如何在android 11中检测指纹硬件

Question

如何检测手机是否有指纹硬件。我要一个能检测指纹硬件的代码。

我使用了这段代码，但是这段代码在"isHardwareDetected()“这个方法上显示了一个错误。

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
    //Fingerprint API only available on from Android 6.0 (M)
    FingerprintManager fingerprintManager = (FingerprintManager) context.getSystemService(Context.FINGERPRINT_SERVICE);
    if (!fingerprintManager.isHardwareDetected()) { 
        // Device doesn't support fingerprint authentication     
    } else if (!fingerprintManager.hasEnrolledFingerprints()) { 
        // User hasn't enrolled any fingerprints to authenticate with 
    } else { 
        // Everything is ready for fingerprint authentication 
    }
}

Answer 1

我在问题代码中做了一个小改动，现在它工作得很好。

但"FingerprintManagerCompat“类已被弃用

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            val manager = FingerprintManagerCompat.from(this)
            if (!manager.isHardwareDetected) {
                Log.e("tag","Fingerprint hardware not detected.")
            } else if (!manager.hasEnrolledFingerprints()) {
                Log.e("tag","No fingerprint is set")
            } else {
                Log.e("tag","Fingerprint is set")
            }
        }

Answer 2

我也试过了，效果很好

f (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        val fingerprintManager = FingerprintManagerCompat.from(this)
        if (!fingerprintManager .isHardwareDetected) {
            Log.e("tag","not detected.")
        } else if (!fingerprintManager .hasEnrolledFingerprints()) {
            Log.e("tag","No fingerprint is set")
        } else {
            Log.e("tag","Fingerprint is set")
        }
    }