我最近将项目从Eclipse迁移到了Android Studio(我还不完全掌握这个IDE)。在这个项目中,我有一个文件上传的AsyncTask,它通过http发送多部分。为此,我使用org.apache.httpcomponents。 我创建了以下依赖项:
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'org.apache.httpcomponents:httpcore:4.4'
compile 'org.apache.httpcomponents:httpmime:4.4'
...
}
在我的Java AsyncTask代码中:MultipartEntityBuilder builder = MultipartEntityBuilder.create();
builder.addBinaryBody(...);
builder.addBinaryBody(...);
builder.addBinaryBody(...);
HttpEntity entity = builder.build(); // < throw exception
我在启动上传时遇到的异常:
Caused by: java.lang.NoSuchFieldError: org.apache.http.message.BasicHeaderValueFormatter.INSTANCE
at org.apache.http.entity.ContentType.toString(ContentType.java:153)
at org.apache.http.entity.mime.MultipartFormEntity.<init>(MultipartFormEntity.java:52)
at org.apache.http.entity.mime.MultipartEntityBuilder.buildEntity(MultipartEntityBuilder.java:226)
at org.apache.http.entity.mime.MultipartEntityBuilder.build(MultipartEntityBuilder.java:230)
我认为android.jar > httpcomponents
和org.apache.httpcomponents
依赖存在冲突,但我找不到解决问题的方法。