[英]How to move to second layout in android after fingerprint authentication successful
I have made the first layout in android as fingerprint authentication and it has successfully authenticate my fingerprint but how to make it move from the fingerprint layout directly to the second layout... 我已经在Android中将第一个布局作为指纹身份验证,它已经成功验证了我的指纹,但是如何使它从指纹布局直接移至第二个布局...
Please anyone help me....... 请任何人帮助我.......
This is the coding of FingerprintAuthenticationActivity.java : 这是FingerprintAuthenticationActivity.java的编码:
public class FingerprintAuthenticationActivity extends AppCompatActivity {
private static final String KEY_NAME = "example_key";
private FingerprintManager fingerprintManager;
private KeyguardManager keyguardManager;
private KeyStore keyStore;
private KeyGenerator keyGenerator;
private Cipher cipher;
private FingerprintManager.CryptoObject cryptoObject;
private FingerprintHandler fingerprintHandler;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_fingerprint_authentication);
keyguardManager = (KeyguardManager) getSystemService(KEYGUARD_SERVICE);
fingerprintManager = (FingerprintManager) getSystemService(FINGERPRINT_SERVICE);
if (!keyguardManager.isKeyguardSecure()) {
Toast.makeText(this, "Lock screen security not enabled in Settings",
Toast.LENGTH_LONG).show();
return;
}
if (ActivityCompat.checkSelfPermission(this,
Manifest.permission.USE_FINGERPRINT) != PackageManager.PERMISSION_GRANTED) {
Toast.makeText(this, "Fingerprint authentication permission not enabled",
Toast.LENGTH_LONG).show();
return;
}
if (!fingerprintManager.hasEnrolledFingerprints()) {
// This happens when no fingerprints are registered.
Toast.makeText(this, "Register at least one fingerprint in Settings",
Toast.LENGTH_LONG).show();
return;
}
generateKey();
if (cipherInit()) {
cryptoObject = new FingerprintManager.CryptoObject(cipher);
FingerprintHandler helper = new FingerprintHandler(this);
helper.startAuth(fingerprintManager,cryptoObject);
}
}
protected void generateKey() {
try {
keyStore = KeyStore.getInstance("AndroidKeyStore");
} catch (Exception e) {
e.printStackTrace();
}
try {
keyGenerator = KeyGenerator.getInstance(KeyProperties.KEY_ALGORITHM_AES,
"AndroidKeyStore");
} catch (NoSuchAlgorithmException | NoSuchProviderException e) {
throw new RuntimeException("Failed to get KeyGenerator instance", e);
}
try {
keyStore.load(null);
keyGenerator.init(new KeyGenParameterSpec.Builder(KEY_NAME, KeyProperties.PURPOSE_ENCRYPT | KeyProperties.PURPOSE_DECRYPT)
.setBlockModes(KeyProperties.BLOCK_MODE_CBC)
.setUserAuthenticationRequired(true)
.setEncryptionPaddings(KeyProperties.ENCRYPTION_PADDING_PKCS7)
.build());
keyGenerator.generateKey();
} catch (NoSuchAlgorithmException | InvalidAlgorithmParameterException | CertificateException | IOException e) {
throw new RuntimeException(e);
}
}
public boolean cipherInit() {
try {
cipher = Cipher.getInstance(KeyProperties.KEY_ALGORITHM_AES + "/" + KeyProperties.BLOCK_MODE_CBC + "/"
+ KeyProperties.ENCRYPTION_PADDING_PKCS7);
} catch (NoSuchAlgorithmException | NoSuchPaddingException e) {
throw new RuntimeException("Failed to get Cipher", e);
}
try {
keyStore.load(null);
SecretKey key = (SecretKey) keyStore.getKey(KEY_NAME,null);
cipher.init(Cipher.ENCRYPT_MODE, key);
return true;
} catch (KeyPermanentlyInvalidatedException e) {
return false;
} catch (KeyStoreException | CertificateException | UnrecoverableKeyException | IOException
| NoSuchAlgorithmException | InvalidKeyException e) {
throw new RuntimeException("Failed to init Cipher", e);
}
}
}
This is FingerprintHandler.java : 这是FingerprintHandler.java:
public class FingerprintHandler extends FingerprintManager.AuthenticationCallback {
private CancellationSignal cancellationSignal;
private Context appContext;
public FingerprintHandler(Context context) {
appContext = context;}
public void startAuth(FingerprintManager manager, FingerprintManager.CryptoObject cryptoObject) {
cancellationSignal = new CancellationSignal();
if (ActivityCompat.checkSelfPermission(appContext, Manifest.permission.USE_FINGERPRINT) !=
PackageManager.PERMISSION_GRANTED) {
return;
}
manager.authenticate(cryptoObject, cancellationSignal, 0, this, null);
}
@Override
public void onAuthenticationError(int errMsgId,
CharSequence errString) {
Toast.makeText(appContext,
"Authentication error\n" + errString,
Toast.LENGTH_LONG).show();
}
@Override
public void onAuthenticationHelp(int helpMsgId,
CharSequence helpString) {
Toast.makeText(appContext,
"Authentication help\n" + helpString,
Toast.LENGTH_LONG).show();
}
@Override
public void onAuthenticationFailed() {
Toast.makeText(appContext,
"Authentication failed.",
Toast.LENGTH_LONG).show();
}
@Override
public void onAuthenticationSucceeded(
FingerprintManager.AuthenticationResult result) {
Toast.makeText(appContext,
"Authentication succeeded.",
Toast.LENGTH_LONG).show();
}
}
This is the second layout that I need to move after fingerprint success EmployeeLoginActivity.java : 这是指纹成功EmployeeLoginActivity.java之后我需要移动的第二个布局:
public class EmployeeLoginActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_employee_login);
}
}
Something like this should work to start the new Activity
on a successful authentication: 这样的事情应该可以在成功的身份验证上启动新的Activity
:
@Override
public void onAuthenticationSucceeded(
FingerprintManager.AuthenticationResult result) {
Toast.makeText(appContext,
"Authentication succeeded.",
Toast.LENGTH_LONG).show();
appContext.startActivity(new Intent(appContext,
EmployeeLoginActivity.class));
}
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