listview滚动后item高度总是不停变化

Question

这个是listview的item布局，当在list中滚动时，每个item的高度会随机变化，导致显示混乱，多滚动几次高度又显示正常了，怎么回事呢？
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:background="#ffffff"
    android:padding="6dp">
    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical" 
        android:gravity="center_horizontal">
        <TextView
            android:id="@+id/msgin_sendtime"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="2015-01-01 12:00:00"
            style="@style/chat_text_date_style"/>
    </LinearLayout>
    
    <LinearLayout 
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        >
         <!-- 2017.12.27.zhaoyudan.start -->
       <TextView
            android:id="@+id/showId"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="50dp"
            android:clickable="false"
            android:focusable="false"
            android:gravity="left|center"
            android:text="46040928"
            android:textColor="#000000"
            android:textSize="10sp"
            />        
            <!-- 2017.12.27.zhaoyudan.end -->
    </LinearLayout>     <RelativeLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:descendantFocusability="blocksDescendants"
        android:layout_marginTop="5dp" >
                     <ImageView
            android:id="@+id/msgout_userhead"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentRight="true"
            android:layout_alignParentTop="true"
            android:background="@drawable/message_person"
            android:focusable="false" />         <TextView
            android:id="@+id/msgout_chatcontent"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginRight="10dp"
            android:layout_toLeftOf="@id/msgout_userhead"
            android:background
            
            ="@drawable/message_own"
            android:clickable="true"
            android:focusable="true"
            android:gravity="left|center"
            android:lineSpacingExtra="2dp"
            android:maxWidth="200dp"
            android:minHeight="50dp"
            android:textColor="#ffffff"
            android:textSize="15sp" />         <ImageView
            android:id="@+id/msgout_sendState"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerVertical="true"
            android:layout_marginRight="10dp"
            android:layout_toLeftOf="@id/msgout_chatcontent"
            android:src="@drawable/message_sending" />

                <TextView
            android:id="@+id/msgin_chatcontent"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="10dp"
            android:layout_toRightOf="@+id/msgin_userhead"
            android:background="@drawable/message_adverse"
            android:clickable="true"
            android:focusable="true"
            android:gravity="left|center"
            android:lineSpacingExtra="2dp"
            android:maxWidth="200dp"
            android:minHeight="50dp"
            android:textColor="#000000"
            android:textSize="15sp" />         <ImageView
            android:id="@+id/msgin_userhead"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentTop="true"
            android:layout_toRightOf="@+id/msg_duoxuan"
            android:background="@drawable/message_person"
            android:focusable="false" />
 <!-- 2017.09.12赵宇丹修改 -->
      
        <CheckBox
            android:id="@+id/msg_duoxuan"
            android:layout_width="wrap_content"
            android:layout_height="60dp"
            android:layout_alignBaseline="@+id/msgin_chatcontent"
            android:layout_alignBottom="@+id/msgin_chatcontent"
            android:layout_alignParentLeft="true"
            android:layout_alignParentTop="true"
            android:visibility="gone"
            android:clickable="false"
                android:enabled="false"
            android:focusable="false"
            android:focusableInTouchMode="false" />  <!-- end -->
</RelativeLayout></LinearLayout>

Answer 1

不用fill_parent，换成wrap_contont