Example usage for android.hardware.fingerprint FingerprintManager authenticate

Introduction

In this page you can find the example usage for android.hardware.fingerprint FingerprintManager authenticate.

Prototype

public void authenticate(@NonNull CancellationSignal cancel, @NonNull Bundle bundle,
        @NonNull @CallbackExecutor Executor executor, @NonNull IBiometricPromptReceiver receiver,
        @NonNull BiometricAuthenticator.AuthenticationCallback callback) 

Source Link

Document

Private method, see BiometricPrompt#authenticate(CancellationSignal,Executor,BiometricPrompt.AuthenticationCallback)

Usage

From source file:com.owncloud.android.ui.activity.FingerprintActivity.java

private void startFingerprint() {
    TextView fingerprintTextView = (TextView) findViewById(R.id.scanfingerprinttext);

    FingerprintManager fingerprintManager = (FingerprintManager) MainApp.getAppContext()
            .getSystemService(Context.FINGERPRINT_SERVICE);

    if (ActivityCompat.checkSelfPermission(this,
            Manifest.permission.USE_FINGERPRINT) != PackageManager.PERMISSION_GRANTED) {
        return;/*w  w w  . ja v a  2  s.co  m*/
    }
    KeyguardManager keyguardManager = (KeyguardManager) getSystemService(KEYGUARD_SERVICE);

    if (!keyguardManager.isKeyguardSecure()) {
        return;
    } else {
        generateKey();

        if (cipherInit()) {
            cryptoObject = new FingerprintManager.CryptoObject(cipher);
            FingerprintHandler.Callback callback = new FingerprintHandler.Callback() {
                @Override
                public void onAuthenticated() {
                    fingerprintResult(true);
                }

                @Override
                public void onFailed(String error) {
                    Toast.makeText(MainApp.getAppContext(), error, Toast.LENGTH_LONG).show();
                    ImageView imageView = (ImageView) findViewById(R.id.fingerprinticon);
                    int[][] states = new int[][] { new int[] { android.R.attr.state_activated },
                            new int[] { -android.R.attr.state_activated } };
                    int[] colors = new int[] { Color.parseColor("#FF0000"), Color.RED };
                    ColorStateList csl = new ColorStateList(states, colors);
                    Drawable drawable = DrawableCompat.wrap(imageView.getDrawable());
                    DrawableCompat.setTintList(drawable, csl);
                    imageView.setImageDrawable(drawable);
                }
            };

            helper = new FingerprintHandler(fingerprintTextView, callback);
            cancellationSignal = new CancellationSignal();
            if (ActivityCompat.checkSelfPermission(MainApp.getAppContext(),
                    Manifest.permission.USE_FINGERPRINT) != PackageManager.PERMISSION_GRANTED) {
                return;
            }
            fingerprintManager.authenticate(cryptoObject, cancellationSignal, 0, helper, null);
        }
    }
}

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