We tried to start an activity that doesn't exist, retrying with . prepended to activity

遇见这样的报错怎么办。。

我在模拟器上是可以的，app 我已经去掉了签名，机器没有 root，求大神给我一个方向

ERROR: debug: executing: "D:\adt-bundle-windows-x86_64-20140321\sdk\platform-tools\adb.exe" -s 524c4d8a shell "dumpsys window windows"
info: Getting focused package and activity