Android Question Method: setCustomDensity not matched.

Logger connected to:  HUAWEI BLN-AL30
--------- beginning of main
*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
Error occurred on line: 56 (Main)
java.lang.RuntimeException: Method: setCustomDensity not matched.
    at anywheresoftware.b4j.object.JavaObject.RunMethod(JavaObject.java:129)
    at wzq.water.watercal.main._activity_create(main.java:412)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:732)
    at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:351)
    at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:255)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:144)
    at wzq.water.watercal.main.afterFirstLayout(main.java:112)
    at wzq.water.watercal.main.access$000(main.java:25)
    at wzq.water.watercal.main$WaitForLayout.run(main.java:90)
    at android.os.Handler.handleCallback(Handler.java:761)
    at android.os.Handler.dispatchMessage(Handler.java:98)
    at android.os.Looper.loop(Looper.java:156)
    at android.app.ActivityThread.main(ActivityThread.java:6523)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:942)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:832)
** Activity (main) Resume **