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      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 
     17 package com.android.camera.ui;
     18 
     19 import java.util.Locale;
     20 
     21 import android.content.Context;
     22 import android.media.AudioManager;
     23 import android.media.SoundPool;
     24 import android.os.Handler;
     25 import android.os.Message;
     26 import android.util.AttributeSet;
     27 import android.util.Log;
     28 import android.view.View;
     29 import android.view.animation.Animation;
     30 import android.view.animation.AnimationUtils;
     31 import android.widget.FrameLayout;
     32 import android.widget.TextView;
     33 
     34 import com.android.camera2.R;
     35 
     36 public 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 }