Unable to instantiate activity ComponentInfo
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出现以下错误: 这是不能实例类
java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{cn.edu.bztc.happyIdiom/cn.edu.bztc.happyIdiom.StudyActivity}: java.lang.ClassNotFoundException: Didn't find class "cn.edu.bztc.happyIdiom.StudyActivity" on path: /system/framework/android.test.runner.jar:/data/app/cn.edu.bztc.happyIdiom-1.apk
不能实例化activity有如下二种情况:
1.没有在Manifest.xml 清单中注册该activity,或者在创建完activity后,修改了包名或者activity的类名,而配置清单中没有修改,造成不能实例化
2.自己新建一个包,而配置的时候,使用默认包。
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