在此行发现多个注释：-错误：在包'android'中找不到属性'layout_alignBaseLine'的资源标识符

Question

Here is my .xml code it says "Multiple annotations found at this line: - error: No resource identifier found for attribute 'layout_alignBaseLine' in package 'android'". I don't know why this problem occurred. Someone help me.

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.relativelayout.MainActivity" >

<TextView
    android:id="@+id/textView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignBaseLine="@+id/button1"
    />

<EditText
    android:id="@+id/editText1"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_alignBaseLine="@+id/button1"
    android:layout_toLeftOf="@+id/textView1"
    android:layout_toStartOf="@+id/texView1"
    android:layout_toRightOf="@+id/button1"
    android:layout_toEndOf="@+id/button1"
    />

<Button
    android:id="@+id/button1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"      
    android:text="Button"
    android:layout_alignParentRight="true" 
    android:layout_alignParentTop="true" 
    android:layout_alignParentEnd="true"/>

 </RelativeLayout>

My Screen

Answer 1

应该有layout_alignBaseline而不是layout_alignBaseLine第二个l字母应该是小写