LoginActivity.java

public class LoginActivity extends AppCompatActivity {
    // AccountAuthService provides a set of APIs, including silentSignIn, getSignInIntent, and signOut.
    private AccountAuthService mAuthService;

    // Set HUAWEI ID sign-in authorization parameters.
    private AccountAuthParams mAuthParam;

    // Define the request code for signInIntent.
    private static final int REQUEST_CODE_SIGN_IN = 1000;

    // Define the log flag.
    private static final String TAG = "Account";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login);
        findViewById(R.id.challenge_silent_signin).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                silentSignInByHwId();
            }
        });
    }



    /**
     * Silent sign-in: If a user has authorized your app and signed in, no authorization or sign-in screen will appear during subsequent sign-ins, and the user will directly sign in.
     * After a successful silent sign-in, the HUAWEI ID information will be returned in the success event listener.
     * If the user has not authorized your app or signed in, the silent sign-in will fail. In this case, your app will show the authorization or sign-in screen to the user.
     */
    private void silentSignInByHwId() {
        mAuthParam = new AccountAuthParamsHelper(AccountAuthParams.DEFAULT_AUTH_REQUEST_PARAM)
                .setEmail()
                .setIdToken()
                .createParams();
        mAuthService = AccountAuthManager.getService(this, mAuthParam);
        // Sign in with a HUAWEI ID silently.
        Task<AuthAccount> task = mAuthService.silentSignIn();
        task.addOnSuccessListener(new OnSuccessListener<AuthAccount>() {
            @Override
            public void onSuccess(AuthAccount authAccount) {
                dealWithResultOfSignIn(authAccount);
            }
        });
        task.addOnFailureListener(new OnFailureListener() {
            @Override
            public void onFailure(Exception e) {
                Toast.makeText(LoginActivity.this, e.toString(), Toast.LENGTH_SHORT).show();
                if (e instanceof ApiException) {
                    ApiException apiException = (ApiException) e;
                    Intent signInIntent = mAuthService.getSignInIntent();
                    signInIntent.putExtra(CommonConstant.RequestParams.IS_FULL_SCREEN, true);
                    startActivityForResult(signInIntent, REQUEST_CODE_SIGN_IN);
                }
            }
        });
    }

    private void dealWithResultOfSignIn(AuthAccount authAccount) {
        if (authAccount.getIdToken() != null) {
            Toast.makeText(this, "idToken:" + authAccount.getIdToken(), Toast.LENGTH_SHORT).show();
            Intent i = new Intent(getBaseContext(), MovieSearchActivity.class);
            startActivity(i);
        }
        else {
            Toast.makeText(this, "ID Token is not found!", Toast.LENGTH_SHORT).show();
        }
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == REQUEST_CODE_SIGN_IN) {
            Log.i(TAG, "onActivitResult of sigInInIntent, request code: " + REQUEST_CODE_SIGN_IN);
            Task<AuthAccount> authAccountTask = AccountAuthManager.parseAuthResultFromIntent(data);
            if (authAccountTask.isSuccessful()) {
                // The sign-in is successful, and the authAccount object that contains the HUAWEI ID information is obtained.
                AuthAccount authAccount = authAccountTask.getResult();
                dealWithResultOfSignIn(authAccount);
                Log.i(TAG, "onActivitResult of sigInInIntent, request code: " + REQUEST_CODE_SIGN_IN);
            } else {
                // The sign-in fails. Find the cause from the status code. For more information, please refer to Error Codes.
                Log.e(TAG, "sign in failed : " +((ApiException)authAccountTask.getException()).getStatusCode());
            }
        }
    }

}