/*
* Copyright (C) 2007 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.google.android.collect.Lists;
import com.android.internal.widget.LinearLayoutWithDefaultTouchRecepient;
import com.android.internal.widget.LockPatternUtils;
import com.android.internal.widget.LockPatternView;
import static com.android.internal.widget.LockPatternView.DisplayMode;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.View;
import android.view.Window;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
/**
* If the user has a lock pattern set already, makes them confirm the existing one.
*
* Then, prompts the user to choose a lock pattern:
* - prompts for initial pattern
* - asks for confirmation / restart
* - saves chosen password when confirmed
*/
public class ChooseLockPattern extends Activity implements View.OnClickListener{
/**
* Used by the choose lock pattern wizard to indicate the wizard is
* finished, and each activity in the wizard should finish.
* <p>
* Previously, each activity in the wizard would finish itself after
* starting the next activity. However, this leads to broken 'Back'
* behavior. So, now an activity does not finish itself until it gets this
* result.
*/
static final int RESULT_FINISHED = RESULT_FIRST_USER;
// how long after a confirmation message is shown before moving on
static final int INFORMATION_MSG_TIMEOUT_MS = 3000;
// how long we wait to clear a wrong pattern
private static final int WRONG_PATTERN_CLEAR_TIMEOUT_MS = 2000;
private static final int ID_EMPTY_MESSAGE = -1;
protected TextView mHeaderText;
protected LockPatternView mLockPatternView;
protected TextView mFooterText;
private TextView mFooterLeftButton;
private TextView mFooterRightButton;
protected List<LockPatternView.Cell> mChosenPattern = null;
protected LockPatternUtils mLockPatternUtils;
/**
* The patten used during the help screen to show how to draw a pattern.
*/
private final List<LockPatternView.Cell> mAnimatePattern =
Collections.unmodifiableList(
Lists.newArrayList(
LockPatternView.Cell.of(0, 0),
LockPatternView.Cell.of(0, 1),
LockPatternView.Cell.of(1, 1),
LockPatternView.Cell.of(2, 1)
));
/**
* The pattern listener that responds according to a user choosing a new
* lock pattern.
*/
protected LockPatternView.OnPatternListener mChooseNewLockPatternListener = new LockPatternView.OnPatternListener() {
public void onPatternStart() {
mLockPatternView.removeCallbacks(mClearPatternRunnable);
patternInProgress();
}
public void onPatternCleared() {
mLockPatternView.removeCallbacks(mClearPatternRunnable);
}
public void onPatternDetected(List<LockPatternView.Cell> pattern) {
if (mUiStage == Stage.NeedToConfirm || mUiStage == Stage.ConfirmWrong) {
if (mChosenPattern == null) throw new IllegalStateException("null chosen pattern in stage 'need to confirm");
if (mChosenPattern.equals(pattern)) {
updateStage(Stage.ChoiceConfirmed);
} else {
updateStage(Stage.ConfirmWrong);
}
} else if (mUiStage == Stage.Introduction || mUiStage == Stage.ChoiceTooShort){
if (pattern.size() < LockPatternUtils.MIN_LOCK_PATTERN_SIZE) {
updateStage(Stage.ChoiceTooShort);
} else {
mChosenPattern = new ArrayList<LockPatternView.Cell>(pattern);
updateStage(Stage.FirstChoiceValid);
}
} else {
throw new IllegalStateException("Unexpected stage " + mUiStage + " when "
+ "entering the pattern.");
}
}
private void patternInProgress() {
mHeaderText.setText(R.string.lockpattern_recording_inprogress);
mFooterText.setText("");
mFooterLeftButton.setEnabled(false);
mFooterRightButton.setEnabled(false);
}
};
/**
* The states of the left footer button.
*/
enum LeftButtonMode {
Cancel(R.string.cancel, true),
CancelDisabled(R.string.cancel, false),
Retry(R.string.lockpattern_retry_button_text, true),
RetryDisabled(R.string.lockpattern_retry_button_text, false),
Gone(ID_EMPTY_MESSAGE, false);
/**
* @param text The displayed text for this mode.
* @param enabled Whether the button should be enabled.
*/
LeftButtonMode(int text, boolean enabled) {
this.text = text;
this.enabled = enabled;
}
final int text;
final boolean enabled;
}
/**
* The states of the right button.
*/
enum RightButtonMode {
Continue(R.string.lockpattern_continue_button_text, true),
ContinueDisabled(R.string.lockpattern_continue_button_text, false),
Confirm(R.string.lockpattern_confirm_button_text, true),
ConfirmDisabled(R.string.lockpattern_confirm_button_text, false),
Ok(android.R.string.ok, true);
/**
* @param text The displayed text for this mode.
* @param enabled Whether the button should be enabled.
*/
RightButtonMode(int text, boolean enabled) {
this.text = text;
this.enabled = enabled;
}
final int text;
final boolean enabled;
}
/**
* Keep track internally of where the user is in choosing a pattern.
*/
protected enum Stage {
Introduction(
R.string.lockpattern_recording_intro_header,
LeftButtonMode.Cancel, RightButtonMode.ContinueDisabled,
R.string.lockpattern_recording_intro_footer, true),
HelpScreen(
R.string.lockpattern_settings_help_how_to_record,
LeftButtonMode.Gone, RightButtonMode.Ok, ID_EMPTY_MESSAGE, false),
ChoiceTooShort(
R.string.lockpattern_recording_incorrect_too_short,
LeftButtonMode.Retry, RightButtonMode.ContinueDisabled,
ID_EMPTY_MESSAGE, true),
FirstChoiceValid(
R.string.lockpattern_pattern_entered_header,
LeftButtonMode.Retry, RightButtonMode.Continue, ID_EMPTY_MESSAGE, false),
NeedToConfirm(
R.string.lockpattern_need_to_confirm,
LeftButtonMode.CancelDisabled, RightButtonMode.ConfirmDisabled,
ID_EMPTY_MESSAGE, true),
ConfirmWrong(
R.string.lockpattern_need_to_unlock_wrong,
LeftButtonMode.Cancel, RightButtonMode.ConfirmDisabled,
ID_EMPTY_MESSAGE, true),
ChoiceConfirmed(
R.string.lockpattern_pattern_confirmed_header,
LeftButtonMode.Cancel, RightButtonMode.Confirm, ID_EMPTY_MESSAGE, false);
/**
* @param headerMessage The message displayed at the top.
* @param leftMode The mode of the left button.
* @param rightMode The mode of the right button.
* @param footerMessage The footer message.
* @param patternEnabled Whether the pattern widget is enabled.
*/
Stage(int headerMessage,
LeftButtonMode leftMode,
RightButtonMode rightMode,
int footerMessage, boolean patternEnabled) {
this.headerMessage = headerMessage;
this.leftMode = leftMode;
this.rightMode = rightMode;
this.footerMessage = footerMessage;
this.patternEnabled = patternEnabled;
}
final int headerMessage;
final LeftButtonMode leftMode;
final RightButtonMode rightMode;
final int footerMessage;
final boolean patternEnabled;
}
private Stage mUiStage = Stage.Introduction;
private Runnable mClearPatternRunnable = new Runnable() {
public void run() {
mLockPatternView.clearPattern();
}
};
private static final String KEY_UI_STAGE = "uiStage";
private static final String KEY_PATTERN_CHOICE = "chosenPattern";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mLockPatternUtils = new LockPatternUtils(getContentResolver());
requestWindowFeature(Window.FEATURE_NO_TITLE);
setupViews();
// 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);
if (savedInstanceState == null) {
// first launch
updateStage(Stage.Introduction);
if (mLockPatternUtils.savedPatternExists()) {
confirmPattern();
}
} else {
// restore from previous state
final String patternString = savedInstanceState.getString(KEY_PATTERN_CHOICE);
if (patternString != null) {
mChosenPattern = LockPatternUtils.stringToPattern(patternString);
}
updateStage(Stage.values()[savedInstanceState.getInt(KEY_UI_STAGE)]);
}
}
/**
* Keep all "find view" related stuff confined to this function since in
* case someone needs to subclass and customize.
*/
protected void setupViews() {
setContentView(R.layout.choose_lock_pattern);
mHeaderText = (TextView) findViewById(R.id.headerText);
mLockPatternView = (LockPatternView) findViewById(R.id.lockPattern);
mLockPatternView.setOnPatternListener(mChooseNewLockPatternListener);
mLockPatternView.setTactileFeedbackEnabled(mLockPatternUtils.isTactileFeedbackEnabled());
mFooterText = (TextView) findViewById(R.id.footerText);
mFooterLeftButton = (TextView) findViewById(R.id.footerLeftButton);
mFooterRightButton = (TextView) findViewById(R.id.footerRightButton);
mFooterLeftButton.setOnClickListener(this);
mFooterRightButton.setOnClickListener(this);
}
public void onClick(View v) {
if (v == mFooterLeftButton) {
if (mUiStage.leftMode == LeftButtonMode.Retry) {
mChosenPattern = null;
mLockPatternView.clearPattern();
updateStage(Stage.Introduction);
} else if (mUiStage.leftMode == LeftButtonMode.Cancel) {
// They are canceling the entire wizard
setResult(RESULT_FINISHED);
finish();
} else {
throw new IllegalStateException("left footer button pressed, but stage of " +
mUiStage + " doesn't make sense");
}
} else if (v == mFooterRightButton) {
if (mUiStage.rightMode == RightButtonMode.Continue) {
if (mUiStage != Stage.FirstChoiceValid) {
throw new IllegalStateException("expected ui stage " + Stage.FirstChoiceValid
+ " when button is " + RightButtonMode.Continue);
}
updateStage(Stage.NeedToConfirm);
} else if (mUiStage.rightMode == RightButtonMode.Confirm) {
if (mUiStage != Stage.ChoiceConfirmed) {
throw new IllegalStateException("expected ui stage " + Stage.ChoiceConfirmed
+ " when button is " + RightButtonMode.Confirm);
}
saveChosenPatternAndFinish();
} else if (mUiStage.rightMode == RightButtonMode.Ok) {
if (mUiStage != Stage.HelpScreen) {
throw new IllegalStateException("Help screen is only mode with ok button, but " +
"stage is " + mUiStage);
}
mLockPatternView.clearPattern();
mLockPatternView.setDisplayMode(DisplayMode.Correct);
updateStage(Stage.Introduction);
}
}
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0) {
if (mUiStage == Stage.HelpScreen) {
updateStage(Stage.Introduction);
return true;
}
}
if (keyCode == KeyEvent.KEYCODE_MENU && mUiStage == Stage.Introduction) {
updateStage(Stage.HelpScreen);
return true;
}
return super.onKeyDown(keyCode, event);
}
/**
* Launch screen to confirm the existing lock pattern.
* @see #onActivityResult(int, int, android.content.Intent)
*/
protected void confirmPattern() {
final Intent intent = new Intent();
intent.setClassName("com.android.settings", "com.android.settings.ConfirmLockPattern");
startActivityForResult(intent, 55);
}
/**
* @see #confirmPattern
*/
@Override
protected void onActivityResult(int requestCode, int resultCode,
Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode != 55) {
return;
}
if (resultCode != Activity.RESULT_OK) {
setResult(RESULT_FINISHED);
finish();
}
updateStage(Stage.Introduction);
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putInt(KEY_UI_STAGE, mUiStage.ordinal());
if (mChosenPattern != null) {
outState.putString(KEY_PATTERN_CHOICE, LockPatternUtils.patternToString(mChosenPattern));
}
}
/**
* Updates the messages and buttons appropriate to what stage the user
* is at in choosing a view. This doesn't handle clearing out the pattern;
* the pattern is expected to be in the right state.
* @param stage
*/
protected void updateStage(Stage stage) {
mUiStage = stage;
// header text, footer text, visibility and
// enabled state all known from the stage
if (stage == Stage.ChoiceTooShort) {
mHeaderText.setText(
getResources().getString(
stage.headerMessage,
LockPatternUtils.MIN_LOCK_PATTERN_SIZE));
} else {
mHeaderText.setText(stage.headerMessage);
}
if (stage.footerMessage == ID_EMPTY_MESSAGE) {
mFooterText.setText("");
} else {
mFooterText.setText(stage.footerMessage);
}
if (stage.leftMode == LeftButtonMode.Gone) {
mFooterLeftButton.setVisibility(View.GONE);
} else {
mFooterLeftButton.setVisibility(View.VISIBLE);
mFooterLeftButton.setText(stage.leftMode.text);
mFooterLeftButton.setEnabled(stage.leftMode.enabled);
}
mFooterRightButton.setText(stage.rightMode.text);
mFooterRightButton.setEnabled(stage.rightMode.enabled);
// same for whether the patten is enabled
if (stage.patternEnabled) {
mLockPatternView.enableInput();
} else {
mLockPatternView.disableInput();
}
// the rest of the stuff varies enough that it is easier just to handle
// on a case by case basis.
mLockPatternView.setDisplayMode(DisplayMode.Correct);
switch (mUiStage) {
case Introduction:
mLockPatternView.clearPattern();
break;
case HelpScreen:
mLockPatternView.setPattern(DisplayMode.Animate, mAnimatePattern);
break;
case ChoiceTooShort:
mLockPatternView.setDisplayMode(DisplayMode.Wrong);
postClearPatternRunnable();
break;
case FirstChoiceValid:
break;
case NeedToConfirm:
mLockPatternView.clearPattern();
break;
case ConfirmWrong:
mLockPatternView.setDisplayMode(DisplayMode.Wrong);
postClearPatternRunnable();
break;
case ChoiceConfirmed:
break;
}
}
// 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);
}
private void saveChosenPatternAndFinish() {
final boolean lockVirgin = !mLockPatternUtils.isPatternEverChosen();
mLockPatternUtils.saveLockPattern(mChosenPattern);
mLockPatternUtils.setLockPatternEnabled(true);
if (lockVirgin) {
mLockPatternUtils.setVisiblePatternEnabled(true);
mLockPatternUtils.setTactileFeedbackEnabled(false);
}
setResult(RESULT_FINISHED);
finish();
}
}
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