"> <div class="progress-track"> <div class="progress-fill" style="height: 2%; top: 98%; background: rgb(248, 138, 138);"> <span style="color: rgb(0, 0, 0);">0%</span> </div> </div> </div> </div>

您正在执行操作的视图属于java.lang.ClassCastException: android.widget.RelativeLayout$LayoutParams cannot be cast to android.widget.FrameLayout$LayoutParams，您尝试以RelativeLayout

的形式访问该视图