Question

现在正在构建一个Android应用程序，我希望用户将视频上传到服务器，然后在上传之后，它应该出现在MainActivity上，我已经使用Firebase设置了登录/注册，但Firebase没有＆＃ 39;支持流媒体视频（根据我的尝试），因此我长时间在谷歌上搜索服务器以及服务器如何处理视频上传和流媒体，但我已达到终点。

我想要做的是，构建一个系统，用户可以将视频从本地设备上传到服务器，然后下载（从服务器流式传输视频），以便用户以后可以与之交互。我不知道该怎么做，我已经搜索了很多，但无法找到我需要做的事情/学习

Answer 1

您如何上传视频以及如何使其可用，这实际上是两个不同的问题。

从Android上传：

您可以使用许多库上传到Android - 下面的代码使用apache multipart客户端，它经过测试和运行。其他http库包括Volley和retrofit。

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);
    }

要在服务器端提供视频，您只需要一台可以为静态内容提供服务的HTTP服务器或视频流服务器 - 后者将允许您使用自适应比特率流（ABR - 例如HLS或DASH）以获得更好的质量，但可能因你的需要而过度。

任何一种方法都会为您提供视频的网址，您可以使用Android播放器（如ExoPlayer）播放视频：

https://github.com/google/ExoPlayer

如何将视频从Android设备上传到服务器或主机，然后再次检索？

1 个答案: