由于Apache的HTTP库已被弃用而不支持HttpURLConnection,我一直在尝试将遗留库添加到我的项目中.我添加了这条线

 useLibrary 'org.apache.http.legacy'

build.gradle但HTTP方法仍然无法解决.我如何让这个工作？

这些是我得到的错误;

Error:(21, 59) error: cannot find symbol class List
Error:(21, 64) error: cannot find symbol class NameValuePair
Error:(23, 13) error: cannot find symbol class DefaultHttpClient
Error:(23, 48) error: cannot find symbol class DefaultHttpClient
Error:(24, 13) error: cannot find symbol class HttpEntity
Error:(25, 13) error: cannot find symbol class HttpResponse
Error:(28, 17) error: cannot find symbol class HttpPost
Error:(28, 41) error: cannot find symbol class HttpPost
Error:(30, 44) error: cannot find symbol class UrlEncodedFormEntity
Error:(37, 42) error: cannot find symbol variable URLEncodedUtils
Error:(40, 17) error: cannot find symbol class HttpGet
Error:(40, 39) error: cannot find symbol class HttpGet
Error:(48, 28) error: cannot find symbol variable EntityUtils`

以下是我的build.gradle文件：

buildscript {
    repositories {
        maven { url 'https://maven.fabric.io/public' }
    }

    dependencies {
        classpath 'io.fabric.tools:gradle:1.19.2'
    }
}
apply plugin: 'com.android.application'
apply plugin: 'io.fabric'

repositories {
    maven { url 'https://maven.fabric.io/public' }
}

android {
    compileSdkVersion 23
    buildToolsVersion "23.0.1"
    useLibrary 'org.apache.http.legacy'

    defaultConfig {
        applicationId "com.radioafrica.music"
        minSdkVersion 11
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:cardview-v7:23.0.1'
    compile 'com.android.support:appcompat-v7:23.0.1'
    compile 'com.android.support:recyclerview-v7:23.0.1'
    compile 'com.android.support:palette-v7:23.0.1'
    compile 'com.android.support:design:23.0.1'
    compile 'com.android.support:support-v4:23.0.1'
    compile 'com.facebook.android:facebook-android-sdk:4.1.0'
    compile 'com.squareup.picasso:picasso:2.5.2'
    compile 'com.squareup.okhttp:okhttp:2.4.0'
    compile 'de.hdodenhof:circleimageview:1.3.0'
    compile 'com.github.ksoichiro:android-observablescrollview:1.5.0'
    compile('com.crashlytics.sdk.android:crashlytics:2.5.0@aar') {
        transitive = true;
    }
    compile('com.twitter.sdk.android:twitter:1.6.1@aar') {
        transitive = true;
    }
    compile 'com.nineoldandroids:library:2.4.0'

}

解决方法:

经过一些研究,我发现该库实际上包含在编译和打包中,但未在IDE中显示.

作为解决方法,您可以删除该行

useLibrary 'org.apache.http.legacy'

将文件org.apache.http.legacy.jar从Android / Sdk / platforms / android-23 / optional复制到项目中的libs文件夹.

报告此问题的人的参考

https://code.google.com/p/android/issues/detail?id=181474

https://code.google.com/p/android/issues/detail?id=183668