How to use

from

method

in

android.support.v4.hardware.fingerprint.FingerprintManagerCompat

  return;
FingerprintManagerCompat managerCompat = FingerprintManagerCompat.from(context);
if (!managerCompat.isHardwareDetected()) { //判断设备是否支持
  if (listener != null)

@Provides
public FingerprintManagerCompat providesFingerprintManager(Context context) {
  return FingerprintManagerCompat.from(context);
}

  /**
   * Check if the device have supported hardware fir the finger print scanner.
   *
   * @param context instance of the caller.
   * @return true if device have the hardware.
   */
  public static boolean isSupportedHardware(Context context) {
    FingerprintManagerCompat fingerprintManager = FingerprintManagerCompat.from(context);
    return fingerprintManager.isHardwareDetected();
  }
}

private boolean isFingerPrintReady(Context context) {
  return FingerprintManagerCompat.from(context).hasEnrolledFingerprints();
}

private boolean isFingerprintApiAvailable(Context context) {
  return FingerprintManagerCompat.from(context).isHardwareDetected();
}

private boolean isFingerPrintAvailable(Context context) {
  return FingerprintManagerCompat.from(context).isHardwareDetected();
}

private boolean isFingerprintsExists(Context context) {
  return FingerprintManagerCompat.from(context).hasEnrolledFingerprints();
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
             Bundle savedInstanceState) {
  getDialog().setTitle(getString(R.string.sign_in_pf));
  View v = inflater.inflate(R.layout.view_pf_fingerprint_dialog_container, container,
      false);
  mCancelButton = v.findViewById(R.id.cancel_button);
  mCancelButton.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
      dismiss();
    }
  });
  mFingerprintContent = v.findViewById(R.id.fingerprint_container);
  FingerprintManagerCompat manager = FingerprintManagerCompat.from(getContext());
  mFingerprintCallback = new PFFingerprintUIHelper(manager,
      (ImageView) v.findViewById(R.id.fingerprint_icon),
      (TextView) v.findViewById(R.id.fingerprint_status),
      mAuthListener);
  updateStage();
  return v;
}

fingerprintManager = FingerprintManagerCompat.from(this);

/**
 * Check if the finger print hardware is available.
 *
 * @param context instance of the caller.
 * @return true if finger print authentication is supported.
 */
private boolean checkFingerPrintAvailability(@NonNull Context context) {
  // 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)
    FingerprintManagerCompat fingerprintManager = FingerprintManagerCompat.from(context);
    if (!fingerprintManager.isHardwareDetected()) {
      // Device doesn't support fingerprint authentication
      mCallback.onNoFingerPrintHardwareFound();
      return false;
    } else if (!fingerprintManager.hasEnrolledFingerprints()) {
      // User hasn't enrolled any fingerprints to authenticate with
      mCallback.onNoFingerPrintRegistered();
      return false;
    }
    return true;
  } else {
    mCallback.onBelowMarshmallow();
    return false;
  }
}