如何通过编程触发KeygaurdManager采集指纹

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

KeyguardManager keyguardManager = (KeyguardManager) getSystemService(Context.KEYGUARD_SERVICE);

if (keyguardManager.isKeyguardSecure() && keyguardManager.isDeviceSecure()) {
    // 设备支持指纹识别
} else {
    // 设备不支持指纹识别
}

FingerprintManager.AuthenticationCallback authenticationCallback = new FingerprintManager.AuthenticationCallback() {
    @Override
    public void onAuthenticationError(int errorCode, CharSequence errString) {
        // 指纹识别错误
    }

    @Override
    public void onAuthenticationHelp(int helpCode, CharSequence helpString) {
        // 指纹识别帮助
    }

    @Override
    public void onAuthenticationSucceeded(FingerprintManager.AuthenticationResult result) {
        // 指纹识别成功
    }

    @Override
    public void onAuthenticationFailed() {
        // 指纹识别失败
    }
};

FingerprintManager.CryptoObject cryptoObject = new FingerprintManager.CryptoObject(cipher);

FingerprintManager fingerprintManager = (FingerprintManager) getSystemService(Context.FINGERPRINT_SERVICE);
fingerprintManager.authenticate(cryptoObject, cancellationSignal, 0, authenticationCallback, null);