android - 检查耳机是否插入

Question

如果耳机已插入，我似乎无法在android上找到一种方法。我找到了各种解决方案，但它们似乎总是返回错误。唯一似乎可以正常工作的是 a BroadcastReceiver，但这不是我需要的：

我只需要这样的东西

if(headphones plugged in) {
}

有这样的功能吗？它需要一些特殊的权限吗？

Answer 1

您可以使用此代码检查耳机是否已插入

AudioManager audioManager = (AudioManager)getSystemService(Context.AUDIO_SERVICE);
audioManager.isWiredHeadsetOn();

（不要担心弃用，它仍然可用于仅检查耳机是否已插入。）

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

适用于 Android 2.0 +

Answer 2

AudioManager.isWiredHeadsetOn() 已弃用。因此，您需要改用AudioManager.getDevices()方法：

private boolean isHeadphonesPlugged(){
        AudioManager audioManager = (AudioManager)getSystemService(Context.AUDIO_SERVICE);
        AudioDeviceInfo[] audioDevices = audioManager.getDevices(AudioManager.GET_DEVICES_ALL);
        for(AudioDeviceInfo deviceInfo : audioDevices){
            if(deviceInfo.getType()==AudioDeviceInfo.TYPE_WIRED_HEADPHONES
                    || deviceInfo.getType()==AudioDeviceInfo.TYPE_WIRED_HEADSET){
                return true;
            }
        }
        return false;
    }

Answer 3

使用此代码...

AudioManager am1 = (AudioManager)getSystemService(Context.AUDIO_SERVICE);
Log.i("WiredHeadsetOn = ", am1.isWiredHeadsetOn()+"");
Log.i("MusicActive = ", am1.isMusicActive()+"");
Log.i("SpeakerphoneOn = ", am1.isSpeakerphoneOn()+"");

Answer 4

audioManager.isWiredHeadsetOn()根据以下代码已弃用android.media.AudioManager

/**
 * Checks whether a wired headset is connected or not.
 * <p>This is not a valid indication that audio playback is
 * actually over the wired headset as audio routing depends on other conditions.
 *
 * @return true if a wired headset is connected.
 *         false if otherwise
 * @deprecated Use {@link AudioManager#getDevices(int)} instead to list available audio devices.
 */
public boolean isWiredHeadsetOn() {
    if (AudioSystem.getDeviceConnectionState(DEVICE_OUT_WIRED_HEADSET,"")
            == AudioSystem.DEVICE_STATE_UNAVAILABLE &&
        AudioSystem.getDeviceConnectionState(DEVICE_OUT_WIRED_HEADPHONE,"")
            == AudioSystem.DEVICE_STATE_UNAVAILABLE &&
        AudioSystem.getDeviceConnectionState(DEVICE_OUT_USB_HEADSET, "")
          == AudioSystem.DEVICE_STATE_UNAVAILABLE) {
        return false;
    } else {
        return true;
    }
}

所以我们需要使用AudioManager#getDevices如下方法

private boolean isWiredHeadsetOn(){
    AudioManager audioManager = (AudioManager)getSystemService(Context.AUDIO_SERVICE);
    AudioDeviceInfo[] audioDevices = audioManager.getDevices(AudioManager.GET_DEVICES_ALL);
    for(AudioDeviceInfo deviceInfo : audioDevices){
        if(deviceInfo.getType()==AudioDeviceInfo.TYPE_WIRED_HEADPHONES
                || deviceInfo.getType()==AudioDeviceInfo.TYPE_WIRED_HEADSET){
            return true;
        }
    }
    return false;
}