java.lang.RuntimeException: Unable to instantiate activity ComponentInfo

技术标签: 异常  activity

写demo的时候遇到了这个运行时异常,一般遇到这种情况都是包名或者Activity名字写错了,参照了这篇博客 写错名字出的问题 尝试了这几种方法都不解决问题,苦寻良久,其实是因为文件缓存 解决办法 Clean一下项目,重新buid一次就好了。...

NullPointerException:... java.lang.String.equals(java.lang.Object)' on a null object reference空指标报错

a.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.frameview... file line #21: Attempt to invoke virtual method 'boolean java.lang.String.equals(java.lang.Object)' on

Android菜鸟写程序遇到的关于全局变量的问题

问题:全局变量btu和edit通过方法直接赋值时程序报 Unable to instantiate activity ComponentInfo(无法实例化活动) 解决:把全局变量赋值放到方法内 解释:?

Android Studio报错:Didn‘t find class “XXXActivity“ on path

运行项目的时候报错: java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.bj.xw...地方,是因为注册Activity路径写错了,修改一下就好

Android studio 报错E/AndroidRuntime: FATAL EXCEPTION: main

初学安卓开发时候运行模拟器遇到报错不会怎么查看报错,在报错大串红色字体中看到特别句蓝色这层,以为这个错误就是在这个文件夹中 点击跳转到这个文件夹,他跳到了句 以为就是这写错了... java.lang.RuntimeException: Unable to start activity ComponentInfo{com.gx.hotel/com.gx.hotel.ui.RegisterActivity

Android开发之IllegalStateException: You need to use a Theme.AppCompat theme解决方法

Android开发之 问题: Process: cn.manager.iot.iotmanager, PID: 31617 java.lang.RuntimeException: Unable to...: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity


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Android Studio 真机调试出现 Unable to instantiate activity ComponentInfo的解决方案

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