资 源 简 介
Read these tutorials to understand this code.
http://www.asbhtechsolutions.com/android-tutorial/11-start-new-activity-in-android
http://www.asbhtechsolutions.com/android-tutorial/10-android-textview
http://www.asbhtechsolutions.com/android-tutorial/9-android-edit-text
http://www.asbhtechsolutions.com/android-tutorial/8-android-button