I am new to Android development. I want to make an app that is essentially a music player but the phone can vibrate to the beat of the music playing. I remember the earliest Nokia phones had this feature, I want to recreate this for fun.
My question: is this possible as an Android app? If so, what are the general approaches? Do I have to analyse the sound patterns of the song then alter the vibration intensity?
Thanks!
I got interested with this question and after deep research I figured out how to do that. So here we go.
import android.media.MediaPlayer;
import android.os.Vibrator;
private Vibrator vibrator;
private MediaPlayer player;
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
player = MediaPlayer.create(this, R.raw.music);
vibrator = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
player.start();
//HERE WE WILL START VIBRATION
Button button = (Button) findViewById(R.id.btn);
button.setOnClickListener(this);
}
public void onClick(View v){
player.stop();
vibrator.cancel();
}
This is general approach for playing music and now work tight with the method vibrate();
.
From all of constructors of class Vibrator we need this one:
public void vibrate (long milliseconds, AudioAttributes attributes);
It was added in API 21
As first parameter we can pass the duration of the song and this duration we can get this way (source):
String mediaPath = Uri.parse("android.resource://<your-package-name>/raw/filename").getPath();
MediaMetadataRetriever mmr = new MediaMetadataRetriever();
mmr.setDataSource(mediaPath);
String duration = mmr.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION);
As second parameter we need to create AudioAttributes with the help of AudioAttributes.Builder:
vibrator.vibrate(duration, new AudioAttributes.Builder()
.setUsage(AudioAttributes.USAGE_MEDIA)
.setContentType(AudioAttributes.CONTENT_TYPE_MUSIC)
.build());
Please, NOTE: I haven't tried it. But the doc said it should works fine. Let me know if that is completed way. Best regards.
P.S. Don't forget permission:
<uses-permission android:name="android.permission.VIBRATE" />