这个程序教会你怎样开始写最简单的Android Activity-This class provides a basic demonstration of how to write an Android activity. Inside of its window, it places a single view: an EditText that displays and edits some internal text.

android 系统下一个关于软键盘的例子，有学习与参考价值。-the android system next example on the soft keyboard, learning and reference value.