AlarmVolumePreference.java revision e84dc3edceb9cc5e272816ed53cc31ad59eb16dc 
1/*
2 * Copyright (C) 2015 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.deskclock.settings;
18
19import android.content.Context;
20import android.database.ContentObserver;
21import android.media.AudioManager;
22import android.provider.Settings;
23import android.support.v7.preference.Preference;
24import android.support.v7.preference.PreferenceViewHolder;
25import android.util.AttributeSet;
26import android.view.View;
27import android.widget.ImageView;
28import android.widget.SeekBar;
29
30import com.android.deskclock.R;
31import com.android.deskclock.RingtonePreviewKlaxon;
32import com.android.deskclock.data.DataModel;
33
34public class AlarmVolumePreference extends Preference {
35
36    private static final long ALARM_PREVIEW_DURATION_MS = 2000;
37
38    private SeekBar mSeekbar;
39    private ImageView mAlarmIcon;
40    private boolean mPreviewPlaying;
41
42    public AlarmVolumePreference(Context context, AttributeSet attrs) {
43        super(context, attrs);
44    }
45
46    @Override
47    public void onBindViewHolder(PreferenceViewHolder holder) {
48        super.onBindViewHolder(holder);
49
50        // Disable click feedback for this preference.
51        holder.itemView.setClickable(false);
52
53        final Context context = getContext();
54        final AudioManager audioManager =
55                (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
56        mSeekbar = (SeekBar) holder.findViewById(R.id.alarm_volume_slider);
57        mSeekbar.setMax(audioManager.getStreamMaxVolume(AudioManager.STREAM_ALARM));
58        mSeekbar.setProgress(audioManager.getStreamVolume(AudioManager.STREAM_ALARM));
59        mAlarmIcon = (ImageView) holder.findViewById(R.id.alarm_icon);
60        updateIcon();
61
62        final ContentObserver volumeObserver = new ContentObserver(mSeekbar.getHandler()) {
63            @Override
64            public void onChange(boolean selfChange) {
65                // Volume was changed elsewhere, update our slider.
66                mSeekbar.setProgress(audioManager.getStreamVolume(
67                        AudioManager.STREAM_ALARM));
68            }
69        };
70
71        mSeekbar.addOnAttachStateChangeListener(new View.OnAttachStateChangeListener() {
72            @Override
73            public void onViewAttachedToWindow(View v) {
74                context.getContentResolver().registerContentObserver(Settings.System.CONTENT_URI,
75                        true, volumeObserver);
76            }
77
78            @Override
79            public void onViewDetachedFromWindow(View v) {
80                context.getContentResolver().unregisterContentObserver(volumeObserver);
81            }
82        });
83
84
85        mSeekbar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
86            @Override
87            public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
88                if (fromUser) {
89                    audioManager.setStreamVolume(
90                            AudioManager.STREAM_ALARM, seekBar.getProgress(), 0);
91                }
92                updateIcon();
93            }
94
95            @Override
96            public void onStartTrackingTouch(SeekBar seekBar) {
97            }
98
99            @Override
100            public void onStopTrackingTouch(SeekBar seekBar) {
101                if (!mPreviewPlaying) {
102                    RingtonePreviewKlaxon.start(
103                            context, DataModel.getDataModel().getDefaultAlarmRingtoneUri());
104                    mPreviewPlaying = true;
105
106                    seekBar.postDelayed(new Runnable() {
107                        @Override
108                        public void run() {
109                            RingtonePreviewKlaxon.stop(context);
110                            mPreviewPlaying = false;
111                        }
112                    }, ALARM_PREVIEW_DURATION_MS);
113                }
114            }
115        });
116    }
117
118    private void updateIcon() {
119        mAlarmIcon.setImageResource(mSeekbar.getProgress() == 0 ?
120                R.drawable.ic_alarm_off_24dp : R.drawable.ic_alarm_small_24dp);
121    }
122}
123