从我的c代码中，我想访问我的字段tasttrigger的值：

public class ApplicationConfigs {

    public enum TaskTrigger {
        QUEUED, TIMED;

        private final int value;
        private TaskTrigger() {
            this.value = ordinal();
        }

        public int getValue() {
            return value;
        }

        public static TaskTrigger fromValue(int value)
                throws IllegalArgumentException {
            try {
                return TaskTrigger.values()[value];
            } catch(ArrayIndexOutOfBoundsException e) {
                throw new IllegalArgumentException("Unknown enum value :"+ value);
            }
        }
    }

    private int applicationId;
    private TaskTrigger taskTrigger;
...

我的jni代码崩溃了，没有给我太多关于我做错了什么的提示。第一行代码正常工作以检索applicationid。获取tasktrigger对应的int值缺少什么？

JNIEXPORT jlong JNICALL Java_com_example_e2e_MainActivity_run(
        JNIEnv *env, jobject callingObject,
        jobject app1Configs) {

    jclass cls = env->GetObjectClass(app1Configs);

    app1ConfigsC.application_id = env->GetIntField(app1Configs, env->GetFieldID(cls, "applicationId", "I"));  // works just fine

    jmethodID triggerMethod = (env)->GetMethodID( (env)->FindClass(
            "com/example/e2e/ApplicationConfigs$TaskTrigger"), "getValue", "()I");

    jfieldID fieldId = env->GetFieldID(cls, "taskTrigger", "Lcom/example/e2e/ApplicationConfigs/TaskTrigger;");

    jobject objField = env->GetObjectField (app1Configs, fieldId);

    jint value = (env)->CallIntMethod(objField,triggerMethod);

更新
我对每个返回值进行了null测试，fieldid为null。我也试过了

jfieldID fieldId = env->GetFieldID(cls, "taskTrigger", "()com/example/e2e/ApplicationConfigs$TaskTrigger;");

但仍然返回空值。