JNI，调用方法布尔 [英] JNI , call boolean method

问题描述

我有一个Java方法得到一个字符串，返回布尔

我把它从JNI是这样的：

  jmethodID function2ID = env-＆GT;的GetMethodID（
                    activityClass，
                    MyFuncName
                    （Ljava /朗/字符串;）B）;
        如果（function2ID == NULL）
            LOG（找不到MyFuncName功能）            jboolean IsAutoPlay = env-＆GT; CallBooleanMethod（
                    OBJ，
                    function2ID，
                    env-＆GT; NewStringUTF（名））;
 

我得到致命信号11，
任何想法有什么错在语法？谢谢

答：
我的Java签名是返回布尔而不是布尔

也

  jmethodID function2ID = env-＆GT;的GetMethodID（
                    activityClass，
                    MyFuncName
                    （Ljava /朗/字符串;）B）;
 

需要为Z的而不是将b

  jmethodID function2ID = env-＆GT;的GetMethodID（
                    activityClass，
                    MyFuncName
                    （Ljava /朗/字符串;）Z）;
 

解决方案

我的Java签名是返回布尔而不是布尔

也
jmethodID function2ID = env->的GetMethodID（
                    activityClass，
                    MyFuncName
                    （Ljava /朗/字符串;）B）;
需要为Z的而不是将b

  jmethodID function2ID = env-＆GT;的GetMethodID（
                    activityClass，
                    MyFuncName
                    （Ljava /朗/字符串;）Z）;
 

i got a java method that get a string and return bool

i call it from jni like this:

jmethodID function2ID = env->GetMethodID(
                    activityClass,
                    "MyFuncName",
                    "(Ljava/lang/String;)B");
        if ( function2ID == null )
            LOG("Could not find MyFuncName Function")

            jboolean IsAutoPlay =    env->CallBooleanMethod(
                    obj,
                    function2ID,
                    env->NewStringUTF(name));

I get Fatal Signal 11, Any idea what's wrong in the syntax ? Thanks

Answer: My Java signature was to return Boolean instead of boolean

also

jmethodID function2ID = env->GetMethodID(
                    activityClass,
                    "MyFuncName",
                    "(Ljava/lang/String;)B");

need to be Z instead of B

jmethodID function2ID = env->GetMethodID(
                    activityClass,
                    "MyFuncName",
                    "(Ljava/lang/String;)Z");

解决方案

My Java signature was to return Boolean instead of boolean

also jmethodID function2ID = env->GetMethodID( activityClass, "MyFuncName", "(Ljava/lang/String;)B"); need to be Z instead of B

jmethodID function2ID = env->GetMethodID(
                    activityClass,
                    "MyFuncName",
                    "(Ljava/lang/String;)Z");

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