android 空指针调试

android错误调试

错误：
android 空指针调试
找到cause by
Caused by: java. lang NullPointerException: Attempt to invoke virtual method ’ android. text. Editable android. widget . EditText.getText() ’ on a null object reference
说明某个EditText对象没有定义

at com. example . shouxie. MainActivity. doclick (MainActivity. java:38)
这行双击，可以直接跳到38行的错误处

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