How to use apache http on Android P

Question

When I run my app in Android P devices, I get some error like this:

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

How should I use the library org.apache.http.legacy in Android P?

Answer 1

I read the Android P behavior changes,and I get some messages:

Apache HTTP client deprecation With Android 6.0, we removed support for the Apache HTTP client. Beginning with Android P, that library is removed from the bootclasspath and is not available to apps by default.

To continue using the Apache HTTP client, apps that target Android P and above must add the following to their AndroidManifest.xml:

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

Note: The android:required="false" attribute is required for apps that have a minimum SDK of 23 or lower, because on devices with API levels lower than 24, the org.apache.http.legacy library is not available. (On those devices, the Apache HTTP classes are available on the bootclasspath.)