Android Studio need to rebuild project before each run

Question

Recently the android studio shows Error Java cannot find Symbol or each run. i have to go to built and rebuilt the project before each run. Is there any way to fix it? i do

Answer 1

In my case, I had changed the sourceSets:

android {
    sourceSets {
        main {
            res.srcDirs =
                    [
                            'src/main/res',
                            'src/main/res/layouts',
                            'src/main/res/layouts/content',
                            'src/main/res/layouts/layout',
                            'src/main/res/layouts/fragment',
                            'src/main/res/layouts/dialog',
                            'src/main/res/layouts/appbar',
                    ]
        }
    }
}

and locate some *.xml to layouts/layout directory...

finally I got the problem, don't place file in layouts/layout directory, so I created an activity directory and cut that files to activity directory, and finally edit the gradle this way:

android {
    sourceSets {
        main {
            res.srcDirs =
                    [
                            'src/main/res',
                            'src/main/res/layouts',
                            'src/main/res/layouts/activity',
                            'src/main/res/layouts/content',
                            'src/main/res/layouts/layout',
                            'src/main/res/layouts/fragment',
                            'src/main/res/layouts/dialog',
                            'src/main/res/layouts/appbar',
                    ]
        }
    }
}