而最近在往ANDROID上放的時候,需要集成其它非官方運營渠道的API,而對方提供的API是jar包。所以需要在cocos2dx C++源文件中調用JAVA的API,因此有了以下DEMO代碼:
activity裏有如下定義:
- public void cppCall_nonStatic_logsth(){
- //非靜態方法
- Log.i("cppCall_nonStatic", "test2~~~~!!!");
- }
- public static Object cppCall_logsth(){
- //靜態方法
- Log.i("cppCall", "test~~~~!!!");
- return activity;
- }
public void cppCall_nonStatic_logsth(){
//非靜態方法
Log.i("cppCall_nonStatic", "test2~~~~!!!");
}
public static Object cppCall_logsth(){
//靜態方法
Log.i("cppCall", "test~~~~!!!");
return activity;
}
AppDelegate.cpp裏:
加上預定義(for android)
- #if (CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID)
- #include <jni.h>
- #include <JniHelper.h>
- #include <android/log.h>
- #if 1
- #define LOG_TAG "JniHelper"
- #define LOGD(...) __android_log_print(ANDROID_LOG_DEBUG,LOG_TAG,__VA_ARGS__)
- #else
- #define LOGD(...)
- #endif
- #endif
#if (CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID) #include <jni.h> #include <JniHelper.h> #include <android/log.h> #if 1 #define LOG_TAG "JniHelper" #define LOGD(...) __android_log_print(ANDROID_LOG_DEBUG,LOG_TAG,__VA_ARGS__) #else #define LOGD(...) #endif #endif
關鍵代碼片段:
- JniMethodInfo minfo;
- jobject jobj;
- bool b = JniHelper::getStaticMethodInfo(minfo,
- "com/loy/puzzles/Puzzles", //類路徑
- "cppCall_logsth", //靜態方法名
- "()Ljava/lang/Object;"); //括號裏的是參數,後面的是返回值。
- if (!b) {
- LOGD("JniHelper::getStaticMethodInfo error...");
- }else{
- jobj = minfo.env->CallStaticObjectMethod(minfo.classID, minfo.methodID);
- }
- JniHelper::getMethodInfo(minfo,
- "com/loy/puzzles/Puzzles",
- "cppCall_nonStatic_logsth",
- "()V");
- if(!b){
- LOGD("JniHelper::getMethodInfo error...");
- }else{
- LOGD("ready to invoke method...");
- minfo.env->CallVoidMethod(jobj, minfo.methodID);
- }
JniMethodInfo minfo; jobject jobj; bool b = JniHelper::getStaticMethodInfo(minfo, "com/loy/puzzles/Puzzles", //類路徑 "cppCall_logsth", //靜態方法名 "()Ljava/lang/Object;"); //括號裏的是參數,後面的是返回值。 if (!b) { LOGD("JniHelper::getStaticMethodInfo error..."); }else{ jobj = minfo.env->CallStaticObjectMethod(minfo.classID, minfo.methodID); } JniHelper::getMethodInfo(minfo, "com/loy/puzzles/Puzzles", "cppCall_nonStatic_logsth", "()V"); if(!b){ LOGD("JniHelper::getMethodInfo error..."); }else{ LOGD("ready to invoke method..."); minfo.env->CallVoidMethod(jobj, minfo.methodID); }
最終LOGCAT打印日誌如下:
12-29 12:46:33.891: D/JniHelper(2008): testing~~~
12-29 12:46:33.891: I/cppCall(2008): test~~~~!!!
12-29 12:46:33.891: D/JniHelper(2008): ready to invoke method...
12-29 12:46:33.891: I/cppCall_nonStatic(2008): test2~~~~!!!
12-29 12:46:33.891: D/JniHelper(2008): testing over~~~