blob: 3c92010b67fbe661b982203b57ec7af475933c47 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
|
/*
* Copyright 2020 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.settings.tts;
import android.app.Application;
import android.speech.tts.TextToSpeech;
import android.util.Pair;
import androidx.lifecycle.AndroidViewModel;
/**
* A helper view model to protect the TTS object from being destroyed and
* recreated on orientation change.
*/
public class TextToSpeechViewModel extends AndroidViewModel {
private TextToSpeech mTts;
// Save the application so we can use it as the TTS context
private final Application mApplication;
public TextToSpeechViewModel(Application application) {
super(application);
mApplication = application;
}
/*
* Since the view model now controls the TTS object, we need to handle shutting it down
* ourselves.
*/
@Override
protected void onCleared() {
shutdownTts();
}
protected void shutdownTts() {
mTts.shutdown();
mTts = null;
}
/*
* An accessor method to get the TTS object. Returns a pair of the TTS object and a boolean
* indicating whether the TTS object was newly created or not.
*/
protected Pair<TextToSpeech, Boolean> getTtsAndWhetherNew(
TextToSpeech.OnInitListener listener) {
boolean ttsCreated = false;
if (mTts == null) {
mTts = new TextToSpeech(this.mApplication, listener);
ttsCreated = true;
}
return Pair.create(mTts, ttsCreated);
}
}
|