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/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License
*/
package com.android.settings.fingerprint;
import android.annotation.Nullable;
import android.app.Activity;
import android.app.Fragment;
import android.hardware.fingerprint.FingerprintManager;
import android.os.Bundle;
import android.os.CancellationSignal;
import android.os.Handler;
import com.android.internal.logging.MetricsLogger;
import com.android.settings.ChooseLockSettingsHelper;
import com.android.settings.InstrumentedFragment;
/**
* Sidecar fragment to handle the state around fingerprint enrollment.
*/
public class FingerprintEnrollSidecar extends InstrumentedFragment {
private int mEnrollmentSteps = -1;
private int mEnrollmentRemaining = 0;
private Listener mListener;
private boolean mEnrolling;
private CancellationSignal mEnrollmentCancel;
private Handler mHandler = new Handler();
private byte[] mToken;
private boolean mDone;
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setRetainInstance(true);
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
mToken = activity.getIntent().getByteArrayExtra(
ChooseLockSettingsHelper.EXTRA_KEY_CHALLENGE_TOKEN);
}
@Override
public void onStart() {
super.onStart();
if (!mEnrolling) {
startEnrollment();
}
}
@Override
public void onStop() {
super.onStop();
if (!getActivity().isChangingConfigurations()) {
cancelEnrollment();
}
}
private void startEnrollment() {
mHandler.removeCallbacks(mTimeoutRunnable);
mEnrollmentSteps = -1;
mEnrollmentCancel = new CancellationSignal();
getActivity().getSystemService(FingerprintManager.class).enroll(mToken, mEnrollmentCancel,
0 /* flags */, mEnrollmentCallback);
mEnrolling = true;
}
private void cancelEnrollment() {
mHandler.removeCallbacks(mTimeoutRunnable);
if (mEnrolling) {
mEnrollmentCancel.cancel();
mEnrolling = false;
mEnrollmentSteps = -1;
}
}
public void setListener(Listener listener) {
mListener = listener;
}
public int getEnrollmentSteps() {
return mEnrollmentSteps;
}
public int getEnrollmentRemaining() {
return mEnrollmentRemaining;
}
public boolean isDone() {
return mDone;
}
private FingerprintManager.EnrollmentCallback mEnrollmentCallback
= new FingerprintManager.EnrollmentCallback() {
@Override
public void onEnrollmentProgress(int remaining) {
if (mEnrollmentSteps == -1) {
mEnrollmentSteps = remaining;
}
mEnrollmentRemaining = remaining;
mDone = remaining == 0;
if (mListener != null) {
mListener.onEnrollmentProgressChange(mEnrollmentSteps, remaining);
}
}
@Override
public void onEnrollmentHelp(int helpMsgId, CharSequence helpString) {
if (mListener != null) {
mListener.onEnrollmentHelp(helpString);
}
}
@Override
public void onEnrollmentError(int errMsgId, CharSequence errString) {
if (mListener != null) {
mListener.onEnrollmentError(errString);
}
}
};
private final Runnable mTimeoutRunnable = new Runnable() {
@Override
public void run() {
cancelEnrollment();
}
};
@Override
protected int getMetricsCategory() {
return MetricsLogger.FINGERPRINT_ENROLL_SIDECAR;
}
public interface Listener {
void onEnrollmentHelp(CharSequence helpString);
void onEnrollmentError(CharSequence errString);
void onEnrollmentProgressChange(int steps, int remaining);
}
}
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