/*
* Copyright (C) 2012 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.keyguard;
import android.accounts.Account;
import android.accounts.AccountManager;
import android.accounts.AccountManagerCallback;
import android.accounts.AccountManagerFuture;
import android.accounts.AuthenticatorException;
import android.accounts.OperationCanceledException;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.graphics.Rect;
import android.os.Bundle;
import android.os.UserHandle;
import android.text.Editable;
import android.text.InputFilter;
import android.text.LoginFilter;
import android.text.TextWatcher;
import android.util.AttributeSet;
import android.view.KeyEvent;
import android.view.View;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import com.android.internal.widget.LockPatternUtils;
import java.io.IOException;
/**
* When the user forgets their password a bunch of times, we fall back on their
* account's login/password to unlock the phone (and reset their lock pattern).
*/
public class KeyguardAccountView extends LinearLayout implements KeyguardSecurityView,
View.OnClickListener, TextWatcher {
private static final String LOCK_PATTERN_PACKAGE = "com.android.settings";
private static final String LOCK_PATTERN_CLASS = LOCK_PATTERN_PACKAGE + ".ChooseLockGeneric";
private KeyguardSecurityCallback mCallback;
private LockPatternUtils mLockPatternUtils;
private EditText mLogin;
private EditText mPassword;
private Button mOk;
public boolean mEnableFallback;
private SecurityMessageDisplay mSecurityMessageDisplay;
/**
* Shown while making asynchronous check of password.
*/
private ProgressDialog mCheckingDialog;
public KeyguardAccountView(Context context) {
this(context, null, 0);
}
public KeyguardAccountView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public KeyguardAccountView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
mLockPatternUtils = new LockPatternUtils(getContext());
}
@Override
protected void onFinishInflate() {
super.onFinishInflate();
mLogin = (EditText) findViewById(R.id.login);
mLogin.setFilters(new InputFilter[] { new LoginFilter.UsernameFilterGeneric() } );
mLogin.addTextChangedListener(this);
mPassword = (EditText) findViewById(R.id.password);
mPassword.addTextChangedListener(this);
mOk = (Button) findViewById(R.id.ok);
mOk.setOnClickListener(this);
mSecurityMessageDisplay = new KeyguardMessageArea.Helper(this);
reset();
}
public void setKeyguardCallback(KeyguardSecurityCallback callback) {
mCallback = callback;
}
public void setLockPatternUtils(LockPatternUtils utils) {
mLockPatternUtils = utils;
}
public KeyguardSecurityCallback getCallback() {
return mCallback;
}
public void afterTextChanged(Editable s) {
}
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
public void onTextChanged(CharSequence s, int start, int before, int count) {
if (mCallback != null) {
mCallback.userActivity();
}
}
@Override
protected boolean onRequestFocusInDescendants(int direction,
Rect previouslyFocusedRect) {
// send focus to the login field
return mLogin.requestFocus(direction, previouslyFocusedRect);
}
public boolean needsInput() {
return true;
}
public void reset() {
// start fresh
mLogin.setText("");
mPassword.setText("");
mLogin.requestFocus();
boolean permLocked = mLockPatternUtils.isPermanentlyLocked();
mSecurityMessageDisplay.setMessage(permLocked ? R.string.kg_login_too_many_attempts :
R.string.kg_login_instructions, permLocked ? true : false);
}
/** {@inheritDoc} */
public void cleanUp() {
if (mCheckingDialog != null) {
mCheckingDialog.hide();
}
mCallback = null;
mLockPatternUtils = null;
}
public void onClick(View v) {
mCallback.userActivity();
if (v == mOk) {
asyncCheckPassword();
}
}
private void postOnCheckPasswordResult(final boolean success) {
// ensure this runs on UI thread
mLogin.post(new Runnable() {
public void run() {
if (success) {
// clear out forgotten password
mLockPatternUtils.setPermanentlyLocked(false);
mLockPatternUtils.setLockPatternEnabled(false);
mLockPatternUtils.saveLockPattern(null);
// launch the 'choose lock pattern' activity so
// the user can pick a new one if they want to
Intent intent = new Intent();
intent.setClassName(LOCK_PATTERN_PACKAGE, LOCK_PATTERN_CLASS);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
mContext.startActivityAsUser(intent,
new UserHandle(mLockPatternUtils.getCurrentUser()));
mCallback.reportUnlockAttempt(true);
// dismiss keyguard
mCallback.dismiss(true);
} else {
mSecurityMessageDisplay.setMessage(R.string.kg_login_invalid_input, true);
mPassword.setText("");
mCallback.reportUnlockAttempt(false);
}
}
});
}
@Override
public boolean dispatchKeyEvent(KeyEvent event) {
if (event.getAction() == KeyEvent.ACTION_DOWN
&& event.getKeyCode() == KeyEvent.KEYCODE_BACK) {
if (mLockPatternUtils.isPermanentlyLocked()) {
mCallback.dismiss(false);
} else {
// TODO: mCallback.forgotPattern(false);
}
return true;
}
return super.dispatchKeyEvent(event);
}
/**
* Given the string the user entered in the 'username' field, find
* the stored account that they probably intended. Prefer, in order:
*
* - an exact match for what was typed, or
* - a case-insensitive match for what was typed, or
* - if they didn't include a domain, an exact match of the username, or
* - if they didn't include a domain, a case-insensitive
* match of the username.
*
* If there is a tie for the best match, choose neither --
* the user needs to be more specific.
*
* @return an account name from the database, or null if we can't
* find a single best match.
*/
private Account findIntendedAccount(String username) {
Account[] accounts = AccountManager.get(mContext).getAccountsByTypeAsUser("com.google",
new UserHandle(mLockPatternUtils.getCurrentUser()));
// Try to figure out which account they meant if they
// typed only the username (and not the domain), or got
// the case wrong.
Account bestAccount = null;
int bestScore = 0;
for (Account a: accounts) {
int score = 0;
if (username.equals(a.name)) {
score = 4;
} else if (username.equalsIgnoreCase(a.name)) {
score = 3;
} else if (username.indexOf('@') < 0) {
int i = a.name.indexOf('@');
if (i >= 0) {
String aUsername = a.name.substring(0, i);
if (username.equals(aUsername)) {
score = 2;
} else if (username.equalsIgnoreCase(aUsername)) {
score = 1;
}
}
}
if (score > bestScore) {
bestAccount = a;
bestScore = score;
} else if (score == bestScore) {
bestAccount = null;
}
}
return bestAccount;
}
private void asyncCheckPassword() {
mCallback.userActivity();
final String login = mLogin.getText().toString();
final String password = mPassword.getText().toString();
Account account = findIntendedAccount(login);
if (account == null) {
postOnCheckPasswordResult(false);
return;
}
getProgressDialog().show();
Bundle options = new Bundle();
options.putString(AccountManager.KEY_PASSWORD, password);
AccountManager.get(mContext).confirmCredentialsAsUser(account, options, null /* activity */,
new AccountManagerCallback<Bundle>() {
public void run(AccountManagerFuture<Bundle> future) {
try {
mCallback.userActivity();
final Bundle result = future.getResult();
final boolean verified = result.getBoolean(AccountManager.KEY_BOOLEAN_RESULT);
postOnCheckPasswordResult(verified);
} catch (OperationCanceledException e) {
postOnCheckPasswordResult(false);
} catch (IOException e) {
postOnCheckPasswordResult(false);
} catch (AuthenticatorException e) {
postOnCheckPasswordResult(false);
} finally {
mLogin.post(new Runnable() {
public void run() {
getProgressDialog().hide();
}
});
}
}
}, null /* handler */, new UserHandle(mLockPatternUtils.getCurrentUser()));
}
private Dialog getProgressDialog() {
if (mCheckingDialog == null) {
mCheckingDialog = new ProgressDialog(mContext);
mCheckingDialog.setMessage(
mContext.getString(R.string.kg_login_checking_password));
mCheckingDialog.setIndeterminate(true);
mCheckingDialog.setCancelable(false);
mCheckingDialog.getWindow().setType(
WindowManager.LayoutParams.TYPE_KEYGUARD_DIALOG);
}
return mCheckingDialog;
}
@Override
public void onPause() {
}
@Override
public void onResume(int reason) {
reset();
}
@Override
public void showUsabilityHint() {
}
@Override
public void showBouncer(int duration) {
}
@Override
public void hideBouncer(int duration) {
}
@Override
public void startAppearAnimation() {
// TODO.
}
@Override
public boolean startDisappearAnimation(Runnable finishRunnable) {
return false;
}
}
|
