Android-自定义按钮透明

我跟着这个 我的自定义按钮是透明的，下面是自定义按钮的xml代码，我可以构建，但应用程序会立即崩溃

埃克斯普林病毒是 Android.Views.InflateException:二进制XML文件第1行：膨胀类Android.widget.Button时出错

<selctor xmlns:android="http://schemas.android.com/apk/res/android">
  <item android:state_pressed="false">
    <layer-list>
      <item android:right="5dp" android:top="5dp">
        <corners  android:radius = "2dp"/>
        <solid android:color ="#BABABA"/>
      </item>

      <item android:bottom="2dp" android:left ="2dp">
        <shape>
          <gradient android:angle="270" android:endColor = "#4A6EA9" android:startColor ="#4A6EA9"/>
          <stroke android:width="1dp" android:color ="#D6D6D6"/>
          <corners android:radius="4dp" />
          <padding android:bottom="10dp" android:top="10dp" android:left="10dp" android:right="10dp"  />
        </shape>
      </item>
    </layer-list>
  </item>

  <item android:state_pressed="true">
    <layer-list>
      <item android:right="5dp" android:top="5dp">
        <corners  android:radius = "3dp"/>
        <solid android:color ="#4A6EA9"/>
      </item>

      <item android:bottom="2dp" android:left ="2dp">
        <shape>
          <gradient android:angle="270" android:endColor = "#4A6EA9" android:startColor ="#4A6EA9"/>
          <stroke android:width ="1dp" android:color ="#BABABA"/>
          <corners android:radius="5dp" />
          <padding android:bottom="10dp" android:top="10dp" android:left="10dp" android:right="10dp"/>
        </shape>
      </item>
    </layer-list>
  </item>
</selctor>

缺少形状标记：

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_pressed="false">
        <layer-list>
            <item android:right="5dp" android:top="5dp">
                <shape>
                <corners  android:radius = "2dp"/>
                <solid android:color ="#BABABA"/>
                </shape>
            </item>

            <item android:bottom="2dp" android:left ="2dp">
                <shape>
                    <gradient android:angle="270" android:endColor = "#4A6EA9" android:startColor ="#4A6EA9"/>
                    <stroke android:width="1dp" android:color ="#D6D6D6"/>
                    <corners android:radius="4dp" />
                    <padding android:bottom="10dp" android:top="10dp" android:left="10dp" android:right="10dp"  />
                </shape>
            </item>
        </layer-list>
    </item>

    <item android:state_pressed="true">
        <layer-list>
            <item android:right="5dp" android:top="5dp">
                <shape>
                <corners  android:radius = "3dp"/>
                <solid android:color ="#4A6EA9"/>
                </shape>
            </item>

            <item android:bottom="2dp" android:left ="2dp">
                <shape>
                    <gradient android:angle="270" android:endColor = "#4A6EA9" android:startColor ="#4A6EA9"/>
                    <stroke android:width ="1dp" android:color ="#BABABA"/>
                    <corners android:radius="5dp" />
                    <padding android:bottom="10dp" android:top="10dp" android:left="10dp" android:right="10dp"/>
                </shape>
            </item>
        </layer-list>
    </item>
</selector>

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logcat？？？/add stack trace..和相关java文件在哪里