无法使用多部分实体上传视频文件

Question

我正在尝试使用 Multipart Entity 上传视频文件。对于使用 Multipart Entity 方法，有人提到我应该使用以下 jar 文件 httpclient、httpmime、httpcore。但是在添加 httpcore jar 文件时，我无法运行我的项目，它会在我的控制台中抛出以下error。

在删除这个特定的 jar 时，当我尝试运行我的应用程序时，我的日志显示以下 error in my code。

这是我的代码供您参考：

public class UploadActivity extends Activity {
// LogCat tag
private static final String TAG = MainActivity.class.getSimpleName();

private ProgressBar progressBar;
private String filePath = null;
private TextView txtPercentage;
private ImageView imgPreview;
private VideoView vidPreview;
private Button btnUpload;
long totalSize = 0;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_upload);
    txtPercentage = (TextView) findViewById(R.id.txtPercentage);
    btnUpload = (Button) findViewById(R.id.btnUpload);
    progressBar = (ProgressBar) findViewById(R.id.progressBar);
    imgPreview = (ImageView) findViewById(R.id.imgPreview);
    vidPreview = (VideoView) findViewById(R.id.videoPreview);

    // Changing action bar background color
    /*
     * getActionBar().setBackgroundDrawable( new
     * ColorDrawable(Color.parseColor(getResources().getString(
     * R.color.action_bar))));
     */

    // Receiving the data from previous activity
    Intent i = getIntent();

    // image or video path that is captured in previous activity
    filePath = i.getStringExtra("filePath");

    // boolean flag to identify the media type, image or video
    boolean isImage = i.getBooleanExtra("isImage", true);

    if (filePath != null) {
        // Displaying the image or video on the screen
        previewMedia(isImage);
    } else {
        Toast.makeText(getApplicationContext(),
                "Sorry, file path is missing!", Toast.LENGTH_LONG).show();
    }

    btnUpload.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            // uploading the file to server
            new UploadFileToServer().execute();
        }
    });

}

/**
 * Displaying captured image/video on the screen
 * */
private void previewMedia(boolean isImage) {
    // Checking whether captured media is image or video
    if (isImage) {
        imgPreview.setVisibility(View.VISIBLE);
        vidPreview.setVisibility(View.GONE);
        // bimatp factory
        BitmapFactory.Options options = new BitmapFactory.Options();

        // down sizing image as it throws OutOfMemory Exception for larger
        // images
        options.inSampleSize = 8;

        final Bitmap bitmap = BitmapFactory.decodeFile(filePath, options);

        imgPreview.setImageBitmap(bitmap);
    } else {
        imgPreview.setVisibility(View.GONE);
        vidPreview.setVisibility(View.VISIBLE);
        vidPreview.setVideoPath(filePath);
        // start playing
        vidPreview.start();
    }
}

/**
 * Uploading the file to server
 * */
private class UploadFileToServer extends AsyncTask<Void, Integer, String> {
    @Override
    protected void onPreExecute() {
        // setting progress bar to zero
        progressBar.setProgress(0);
        super.onPreExecute();
    }

    @Override
    protected void onProgressUpdate(Integer... progress) {
        // Making progress bar visible
        progressBar.setVisibility(View.VISIBLE);

        // updating progress bar value
        progressBar.setProgress(progress[0]);

        // updating percentage value
        txtPercentage.setText(String.valueOf(progress[0]) + "%");
    }

    @Override
    protected String doInBackground(Void... params) {
        return uploadFile();
    }

    @SuppressWarnings("deprecation")
    private String uploadFile() {
        String responseString = null;

        HttpClient httpclient = new DefaultHttpClient();
        HttpPost httppost = new HttpPost(Config.FILE_UPLOAD_URL);

        try {
            AndroidMultiPartEntity entity = new AndroidMultiPartEntity(
                    new ProgressListener() {

                        @Override
                        public void transferred(long num) {
                            publishProgress((int) ((num / (float) totalSize) * 100));
                        }
                    });

            File sourceFile = new File(filePath);

            // Adding file data to http body
            entity.addPart("image", new FileBody(sourceFile));

            // Extra parameters if you want to pass to server
            entity.addPart("website",
                    new StringBody("www.androidhive.info"));
            entity.addPart("email", new StringBody("abc@gmail.com"));

            totalSize = entity.getContentLength();
            httppost.setEntity(entity);

            // Making server call
            HttpResponse response = httpclient.execute(httppost);
            HttpEntity r_entity = response.getEntity();

            int statusCode = response.getStatusLine().getStatusCode();
            if (statusCode == 200) {
                // Server response
                responseString = EntityUtils.toString(r_entity);
            } else {
                responseString = "Error occurred! Http Status Code: "
                        + statusCode;
            }

        } catch (ClientProtocolException e) {
            responseString = e.toString();
        } catch (IOException e) {
            responseString = e.toString();
        }

        return responseString;

    }

    @Override
    protected void onPostExecute(String result) {
        Log.e(TAG, "Response from server: " + result);

        // showing the server response in an alert dialog
        showAlert(result);

        super.onPostExecute(result);
    }

}

/**
 * Method to show alert dialog
 * */
private void showAlert(String message) {
    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setMessage(message).setTitle("Response from Servers")
            .setCancelable(false)
            .setPositiveButton("OK", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int id) {
                    // do nothing
                }
            });
    AlertDialog alert = builder.create();
    alert.show();
}

}

谁能帮我解决这个问题？就像为什么我在尝试添加 Httpcore jar 时遇到此错误一样，我该如何克服这些...???

或者我有什么替代方法可以让它工作？？？？

Answer 1

以下代码经过测试，适用于从 Android 上传视频。

正如 Knossos 在 cmets 中对您的问题所说，这些天在 Android 中有更新、更多推荐的 HTTP 库，尽管您可能需要检查它们是否正确处理 Multipart 消息，这毫无价值。 Android 中 HTTP 的一个很好的概述（有一段有趣的历史）在这里：https://packetzoom.com/blog/which-android-http-library-to-use.html

import java.io.File;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
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.HttpMultipartMode;
import org.apache.http.entity.mime.MultipartEntity;
import org.apache.http.entity.mime.content.FileBody;
import org.apache.http.entity.mime.content.StringBody;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;

import android.os.AsyncTask;
import android.util.Log;

public class VideoUploadTask extends AsyncTask<String, String, Integer> {
    /* This Class is an AsynchTask to upload a video to a server on a background thread
     * 
     */

    private VideoUploadTaskListener thisTaskListener;
    private String serverURL;
    private String videoPath;

    public VideoUploadTask(VideoUploadTaskListener ourListener) {
        //Constructor
        Log.d("VideoUploadTask","constructor");

        //Set the listener
        thisTaskListener = ourListener;
    }

    @Override
    protected Integer doInBackground(String... params) {
        //Upload the video in the background
        Log.d("VideoUploadTask","doInBackground");

        //Get the Server URL and the local video path from the parameters
        if (params.length == 2) {
            serverURL = params[0];
            videoPath = params[1];
        } else {
            //One or all of the params are not present - log an error and return
            Log.d("VideoUploadTask doInBackground","One or all of the params are not present");
            return -1;
        }


        //Create a new Multipart HTTP request to upload the video
        HttpClient httpclient = new DefaultHttpClient();
        HttpPost httppost = new HttpPost(serverURL);

        //Create a Multipart entity and add the parts to it
        try {
            Log.d("VideoUploadTask doInBackground","Building the request for file: " + videoPath);
            FileBody filebodyVideo = new FileBody(new File(videoPath));
            StringBody title = new StringBody("Filename:" + videoPath);
            StringBody description = new StringBody("Test Video");
            MultipartEntity reqEntity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);
            reqEntity.addPart("videoFile", filebodyVideo);
            reqEntity.addPart("title", title);
            reqEntity.addPart("description", description);
            httppost.setEntity(reqEntity);
        } catch (UnsupportedEncodingException e1) {
            //Log the error
            Log.d("VideoUploadTask doInBackground","UnsupportedEncodingException error when setting StringBody for title or description");
            e1.printStackTrace();
            return -1;
        }

        //Send the request to the server
        HttpResponse serverResponse = null;
        try {
            Log.d("VideoUploadTask doInBackground","Sending the Request");
            serverResponse = httpclient.execute( httppost );
        } catch (ClientProtocolException e) {
            //Log the error
            Log.d("VideoUploadTask doInBackground","ClientProtocolException");
            e.printStackTrace();
        } catch (IOException e) {
            //Log the error
            Log.d("VideoUploadTask doInBackground","IOException");
            e.printStackTrace();
        }

        //Check the response code
        Log.d("VideoUploadTask doInBackground","Checking the response code");
        if (serverResponse != null) {
            Log.d("VideoUploadTask doInBackground","ServerRespone" + serverResponse.getStatusLine());
            HttpEntity responseEntity = serverResponse.getEntity( );
            if (responseEntity != null) {
                //log the response code and consume the content
                Log.d("VideoUploadTask doInBackground","responseEntity is not null");
                try {
                    responseEntity.consumeContent( );
                } catch (IOException e) {
                    //Log the (further...) error...
                    Log.d("VideoUploadTask doInBackground","IOexception consuming content");
                    e.printStackTrace();
                }
            } 
        } else {
            //Log that response code was null
            Log.d("VideoUploadTask doInBackground","serverResponse = null");
            return -1;
        }

        //Shut down the connection manager
        httpclient.getConnectionManager( ).shutdown( ); 
        return 1;
    }

    @Override
    protected void onPostExecute(Integer result) {
        //Check the return code and update the listener
        Log.d("VideoUploadTask onPostExecute","updating listener after execution");
        thisTaskListener.onUploadFinished(result);
    }

}