Android - MultipartEntity和依赖项

Question

我最近将我的项目从Eclipse迁移到Android Studio(我还没有完全控制这个IDE).在这个项目中,我有一个文件上传器AsyncTask,它通过http发送multipart.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

---

我在启动上传时获得的异常:

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依赖之间存在冲突但我没有找到解决问题的解决方案.

Answer 1

我有同样的问题 - 尝试使用http-android-client(这也依赖于httmime但需要4.3).这对我有用:

dependencies {
  compile group: 'org.apache.httpcomponents' , name: 'httpclient-android' , version: '4.3.5.1'
  compile('org.apache.httpcomponents:httpmime:4.3') {
      exclude module: "httpclient"
  }
}

Answer 2

Android Studio的解决方案

右键单击左侧的app foleder - >打开模块设置 - >依赖关系 - >单击'+' - > 1.库Dependencie

现在"选择文件依赖项"框将出现 - 提供输入'httpmime:4.4'并单击搜索按钮.

它将显示dependdencie文件.选择该文件并单击"确定".

等待...它将添加jar,Gradle脚本将自动更新.