How to show in the button text that the phone has or does not have Fingerprint?

Question

How can I check if a device has a fingerprint sensor, and if it does not, how can I show that it does not?

I have this code and it works well on cellphones that don't have a fingerprint sensor, but does not work on fingerprint sensor phones. The text continues to show that the phone has no fingerprint. How can I fix this?

FingerprintManagerCompat fingerprintManagerCompat = FingerprintManagerCompat.from(getApplicationContext());
if (!fingerprintManagerCompat.isHardwareDetected()) {
    // O dispositivo não suporta a autenticação de impressão digital
    BtnActionFingerprint.setEnabled(false);
    BtnActionFingerprint.setText(R.string.button_title_fingerprint_not_supported);
} else
    if (!fingerprintManagerCompat.hasEnrolledFingerprints()) {
        // O usuário não registrou nenhuma impressão digital para autenticar com
        BtnActionFingerprint.setEnabled(false);
        BtnActionFingerprint.setText(R.string.button_title_fingerprint_supported_but_unavaliable);
    } else {
        // Tudo está pronto para a autenticação de impressão digital 
        BtnActionFingerprint.setEnabled(true);
        BtnActionFingerprint.setText(R.string.button_title_fingerprint_supported);
    }

Hope [this](https://stackoverflow.com/questions/34409969/how-to-check-device-compatibility-for-finger-print-authentication-in-android) will help you to solve your problem. — Naveed Akhtar, Oct 26 '17 at 13:14
Possible duplicate of [How to check device compatibility for finger print authentication in android](https://stackoverflow.com/questions/34409969/how-to-check-device-compatibility-for-finger-print-authentication-in-android) — manish, Feb 04 '19 at 08:48

score 1 · Answer 1 · edited Feb 04 '19 at 08:48

Simply you achieve by doing this:

 try {
      Button btn=(Button)findViewbyId(R.id.btn);
        FingerprintManagerCompat fingerprintManagerCompat = FingerprintManagerCompat.from(MainActivity.this);
        if (!fingerprintManagerCompat.isHardwareDetected()) {
            // Device doesn't support fingerprint authentication
            Toast.makeText(this, "device not support", Toast.LENGTH_SHORT).show();
            btn.setText("Device not supported");
        } else if (!fingerprintManagerCompat.hasEnrolledFingerprints()) {
            // User hasn't enrolled any fingerprints to authenticate with
            Toast.makeText(this, "not enrolled", Toast.LENGTH_SHORT).show();
            btn.setText("Device not Enrolled");
        } else {
            Toast.makeText(this, "ready to use fingerPrint", Toast.LENGTH_SHORT).show();
            // Everything is ready for fingerprint authentication
         btn.setText("Ready to use fingerprint");
        }
    }catch (Exception e){
        e.printStackTrace();
        Log.e("130",">>>"+e+"<<<<<");
    }

Here is a screenshot which clears your all doubts

In my works this method, but I wanted to use the message on a Button, taking out the Toast. Can you do that? along with the strings predefined within the strings.xml — Micahel Keller, Oct 26 '17 at 21:05

score 0 · Answer 2 · answered Oct 26 '17 at 08:22

0

Maybe you miss permission in Manifest:

<uses-permission
    android:name="android.permission.USE_FINGERPRINT" />

answered Oct 26 '17 at 08:22

LaurentY

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How to show in the button text that the phone has or does not have Fingerprint?

2 Answers2