如何在Android P上使用apache http

Question

当我在Android P设备中运行我的应用程序时，我收到如下错误：

java.lang.RuntimeException: Unable to instantiate application com.le.android.client.LeApplication: java.lang.ClassNotFoundException: Didn't find class "com.le.android.client.LeApplication" on path: DexPathList[[zip file "/system/framework/org.apache.http.legacy.boot.jar", zip file "/data/app/com.le.android.client-uvQkO641-__8Z_p2oT0t7g==/base.apk"],nativeLibraryDirectories=[/data/app/com.le.android.client-uvQkO641-__8Z_p2oT0t7g==/lib/arm, /data/app/com.le.android.client-uvQkO641-__8Z_p2oT0t7g==/base.apk!/lib/armeabi, /system/lib, /vendor/lib]]
at android.app.LoadedApk.makeApplication(LoadedApk.java:1009)
at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5836)
at android.app.ActivityThread.access$1000(ActivityThread.java:198)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1637)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6649)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:826)

Caused by: java.lang.ClassNotFoundException: Didn't find class "com.le.android.client.LeApplication" on path: DexPathList[[zip file "/system/framework/org.apache.http.legacy.boot.jar", zip file "/data/app/com.le.android.client-uvQkO641-__8Z_p2oT0t7g==/base.apk"],nativeLibraryDirectories=[/data/app/com.le.android.client-uvQkO641-__8Z_p2oT0t7g==/lib/arm, /data/app/com.le.android.client-uvQkO641-__8Z_p2oT0t7g==/base.apk!/lib/armeabi, /system/lib, /vendor/lib]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:125)
at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
at android.app.AppComponentFactory.instantiateApplication(AppComponentFactory.java:50)
at android.app.Instrumentation.newApplication(Instrumentation.java:1120)
at android.app.LoadedApk.makeApplication(LoadedApk.java:1001)
... 9 more

我应该如何在Android P中使用库org.apache.http.legacy？

Answer 1

我读了Android P behavior changes，我收到一些消息：

Apache HTTP客户端弃用在Android 6.0中，我们删除了对Apache HTTP客户端的支持。从Android P开始，该库将从bootclasspath中删除，默认情况下不可用于应用程序。

要继续使用Apache HTTP客户端，针对Android P及更高版本的应用必须将以下内容添加到其AndroidManifest.xml中：

<uses-library android：name =“org.apache.http.legacy”android：required =“false”/>

注意：最低SDK为23或更低的应用程序需要android：required =“false”属性，因为在API级别低于24的设备上，org.apache.http.legacy库不可用。 （在这些设备上，Apache HTTP类在bootclasspath上可用。）

Answer 2

在Android 9.0中运行org.apache.http.legacy完全创建一个xml文件res/xml/network_security_config.xml

<?xml version="1.0" encoding="utf-8"?>
    <network-security-config>
      <base-config cleartextTrafficPermitted="true">
       <trust-anchors>
        <certificates src="system" />
       </trust-anchors>
      </base-config>
    </network-security-config>

并在AndroidManifest.xml中添加2个标签标签

机器人：networkSecurityConfig = “@ XML / network_security_config”

机器人：名字= “org.apache.http.legacy”

<?xml version="1.0" encoding="utf-8"?>
 <manifest......>
  <application android:networkSecurityConfig="@xml/network_security_config">
   <activity..../> 
   ......
   ......
 <uses-library
        android:name="org.apache.http.legacy"
        android:required="false"/>
</application>

还要在app build gradle中添加useLibrary 'org.apache.http.legacy'

android {
compileSdkVersion 28
defaultConfig {
    applicationId "your application id"
    minSdkVersion 15
    targetSdkVersion 28
    versionCode 1
    versionName "1.0"
    testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    useLibrary 'org.apache.http.legacy'
}