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.view.accessibility.AccessibilityManager; 23import android.widget.Toast; 24 25import com.android.internal.R; 26 27/** 28 * Helper to manage showing/hiding a image to notify them that they are entering 29 * or exiting lock-to-app mode. 30 */ 31public class LockTaskNotify { 32 private static final String TAG = "LockTaskNotify"; 33 34 private final Context mContext; 35 private final H mHandler; 36 private AccessibilityManager mAccessibilityManager; 37 private Toast mLastToast; 38 39 public LockTaskNotify(Context context) { 40 mContext = context; 41 mAccessibilityManager = (AccessibilityManager) 42 mContext.getSystemService(Context.ACCESSIBILITY_SERVICE); 43 mHandler = new H(); 44 } 45 46 public void showToast(boolean isLocked) { 47 mHandler.obtainMessage(H.SHOW_TOAST, isLocked ? 1 : 0, 0 /* Not used */).sendToTarget(); 48 } 49 50 public void handleShowToast(boolean isLocked) { 51 String text = mContext.getString(isLocked 52 ? R.string.lock_to_app_toast_locked : R.string.lock_to_app_toast); 53 if (!isLocked && mAccessibilityManager.isEnabled()) { 54 text = mContext.getString(R.string.lock_to_app_toast_accessible); 55 } 56 if (mLastToast != null) { 57 mLastToast.cancel(); 58 } 59 mLastToast = Toast.makeText(mContext, text, Toast.LENGTH_LONG); 60 mLastToast.show(); 61 } 62 63 public void show(boolean starting) { 64 int showString = R.string.lock_to_app_exit; 65 if (starting) { 66 showString = R.string.lock_to_app_start; 67 } 68 Toast.makeText(mContext, mContext.getString(showString), Toast.LENGTH_LONG).show(); 69 } 70 71 private final class H extends Handler { 72 private static final int SHOW_TOAST = 3; 73 74 @Override 75 public void handleMessage(Message msg) { 76 switch(msg.what) { 77 case SHOW_TOAST: 78 handleShowToast(msg.arg1 != 0); 79 break; 80 } 81 } 82 } 83} 84