在res / raw文件夹中使用mp3设置铃声

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />

MediaPlayer mediaPlayer = MediaPlayer.create(getApplicationContext(), R.raw.your_mp3_file_name);
mediaPlayer.setLooping(true); // 设置铃声循环播放
mediaPlayer.start(); // 开始播放铃声

@Override
protected void onDestroy() {
    super.onDestroy();
    if (mediaPlayer != null) {
        mediaPlayer.stop();
        mediaPlayer.release();
    }
}