我想通过带插入式耳机的扬声器播放音频文件 .
我尝试了以下内容:MainActivity.java:
AudioManager audioManager = (AudioManager)mainActivity
.getSystemService(Context.AUDIO_SERVICE);
audioManager.setMode(AudioManager.STREAM_MUSIC);
audioManager.setSpeakerphoneOn(true);
MediaPlayer mp = MediaPlayer.create(mainActivity, R.raw.chime);
mp.setAudioStreamType(AudioManager.STREAM_RING);
mp.start();
表现:
<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
但音频仍然通过插入的耳机播放 . 如何正确插入耳机,将音频输出定向到扬声器?
EDIT 1:
我尝试了帖子Android, how to route the audio to speakers when headphones inserted?中的以下代码:
MediaPlayer mp = MediaPlayer.create(mainActivity, R.raw.chime);
AudioManager am = (AudioManager) mainActivity.getSystemService(mainActivity.AUDIO_SERVICE);
try {
mp.setAudioStreamType(AudioManager.STREAM_ALARM);
mp.setLooping(true);
mp.prepare();
} catch (IllegalArgumentException | SecurityException| IllegalStateException | IOException e) {
Log.i("TAG","Error is " + e.toString());
e.printStackTrace();
}
am.requestAudioFocus(null, AudioManager.STREAM_ALARM,AudioManager.AUDIOFOCUS_GAIN_TRANSIENT);
mp.start();
但我得到了
java.lang.IllegalStateException
任何想法如何解决这个问题?
1 回答
我将提供一个完整的代码片段(在Android 24上测试),我必须从多个提示汇总到解决方案:
并且需要在清单中设置修改音频设置的权限: