如何在一键登录中使用 Google Activity Result API

Question

在我的 Android 应用程序之一中，我尝试按照示例https://developers.google.com/identity/one-tap/android/get-saved-credentials#disable-one-tap包含一键登录身份验证。但是，这里https://developer.android.com/reference/androidx/activity/ComponentActivity#startActivityForResult(android.content.Intent,int)表示函数 startActivityForResult 已被弃用，并使用函数 registerForActivityResult 传入 StartActivityForResult ActivityResultContract 的对象。在其他示例的帮助下，我可以编写以下代码

 public class MainActivity extends AppCompatActivity {


    private SignInClient oneTapClient;
    private BeginSignInRequest signInRequest;

    private ActivityResultLauncher<Intent> loginResultHandler = registerForActivityResult(new ActivityResultContracts.StartActivityForResult(), result -> {
        // handle intent result here
        if (result.getResultCode() == RESULT_OK) {
            SignInCredential credential = null;
            try {
                credential = oneTapClient.getSignInCredentialFromIntent(result.getData());
                String idToken = credential.getGoogleIdToken();
                String username = credential.getId();
                String password = credential.getPassword();
                if (idToken != null) {
                    // Got an ID token from Google. Use it to authenticate
                    // with your backend.
                    Log.d(TAG, "Got ID token.");
                } else if (password != null) {
                    // Got a saved username and password. Use them to authenticate
                    // with your backend.
                    Log.d(TAG, "Got password.");
                }
            } catch (ApiException e) {
                e.printStackTrace();
            }
        }
        else {
            //...
        }
    });

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        //...

        oneTapClient.beginSignIn(signInRequest)
                .addOnSuccessListener(this, new OnSuccessListener<BeginSignInResult>() {
                    @Override
                    public void onSuccess(BeginSignInResult result) {
                       /*try {
                           android.app.Activity.startIntentSenderForResult(result.getPendingIntent().getIntentSender(), REQ_ONE_TAP,
                                    null, 0, 0, 0);
                        } catch (IntentSender.SendIntentException e) {
                            Log.e(TAG, "Couldn't start One Tap UI: " + e.getLocalizedMessage());
                        }*/
                        loginResultHandler.launch(result.getPendingIntent().getIntentSender());
                    }
                })
                .addOnFailureListener(this, new OnFailureListener() {
                    @Override
                    public void onFailure(@NonNull Exception e) {
                        // No saved credentials found. Launch the One Tap sign-up flow, or
                        // do nothing and continue presenting the signed-out UI.
                        Log.d(TAG, e.getLocalizedMessage());
                    }
                });
    }
}

只是我不知道如何根据Google Activity Result API转换指令loginResultHandler.launch(result.getPendingIntent().getIntentSender())（getIntentSender()返回一个IntentSender，但loginResultHandler.launch()需要一个Intent） 。有人能帮助我或链接我的工作示例吗？谢谢。

编辑： 最后，我用以下方式重写了代码（我已经测试了帐户选择屏幕并且它有效）：

public class MainActivity extends AppCompatActivity {

   private static final String TAG = "MainActivity";
    private SignInClient oneTapClient;
    private BeginSignInRequest signInRequest;
    private boolean showOneTapUI = true;

    private ActivityResultLauncher<IntentSenderRequest> loginResultHandler = registerForActivityResult(new ActivityResultContracts.StartIntentSenderForResult(), result -> {
        // handle intent result here
        if (result.getResultCode() == RESULT_OK) Log.d(TAG, "RESULT_OK.");
        if (result.getResultCode() == RESULT_CANCELED) Log.d(TAG, "RESULT_CANCELED.");
        if (result.getResultCode() == RESULT_FIRST_USER) Log.d(TAG, "RESULT_FIRST_USER.");
            try {
                SignInCredential credential = oneTapClient.getSignInCredentialFromIntent(result.getData());
                String idToken = credential.getGoogleIdToken();
                String username = credential.getId();
                String password = credential.getPassword();
                if (idToken !=  null) {
                    // Got an ID token from Google. Use it to authenticate
                    // with your backend.
                    Log.d(TAG, "Got ID token.");
                } else if (password != null) {
                    // Got a saved username and password. Use them to authenticate
                    // with your backend.
                    Log.d(TAG, "Got password.");
                }
            } catch (ApiException e) {
                switch (e.getStatusCode()) {
                    case CommonStatusCodes.CANCELED:
                        Log.d(TAG, "One-tap dialog was closed.");
                        // Don't re-prompt the user.
                        showOneTapUI = false;
                        break;
                    case CommonStatusCodes.NETWORK_ERROR:
                        Log.d(TAG, "One-tap encountered a network error.");
                        // Try again or just ignore.
                        break;
                    default:
                        Log.d(TAG, "Couldn't get credential from result."
                                + e.getLocalizedMessage());
                        break;
                }
            }
    });

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        //...

        oneTapClient.beginSignIn(signInRequest)
                .addOnSuccessListener(this, new OnSuccessListener<BeginSignInResult>() {
                    @Override
                    public void onSuccess(BeginSignInResult result) {
                        try {
                            loginResultHandler.launch(new IntentSenderRequest.Builder(result.getPendingIntent().getIntentSender()).build());
                        } catch(android.content.ActivityNotFoundException e){
                            e.printStackTrace();
                            Log.e(TAG, "Couldn't start One Tap UI: " + e.getLocalizedMessage());
                        }
                    }
                })
                .addOnFailureListener(this, new OnFailureListener() {
                    @Override
                    public void onFailure(@NonNull Exception e) {
                        // No saved credentials found. Launch the One Tap sign-up flow, or
                        // do nothing and continue presenting the signed-out UI.
                        Log.d(TAG, e.getLocalizedMessage());
                    }
                });
    }
}

Answer 1

您可以使用ActivityResultContracts.StartIntentSenderForResult类来代替ActivityResultContracts.StartActivityForResult

因此你可以将你的代码重构为这样的东西，

ActivityResultLauncher<IntentSenderRequest>首先定义当使用实例而不是ActivityResultLauncher<Intent>实例给你结果时要做什么

private ActivityResultLauncher<IntentSenderRequest> loginResultHandler = registerForActivityResult(new ActivityResultContracts.StartIntentSenderForResult(), result -> {
        // handle intent result here
        if (result.getResultCode() == RESULT_OK) {
            SignInCredential credential = null;
            try {
                credential = oneTapClient.getSignInCredentialFromIntent(result.getData());
                String idToken = credential.getGoogleIdToken();
                String username = credential.getId();
                String password = credential.getPassword();
                if (idToken != null) {
                    // Got an ID token from Google. Use it to authenticate
                    // with your backend.
                    Log.d(TAG, "Got ID token.");
                } else if (password != null) {
                    // Got a saved username and password. Use them to authenticate
                    // with your backend.
                    Log.d(TAG, "Got password.");
                }
            } catch (ApiException e) {
                e.printStackTrace();
            }
        }
        else {
            //...
        }
    });

现在，正如onCreate您在代码中提到的那样，您可以使用IntentSenderRequest.Builder类将IntentSender实例转换为方法IntentSenderRequest中将接受的实例launch

oneTapClient.beginSignIn(signInRequest)
                .addOnSuccessListener(this, new OnSuccessListener<BeginSignInResult>() {
                    @Override
                    public void onSuccess(BeginSignInResult result) {
                     

                        try{
                            loginResultHandler.launch(new IntentSenderRequest.Builder(result.getPendingIntent().getIntentSender()).build());
                           }catch(IntentSenderException e){
                              e.printStackTrace()
                            }
                        
                    }
                })
                .addOnFailureListener(this, new OnFailureListener() {
                    @Override
                    public void onFailure(@NonNull Exception e) {
                        // No saved credentials found. Launch the One Tap sign-up flow, or
                        // do nothing and continue presenting the signed-out UI.
                        Log.d(TAG, e.getLocalizedMessage());
                    }
                });
    }

确保将其包装在一个try-catch构造中，并且它应该是它。

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