/*
* Copyright (C) 2008 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;
import com.android.internal.widget.LockPatternUtils;
import com.android.internal.widget.LockPatternView;
import com.android.internal.widget.LinearLayoutWithDefaultTouchRecepient;
import android.app.Activity;
import android.content.Intent;
import android.os.CountDownTimer;
import android.os.SystemClock;
import android.os.Bundle;
import android.widget.TextView;
import android.view.Window;
import java.util.List;
/**
* Launch this when you want the user to confirm their lock pattern.
*
* Sets an activity result of {@link Activity#RESULT_OK} when the user
* successfully confirmed their pattern.
*/
public class ConfirmLockPattern extends Activity {
/**
* Names of {@link CharSequence} fields within the originating {@link Intent}
* that are used to configure the keyguard confirmation view's labeling.
* The view will use the system-defined resource strings for any labels that
* the caller does not supply.
*/
public static final String HEADER_TEXT = "com.android.settings.ConfirmLockPattern.header";
public static final String FOOTER_TEXT = "com.android.settings.ConfirmLockPattern.footer";
public static final String HEADER_WRONG_TEXT = "com.android.settings.ConfirmLockPattern.header_wrong";
public static final String FOOTER_WRONG_TEXT = "com.android.settings.ConfirmLockPattern.footer_wrong";
// how long we wait to clear a wrong pattern
private static final int WRONG_PATTERN_CLEAR_TIMEOUT_MS = 2000;
private static final String KEY_NUM_WRONG_ATTEMPTS = "num_wrong_attempts";
private LockPatternView mLockPatternView;
private LockPatternUtils mLockPatternUtils;
private int mNumWrongConfirmAttempts;
private CountDownTimer mCountdownTimer;
private TextView mHeaderTextView;
private TextView mFooterTextView;
// caller-supplied text for various prompts
private CharSequence mHeaderText;
private CharSequence mFooterText;
private CharSequence mHeaderWrongText;
private CharSequence mFooterWrongText;
private enum Stage {
NeedToUnlock,
NeedToUnlockWrong,
LockedOut
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mLockPatternUtils = new LockPatternUtils(getContentResolver());
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.confirm_lock_pattern);
mHeaderTextView = (TextView) findViewById(R.id.headerText);
mLockPatternView = (LockPatternView) findViewById(R.id.lockPattern);
mFooterTextView = (TextView) findViewById(R.id.footerText);
// make it so unhandled touch events within the unlock screen go to the
// lock pattern view.
final LinearLayoutWithDefaultTouchRecepient topLayout
= (LinearLayoutWithDefaultTouchRecepient) findViewById(
R.id.topLayout);
topLayout.setDefaultTouchRecepient(mLockPatternView);
Intent intent = getIntent();
if (intent != null) {
mHeaderText = intent.getCharSequenceExtra(HEADER_TEXT);
mFooterText = intent.getCharSequenceExtra(FOOTER_TEXT);
mHeaderWrongText = intent.getCharSequenceExtra(HEADER_WRONG_TEXT);
mFooterWrongText = intent.getCharSequenceExtra(FOOTER_WRONG_TEXT);
}
mLockPatternView.setTactileFeedbackEnabled(mLockPatternUtils.isTactileFeedbackEnabled());
mLockPatternView.setOnPatternListener(mConfirmExistingLockPatternListener);
updateStage(Stage.NeedToUnlock);
if (savedInstanceState != null) {
mNumWrongConfirmAttempts = savedInstanceState.getInt(KEY_NUM_WRONG_ATTEMPTS);
} else {
// on first launch, if no lock pattern is set, then finish with
// success (don't want user to get stuck confirming something that
// doesn't exist).
if (!mLockPatternUtils.savedPatternExists()) {
setResult(RESULT_OK);
finish();
}
}
}
@Override
protected void onSaveInstanceState(Bundle outState) {
// deliberately not calling super since we are managing this in full
outState.putInt(KEY_NUM_WRONG_ATTEMPTS, mNumWrongConfirmAttempts);
}
@Override
protected void onPause() {
super.onPause();
if (mCountdownTimer != null) {
mCountdownTimer.cancel();
}
}
@Override
protected void onResume() {
super.onResume();
// if the user is currently locked out, enforce it.
long deadline = mLockPatternUtils.getLockoutAttemptDeadline();
if (deadline != 0) {
handleAttemptLockout(deadline);
}
}
private void updateStage(Stage stage) {
switch (stage) {
case NeedToUnlock:
if (mHeaderText != null) {
mHeaderTextView.setText(mHeaderText);
} else {
mHeaderTextView.setText(R.string.lockpattern_need_to_unlock);
}
if (mFooterText != null) {
mFooterTextView.setText(mFooterText);
} else {
mFooterTextView.setText(R.string.lockpattern_need_to_unlock_footer);
}
mLockPatternView.setEnabled(true);
mLockPatternView.enableInput();
break;
case NeedToUnlockWrong:
if (mHeaderWrongText != null) {
mHeaderTextView.setText(mHeaderWrongText);
} else {
mHeaderTextView.setText(R.string.lockpattern_need_to_unlock_wrong);
}
if (mFooterWrongText != null) {
mFooterTextView.setText(mFooterWrongText);
} else {
mFooterTextView.setText(R.string.lockpattern_need_to_unlock_wrong_footer);
}
mLockPatternView.setDisplayMode(LockPatternView.DisplayMode.Wrong);
mLockPatternView.setEnabled(true);
mLockPatternView.enableInput();
break;
case LockedOut:
mLockPatternView.clearPattern();
// enabled = false means: disable input, and have the
// appearance of being disabled.
mLockPatternView.setEnabled(false); // appearance of being disabled
break;
}
}
private Runnable mClearPatternRunnable = new Runnable() {
public void run() {
mLockPatternView.clearPattern();
}
};
// clear the wrong pattern unless they have started a new one
// already
private void postClearPatternRunnable() {
mLockPatternView.removeCallbacks(mClearPatternRunnable);
mLockPatternView.postDelayed(mClearPatternRunnable, WRONG_PATTERN_CLEAR_TIMEOUT_MS);
}
/**
* The pattern listener that responds according to a user confirming
* an existing lock pattern.
*/
private LockPatternView.OnPatternListener mConfirmExistingLockPatternListener = new LockPatternView.OnPatternListener() {
public void onPatternStart() {
mLockPatternView.removeCallbacks(mClearPatternRunnable);
}
public void onPatternCleared() {
mLockPatternView.removeCallbacks(mClearPatternRunnable);
}
public void onPatternDetected(List<LockPatternView.Cell> pattern) {
if (mLockPatternUtils.checkPattern(pattern)) {
setResult(RESULT_OK);
finish();
} else {
if (pattern.size() >= LockPatternUtils.MIN_PATTERN_REGISTER_FAIL &&
++mNumWrongConfirmAttempts >= LockPatternUtils.FAILED_ATTEMPTS_BEFORE_TIMEOUT) {
long deadline = mLockPatternUtils.setLockoutAttemptDeadline();
handleAttemptLockout(deadline);
} else {
updateStage(Stage.NeedToUnlockWrong);
postClearPatternRunnable();
}
}
}
};
private void handleAttemptLockout(long elapsedRealtimeDeadline) {
updateStage(Stage.LockedOut);
long elapsedRealtime = SystemClock.elapsedRealtime();
mCountdownTimer = new CountDownTimer(
elapsedRealtimeDeadline - elapsedRealtime,
LockPatternUtils.FAILED_ATTEMPT_COUNTDOWN_INTERVAL_MS) {
@Override
public void onTick(long millisUntilFinished) {
mHeaderTextView.setText(R.string.lockpattern_too_many_failed_confirmation_attempts_header);
final int secondsCountdown = (int) (millisUntilFinished / 1000);
mFooterTextView.setText(getString(
R.string.lockpattern_too_many_failed_confirmation_attempts_footer,
secondsCountdown));
}
@Override
public void onFinish() {
mNumWrongConfirmAttempts = 0;
updateStage(Stage.NeedToUnlock);
}
}.start();
}
}
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