src/com/android/settings/ConfirmLockPattern.java - platform/packages/apps/Settings - Git at Google

 /*
  * 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 com.android.internal.widget.LockPatternView.Cell;

 import android.app.Activity;
 import android.app.Fragment;
 import android.content.Intent;
 import android.os.CountDownTimer;
 import android.os.SystemClock;
 import android.os.Bundle;
 import android.preference.PreferenceActivity;
 import android.widget.TextView;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;

 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 PreferenceActivity {

     /**
      * 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 PACKAGE = "com.android.settings";
     public static final String HEADER_TEXT = PACKAGE + ".ConfirmLockPattern.header";
     public static final String FOOTER_TEXT = PACKAGE + ".ConfirmLockPattern.footer";
     public static final String HEADER_WRONG_TEXT = PACKAGE + ".ConfirmLockPattern.header_wrong";
     public static final String FOOTER_WRONG_TEXT = PACKAGE + ".ConfirmLockPattern.footer_wrong";

     private enum Stage {
         NeedToUnlock,
         NeedToUnlockWrong,
         LockedOut
     }

     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         CharSequence msg = getText(R.string.lockpassword_confirm_your_pattern_header);
         showBreadCrumbs(msg, msg);
     }

     @Override
     public Intent getIntent() {
         Intent modIntent = new Intent(super.getIntent());
         modIntent.putExtra(EXTRA_SHOW_FRAGMENT, ConfirmLockPatternFragment.class.getName());
         modIntent.putExtra(EXTRA_NO_HEADERS, true);
         return modIntent;
     }

     public static class ConfirmLockPatternFragment extends Fragment {

         // 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;

         // required constructor for fragments
         public ConfirmLockPatternFragment() {

         }

         @Override
         public void onCreate(Bundle savedInstanceState) {
             super.onCreate(savedInstanceState);
             mLockPatternUtils = new LockPatternUtils(getActivity());
         }

         @Override
         public View onCreateView(LayoutInflater inflater, ViewGroup container,
                 Bundle savedInstanceState) {
             View view = inflater.inflate(R.layout.confirm_lock_pattern, null);
             mHeaderTextView = (TextView) view.findViewById(R.id.headerText);
             mLockPatternView = (LockPatternView) view.findViewById(R.id.lockPattern);
             mFooterTextView = (TextView) view.findViewById(R.id.footerText);

             // make it so unhandled touch events within the unlock screen go to the
             // lock pattern view.
             final LinearLayoutWithDefaultTouchRecepient topLayout
                     = (LinearLayoutWithDefaultTouchRecepient) view.findViewById(R.id.topLayout);
             topLayout.setDefaultTouchRecepient(mLockPatternView);

             Intent intent = getActivity().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()) {
                     getActivity().setResult(Activity.RESULT_OK);
                     getActivity().finish();
                 }
             }
             return view;
         }

         @Override
         public void onSaveInstanceState(Bundle outState) {
             // deliberately not calling super since we are managing this in full
             outState.putInt(KEY_NUM_WRONG_ATTEMPTS, mNumWrongConfirmAttempts);
         }

         @Override
         public void onPause() {
             super.onPause();

             if (mCountdownTimer != null) {
                 mCountdownTimer.cancel();
             }
         }

         @Override
         public void onResume() {
             super.onResume();

             // if the user is currently locked out, enforce it.
             long deadline = mLockPatternUtils.getLockoutAttemptDeadline();
             if (deadline != 0) {
                 handleAttemptLockout(deadline);
             } else if (!mLockPatternView.isEnabled()) {
                 // The deadline has passed, but the timer was cancelled...
                 // Need to clean up.
                 mNumWrongConfirmAttempts = 0;
                 updateStage(Stage.NeedToUnlock);
             }
         }

         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;
             }

             // Always announce the header for accessibility. This is a no-op
             // when accessibility is disabled.
             mHeaderTextView.announceForAccessibility(mHeaderTextView.getText());
         }

         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 onPatternCellAdded(List<Cell> pattern) {

             }

             public void onPatternDetected(List<LockPatternView.Cell> pattern) {
                 if (mLockPatternUtils.checkPattern(pattern)) {

                     Intent intent = new Intent();
                     intent.putExtra(ChooseLockSettingsHelper.EXTRA_KEY_PASSWORD,
                                     LockPatternUtils.patternToString(pattern));

                     getActivity().setResult(Activity.RESULT_OK, intent);
                     getActivity().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();
         }
     }
 }
	/*
	* 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 com.android.internal.widget.LockPatternView.Cell;

	import android.app.Activity;
	import android.app.Fragment;
	import android.content.Intent;
	import android.os.CountDownTimer;
	import android.os.SystemClock;
	import android.os.Bundle;
	import android.preference.PreferenceActivity;
	import android.widget.TextView;
	import android.view.LayoutInflater;
	import android.view.View;
	import android.view.ViewGroup;

	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 PreferenceActivity {

	/**
	* 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 PACKAGE = "com.android.settings";
	public static final String HEADER_TEXT = PACKAGE + ".ConfirmLockPattern.header";
	public static final String FOOTER_TEXT = PACKAGE + ".ConfirmLockPattern.footer";
	public static final String HEADER_WRONG_TEXT = PACKAGE + ".ConfirmLockPattern.header_wrong";
	public static final String FOOTER_WRONG_TEXT = PACKAGE + ".ConfirmLockPattern.footer_wrong";

	private enum Stage {
	NeedToUnlock,
	NeedToUnlockWrong,
	LockedOut
	}

	@Override
	public void onCreate(Bundle savedInstanceState) {
	super.onCreate(savedInstanceState);
	CharSequence msg = getText(R.string.lockpassword_confirm_your_pattern_header);
	showBreadCrumbs(msg, msg);
	}

	@Override
	public Intent getIntent() {
	Intent modIntent = new Intent(super.getIntent());
	modIntent.putExtra(EXTRA_SHOW_FRAGMENT, ConfirmLockPatternFragment.class.getName());
	modIntent.putExtra(EXTRA_NO_HEADERS, true);
	return modIntent;
	}

	public static class ConfirmLockPatternFragment extends Fragment {

	// 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;

	// required constructor for fragments
	public ConfirmLockPatternFragment() {

	}

	@Override
	public void onCreate(Bundle savedInstanceState) {
	super.onCreate(savedInstanceState);
	mLockPatternUtils = new LockPatternUtils(getActivity());
	}

	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
	Bundle savedInstanceState) {
	View view = inflater.inflate(R.layout.confirm_lock_pattern, null);
	mHeaderTextView = (TextView) view.findViewById(R.id.headerText);
	mLockPatternView = (LockPatternView) view.findViewById(R.id.lockPattern);
	mFooterTextView = (TextView) view.findViewById(R.id.footerText);

	// make it so unhandled touch events within the unlock screen go to the
	// lock pattern view.
	final LinearLayoutWithDefaultTouchRecepient topLayout
	= (LinearLayoutWithDefaultTouchRecepient) view.findViewById(R.id.topLayout);
	topLayout.setDefaultTouchRecepient(mLockPatternView);

	Intent intent = getActivity().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()) {
	getActivity().setResult(Activity.RESULT_OK);
	getActivity().finish();
	}
	}
	return view;
	}

	@Override
	public void onSaveInstanceState(Bundle outState) {
	// deliberately not calling super since we are managing this in full
	outState.putInt(KEY_NUM_WRONG_ATTEMPTS, mNumWrongConfirmAttempts);
	}

	@Override
	public void onPause() {
	super.onPause();

	if (mCountdownTimer != null) {
	mCountdownTimer.cancel();
	}
	}

	@Override
	public void onResume() {
	super.onResume();

	// if the user is currently locked out, enforce it.
	long deadline = mLockPatternUtils.getLockoutAttemptDeadline();
	if (deadline != 0) {
	handleAttemptLockout(deadline);
	} else if (!mLockPatternView.isEnabled()) {
	// The deadline has passed, but the timer was cancelled...
	// Need to clean up.
	mNumWrongConfirmAttempts = 0;
	updateStage(Stage.NeedToUnlock);
	}
	}

	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;
	}

	// Always announce the header for accessibility. This is a no-op
	// when accessibility is disabled.
	mHeaderTextView.announceForAccessibility(mHeaderTextView.getText());
	}

	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 onPatternCellAdded(List<Cell> pattern) {

	}

	public void onPatternDetected(List<LockPatternView.Cell> pattern) {
	if (mLockPatternUtils.checkPattern(pattern)) {

	Intent intent = new Intent();
	intent.putExtra(ChooseLockSettingsHelper.EXTRA_KEY_PASSWORD,
	LockPatternUtils.patternToString(pattern));

	getActivity().setResult(Activity.RESULT_OK, intent);
	getActivity().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();
	}
	}
	}