{"id":27016,"date":"2024-07-23T12:43:41","date_gmt":"2024-07-23T04:43:41","guid":{"rendered":"https:\/\/www.yimenyun.cn\/emen\/?p=27016"},"modified":"2024-07-23T12:43:41","modified_gmt":"2024-07-23T04:43:41","slug":"%e4%b8%8a%e6%9e%b6%e5%ae%89%e5%8d%93%e5%8e%9f%e7%94%9f%e5%8c%85%e6%80%8e%e4%b9%88%e5%88%b6%e4%bd%9c%e7%9a%84","status":"publish","type":"post","link":"https:\/\/www.yimenyun.cn\/emen\/27016\/","title":{"rendered":"\u4e0a\u67b6\u5b89\u5353\u539f\u751f\u5305\u600e\u4e48\u5236\u4f5c\u7684?"},"content":{"rendered":"

\u5b89\u5353\u539f\u751f\u5305\u662f\u4e00\u79cd\u53ef\u4ee5\u5728\u5b89\u5353\u5e94\u7528\u4e2d\u4f7f\u7528C\/C++\u4ee3\u7801\u7684\u65b9\u5f0f\u3002\u5b83\u5141\u8bb8\u82f9\u679c\u4e2a\u4eba\u5f00\u53d1\u8005\u8d26\u53f7<\/a>\u5f00\u53d1\u8005\u4f7f\u7528C\/C++\u7f16\u5199\u9ad8\u6027\u80fd\u7684\u4ee3\u7801\uff0c\u540c\u65f6\u4e0eJava\u4ee3\u7801\u76f8\u4e92\u4ea4\u4e92\u3002\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u4f7f\u7528\u539f\u751f\u5305\u53ef\u4ee5\u63d0\u9ad8\u5e94\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u548c\u7a33\u5b9a\u6027\u3002\u672c\u6587\u5c06\u4ecb\u7ecd\u5982\u4f55\u5c06\u5b89\u5353\u539f\u751f\u5305\u6dfb\u52a0\u5230\u60a8\u7684\u5e94\u7528\u7a0b\u5e8f\u4e2d<\/p>\n

<\/figure>\n<\/p>\n

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1. \u5c06\u539f\u751f\u5e93\u6dfb\u52a0\u5230\u60a8\u7684\u5e94\u7528\u7a0b\u5e8f\u9879\u76ee\u4e2d\u3002<\/p>\n

2. \u5728\u60a8\u7684Java\u4ee3\u7801\u4e2d\uff0c\u4f7f\u7528System.loadLibrary()\u65b9\u6cd5\u6765\u52a0\u8f7d\u539f\u751f\u5e93\u3002<\/p>\n

\u4f8b\u5982\uff0c\u4ee5\u4e0b\u4ee3\u7801\u5c06\u52a0\u8f7d\u540d\u4e3a\u201cnative-lib\u201d\u7684\u539f\u751f\u5e93\uff1a<\/p>\n

“`java<\/p>\n

static {<\/p>\n

System.loadLibrary(“native-lib”);<\/p>\n

}<\/p>\n

“`<\/p>\n

3. \u5728\u60a8\u7684Java\u4ee3\u7801\u4e2d\uff0c\u4f7f\u7528native\u5173\u952e\u5b57\u6765\u58f0\u660e\u4e00\u4e2a\u672c\u5730\u65b9\u6cd5\u3002<\/p>\n

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“`java<\/p>\n

public native String stringFromJNI();<\/p>\n

“`<\/p>\n

4. \u5728\u60a8\u7684C\/C++\u6e90\u4ee3\u7801\u4e2d\uff0c\u5b9e\u73b0\u672c\u5730\u65b9\u6cd5\u3002<\/p>\n

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“`c++<\/p>\n

JNIEXPORT jstring JNICALL<\/p>\n

Java_com_example_myapplication_MainActivity_stringFromJNI(JNIEnv *env, jobject \/* this *\/) {<\/p>\n

std::string hello = “Hello from C++”;<\/p>\n

return env->NewStringUTF(hello.c_str());<\/p>\n

}<\/p>\n

“`<\/p>\n

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5. \u4f7f\u7528Java\u4ee3\u7801\u8c03\u7528\u672c\u5730\u65b9\u6cd5\u3002<\/p>\n

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“`java<\/p>\n

TextView tv = findViewById(R.id.sample_text);<\/p>\n

tv.setText(stringFromJNI());<\/p>\n

“`<\/p>\n

\u4e09\u3001\u7ed3\u8bba<\/p>\n

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