RestrictionsPinActivity.java revision 1a7472e7220a2b027464fb4a2281550f784a2ca3 
1/*
2 * Copyright (C) 2013 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.app;
18
19import android.app.AlertDialog;
20import android.content.Context;
21import android.content.DialogInterface;
22import android.os.Bundle;
23import android.os.UserManager;
24import android.text.Editable;
25import android.text.TextWatcher;
26import android.view.KeyEvent;
27import android.view.LayoutInflater;
28import android.view.View;
29import android.view.WindowManager;
30import android.widget.EditText;
31import android.widget.TextView;
32import android.widget.TextView.OnEditorActionListener;
33
34import com.android.internal.R;
35
36/**
37 * This activity is launched by Settings and other apps to either create a new PIN or
38 * challenge for an existing PIN. The PIN is maintained by UserManager.
39 */
40public class RestrictionsPinActivity extends AlertActivity
41        implements DialogInterface.OnClickListener, TextWatcher, OnEditorActionListener {
42
43    protected UserManager mUserManager;
44    protected boolean mHasRestrictionsPin;
45
46    protected EditText mPinText;
47    protected TextView mPinErrorMessage;
48    protected TextView mPinMessage;
49
50    @Override
51    public void onCreate(Bundle icicle) {
52        super.onCreate(icicle);
53
54        mUserManager = (UserManager) getSystemService(Context.USER_SERVICE);
55        mHasRestrictionsPin = mUserManager.hasRestrictionsPin();
56        initUi();
57        setupAlert();
58    }
59
60    protected void initUi() {
61        AlertController.AlertParams ap = mAlertParams;
62        ap.mTitle = getString(R.string.restr_pin_enter_pin);
63        ap.mPositiveButtonText = getString(R.string.ok);
64        ap.mNegativeButtonText = getString(R.string.cancel);
65        ap.mPositiveButtonListener = this;
66        ap.mNegativeButtonListener = this;
67        LayoutInflater inflater =
68                (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
69        ap.mView = inflater.inflate(R.layout.restrictions_pin_challenge, null);
70
71        mPinMessage = (TextView) ap.mView.findViewById(R.id.pin_message);
72        mPinText = (EditText) ap.mView.findViewById(R.id.pin_text);
73        mPinErrorMessage = (TextView) ap.mView.findViewById(R.id.pin_error_message);
74        mPinText.addTextChangedListener(this);
75    }
76
77    protected boolean verifyingPin() {
78        return true;
79    }
80
81    public void onResume() {
82        super.onResume();
83
84        setPositiveButtonState(false);
85        boolean hasPin = mUserManager.hasRestrictionsPin();
86        if (hasPin) {
87            mPinMessage.setVisibility(View.GONE);
88            mPinErrorMessage.setVisibility(View.GONE);
89            mPinText.setOnEditorActionListener(this);
90            updatePinTimer(-1);
91        } else if (verifyingPin()) {
92            setResult(RESULT_OK);
93            finish();
94        }
95    }
96
97    private void setPositiveButtonState(boolean enabled) {
98        mAlert.getButton(DialogInterface.BUTTON_POSITIVE).setEnabled(enabled);
99    }
100
101    private void updatePinTimer(int pinTimerMs) {
102        if (pinTimerMs < 0) {
103            pinTimerMs = mUserManager.checkRestrictionsPin(null);
104        }
105        if (pinTimerMs >= 200) {
106            final int seconds = (pinTimerMs + 200) / 1000;
107            final String formatString = getResources().getQuantityString(
108                    R.plurals.restr_pin_countdown,
109                    seconds);
110            mPinErrorMessage.setText(String.format(formatString, seconds));
111            mPinErrorMessage.setVisibility(View.VISIBLE);
112            mPinText.setEnabled(false);
113            mPinText.setText("");
114            setPositiveButtonState(false);
115            mPinText.postDelayed(mCountdownRunnable, Math.min(1000, pinTimerMs));
116        } else {
117            mPinErrorMessage.setVisibility(View.INVISIBLE);
118            mPinText.setEnabled(true);
119            mPinText.setText("");
120        }
121    }
122
123    public void onClick(DialogInterface dialog, int which) {
124        setResult(RESULT_CANCELED);
125        if (which == AlertDialog.BUTTON_POSITIVE) {
126            performPositiveButtonAction();
127        } else if (which == AlertDialog.BUTTON_NEGATIVE) {
128            finish();
129        }
130    }
131
132    protected void performPositiveButtonAction() {
133        int result = mUserManager.checkRestrictionsPin(mPinText.getText().toString());
134        if (result == UserManager.PIN_VERIFICATION_SUCCESS) {
135            setResult(RESULT_OK);
136            finish();
137        } else if (result >= 0) {
138            updatePinTimer(result);
139        }
140    }
141
142    @Override
143    public void beforeTextChanged(CharSequence s, int start, int count, int after) {
144    }
145
146    @Override
147    public void onTextChanged(CharSequence s, int start, int before, int count) {
148        CharSequence pin = mPinText.getText();
149        setPositiveButtonState(pin != null && pin.length() >= 4);
150    }
151
152    @Override
153    public void afterTextChanged(Editable s) {
154    }
155
156    @Override
157    public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
158        performPositiveButtonAction();
159        return true;
160    }
161
162    private Runnable mCountdownRunnable = new Runnable() {
163        public void run() {
164            updatePinTimer(-1);
165        }
166    };
167}
168