\u5b89\u5353APP\u5f00\u53d1<\/a>\u7a0b\u5e8f\u540d\u79f0\uff0c\u9009\u62e9\u9879\u76ee\u5b58\u50a8\u4f4d\u7f6e\u3002\u9009\u62e9\u9002\u5f53\u7684\u6700\u5c0fSDK\u7248\u672c\uff0c\u7136\u540e\u9009\u62e9”Empty Activity”\u4f5c\u4e3a\u9ed8\u8ba4Activity\u3002<\/p>\n\u56db\u3001\u914d\u7f6eCMake\u811a\u672c<\/p>\n
\u6211\u4eec\u5c06\u4f7f\u7528CMake\u6765\u6784\u5efaC\u4ee3\u7801\u3002\u9996\u5148\uff0c\u5728\u9879\u76ee\u7ed3\u6784\u4e0b\u521b\u5efa\u4e00\u4e2a\u65b0\u6587\u4ef6\u5939\u201capp\/src\/main\/cpp\u201d\u3002\u63a5\u4e0b\u6765\uff0c\u5728cpp\u6587\u4ef6\u5939\u4e2d\u521b\u5efa\u4e00\u4e2aCMakeLists.txt\u6587\u4ef6\uff0c\u5e76\u6dfb\u52a0\u4ee5\u4e0b\u5185\u5bb9\uff1a<\/p>\n
“`CMake<\/p>\n
cmake_minimum_required(VERSION 3.4.1)<\/p>\n
add_library( native-lib SHARED native-lib.c )<\/p>\n
find_library( log-lib log )<\/p>\n
target_link_libraries( native-lib ${log-lib} )<\/p>\n
“`<\/p>\n
\u4e94\u3001\u7f16\u5199native-lib.c\u4ee3\u7801<\/p>\n
\u5728cpp\u6587\u4ef6\u5939\u4e0b\uff0c\u521b\u5efa\u4e00\u4e2a\u540d\u4e3anative-lib.c\u7684\u6587\u4ef6\uff0c\u5e76\u5199\u5165\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/p>\n
“`C<\/p>\n
#include <\/p>\n
#include <\/p>\n
#include <\/p>\n
#define LOG_TAG “native-lib”<\/p>\n
#define LOGI(…) __android_log_print(ANDROID_LOG_INFO, LOG_TAG, __VA_ARGS__)<\/p>\n
JNIEXPORT jstring JNICALL<\/p>\n
Java_com_example_mycapp_MainActivity_stringFromC(JNIEnv *env, jobject thiz) {<\/p>\n
char hello[] = “Hello from C language!”;<\/p>\n
LOGI(“This log is from native C code”);<\/p>\n
return (*env)->NewStringUTF(env, hello);<\/p>\n
}<\/p>\n
“`<\/p>\n
\u516d\u3001\u914d\u7f6e\u6784\u5efa\u811a\u672c<\/p>\n
\u5728\u9879\u76ee\u7684\u201capp\/build.gradle\u201d\u6587\u4ef6\u4e2d\uff0c\u4fee\u6539\u5982\u4e0b\u90e8\u5206\uff0c\u52a0\u5165C\/C++\u7684\u652f\u6301\uff1a<\/p>\n
“`gradle<\/p>\n
android {<\/p>\n
…<\/p>\n
defaultConfig {<\/p>\n
…<\/p>\n
externalNativeBuild {<\/p>\n
cmake {<\/p>\n
cppFlags “”<\/p>\n
}<\/p>\n
}<\/p>\n
}<\/p>\n
buildTypes {<\/p>\n
…<\/p>\n
}<\/p>\n
externalNativeBuild {<\/p>\n
cmake {<\/p>\n
path “src\/main\/cpp\/CMakeLists.txt”<\/p>\n
version “3.10.2”<\/p>\n
}<\/p>\n
}<\/p>\n
}<\/p>\n
“`<\/p>\n
\u4e03\u3001\u4fee\u6539Java\u6587\u4ef6<\/p>\n
\u5bfc\u822a\u5230MainActivity.java\u6587\u4ef6\uff0c\u6dfb\u52a0\u5982\u4e0b\u4ee3\u7801\uff1a<\/p>\n
“`Java<\/p>\n
public class MainActivity extends AppCompatActivity {<\/p>\n
\/\/ Load the native library<\/p>\n
static {<\/p>\n
System.loadLibrary(“native-lib”);<\/p>\n
}<\/p>\n
\/\/Declare native method<\/p>\n
public native String stringFromC();<\/p>\n
@Override<\/p>\n
prote<\/p>\n
cted void onCreate(Bundle savedInstanceState) {<\/p>\n
super.onCreate(savedInstanceState);<\/p>\n
setContentView(R.layout.activity_main);<\/p>\n
TextView tv = findViewById(R.id.sample_text);<\/p>\n
tv.setText(stringFromC());<\/p>\n
}<\/p>\n
}<\/p>\n
“`<\/p>\n
\u516b\u3001\u8fd0\u884c\u9879\u76ee<\/p>\n
\u70b9\u51fb\u5b89\u5353app\u5236\u4f5c<\/a>Android Studio\u7684Run\u6309\u94ae\uff0c\u7b49\u5f85\u6784\u5efa\u5b8c\u6210\u5e76\u542f\u52a8\u5e94\u7528\u7a0b\u5e8f\u3002Android\u8bbe\u5907\u6216\u6a21\u62df\u5668\u4e0a\u5c06\u663e\u793a”Hello from C language!”\u6d88\u606f\u3002<\/p>\n\u901a\u8fc7\u4ee5\u4e0a\u6b65\u9aa4\uff0c\u6211\u4eec\u6f14\u793a\u4e86\u5982\u4f55\u4f7f\u7528C\u8bed\u8a00\u5f00\u53d1\u4e00\u4e2a\u7b80\u5355\u7684Android\u5e94\u7528\u7a0b\u5e8f\u3002\u8fd9\u53ea\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u4f8b\u5b50\uff0c\u4f60\u53ef\u4ee5\u901a\u8fc7\u719f\u6089NDK\u7684API\u548c\u529f\u80fd\uff0c\u7f16\u5199\u66f4\u590d\u6742\u7684\u672c\u5730\u4ee3\u7801\uff0c\u5e76\u5c06\u5176\u4e0eJava\u4ee3\u7801\u76f8\u4e92\u8c03\u7528\u5b9e\u73b0\u66f4\u5f3a\u5927\u7684\u529f\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
C\u8bed\u8a00\u5f00\u53d1Android App\u7a0b\u5e8f\u4f8b\u5b50\uff08\u539f\u7406\u4e0e\u8be6\u7ec6\u4ecb\u7ecd\uff09\u867d\u7136Android\u9ed8\u8ba4\u7684\u7f16\u7a0b\u8bed\u8a00\u662fJava\u548cKotlin\uff0c\u4f46\u53ef\u4ee5\u4f7f\u7528C\u8bed\u8a00\u5f00\u53d1Android\u5e94\u7528\u3002\u8fd9\u4e3b\u8981\u662f\u901a\u8fc7\u4f7f\u7528Android Nativ<\/p>\n","protected":false},"author":17,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[298,13452,13453,84,132],"topic":[],"class_list":{"0":"post-7441","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"hentry","6":"category-kaifaapp","7":"tag-298","8":"tag-app","10":"tag-84","11":"tag-132"},"_links":{"self":[{"href":"https:\/\/app.60day.cn\/appday\/wp-json\/wp\/v2\/posts\/7441","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/app.60day.cn\/appday\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/app.60day.cn\/appday\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/app.60day.cn\/appday\/wp-json\/wp\/v2\/users\/17"}],"replies":[{"embeddable":true,"href":"https:\/\/app.60day.cn\/appday\/wp-json\/wp\/v2\/comments?post=7441"}],"version-history":[{"count":0,"href":"https:\/\/app.60day.cn\/appday\/wp-json\/wp\/v2\/posts\/7441\/revisions"}],"wp:attachment":[{"href":"https:\/\/app.60day.cn\/appday\/wp-json\/wp\/v2\/media?parent=7441"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/app.60day.cn\/appday\/wp-json\/wp\/v2\/categories?post=7441"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/app.60day.cn\/appday\/wp-json\/wp\/v2\/tags?post=7441"},{"taxonomy":"topic","embeddable":true,"href":"https:\/\/app.60day.cn\/appday\/wp-json\/wp\/v2\/topic?post=7441"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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<\/figure>\n<\/p>\n