Detailed explanation of Android voice broadcast implementation solution (no SDK)

This article introduces a detailed explanation of the Android voice broadcast implementation solution (no SDK) and shares it with you. The details are as follows:

Function description

Similar to the voice broadcast function when Alipay collects payment: When others scan your payment code, you will hear the voice broadcast of "Alipay is 12.55 yuan."

Problems to be solved

1. Play a single voice file

2. Play the next one immediately after playing a single voice file, so that it can be continuously

3. Processing when multiple complete voice sequences need to be broadcasted (for example, Alipay receives multiple payment pushes in a short time)

Implementation ideas

1. Select MediaPlayer for playing a single file

First create a MediaPlayer instance

MediaPlayer player = new MediaPlayer();

Then set the data source, where the data source is obtained from assets, of course, you can also place the voice file in the raw folder

 fd = (path);
 ((), (),
              ());

Then call prepareAsync() method, load asynchronously, and set up listening, and start playing after loading (different from prepare method)

();
(new () {
            @Override
            public void onPrepared(MediaPlayer mp) {
              ();
            }
          });

2. Since there are more than one voice file to play, you need to monitor the playback status and play the next voice after the playback is completed.

 (new () {
            @Override
            public void onCompletion(MediaPlayer mp) {
              ();
              counter[0]++;
              if (counter[0] < ()) {
                try {
                  AssetFileDescriptor fileDescriptor = (("sound/tts_%s.mp3", (counter[0])));
                  ((), (), ());
                  ();
                } catch (IOException e) {
                  ();
                  ();
                }
              } else {
                ();
                ();
              }
            }
          });

3. Report requests multiple times in a short time, and use synchronization method to perform the next item. After one playback, synchronized + notifyAll() is used here to implement it. Of course, other methods can be used.

Code encapsulation

The function code is divided into two parts, part of which is a List composed of phonological sequences, here is VoiceTemplate;

Part of it is a functional package for playback, receiving a List, and then playing voice, which is called VoiceSpeaker;

See the end of the article for detailed code.

Code usage

For example, to play "Alipay's 12:13 Yuan" with the code as follows

final List<String> list = new VoiceTemplate()
        .prefix("success")
        .numString("12.13")
        .suffix("yuan")
        .gen();

().speak(list);

Source code

KTools

/jiangkang/KTools/blob/master/app/src/main/java/com/jiangkang/ktools/audio/

The above is all the content of this article. I hope it will be helpful to everyone's study and I hope everyone will support me more.