调节音量大小

最新推荐文章于 2025-06-13 09:02:07 发布

原创最新推荐文章于 2025-06-13 09:02:07 发布 · 1k 阅读

0 ·

CC 4.0 BY-SA版权

文章标签：

#Android #音量

public boolean onKeyDown(int keyCode, KeyEvent event) {
		AudioManager am = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
		int vol = am.getStreamVolume(AudioManager.STREAM_MUSIC);
		if (keyCode==KeyEvent.KEYCODE_VOLUME_DOWN) {
			am.setStreamVolume(AudioManager.STREAM_MUSIC, vol-1, 1);
			Toast.makeText(this, "点击了减小音量", Toast.LENGTH_SHORT).show();
			return true;
		}else if (keyCode==KeyEvent.KEYCODE_VOLUME_UP) {
			am.setStreamVolume(AudioManager.STREAM_MUSIC, vol+1, 1);
			Toast.makeText(this, "点击了增加音量", Toast.LENGTH_SHORT).show();
			return true;
		}
		return super.onKeyDown(keyCode, event);
	}