使用 Drive API 将图像上传到 Google Drive

Question

我正在尝试使用驱动器 API 将图像上传到谷歌驱动器。 作为第一步，我开发了一个代码，按照教程将 PDF 文件（文件路径是硬编码的）上传到谷歌驱动器。

1. PDF 将成功上传，但有时我会从日志中收到超时消息。 这可能是因为我的连接不良。 但是当这样的事情发生时，有没有合适的方法通过代码来处理呢？

2. 请通过更改此代码指导我如何上传图像而不是 PDF。 我试过了，但我没能成功。 请帮助这部分。 我在这里卡了两天

import android.util.Log;
import com.google.android.gms.tasks.Task;
import com.google.android.gms.tasks.Tasks;
import com.google.api.client.http.FileContent;
import com.google.api.services.drive.Drive;
import com.google.api.services.drive.model.File;

import java.io.IOException;
import java.util.concurrent.Executor;
import java.util.concurrent.Executors;

public class DriveServiceHelper {

    private final Executor mExecutor = Executors.newSingleThreadExecutor();
    private Drive mDriveService;

    public DriveServiceHelper(Drive mDriveService){

        this.mDriveService = mDriveService;
    }

    public Task<String> createFilePdf(String filePath){
        return Tasks.call(mExecutor, () -> {
            File fileMetaData = new File();
            fileMetaData.setName("MyPDFFile");

            java.io.File file = new java.io.File(filePath);

            FileContent mediaContent = new FileContent("application/pdf",file);

            File myFile = null;
            try {
                myFile = mDriveService.files().create(fileMetaData,mediaContent).execute();
            }catch (Exception e){
                e.printStackTrace();
                Log.i("myissue", e.getMessage());
            }

            if (myFile == null){
                throw new IOException("Null result when requesting file creation");
            }
            return myFile.getId();


        });
    }
}

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;

import android.app.ProgressDialog;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;

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.GoogleSignInClient;
import com.google.android.gms.auth.api.signin.GoogleSignInOptions;
import com.google.android.gms.common.api.Scope;
import com.google.android.gms.tasks.OnFailureListener;
import com.google.android.gms.tasks.OnSuccessListener;
import com.google.api.client.extensions.android.http.AndroidHttp;
import com.google.api.client.googleapis.extensions.android.gms.auth.GoogleAccountCredential;
import com.google.api.client.json.gson.GsonFactory;
import com.google.api.services.drive.Drive;
import com.google.api.services.drive.DriveScopes;

import java.util.Collections;

public class MainActivity extends AppCompatActivity {

    DriveServiceHelper driveServiceHelper;

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

    private void requestSignIn() {
        GoogleSignInOptions signInOptions = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
                .requestEmail()
                .requestScopes(new Scope(DriveScopes.DRIVE_FILE))
                .build();

        GoogleSignInClient client = GoogleSignIn.getClient(this,signInOptions);

        startActivityForResult(client.getSignInIntent(),400);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
        super.onActivityResult(requestCode, resultCode, data);

        switch (requestCode){
            case 400:
                if (resultCode == RESULT_OK){
                    handleSignInIntent(data);
                    break;
                }
        }
    }

    private void handleSignInIntent(Intent data) {
        GoogleSignIn.getSignedInAccountFromIntent(data)
                .addOnSuccessListener(new OnSuccessListener<GoogleSignInAccount>() {
                    @Override
                    public void onSuccess(GoogleSignInAccount googleSignInAccount) {
                        GoogleAccountCredential credential = GoogleAccountCredential
                                .usingOAuth2(MainActivity.this, Collections.singleton(DriveScopes.DRIVE_FILE));

                        credential.setSelectedAccount(googleSignInAccount.getAccount());

                        Drive googleDriveServices = new Drive.Builder(
                                AndroidHttp.newCompatibleTransport(),
                                new GsonFactory(),
                                credential)
                                .setApplicationName("uploadtodrive")
                                .build();

                        driveServiceHelper = new DriveServiceHelper(googleDriveServices);

                    }
                })
                .addOnFailureListener(new OnFailureListener() {
                    @Override
                    public void onFailure(@NonNull Exception e) {

                    }
                });
    }

    public void uploadPdfFile(View v){

        ProgressDialog progressDialog = new ProgressDialog(MainActivity.this);
        progressDialog.setTitle("Uploading to google Drive");
        progressDialog.setMessage("Please wait........");
        progressDialog.show();

        String filePath = "/storage/emulated/0/mypdf.pdf";

        driveServiceHelper.createFilePdf(filePath).addOnSuccessListener(new OnSuccessListener<String>() {
            @Override
            public void onSuccess(String s) {
                progressDialog.dismiss();
                Toast.makeText(getApplicationContext(),"Uploaded Successfully", Toast.LENGTH_SHORT).show();
            }
        })
                .addOnFailureListener(new OnFailureListener() {
                    @Override
                    public void onFailure(@NonNull Exception e) {
                        progressDialog.dismiss();
                        Toast.makeText(getApplicationContext(),"Check your google Drive api key",Toast.LENGTH_SHORT).show();
                    }
                });



    }
}

请帮助这部分。 我被困在这里两天了。 谢谢你

Answer 1

设置适当的 MIME 类型：

要将特定文件类型上传到云端硬盘，您必须在媒体内容上指定其 MIME 类型。 在您的情况下，这是由FileContent处理的：

FileContent mediaContent = new FileContent("application/pdf",file);

因此，您必须将application/pdf替换为适当的 MIME 类型（例如，请参阅G Suite 文档中支持的 MIME 类型）。 图像的可能 MIME 类型包括image/jpeg和image/png 。 例如，您可以这样做：

FileContent mediaContent = new FileContent("image/jpeg",file);

笔记：

• 我假设您在提供的filePath上确实有图像。

参考：

• MIME 类型（IANA 媒体类型）