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私は、画面がロック解除された後にアプリに戻るたびに、ユーザーを認証するためにアプリでFingerprintManagerを使用しています。初めて正常に動作したとき、次に指紋操作がキャンセルされたことを示します。アプリ内認証を使用中に指紋操作がキャンセルされる
は、ここに私のコードです：センサは前回の操作によって占有されているとき
public class FingerprintHandler extends FingerprintManager.AuthenticationCallback
{
private AlertDialog.Builder dialogBuilder;
private AlertDialog b;
private TextView text_state;
private ImageView image_state;
View view;
private Context context;
public FingerprintHandler(Context mContext, View mView) {
context = mContext;
this.view = mView;
dialogBuilder = new AlertDialog.Builder(context);
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
final View dialogView = inflater.inflate(R.layout.custom_fingerprint_auth_dialog, null);
text_state = (TextView) dialogView.findViewById(R.id.text_state);
image_state = (ImageView) dialogView.findViewById(R.id.image_state);
// view = inflater.inflate(R.layout.activity_passcode, null);
dialogBuilder.setView(dialogView);
dialogBuilder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
dialog.dismiss();
}
});
dialogBuilder.setPositiveButton("Use Password", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
PasscodeActivity.enterPassword(view, context);
}
});
b = dialogBuilder.create();
b.show();
b.setCancelable(false);
b.setCanceledOnTouchOutside(false);
}
//Implement the startAuth method, which is responsible for starting the fingerprint authentication process//
public void startAuth(FingerprintManager manager, FingerprintManager.CryptoObject cryptoObject) {
CancellationSignal cancellationSignal = new CancellationSignal();
if (ActivityCompat.checkSelfPermission(context, Manifest.permission.USE_FINGERPRINT) != PackageManager.PERMISSION_GRANTED) {
return;
}
manager.authenticate(cryptoObject, cancellationSignal, 0, this, null);
}
@Override
//onAuthenticationError is called when a fatal error has occurred. It provides the error code and error message as its parameters//
public void onAuthenticationError(int errMsgId, CharSequence errString) {
//I’m going to display the results of fingerprint authentication as a series of toasts.
//Here, I’m creating the message that’ll be displayed if an error occurs//
if (errMsgId != FINGERPRINT_ERROR_CANCELED) {
text_state.setText(errString);
Log.e("ERROR", "" + errString);
image_state.setImageResource(R.drawable.ic_fingerprint_failure);
text_state.setTextColor(context.getResources().getColor(R.color.notVerified));
//Toast.makeText(context, "Authentication error\n" + errString, Toast.LENGTH_LONG).show();
}
}
@Override
//onAuthenticationFailed is called when the fingerprint doesn’t match with any of the fingerprints registered on the device//
public void onAuthenticationFailed() {
text_state.setText(context.getString(R.string.fingerFailure));
image_state.setImageResource(R.drawable.ic_fingerprint_failure);
text_state.setTextColor(context.getResources().getColor(R.color.notVerified));
//Toast.makeText(context, "Authentication failed", Toast.LENGTH_LONG).show();
}
@Override
//onAuthenticationHelp is called when a non-fatal error has occurred. This method provides additional information about the error,
//so to provide the user with as much feedback as possible I’m incorporating this information into my toast//
public void onAuthenticationHelp(int helpMsgId, CharSequence helpString) {
text_state.setText(helpString);
Log.e("HELP",""+helpString);
image_state.setImageResource(R.drawable.ic_fingerprint_failure);
text_state.setTextColor(context.getResources().getColor(R.color.notVerified));
//Toast.makeText(context, "Authentication help\n" + helpString, Toast.LENGTH_LONG).show();
}
@Override
//onAuthenticationSucceeded is called when a fingerprint has been successfully matched to one of the fingerprints stored on the user’s device//
public void onAuthenticationSucceeded(
FingerprintManager.AuthenticationResult result) {
text_state.setText(context.getString(R.string.fingerSuccess));
image_state.setImageResource(R.drawable.ic_fingerprint_success);
text_state.setTextColor(context.getResources().getColor(R.color.colorPrimaryDark));
Activity activity = (Activity) context;
activity.finish();
b.dismiss();
//Toast.makeText(context, "Success!", Toast.LENGTH_LONG).show();
}
}