无法从nativeInterface访问com.codename1.impl.android.AndroidNativeUtil

无法访问com.codename1.impl.android.AndroidNativeUtil来自codenameone中的nativeInterface，因为此结构在CodenameOne.jar中不可用 . 我是否需要在classpath中导入任何其他jar？需要通过以下代码从本机界面访问codenameOne的活动：

private static Activity activity() {
    return com.codename1.impl.android.AndroidNativeUtil.getActivity();
}

但是我在部署时遇到了这个错误：

使用JDK Java编译器API进行编译 .

/tmp/build313004297852547361xxx/MyApplication/src/main/java/com/mycompany/myapp/MyNativeImpl.java:46: error: cannot find symbol
private static Activity activity() {
               ^

 symbol:   class Activity

location：class MyNativeImpl /tmp/build313004297852547361xxx/MyApplication/src/main/java/com/codename1/impl/android/AndroidImplementation.java:4684：error：找不到符号if（android.support.v4.content.ContextCompat.checkSelfPermission（ activity，^ symbol：方法checkSelfPermission（CodenameOneActivity，String）location：类ContextCompat /tmp/build313004297852547361xxx/MyApplication/src/main/java/com/codename1/impl/android/AndroidImplementation.java:7117：错误：找不到符号if（ android.support.v4.content.ContextCompat.checkSelfPermission（activity，^ symbol：method checkSelfPermission（CodenameOneActivity，String）location：class ContextCompat / tmp / build313004297852547361xxx / MyApplication / src / main / java / com / codename1 / impl / android / AndroidImplementation .java：7122：错误：找不到符号if（！forceAsk && android.support.v4.app.ActivityCompat.shouldShowRequestPermissionRationale（activity，^ symbol：method shouldShowRequestPermissionRationale（CodenameOneActivity，String）location： class ActivityCompat /tmp/build313004297852547361xxx/MyApplication/src/main/java/com/codename1/impl/android/AndroidImplementation.java:7135：错误：找不到符号android.support.v4.app.ActivityCompat.requestPermissions（activity，^ symbol ：方法requestPermissions（CodenameOneActivity，String []，int）location：class ActivityCompat /tmp/build313004297852547361xxx/MyApplication/src/main/java/com/codename1/impl/android/AndroidImplementation.java:7152：错误：找不到符号返回android .support.v4.content.ContextCompat.checkSelfPermission（activity，^ symbol：method checkSelfPermission（CodenameOneActivity，String）location：class ContextCompat /tmp/build313004297852547361xxx/MyApplication/src/main/java/com/mycompany/myapp/MyNativeImpl.java: 56：错误：没有为Intent找到合适的构造函数（MyNativeImpl，Class）Intent intent = new Intent（这个，^构造函数Intent.Intent（String，Uri）不适用（参数不匹配; MyNativeImpl无法转换为String）构造函数Intent.Intent（Context，Class）不适用（参数不匹配; MyNativeImpl无法转换为Context）