easypermissions拒绝权限后闪退。 java.lang.NoSuchMethodError: No virtual method isStateSaved()Z in class Landroid/support/v4/app/FragmentManager

Process: com.tazan.cd.streetlight, PID: 18825
   java.lang.NoSuchMethodError: No virtual method isStateSaved()Z in class Landroid/support/v4/app/FragmentManager; or its super classes (declaration of 'android.support.v4.app.FragmentManager' appears in /data/app/com.tazan.cd.streetlight-sc-sX-rNCVNlO4qWt3BQkw==/base.apk:classes20.dex)
       at pub.devrel.easypermissions.RationaleDialogFragmentCompat.showAllowingStateLoss(RationaleDialogFragmentCompat.java:48)
       at pub.devrel.easypermissions.helper.BaseSupportPermissionsHelper.showRequestPermissionRationale(BaseSupportPermissionsHelper.java:43)
       at pub.devrel.easypermissions.helper.PermissionHelper.requestPermissions(PermissionHelper.java:66)
       at pub.devrel.easypermissions.EasyPermissions.requestPermissions(EasyPermissions.java:148)
       at com.tazan.cd.streetlight.activity.MainActivity.requestCodeQRCodePermissions(MainActivity.java:615)
       at com.tazan.cd.streetlight.activity.MainActivity.onStart(MainActivity.java:553)
       at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1339)
       at android.app.Activity.performStart(Activity.java:7392)
       at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3157)
       at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3302)
       at android.app.ActivityThread.-wrap12(Unknown Source:0)
       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1891)
       at android.os.Handler.dispatchMessage(Handler.java:108)
       at android.os.Looper.loop(Looper.java:166)
       at android.app.ActivityThread.main(ActivityThread.java:7425)
       at java.lang.reflect.Method.invoke(Native Method)
       at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:245)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:921)

　　错误大致如上：

　　问题是 isStateSaved是在support 26版本后加入的，可以 compileSdkVersion改为27，并且将easypermissions更新到最新版2.0.1

　　或在app的build.gradle里加入下面一段代码统一android support库为27版本

　　

subprojects {
    afterEvaluate {project ->
        if (project.hasProperty("android")) {
            android {
                compileSdkVersion
                buildToolsVersion '27.0.3'
                defaultConfig {
                    targetSdkVersion
                }

            }
        }
    }
}