技巧

• 1.填充文本： xmlns:tools="http://schemas.android.com/tools" tools:text=""
• 2.android键位设置NPAD
  

  <Key android:codes="21" android:keyLabel="left" />
  <Key android:codes="20" android:keyLabel="down" />
  <Key android:codes="22" android:keyLabel="right" />
  <Key android:codes="19" android:keyLabel="up" />
  <Row><!--特殊键值 法文-->
    <Key android:codes="0x00E4" android:keyEdgeFlags="left" android:keyLabel="ä"/>
    <Key android:codes="0x00F6" android:keyLabel="ö"/>
    <Key android:codes="0x00FC" android:keyLabel="ü"/>
    <Key android:codes="0x00DF" android:keyLabel="ß"/>
    <Key android:codes="0x00C4" android:keyLabel="Ä"/>
    <Key android:codes="0x00D6" android:keyLabel="Ö"/>
    <Key android:codes="0x00DC" android:keyLabel="Ü"/>
    <Key android:codes="0x006E" android:keyLabel="n"/>
    <Key android:codes="0x00B0" android:keyLabel="°"/>
    <Key android:codes="0x20AC" android:keyLabel="€"/>
    <Key android:codes="0x2026" android:keyLabel="…"/>
    <Key android:codes="0x201E" android:keyLabel="„"/>
    <Key android:codes="0x201C" android:keyEdgeFlags="right" android:keyLabel="“"/>
  </Row>