Starting: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] cmp=com.

Error while executing: am start -n "com.pgz.main/com.pgz.main.MainActivity" -a android.intent.action.MAIN -c android.intent.category.LAUNCHER
Starting: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] cmp=com.pgz.main/.MainActivity }
Error type 3
Error: Activity class {com.pgz.main/com.pgz.main.MainActivity} does not exist.

Error while Launching activity

Session 'app': Error Launching activity

APP可能还在后台运行。

解决方法：

1.file——setting——build，execution——install run 取消勾选

2.卸载APP，重新运行。

3.同步gradle