@UPDATE
Thank you very much. Now at least there are no errors. But it\'s still a far cry from how it worked before - how it should work. Now, the databa
I solve this question.i just change my gradle version from 2.2.3 to 2.2.2 classpath 'com.android.tools.build:gradle:2.2.2'
classpath 'com.android.tools.build:gradle:2.2.2'