要在Android应用中播放来自Google驱动器的视频，可以使用Google Drive API获取视频的URL，并使用Android的MediaPlayer类进行播放。下面是一个示例代码：

1. 首先，在你的Android项目中添加Google Drive API的依赖。在项目的build.gradle文件中添加以下代码：

implementation 'com.google.api-client:google-api-client-android:1.30.10'
implementation 'com.google.apis:google-api-services-drive:v3-rev305-1.25.0'

2. 在你的AndroidManifest.xml文件中添加以下权限：

3. 创建一个新的类来处理Google Drive API的请求，例如GoogleDriveService.java：

import com.google.android.gms.auth.api.signin.GoogleSignInAccount;
import com.google.api.client.extensions.android.http.AndroidHttp;
import com.google.api.client.googleapis.auth.oauth2.GoogleCredential;
import com.google.api.client.googleapis.extensions.android.gms.auth.GoogleAccountCredential;
import com.google.api.client.http.HttpTransport;
import com.google.api.client.json.JsonFactory;
import com.google.api.client.json.gson.GsonFactory;
import com.google.api.services.drive.Drive;
import com.google.api.services.drive.DriveScopes;
import com.google.api.services.drive.model.File;
import com.google.api.services.drive.model.FileList;

import java.io.IOException;
import java.util.Collections;
import java.util.List;

public class GoogleDriveService {
    private static final String APPLICATION_NAME = "Your App Name";
    private static final JsonFactory JSON_FACTORY = GsonFactory.getDefaultInstance();
    private static final List SCOPES = Collections.singletonList(DriveScopes.DRIVE_READONLY);

    private Drive driveService;

    public GoogleDriveService(GoogleSignInAccount signInAccount) {
        GoogleAccountCredential credential = GoogleAccountCredential.usingOAuth2(
                signInAccount.getApplicationContext(), SCOPES);
        credential.setSelectedAccount(signInAccount.getAccount());

        HttpTransport httpTransport = AndroidHttp.newCompatibleTransport();
        GoogleCredential googleCredential = new GoogleCredential().setAccessToken(credential.getToken());
        driveService =
                new Drive.Builder(httpTransport, JSON_FACTORY, googleCredential)
                        .setApplicationName(APPLICATION_NAME)
                        .build();
    }

    public String getVideoUrl() throws IOException {
        String videoUrl = null;

        FileList result = driveService.files().list()
                .setFields("files(id, name, webViewLink)")
                .execute();

        List files = result.getFiles();
        if (files != null && !files.isEmpty()) {
            File videoFile = files.get(0); // Get the first video file
            videoUrl = videoFile.getWebViewLink();
        }

        return videoUrl;
    }
}

4. 在你的Activity类中使用GoogleDriveService来获取视频的URL并播放视频，例如MainActivity.java：

import android.media.MediaPlayer;
import android.net.Uri;
import android.os.Bundle;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;

import com.google.android.gms.auth.api.signin.GoogleSignIn;
import com.google.android.gms.auth.api.signin.GoogleSignInAccount;
import com.google.android.gms.auth.api.signin.GoogleSignInOptions;
import com.google.android.gms.common.api.ApiException;

import java.io.IOException;

public class MainActivity extends AppCompatActivity implements SurfaceHolder.Callback {
    private static final int RC_SIGN_IN = 123;
    private static final String GOOGLE_DRIVE_VIDEO_ID = "Your Video ID";

    private GoogleSignInAccount signInAccount;
    private MediaPlayer mediaPlayer;
    private SurfaceView surfaceView;
    private SurfaceHolder surfaceHolder;
    private GoogleDriveService driveService;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        surfaceView = findViewById(R.id.surface_view);
        surfaceHolder = surfaceView.getHolder();
        surfaceHolder.addCallback(this);

        GoogleSignInOptions gso =
                new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
                        .requestScopes(DriveScopes.DRIVE_READONLY)
                        .build();
        GoogleSignInClient signInClient = GoogleSignIn.getClient(this, gso);
        signInClient.silentSignIn()
                .addOnCompleteListener(this, task -> {
                    if (task.isSuccessful()) {
                        signInAccount = task.getResult();
                        driveService = new GoogleDriveService(signInAccount);

                        try {
                            String videoUrl = driveService.getVideoUrl();
                            if (videoUrl != null) {
                                playVideo(videoUrl);
                            } else {
                                Toast.makeText(MainActivity.this, "Video URL is null", Toast.LENGTH_SHORT).show();
                            }
                        } catch (IOException e) {
                            e.printStackTrace();
                        }
                    } else {
                        signIn();
                    }