java - Using org.apache.http.legacy in Android 9

Question

I have an old android app that uses the apache legacy Http library (org.apache.http.legacy). After the changes on Android 6, I was able to keep the app working including the legacy library.

useLibrary 'org.apache.http.legacy'.

Now in Android 9 devices I get the below exceptions at runtime.

Caused by: java.lang.IncompatibleClassChangeError: Class 'org.apache.http.conn.ssl.SSLSocketFactory' does not implement interface 'org.apache.http.conn.scheme.SchemeSocketFactory' in call to 'java.net.Socket org.apache.http.conn.scheme.SchemeSocketFactory.createSocket(org.apache.http.params.HttpParams)' (declaration of 'org.apache.http.impl.conn.DefaultClientConnectionOperator' appears in /data/app/com.theprojectfactory.wmp-RdZODaT5h-l1diSw3oNCvA==/base.apk)
    at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:165)
    at org.apache.http.impl.conn.ManagedClientConnectionImpl.open(ManagedClientConnectionImpl.java:304)
    at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:611)
    at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:446)
    at org.apache.http.impl.client.AbstractHttpClient.doExecute(AbstractHttpClient.java:863)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:106)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:57)

Reading the Android 9 changes docs, there is a mention to add <uses-library android:name="org.apache.http.legacy" android:required="false"/> in the AndroidManifes.xml file, however that does not seem to work for me either as I get the below exception instead when launching the app.

java.lang.VerifyError: Superclass org.apache.http.params.BasicHttpParams of org.apache.http.params.SyncBasicHttpParams is declared final (declaration of 'org.apache.http.params.SyncBasicHttpParams' appears in /data/app/com.theprojectfactory.wmp-R2P9RNgoJ82ZupwxVa7iNA==/base.apk)
    at java.lang.Class.classForName(Native Method)
    at java.lang.Class.forName(Class.java:453)
    at com.activeandroid.ModelInfo.scanForModelClasses(ModelInfo.java:187)
    at com.activeandroid.ModelInfo.scanForModel(ModelInfo.java:152)
    at com.activeandroid.ModelInfo.<init>(ModelInfo.java:63)
    at com.activeandroid.Cache.initialize(Cache.java:66)
    at com.activeandroid.ActiveAndroid.initialize(ActiveAndroid.java:44)
    at com.activeandroid.ActiveAndroid.initialize(ActiveAndroid.java:34)
    at com.activeandroid.content.ContentProvider.onCreate(ContentProvider.java:39)
    at android.content.ContentProvider.attachInfo(ContentProvider.java:1917)
    at android.content.ContentProvider.attachInfo(ContentProvider.java:1892)
    at android.app.ActivityThread.installProvider(ActivityThread.java:6391)
    at android.app.ActivityThread.installContentProviders(ActivityThread.java:5938)
    at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5853)
    at android.app.ActivityThread.access$1100(ActivityThread.java:199)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1650)
    at android.os.Handler.dispatchMessage(Handler.java:106)
    at android.os.Looper.loop(Looper.java:193)
    at android.app.ActivityThread.main(ActivityThread.java:6669)
    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:858)

Any pointers on how to keep using the org.apache.http.legacy on Android 9 api will be much appreciated.

Answer 1

You have to add attribute of android:usesCleartextTraffic="true" on application tag in AndroidManifes.xml file.

And also add this.

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