如何在 android 中检查指纹认证的设备兼容性

Question

我正在使用 android 6.0 api 进行指纹认证。我的要求是，如果当前设备支持指纹认证，那么我将通过指纹认证，否则将使用正常方式登录应用程序。

所以，任何人都可以告诉我，如何在 android 中检查指纹认证的设备兼容性。

提前致谢。

Answer 1

您必须在 FingerprintManager class 上使用方法 isHardwareDetected。

Determine if fingerprint hardware is present and functional. Returns true if hardware is present and functional, false otherwise.

// Check if we're running on Android 6.0 (M) or higher
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 
    }
}

不要忘记在 AndroidManifest 中添加访问指纹功能的权限。由于 API 28:

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

之前 API28:

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

有支持库

如果您不想检查Build.VERSION，也可以在低于Android 6.0 的设备上使用支持库

检查

添加依赖：

compile "com.android.support:support-v4:23.0.0"

并像这样使用 FingerprintManagerCompat class：

FingerprintManagerCompat fingerprintManagerCompat = FingerprintManagerCompat.from(context);

if (!fingerprintManagerCompat.isHardwareDetected()) { 
    // Device doesn't support fingerprint authentication     
} else if (!fingerprintManagerCompat.hasEnrolledFingerprints()) { 
    // User hasn't enrolled any fingerprints to authenticate with 
} else { 
    // Everything is ready for fingerprint authentication 
}

Answer 2

只是跟进 LaurentY 的回答。您需要获得访问指纹扫描仪的权限。为此，您需要将其添加到您的清单中。

API 27 岁及之前

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

API 28 岁及以后

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

Answer 3

此方法适用于所有 Android 版本并检查权限

 private boolean isSensorAvialable() {
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                return ActivityCompat.checkSelfPermission(AppContext, Manifest.permission.USE_FINGERPRINT) == PackageManager.PERMISSION_GRANTED &&
                        AppContext.getSystemService(FingerprintManager.class).isHardwareDetected();
            } else {
                return FingerprintManagerCompat.from(AppContext).isHardwareDetected();
            }
        }

Answer 4

实施 BiometricPrompt 无需许可：

    FingerprintManagerCompat fingerprintManagerCompat = FingerprintManagerCompat.from (context);

if (! fingerprintManagerCompat.isHardwareDetected ()) {
     // Device doesn't support fingerprint authentication
} else if (! fingerprintManagerCompat.hasEnrolledFingerprints ()) {
     // User hasn't enrolled any fingerprints to authenticate with
} else {
     // Everything is ready for fingerprint authentication
}
    [BiometricPrompt][1]

如何在 android 中检查指纹认证的设备兼容性

How to check device compatibility for finger print authentication in android

android

authentication

fingerprint