问题
I wish to include the latest version of Http with my Android App, which is 4.2.1. Now wish to download the library from Apache website and include it in the libs folder and then to the build path of my app.
On including Http - 4.2.1, I got the following output in the logcat
08-28 02:42:40.917: D/dalvikvm(25641): DexOpt: 'Lorg/apache/http/client/ResponseHandler;' has an earlier definition; blocking out
08-28 02:42:40.917: D/dalvikvm(25641): DexOpt: 'Lorg/apache/commons/codec/Decoder;' has an earlier definition; blocking out
08-28 02:42:40.927: D/dalvikvm(25641): DexOpt: 'Lorg/apache/commons/codec/BinaryDecoder;' has an earlier definition; blocking out
08-28 02:42:40.927: D/dalvikvm(25641): DexOpt: 'Lorg/apache/commons/codec/Encoder;' has an earlier definition; blocking out
08-28 02:42:40.927: D/dalvikvm(25641): DexOpt: 'Lorg/apache/commons/codec/BinaryEncoder;' has an earlier definition; blocking out
08-28 02:42:40.927: D/dalvikvm(25641): DexOpt: 'Lorg/apache/commons/codec/DecoderException;' has an earlier definition; blocking out
08-28 02:42:40.927: D/dalvikvm(25641): DexOpt: 'Lorg/apache/commons/codec/EncoderException;' has an earlier definition; blocking out
08-28 02:42:40.927: D/dalvikvm(25641): DexOpt: 'Lorg/apache/commons/codec/StringDecoder;' has an earlier definition; blocking out
08-28 02:42:40.927: D/dalvikvm(25641): DexOpt: 'Lorg/apache/commons/codec/StringEncoder;' has an earlier definition; blocking out
08-28 02:42:40.927: D/dalvikvm(25641): DexOpt: 'Lorg/apache/commons/codec/StringEncoderComparator;' has an earlier definition; blocking out
08-28 02:42:40.937: D/dalvikvm(25641): DexOpt: 'Lorg/apache/commons/codec/binary/Base64;' has an earlier definition; blocking out
08-28 02:42:42.847: D/dalvikvm(25641): DexOpt: not verifying 'Lorg/apache/http/HeaderElement;': multiple definitions
08-28 02:42:42.847: D/dalvikvm(25641): DexOpt: not verifying 'Lorg/apache/http/HeaderElementIterator;': multiple definitions
08-28 02:42:42.847: D/dalvikvm(25641): DexOpt: not verifying 'Lorg/apache/http/HeaderIterator;': multiple definitions
08-28 02:42:42.847: D/dalvikvm(25641): DexOpt: not verifying 'Lorg/apache/http/HttpConnection;': multiple definitions
08-28 02:42:42.847: D/dalvikvm(25641): DexOpt: not verifying 'Lorg/apache/http/HttpClientConnection;': multiple definitions
08-28 02:42:42.847: D/dalvikvm(25641): DexOpt: not verifying 'Lorg/apache/http/HttpConnectionMetrics;': multiple definitions
08-28 02:42:42.847: D/dalvikvm(25641): DexOpt: not verifying 'Lorg/apache/http/HttpEntity;': multiple definitions
08-28 02:42:42.857: D/dalvikvm(25641): DexOpt: not verifying 'Lorg/apache/http/HttpMessage;': multiple definitions
08-28 02:42:42.857: D/dalvikvm(25641): DexOpt: not verifying 'Lorg/apache/http/HttpRequest;': multiple definitions
08-28 02:42:42.857: D/dalvikvm(25641): DexOpt: not verifying 'Lorg/apache/http/HttpEntityEnclosingRequest;': multiple definitions
08-28 02:42:42.857: D/dalvikvm(25641): DexOpt: not verifying 'Lorg/apache/http/HttpException;': multiple definitions
08-28 02:42:42.857: D/dalvikvm(25641): DexOpt: not verifying 'Lorg/apache/http/HttpHost;': multiple definitions
08-28 02:42:42.857: D/dalvikvm(25641): DexOpt: not verifying 'Lorg/apache/http/HttpInetConnection;': multiple definitions
08-28 02:42:42.857: D/dalvikvm(25641): DexOpt: not verifying 'Lorg/apache/http/HttpRequestFactory;': multiple definitions
My question is can I do this? Will this create some conflict with already included version of Http library along with the SDK?
回答1:
Unfortunately this problem does not have an elegant and clean solution. The only option you have is to move all HttpClient classes to a custom namespace ('org.apache.http' -> 'my.http') using maven shade plugin or using a prepackaged fork of the library available here
EDIT
As of today one can also use the official port of Apache HttpClient 4.3 to Google Android.
回答2:
<classpathentry kind="con" path="com.android.ide.eclipse.adt.ANDROID_FRAMEWORK">
<accessrules>
<accessrule kind="nonaccessible" pattern="org/apache/http/**"/>
</accessrules>
</classpathentry>
i fix it modify application's .classpath file like this and i was find the solution in open source project open-gpstracker
来源：https://stackoverflow.com/questions/12146984/include-http-4-2-1-with-android-app