LockTaskNotify.java revision 7779bf1ce8243d9f856c05db3cc5a37a8227a970 
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.server.am;
18
19import android.content.Context;
20import android.os.Handler;
21import android.os.Message;
22import android.widget.Toast;
23
24import com.android.internal.R;
25
26/**
27 *  Helper to manage showing/hiding a image to notify them that they are entering
28 *  or exiting lock-to-app mode.
29 */
30public class LockTaskNotify {
31    private static final String TAG = "LockTaskNotify";
32
33    private final Context mContext;
34    private final H mHandler;
35
36    public LockTaskNotify(Context context) {
37        mContext = context;
38        mHandler = new H();
39    }
40
41    public void showToast(boolean isLocked) {
42        mHandler.obtainMessage(H.SHOW_TOAST, isLocked ? 1 : 0, 0 /* Not used */).sendToTarget();
43    }
44
45    public void handleShowToast(boolean isLocked) {
46        String text = mContext.getString(isLocked
47                ? R.string.lock_to_app_toast_locked : R.string.lock_to_app_toast);
48        Toast.makeText(mContext, text, Toast.LENGTH_LONG).show();
49    }
50
51    public void show(boolean starting) {
52        int showString = R.string.lock_to_app_exit;
53        if (starting) {
54            showString = R.string.lock_to_app_start;
55        }
56        Toast.makeText(mContext, mContext.getString(showString), Toast.LENGTH_LONG).show();
57    }
58
59    private final class H extends Handler {
60        private static final int SHOW_TOAST = 3;
61
62        @Override
63        public void handleMessage(Message msg) {
64            switch(msg.what) {
65                case SHOW_TOAST:
66                    handleShowToast(msg.arg1 != 0);
67                    break;
68            }
69        }
70    }
71}
72