前端代码

添加gradle依赖

implementation 'com.squareup.retrofit2:retrofit:2.9.0'
implementation 'com.squareup.retrofit2:converter-gson:2.9.0'

添加访问网络权限

<uses-permission android:name="android.permission.INTERNET" />

允许http 请求请求

android:usesCleartextTraffic="true"

video类

package com.example.myapplication;
public class Video {private String url;public String getUrl() {return url;}
}

VideoService 接口类

package com.example.myapplication;import java.util.List;import retrofit2.Call;
import retrofit2.http.GET;public interface VideoService {@GET("/videos")Call<List<Video>> getVideos();
}

MainActivity 类

package com.example.myapplication;import android.net.Uri;
import android.os.Bundle;
import android.util.Log;
import android.widget.VideoView;
import android.widget.Toast;
import android.media.MediaPlayer;
import androidx.appcompat.app.AppCompatActivity;import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;
import retrofit2.Retrofit;
import retrofit2.converter.gson.GsonConverterFactory;import java.util.List;public class MainActivity extends AppCompatActivity {private VideoView videoView;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);videoView = findViewById(R.id.videoView);// 初始化 RetrofitRetrofit retrofit = new Retrofit.Builder().baseUrl("http://192.168.110.148:8080") // 修改为你的 Go 后端地址.addConverterFactory(GsonConverterFactory.create()).build();VideoService service = retrofit.create(VideoService.class);Call<List<Video>> call = service.getVideos();showToast("Starting Retrofit call to get videos");call.enqueue(new Callback<List<Video>>() {@Overridepublic void onResponse(Call<List<Video>> call, Response<List<Video>> response) {if (response.isSuccessful() && response.body() != null) {List<Video> videos = response.body();if (!videos.isEmpty()) {String videoUrl = videos.get(0).getUrl();showToast("Received video URL: " + videoUrl); // 打印 URL 进行调试playVideo(videos.get(0).getUrl()); // 播放第一个视频} else {showToast("No videos found in the response");}} else {showToast("Failed to fetch videos, Response code: " + response.code());}}@Overridepublic void onFailure(Call<List<Video>> call, Throwable t) {showToast("Error fetching videos: " + t.getMessage());t.printStackTrace();}});}private void playVideo(String videoUrl) {showToast("Attempting to play video with URL: " + videoUrl);String fullUrl = "http://192.168.110.148:8080" + videoUrl; // 完整视频 URLshowToast("Full video URL: " + fullUrl);Uri videoUri = Uri.parse(fullUrl);showToast("Parsed URI: " + videoUri.toString());videoView.setVideoURI(videoUri); // 使用 setVideoURI 方法videoView.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {@Overridepublic void onPrepared(MediaPlayer mp) {showToast("Video is prepared, starting playback.");videoView.start(); // 开始播放}});videoView.setOnErrorListener(new MediaPlayer.OnErrorListener() {@Overridepublic boolean onError(MediaPlayer mp, int what, int extra) {showToast("Error occurred while playing video. What: " + what + ", Extra: " + extra);return true; // 返回 true 表示我们已经处理了错误}});}// 用于显示 Toast 信息的辅助方法private void showToast(String message) {Toast.makeText(MainActivity.this, message, Toast.LENGTH_LONG).show();}
}

 go后端代码

package mainimport ("encoding/json""net/http"
)// Video 代表一个视频结构
type Video struct {URL string `json:"url"`
}// VideoList 返回的视频列表
var videoList = []Video{{URL: "/videos/video1.mp4"}, // 本地视频地址{URL: "/videos/video2.mp4"}, // 本地视频地址 http://192.168.0.104:8080/videos/video2.mp4
}func main() {// 在根目录下提供静态文件服务http.Handle("/videos/", http.StripPrefix("/videos/", http.FileServer(http.Dir("./videos"))))http.HandleFunc("/videos", getVideos)http.ListenAndServe(":8080", nil)
}// getVideos 处理视频请求
func getVideos(w http.ResponseWriter, r *http.Request) {w.Header().Set("Content-Type", "application/json")json.NewEncoder(w).Encode(videoList)
}