我有以下簡單的服務器，在我的筆記本電腦上運行（Mac / Windows / Linux）：package mainimport ( "fmt" "log" "net/http")func handler(w http.ResponseWriter, r *http.Request) { fmt.Fprintf(w, "Hi there %s!", r.URL.Path[1:])}func main() { http.HandleFunc("/", handler) log.Println(http.ListenAndServe("localhost:6060", nil))}enter image description here我是否可以使用相同的代碼庫在移動設備上運行我的應用程序，而無需使用gomobile或其他軟件包，以便將我的代碼作為通用應用程序？webview
1 回答
一只斗牛犬
TA貢獻1784條經(jīng)驗 獲得超2個贊
答案是“是”，但需要對文件本身進行一些輕微的修改。
從 中刪除所有內容，因為我們會將最終結果構建為共享庫，而不是可執(zhí)行二進制文件。
func main() {}在函數(shù)中運行服務器。
//export從 as 運行服務器，以便它不會阻塞移動應用程序的主線程。
anonymous goroutinego func() {}()為了保持服務器戈魯丁的運行，我們需要使用一個通道來防止戈魯廷退出。
<-c通過添加 來使用，因此主文件將如下所示：
cgoimport "C"
package main
import "C"
// other imports should be seperated from the special Cgo import
import (
"fmt"
"log"
"net/http"
)
//export server
func server() {
c := make(chan bool)
go func() {
log.Println(http.ListenAndServe("localhost:6060", nil))
<-c
}()
http.HandleFunc("/", handler)
}
func handler(w http.ResponseWriter, r *http.Request) {
fmt.Fprintf(w, "Hi there %s!", r.URL.Path[1:])
}
func main() {}
確保安裝了安卓系統(tǒng)，并且您知道它的浴缸NDK
生成輸出名稱為 的輸出，以生成以供使用：c-sharedlibxxxAndroid
CGO_ENABLED=1 \
GOOS=android \
GOARCH=arm \
GOARM=7 \
CC=$(NDK_BIN)/armv7a-linux-androideabi21-clang \
go build -buildmode=c-shared -o libfoo.so http.go
等由于Android具有多個架構，我們需要單獨編譯每個架構，因此我們可以在創(chuàng)建Android應用程序后，通過從項目模板中進行選擇，在輸出庫名稱下方，所有過程都可以自動執(zhí)行，并且每個文件夾中將生成2個文件，并且：MakefileNative C++libfoolibfoo.solibfoo.h
enter image description here
#Filename: Makefile
# To compile run:
# make android
IOS_OUT=lib/ios
ANDROID_OUT=../android_app/app/src/main/jniLibs
ANDROID_SDK=$(HOME)/Library/Android/sdk
NDK_BIN=$(ANDROID_SDK)/ndk/23.0.7599858/toolchains/llvm/prebuilt/darwin-x86_64/bin
android-armv7a:
CGO_ENABLED=1 \
GOOS=android \
GOARCH=arm \
GOARM=7 \
CC=$(NDK_BIN)/armv7a-linux-androideabi21-clang \
go build -buildmode=c-shared -o $(ANDROID_OUT)/armeabi-v7a/libfoo.so ./cmd/libfoo
android-arm64:
CGO_ENABLED=1 \
GOOS=android \
GOARCH=arm64 \
CC=$(NDK_BIN)/aarch64-linux-android21-clang \
go build -buildmode=c-shared -o $(ANDROID_OUT)/arm64-v8a/libfoo.so ./cmd/libfoo
android-x86:
CGO_ENABLED=1 \
GOOS=android \
GOARCH=386 \
CC=$(NDK_BIN)/i686-linux-android21-clang \
go build -buildmode=c-shared -o $(ANDROID_OUT)/x86/libfoo.so ./cmd/libfoo
android-x86_64:
CGO_ENABLED=1 \
GOOS=android \
GOARCH=amd64 \
CC=$(NDK_BIN)/x86_64-linux-android21-clang \
go build -buildmode=c-shared -o $(ANDROID_OUT)/x86_64/libfoo.so ./cmd/libfoo
android: android-armv7a android-arm64 android-x86 android-x86_64
轉到并執(zhí)行以下操作：8.1。文件 ，將其設置為：android_app/app/src/main/cppCMakeLists.txt
cmake_minimum_required(VERSION 3.10.2)
project("android")
add_library( # Sets the name of the library.
native-lib
# Sets the library as a shared library.
SHARED
# Provides a relative path to your source file(s).
native-lib.cpp )
add_library(lib_foo SHARED IMPORTED)
set_property(TARGET lib_foo PROPERTY IMPORTED_NO_SONAME 1)
set_target_properties(lib_foo PROPERTIES IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/../jniLibs/${CMAKE_ANDROID_ARCH_ABI}/libfoo.so)
include_directories(${CMAKE_CURRENT_SOURCE_DIR}/../jniLibs/${CMAKE_ANDROID_ARCH_ABI}/)
find_library( # Sets the name of the path variable.
log-lib
# Specifies the name of the NDK library that
# you want CMake to locate.
log )
target_link_libraries( # Specifies the target library.
native-lib
lib_foo
# Links the target library to the log library
# included in the NDK.
${log-lib} )
8.2. 文件設置為：native-lib.cpp
#include <jni.h>
#include <string>
#include "libfoo.h" // our library header
extern "C" {
void
Java_tk_android_MainActivity_serverJNI() {
// Running the server
server();
}
}
將網(wǎng)頁視圖添加到 中，如下所示：layout/activity_main
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<WebView
android:id="@+id/wv"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:isScrollContainer="false"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
更新如下：MainActivity
package tk.android
import android.os.Bundle
import android.webkit.WebView
import android.webkit.WebViewClient
import androidx.appcompat.app.AppCompatActivity
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
var wv = findViewById<WebView>(R.id.web_view)
serverJNI()
wv.loadUrl("http://127.0.0.1:6060/")
wv.webViewClient = object : WebViewClient() {
override fun shouldOverrideUrlLoading(viewx: WebView, urlx: String): Boolean {
viewx.loadUrl(urlx)
return false
}
}
}
private external fun serverJNI(): Void
companion object {
// Used to load the 'native-lib' library on application startup.
init {
System.loadLibrary("native-lib")
}
}
}
更新為：AndroidManifest
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="tk.android">
<!-- Mandatory:
android:usesCleartextTraffic="true"
Optional:
android:hardwareAccelerated="true"
Depending on the action bar required:
android:theme="@style/Theme.AppCompat.NoActionBar"
-->
<application
android:hardwareAccelerated="true" // <- Optional
android:usesCleartextTraffic="true" // <- A must to be added
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/Theme.AppCompat.NoActionBar"> // <- If do not want action bar
<activity android:name=".MainActivity"
android:configChanges="orientation|screenSize"> // <- A must to avoid crashing at rotation
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
獎金使用 Go，所有靜態(tài)文件都可以嵌入到同一庫中，包括 、，因此您可以使用 GUI 構建 API 或完整的應用程序embedcssjavascripttemplates
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