Merge changes from topic "biometric-cc"

* changes:
  3/n: Make CDCA transparent and add BiometricPrompt
  2/n: Add comments to launchConfirmationActivity parameters
  1/n: Prepare ConfirmDeviceCredentials to use BiometricPrompt

src/com/android/settings/biometrics/fingerprint/FingerprintUiHelper.java

@@ -1,130 +0,0 @@
-/*
- * 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.biometrics.fingerprint;
-
-import android.hardware.fingerprint.FingerprintManager;
-import android.os.CancellationSignal;
-import android.view.View;
-import android.widget.ImageView;
-import android.widget.TextView;
-
-import com.android.settings.R;
-import com.android.settings.Utils;
-
-/**
- * Small helper class to manage text/icon around fingerprint authentication UI.
- */
-public class FingerprintUiHelper extends FingerprintManager.AuthenticationCallback {
-
-    private static final long ERROR_TIMEOUT = 1300;
-
-    private ImageView mIcon;
-    private TextView mErrorTextView;
-    private CancellationSignal mCancellationSignal;
-    private int mUserId;
-
-    private Callback mCallback;
-    private FingerprintManager mFingerprintManager;
-
-    public FingerprintUiHelper(ImageView icon, TextView errorTextView, Callback callback,
-            int userId) {
-        mFingerprintManager = Utils.getFingerprintManagerOrNull(icon.getContext());
-        mIcon = icon;
-        mErrorTextView = errorTextView;
-        mCallback = callback;
-        mUserId = userId;
-    }
-
-    public void startListening() {
-        if (mFingerprintManager != null && mFingerprintManager.isHardwareDetected()
-                && mFingerprintManager.getEnrolledFingerprints(mUserId).size() > 0) {
-            mCancellationSignal = new CancellationSignal();
-            mFingerprintManager.setActiveUser(mUserId);
-            mFingerprintManager.authenticate(
-                    null, mCancellationSignal, 0 /* flags */, this, null, mUserId);
-            setFingerprintIconVisibility(true);
-            mIcon.setImageResource(R.drawable.ic_fingerprint);
-        }
-    }
-
-    public void stopListening() {
-        if (mCancellationSignal != null) {
-            mCancellationSignal.cancel();
-            mCancellationSignal = null;
-        }
-    }
-
-    public boolean isListening() {
-        return mCancellationSignal != null && !mCancellationSignal.isCanceled();
-    }
-
-    private void setFingerprintIconVisibility(boolean visible) {
-        mIcon.setVisibility(visible ? View.VISIBLE : View.GONE);
-        mCallback.onFingerprintIconVisibilityChanged(visible);
-    }
-
-    @Override
-    public void onAuthenticationError(int errMsgId, CharSequence errString) {
-        if (errMsgId == FingerprintManager.FINGERPRINT_ERROR_CANCELED) {
-            // Only happens if we get preempted by another activity. Ignored.
-            return;
-        }
-        showError(errString);
-        setFingerprintIconVisibility(false);
-    }
-
-    @Override
-    public void onAuthenticationHelp(int helpMsgId, CharSequence helpString) {
-        showError(helpString);
-    }
-
-    @Override
-    public void onAuthenticationFailed() {
-        showError(mIcon.getResources().getString(
-                R.string.fingerprint_not_recognized));
-    }
-
-    @Override
-    public void onAuthenticationSucceeded(FingerprintManager.AuthenticationResult result) {
-        mIcon.setImageResource(R.drawable.ic_fingerprint_success);
-        mCallback.onAuthenticated();
-    }
-
-    private void showError(CharSequence error) {
-        if (!isListening()) {
-            return;
-        }
-
-        mIcon.setImageResource(R.drawable.ic_fingerprint_error);
-        mErrorTextView.setText(error);
-        mErrorTextView.removeCallbacks(mResetErrorTextRunnable);
-        mErrorTextView.postDelayed(mResetErrorTextRunnable, ERROR_TIMEOUT);
-    }
-
-    private Runnable mResetErrorTextRunnable = new Runnable() {
-        @Override
-        public void run() {
-            mErrorTextView.setText("");
-            mIcon.setImageResource(R.drawable.ic_fingerprint);
-        }
-    };
-
-    public interface Callback {
-        void onAuthenticated();
-        void onFingerprintIconVisibilityChanged(boolean visible);
-    }
-}