1/*
2 * Copyright (C) 2012 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.camera.ui;
18
19import java.util.Locale;
20
21import android.content.Context;
22import android.media.AudioManager;
23import android.media.SoundPool;
24import android.os.Handler;
25import android.os.Message;
26import android.util.AttributeSet;
27import android.util.Log;
28import android.view.View;
29import android.view.animation.Animation;
30import android.view.animation.AnimationUtils;
31import android.widget.FrameLayout;
32import android.widget.TextView;
33
34import com.android.camera.R;
35
36public class CountDownView extends FrameLayout {
37
38    private static final String TAG = "CAM_CountDownView";
39    private static final int SET_TIMER_TEXT = 1;
40    private TextView mRemainingSecondsView;
41    private int mRemainingSecs = 0;
42    private OnCountDownFinishedListener mListener;
43    private Animation mCountDownAnim;
44    private SoundPool mSoundPool;
45    private int mBeepTwice;
46    private int mBeepOnce;
47    private boolean mPlaySound;
48    private final Handler mHandler = new MainHandler();
49
50    public CountDownView(Context context, AttributeSet attrs) {
51        super(context, attrs);
52        mCountDownAnim = AnimationUtils.loadAnimation(context, R.anim.count_down_exit);
53        // Load the beeps
54        mSoundPool = new SoundPool(1, AudioManager.STREAM_NOTIFICATION, 0);
55        mBeepOnce = mSoundPool.load(context, R.raw.beep_once, 1);
56        mBeepTwice = mSoundPool.load(context, R.raw.beep_twice, 1);
57    }
58
59    public boolean isCountingDown() {
60        return mRemainingSecs > 0;
61    };
62
63    public interface OnCountDownFinishedListener {
64        public void onCountDownFinished();
65    }
66
67    private void remainingSecondsChanged(int newVal) {
68        mRemainingSecs = newVal;
69        if (newVal == 0) {
70            // Countdown has finished
71            setVisibility(View.INVISIBLE);
72            mListener.onCountDownFinished();
73        } else {
74            Locale locale = getResources().getConfiguration().locale;
75            String localizedValue = String.format(locale, "%d", newVal);
76            mRemainingSecondsView.setText(localizedValue);
77            // Fade-out animation
78            mCountDownAnim.reset();
79            mRemainingSecondsView.clearAnimation();
80            mRemainingSecondsView.startAnimation(mCountDownAnim);
81
82            // Play sound effect for the last 3 seconds of the countdown
83            if (mPlaySound) {
84                if (newVal == 1) {
85                    mSoundPool.play(mBeepTwice, 1.0f, 1.0f, 0, 0, 1.0f);
86                } else if (newVal <= 3) {
87                    mSoundPool.play(mBeepOnce, 1.0f, 1.0f, 0, 0, 1.0f);
88                }
89            }
90            // Schedule the next remainingSecondsChanged() call in 1 second
91            mHandler.sendEmptyMessageDelayed(SET_TIMER_TEXT, 1000);
92        }
93    }
94
95    @Override
96    protected void onFinishInflate() {
97        super.onFinishInflate();
98        mRemainingSecondsView = (TextView) findViewById(R.id.remaining_seconds);
99    }
100
101    public void setCountDownFinishedListener(OnCountDownFinishedListener listener) {
102        mListener = listener;
103    }
104
105    public void startCountDown(int sec, boolean playSound) {
106        if (sec <= 0) {
107            Log.w(TAG, "Invalid input for countdown timer: " + sec + " seconds");
108            return;
109        }
110        setVisibility(View.VISIBLE);
111        mPlaySound = playSound;
112        remainingSecondsChanged(sec);
113    }
114
115    public void cancelCountDown() {
116        if (mRemainingSecs > 0) {
117            mRemainingSecs = 0;
118            mHandler.removeMessages(SET_TIMER_TEXT);
119            setVisibility(View.INVISIBLE);
120        }
121    }
122
123    private class MainHandler extends Handler {
124        @Override
125        public void handleMessage(Message message) {
126            if (message.what == SET_TIMER_TEXT) {
127                remainingSecondsChanged(mRemainingSecs -1);
128            }
129        }
130    }
131}