java - android上传文件通过kitkat中提供的存储api打开

Question

使用下面的代码打开文件

Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
                        intent.addCategory(Intent.CATEGORY_OPENABLE);
                        intent.setType("image/*");
                        startActivityForResult(intent, READ_REQUEST_CODE);

使用下面的代码来读取文件

ParcelFileDescriptor parcelFileDescriptor =AttachImageOnPost.this.getContentResolver()
    .openFileDescriptor(data.getData(), "r");

FileDescriptor fileDescriptor = parcelFileDescriptor.getFileDescriptor();
Rect rect=new Rect(100, 100, 100, 100);
image.setImageBitmap(BitmapFactory.decodeFileDescriptor(fileDescriptor, rect));

有什么方法可以使用HttpClient上传文件

Answer 1

import java.io.File;
import java.io.IOException;

import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.mime.MultipartEntity;
import org.apache.http.entity.mime.content.ContentBody;
import org.apache.http.entity.mime.content.FileBody;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.params.CoreProtocolPNames;
import org.apache.http.util.EntityUtils;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpVersion;

public class SendImageHttpPost {

          public static void sendPost(String url, String imagePath) throws IOException, ClientProtocolException  {
                    HttpClient httpclient = new DefaultHttpClient();
                    httpclient.getParams().setParameter(CoreProtocolPNames.PROTOCOL_VERSION, HttpVersion.HTTP_1_1);

                    HttpPost httppost = new HttpPost(url);
                    File file = new File(imagePath);

                    MultipartEntity mpEntity = new MultipartEntity();
                    ContentBody cbFile = new FileBody(file, "image/jpeg");
                    mpEntity.addPart("userfile", cbFile);

                    httppost.setEntity(mpEntity);
                    Log.e("executing request " + httppost.getRequestLine());
                    HttpResponse response = httpclient.execute(httppost);
                    HttpEntity resEntity = response.getEntity();
                    Log.e(""+response.getStatusLine());
                    if (resEntity != null) {
                              Log.e(EntityUtils.toString(resEntity));
                    }
                    if (resEntity != null) {
                              resEntity.consumeContent();
                    }
                    httpclient.getConnectionManager().shutdown();
          }
}

但是我强烈建议您使用一些好的开源库，以使您的任务更轻松、整洁，例如 Ion:

https://github.com/koush/ion

Ion.with(getContext())
    .load("https://koush.clockworkmod.com/test/echo")
    .uploadProgressBar(uploadProgressBar)
    .setMultipartParameter("goop", "noop")
    .setMultipartFile("archive", "application/zip", new File("/sdcard/filename.zip"))
    .asJsonObject()
    .setCallback(...)

或 Volley :

https://github.com/mcxiaoke/android-volley