我有一个简单的类写在Android Studio:
package com.mysite.myapp;
import org.apache.http.client.HttpClient;
public class Whatever {
public void headBangingAgainstTheWallExample () {
HttpClient client = new DefaultHttpClient();
}
}
从这里我得到了以下编译时错误:
无法解析HttpClient符号
HttpClient不是包含在Android Studio SDK中吗?即使不是,我也像这样把它添加到我的Gradle构建中:
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:appcompat-v7:23.0.0'
compile 'org.apache.httpcomponents:httpclient:4.5'
}
不管有没有最后一个编译行,错误都是一样的。我错过了什么?
你只需要加一行
useLibrary 'org.apache.http.legacy'
为构建。例如gradle(Module: app)
apply plugin: 'com.android.application'
android {
compileSdkVersion 24
buildToolsVersion "25.0.0"
useLibrary 'org.apache.http.legacy'
defaultConfig {
applicationId "com.avenues.lib.testotpappnew"
minSdkVersion 15
targetSdkVersion 24
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
exclude group: 'com.android.support', module: 'support-annotations'
})
compile 'com.android.support:appcompat-v7:24.2.1'
testCompile 'junit:junit:4.12'
}
1-下载Apache jar文件(从这个答案开始)4.5.zip文件:
https://hc.apache.org/downloads.cgi?Preferred=http%3A%2F%2Fapache.arvixe.com%2F
2-打开zip复制jar文件到你的libs文件夹。你可以在你的项目顶部找到它,上面写着“Android”,当你点击它的时候,你会发现一个列表。所以,
Android ->项目->应用程序-> libs
,然后把罐子放在那里。
3-建造中。gradle(模块:app
compile fileTree(dir: 'libs', include: ['*.jar'])
in
dependency {
}
4-在java类中添加这些导入:
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.params.CoreProtocolPNames;