DSP

ndk中日志,调试及故障处理

2019-07-13 19:14发布

站内文章 / DSP
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下面来一个实际例子   android.mk LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) LOCAL_MODULE := myNativeLib LOCAL_SRC_FILES :=test_com_myndk2_NdkUtils.cpp LOCAL_LDLIBS :=-llog include $(BUILD_SHARED_LIBRARY)
cpp #include "test_com_myndk2_NdkUtils.h" #include #include #include #include #define LOG_TAG "hb-4" #define LOGI(...) __android_log_print(ANDROID_LOG_INFO, LOG_TAG, __VA_ARGS__) #define LOGE(...) __android_log_print(ANDROID_LOG_ERROR, LOG_TAG, __VA_ARGS__) JNIEXPORT jstring JNICALL Java_test_com_myndk2_NdkUtils_getNativeString (JNIEnv *env, jobject obj,jstring str) { LOGI("call getNativeString"); const char* cppStr=env->GetStringUTFChars(str,NULL); LOGI("STR=%s",cppStr); env->ReleaseStringUTFChars(str,cppStr); int var=55; LOGI("var=%d",var); return env->NewStringUTF("HelloFrom JNI!"); }输出日志 01-11 10:50:09.500 30119-30119/test.com.myndk2 I/hb-4: call getNativeString 01-11 10:50:09.500 30119-30119/test.com.myndk2 I/hb-4: STR=java to cpp 你妹的 01-11 10:50:09.500 30119-30119/test.com.myndk2 I/hb-4: var=55 01-11 10:50:09.500 30119-30119/test.com.myndk2 I/hb-4: ndk返回的字符串：HelloFrom JNI!
demo地址： http://download.csdn.net/detail/hb707934728/9734462

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