PasswordUnlockScreen.java revision 305093f9116b364856bcdcd499e9f69910e249dd 
1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.internal.policy.impl;
18
19import android.app.admin.DevicePolicyManager;
20import android.content.Context;
21import android.content.res.Configuration;
22import android.graphics.Rect;
23
24import com.android.internal.policy.impl.PatternUnlockScreen.FooterMode;
25import com.android.internal.widget.LockPatternUtils;
26import com.android.internal.widget.PasswordEntryKeyboardView;
27
28import android.os.CountDownTimer;
29import android.os.SystemClock;
30import android.telephony.TelephonyManager;
31import android.text.method.DigitsKeyListener;
32import android.text.method.TextKeyListener;
33import android.util.Log;
34import android.view.KeyEvent;
35import android.view.LayoutInflater;
36import android.view.View;
37import android.view.inputmethod.EditorInfo;
38import android.widget.Button;
39import android.widget.EditText;
40import android.widget.LinearLayout;
41import android.widget.TextView;
42import android.widget.TextView.OnEditorActionListener;
43
44import com.android.internal.R;
45import com.android.internal.widget.PasswordEntryKeyboardHelper;
46
47/**
48 * Displays a dialer-like interface or alphanumeric (latin-1) key entry for the user to enter
49 * an unlock password
50 */
51public class PasswordUnlockScreen extends LinearLayout implements KeyguardScreen,
52        View.OnClickListener, KeyguardUpdateMonitor.InfoCallback, OnEditorActionListener {
53
54    private static final String TAG = "PasswordUnlockScreen";
55    private final KeyguardUpdateMonitor mUpdateMonitor;
56    private final KeyguardScreenCallback mCallback;
57
58    private boolean mIsAlpha;
59
60    private EditText mPasswordEntry;
61    private Button mEmergencyCallButton;
62    private LockPatternUtils mLockPatternUtils;
63    private PasswordEntryKeyboardView mKeyboardView;
64    private PasswordEntryKeyboardView mKeyboardViewAlpha;
65    private PasswordEntryKeyboardHelper mKeyboardHelper;
66    private PasswordEntryKeyboardHelper mKeyboardHelperAlpha;
67
68    private int mCreationOrientation;
69    private int mCreationHardKeyboardHidden;
70    private CountDownTimer mCountdownTimer;
71
72    private StatusView mStatusView;
73
74    // To avoid accidental lockout due to events while the device in in the pocket, ignore
75    // any passwords with length less than or equal to this length.
76    private static final int MINIMUM_PASSWORD_LENGTH_BEFORE_REPORT = 3;
77
78    public PasswordUnlockScreen(Context context, Configuration configuration,
79            LockPatternUtils lockPatternUtils, KeyguardUpdateMonitor updateMonitor,
80            KeyguardScreenCallback callback) {
81        super(context);
82
83        mCreationHardKeyboardHidden = configuration.hardKeyboardHidden;
84        mCreationOrientation = configuration.orientation;
85        mUpdateMonitor = updateMonitor;
86        mCallback = callback;
87        mLockPatternUtils = lockPatternUtils;
88
89        LayoutInflater layoutInflater = LayoutInflater.from(context);
90        if (mCreationOrientation != Configuration.ORIENTATION_LANDSCAPE) {
91            layoutInflater.inflate(R.layout.keyguard_screen_password_portrait, this, true);
92        } else {
93            layoutInflater.inflate(R.layout.keyguard_screen_password_landscape, this, true);
94        }
95
96        mStatusView = new StatusView(this, mUpdateMonitor, mLockPatternUtils);
97
98        final int quality = lockPatternUtils.getKeyguardStoredPasswordQuality();
99        mIsAlpha = DevicePolicyManager.PASSWORD_QUALITY_ALPHABETIC == quality
100                || DevicePolicyManager.PASSWORD_QUALITY_ALPHANUMERIC == quality
101                || DevicePolicyManager.PASSWORD_QUALITY_COMPLEX == quality;
102
103        mKeyboardView = (PasswordEntryKeyboardView) findViewById(R.id.keyboard);
104        mKeyboardViewAlpha = (PasswordEntryKeyboardView) findViewById(R.id.keyboardAlpha);
105        mPasswordEntry = (EditText) findViewById(R.id.passwordEntry);
106        mPasswordEntry.setOnEditorActionListener(this);
107        mEmergencyCallButton = (Button) findViewById(R.id.emergencyCall);
108        mEmergencyCallButton.setOnClickListener(this);
109        mLockPatternUtils.updateEmergencyCallButtonState(mEmergencyCallButton);
110
111        mKeyboardHelper = new PasswordEntryKeyboardHelper(context, mKeyboardView, this, false);
112        // TODO: re-enable on phones with keyboards
113        boolean isPhysicalKbShowing = false;
114        //mCreationHardKeyboardHidden == Configuration.HARDKEYBOARDHIDDEN_NO;
115        if (mKeyboardViewAlpha == null || !mIsAlpha) {
116            mKeyboardHelper.setKeyboardMode(mIsAlpha ?
117                    PasswordEntryKeyboardHelper.KEYBOARD_MODE_ALPHA
118                    : PasswordEntryKeyboardHelper.KEYBOARD_MODE_NUMERIC);
119            mKeyboardView.setVisibility(isPhysicalKbShowing ? View.INVISIBLE : View.VISIBLE);
120        } else {
121            mKeyboardHelperAlpha = new PasswordEntryKeyboardHelper(context, mKeyboardViewAlpha,
122                    this, false);
123            mKeyboardHelper.setKeyboardMode(PasswordEntryKeyboardHelper.KEYBOARD_MODE_NUMERIC);
124            mKeyboardHelperAlpha.setKeyboardMode(PasswordEntryKeyboardHelper.KEYBOARD_MODE_ALPHA);
125            mKeyboardView.setVisibility(View.GONE);
126            mKeyboardViewAlpha.setVisibility(isPhysicalKbShowing ? View.INVISIBLE : View.VISIBLE);
127            mPasswordEntry.setWidth(mKeyboardViewAlpha.getLayoutParams().width);
128        }
129
130        mPasswordEntry.setCompoundDrawablesWithIntrinsicBounds(R.drawable.ic_lock_idle_lock, 0,
131                0, 0);
132        mPasswordEntry.requestFocus();
133
134        // This allows keyboards with overlapping qwerty/numeric keys to choose just the
135        // numeric keys.
136        if (mIsAlpha) {
137            mPasswordEntry.setKeyListener(TextKeyListener.getInstance());
138            mStatusView.setHelpMessage(R.string.keyguard_password_enter_password_code,
139                    StatusView.LOCK_ICON);
140        } else {
141            mPasswordEntry.setKeyListener(DigitsKeyListener.getInstance());
142            mStatusView.setHelpMessage(R.string.keyguard_password_enter_pin_code,
143                    StatusView.LOCK_ICON);
144        }
145
146        mKeyboardHelper.setVibratePattern(mLockPatternUtils.isTactileFeedbackEnabled() ?
147                com.android.internal.R.array.config_virtualKeyVibePattern : 0);
148        if (mKeyboardHelperAlpha != null) {
149            mKeyboardHelperAlpha.setVibratePattern(mLockPatternUtils.isTactileFeedbackEnabled() ?
150                    com.android.internal.R.array.config_virtualKeyVibePattern : 0);
151        }
152
153        // until we get an update...
154        mStatusView.setCarrierText(LockScreen.getCarrierString(
155                        mUpdateMonitor.getTelephonyPlmn(),
156                        mUpdateMonitor.getTelephonySpn()));
157
158        mUpdateMonitor.registerInfoCallback(this);
159        //mUpdateMonitor.registerSimStateCallback(this);
160
161        resetStatusInfo();
162    }
163
164    @Override
165    protected boolean onRequestFocusInDescendants(int direction, Rect previouslyFocusedRect) {
166        // send focus to the password field
167        return mPasswordEntry.requestFocus(direction, previouslyFocusedRect);
168    }
169
170    /** {@inheritDoc} */
171    public boolean needsInput() {
172        return false;
173    }
174
175    /** {@inheritDoc} */
176    public void onPause() {
177
178    }
179
180    /** {@inheritDoc} */
181    public void onResume() {
182        // reset status
183        mStatusView.resetStatusInfo(mUpdateMonitor, mLockPatternUtils);
184
185        // start fresh
186        mPasswordEntry.setText("");
187        resetStatusInfo();
188        mPasswordEntry.requestFocus();
189        mLockPatternUtils.updateEmergencyCallButtonState(mEmergencyCallButton);
190
191        // if the user is currently locked out, enforce it.
192        long deadline = mLockPatternUtils.getLockoutAttemptDeadline();
193        if (deadline != 0) {
194            handleAttemptLockout(deadline);
195        }
196    }
197
198    /** {@inheritDoc} */
199    public void cleanUp() {
200        mUpdateMonitor.removeCallback(this);
201    }
202
203    public void onClick(View v) {
204        if (v == mEmergencyCallButton) {
205            mCallback.takeEmergencyCallAction();
206        }
207        mCallback.pokeWakelock();
208    }
209
210    private void verifyPasswordAndUnlock() {
211        String entry = mPasswordEntry.getText().toString();
212        if (mLockPatternUtils.checkPassword(entry)) {
213            mCallback.keyguardDone(true);
214            mCallback.reportSuccessfulUnlockAttempt();
215            mStatusView.setInstructionText(null);
216        } else if (entry.length() > MINIMUM_PASSWORD_LENGTH_BEFORE_REPORT ) {
217            // to avoid accidental lockout, only count attempts that are long enough to be a
218            // real password. This may require some tweaking.
219            mCallback.reportFailedUnlockAttempt();
220            if (0 == (mUpdateMonitor.getFailedAttempts()
221                    % LockPatternUtils.FAILED_ATTEMPTS_BEFORE_TIMEOUT)) {
222                long deadline = mLockPatternUtils.setLockoutAttemptDeadline();
223                handleAttemptLockout(deadline);
224            }
225            mStatusView.setInstructionText(R.string.lockscreen_password_wrong);
226        } else if (entry.length() > 0) {
227            mStatusView.setInstructionText(R.string.lockscreen_password_wrong);
228        }
229        mPasswordEntry.setText("");
230    }
231
232    // Prevent user from using the PIN/Password entry until scheduled deadline.
233    private void handleAttemptLockout(long elapsedRealtimeDeadline) {
234        mPasswordEntry.setEnabled(false);
235        mKeyboardView.setEnabled(false);
236        long elapsedRealtime = SystemClock.elapsedRealtime();
237        mCountdownTimer = new CountDownTimer(elapsedRealtimeDeadline - elapsedRealtime, 1000) {
238
239            @Override
240            public void onTick(long millisUntilFinished) {
241                int secondsRemaining = (int) (millisUntilFinished / 1000);
242                String instructions = getContext().getString(
243                        R.string.lockscreen_too_many_failed_attempts_countdown,
244                        secondsRemaining);
245                mStatusView.setInstructionText(instructions);
246            }
247
248            @Override
249            public void onFinish() {
250                mPasswordEntry.setEnabled(true);
251                mKeyboardView.setEnabled(true);
252                resetStatusInfo();
253            }
254        }.start();
255    }
256
257
258    @Override
259    public boolean onKeyDown(int keyCode, KeyEvent event) {
260        mCallback.pokeWakelock();
261        return false;
262    }
263
264    @Override
265    protected void onAttachedToWindow() {
266        super.onAttachedToWindow();
267        Configuration config = getResources().getConfiguration();
268        if (config.orientation != mCreationOrientation
269                || config.hardKeyboardHidden != mCreationHardKeyboardHidden) {
270            mCallback.recreateMe(config);
271        }
272    }
273
274    /** {@inheritDoc} */
275    @Override
276    protected void onConfigurationChanged(Configuration newConfig) {
277        super.onConfigurationChanged(newConfig);
278        if (newConfig.orientation != mCreationOrientation
279                || newConfig.hardKeyboardHidden != mCreationHardKeyboardHidden) {
280            mCallback.recreateMe(newConfig);
281        }
282    }
283
284    public void onKeyboardChange(boolean isKeyboardOpen) {
285        // Don't show the soft keyboard when the real keyboard is open
286        mKeyboardView.setVisibility(isKeyboardOpen ? View.INVISIBLE : View.VISIBLE);
287    }
288
289    public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
290        // Check if this was the result of hitting the enter key
291        if (actionId == EditorInfo.IME_NULL) {
292            verifyPasswordAndUnlock();
293            return true;
294        }
295        return false;
296    }
297
298    // ---------- InfoCallback
299
300    /** {@inheritDoc} */
301    public void onRefreshBatteryInfo(boolean showBatteryInfo, boolean pluggedIn, int batteryLevel) {
302        mStatusView.onRefreshBatteryInfo(showBatteryInfo, pluggedIn, batteryLevel);
303    }
304
305    /** {@inheritDoc} */
306    public void onTimeChanged() {
307        mStatusView.onTimeChanged();
308    }
309
310    /** {@inheritDoc} */
311    public void onRefreshCarrierInfo(CharSequence plmn, CharSequence spn) {
312        mStatusView.onRefreshCarrierInfo(plmn, spn);
313    }
314
315    /** {@inheritDoc} */
316    public void onRingerModeChanged(int state) {
317        // not currently used
318    }
319
320    // ---------- SimStateCallback
321
322    /** {@inheritDoc} */
323    public void onPhoneStateChanged(String newState) {
324        mLockPatternUtils.updateEmergencyCallButtonState(mEmergencyCallButton);
325    }
326
327    private void resetStatusInfo() {
328        mStatusView.setInstructionText(null);
329        mStatusView.updateStatusLines(true);
330    }
331
332}
333