可能重复：
创建自定义 android 键盘布局
我开始开发自己的 ime，但我坚持使用 xml 文件。Eclipse 似乎无法找到 Keyboard、Row 和 Key 类。谁能告诉我如何解决这个问题或如何用 java 编写一个 ime 布局？如果此描述缺少信息，请随时告诉我。无论如何，首先感谢大家，它表明了这一点：
NOTE: This project contains Java compilation errors, which can cause rendering failures for custom views. Fix compilation problems first.
"" does not set the required layout_width attribute:
(1) Set to "wrap_content"
(2) Set to "match_parent"
"" does not set the required layout_height attribute:
(1) Set to "wrap_content"
如果我设置 layout_widht 属性，它会显示：
NOTE: This project contains Java compilation errors, which can cause rendering failures for custom views. Fix compilation problems first.
com.android.layoutlib.bridge.MockView cannot be cast to android.view.ViewGroup
Exception details are logged in Window > Show View > Error Log
The following classes could not be found:
- Keyboard (Fix Build Path, Edit XML)
- Row (Fix Build Path, Edit XML)