onActivityResult 未使用 Google Drive API 调用

Question

我正在尝试使用 Google 驱动器 API 将文件上传到驱动器。但是，在我下面的代码中

startActivityForResult(signInIntent, 400);

它永远不会到达 onActivityResult，它只是使用空 driveServiceHelper 直接进入 uploadPdfFile()。

我已经调查了我在这里发现的几件事，但这似乎是一个不同的问题？我是 Android 的初学者，所以也许我忽略了什么？谢谢

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Toolbar toolbar = findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);

    FloatingActionButton fab = findViewById(R.id.fab);
    fab.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                    .setAction("Action", null).show();
        }
    });

    requestSignIn();
    uploadPdfFile();
} 

private void uploadPdfFile() {
    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(), "Upload successfully", Toast.LENGTH_LONG).show();
                }
            })
            .addOnFailureListener(new OnFailureListener() {
                @Override
                public void onFailure(@NonNull Exception e) {
                    progressDialog.dismiss();
                    Toast.makeText(getApplicationContext(), "Check your drive api key", Toast.LENGTH_LONG).show();
                }
            });
}

DriveServiceHelper driveServiceHelper;

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);
    Intent signInIntent = client.getSignInIntent();
    startActivityForResult(signInIntent, 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) {
                handleSignalInIntent(data);
            }
            break;
    }
}

private void handleSignalInIntent(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.setSelectedAccountName(googleSignInAccount.getAccount().name);
                    Drive googleDriveService = new Drive.Builder(
                            AndroidHttp.newCompatibleTransport(),
                            new GsonFactory(),
                            credential)
                            .setApplicationName("My Drive Tutorial")
                            .build();

                    driveServiceHelper = new DriveServiceHelper(googleDriveService);
                }
            })
            .addOnFailureListener(new OnFailureListener() {
                @Override
                public void onFailure(@NonNull Exception e) {
                }
            });
}

这就是项目中几乎所有的代码。（除了 DriveServiceHelper）

Answer 1

Root cause:
首先，您正在调用 requestSignIn 方法。一旦 startActivityForResult(signInIntent, 400); 行执行，
控制转到 uploadPdfFile 方法调用。那时候你的driveServiceHelper还没有初始化。

为了解决这个问题，在调用uploadPdfFile方法之前，首先你必须检查你是否已经在唱歌。如果已经登录，则只调用 uploadPdfFile 方法。否则调用 requestSignIn 方法。在这一行之后

driveServiceHelper = new DriveServiceHelper(googleDriveService); 
uploadPdfFile()

onActivityResult 未使用 Google Drive API 调用

onActivityResult not called using Google Drive API

java

android

android-studio

onactivityresult

google-drive-android-api