122 lines
4.1 KiB
Java
122 lines
4.1 KiB
Java
/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License
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*/
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package com.android.settings;
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import android.hardware.fingerprint.FingerprintManager;
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import android.os.CancellationSignal;
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import android.os.Vibrator;
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import android.view.View;
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import android.widget.ImageView;
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import android.widget.TextView;
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/**
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* Small helper class to manage text/icon around fingerprint authentication UI.
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*/
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public class FingerprintUiHelper extends FingerprintManager.AuthenticationCallback {
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private static final long ERROR_TIMEOUT = 1300;
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private static final long[] FP_ERROR_VIBRATE_PATTERN = new long[] {0, 30, 100, 30};
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private static final long[] FP_SUCCESS_VIBRATE_PATTERN = new long[] {0, 30};
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private ImageView mIcon;
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private TextView mErrorTextView;
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private CancellationSignal mCancellationSignal;
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private Callback mCallback;
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private FingerprintManager mFingerprintManager;
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public FingerprintUiHelper(ImageView icon, TextView errorTextView, Callback callback) {
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mFingerprintManager = icon.getContext().getSystemService(FingerprintManager.class);
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mIcon = icon;
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mErrorTextView = errorTextView;
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mCallback = callback;
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}
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public void startListening() {
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if (mFingerprintManager.getEnrolledFingerprints().size() > 0) {
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mCancellationSignal = new CancellationSignal();
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mFingerprintManager.authenticate(null, mCancellationSignal, this, 0 /* flags */);
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setFingerprintIconVisibility(true);
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mIcon.setImageResource(R.drawable.ic_fingerprint);
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}
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}
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public void stopListening() {
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if (mCancellationSignal != null) {
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mCancellationSignal.cancel();
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mCancellationSignal = null;
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}
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}
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private void setFingerprintIconVisibility(boolean visible) {
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mIcon.setVisibility(visible ? View.VISIBLE : View.GONE);
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mCallback.onFingerprintIconVisibilityChanged(visible);
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}
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@Override
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public void onAuthenticationError(int errMsgId, CharSequence errString) {
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showError(errString);
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setFingerprintIconVisibility(false);
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}
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@Override
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public void onAuthenticationHelp(int helpMsgId, CharSequence helpString) {
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showError(helpString);
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}
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@Override
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public void onAuthenticationFailed() {
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showError(mIcon.getResources().getString(
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R.string.fingerprint_not_recognized));
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}
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@Override
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public void onAuthenticationSucceeded(FingerprintManager.AuthenticationResult result) {
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vibrateFingerprintSuccess();
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mCallback.onAuthenticated();
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}
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private void showError(CharSequence error) {
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vibrateFingerprintError();
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mIcon.setImageResource(R.drawable.ic_fingerprint_error);
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mErrorTextView.setText(error);
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mErrorTextView.removeCallbacks(mResetErrorTextRunnable);
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mErrorTextView.postDelayed(mResetErrorTextRunnable, ERROR_TIMEOUT);
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}
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private void vibrateFingerprintError() {
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mIcon.getContext().getSystemService(Vibrator.class).vibrate(FP_ERROR_VIBRATE_PATTERN, -1);
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}
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private void vibrateFingerprintSuccess() {
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mIcon.getContext().getSystemService(Vibrator.class).vibrate(FP_SUCCESS_VIBRATE_PATTERN, -1);
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}
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private Runnable mResetErrorTextRunnable = new Runnable() {
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@Override
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public void run() {
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mErrorTextView.setText("");
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mIcon.setImageResource(R.drawable.ic_fingerprint);
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}
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};
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public interface Callback {
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void onAuthenticated();
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void onFingerprintIconVisibilityChanged(boolean visible);
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}
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}
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