我有一个针对API级别19+的应用程序。我需要检查是否连接了耳机(有线或蓝牙)。
我看到从API级别16开始不推荐使用AudioManager.isWiredHeadsetOn()
,并且该文档提供使用AudioManager.getDevices()
的功能,而该{@ 1}仅从API级别23开始引入。
问题:检查耳机是否连接了API级别16-22的正确方法是什么?
注意:我知道我仍然可以使用不推荐使用的方法,但是我不想这样做。如果他们不赞成这样做,他们应该引入了替代API(尽管我找不到)。
答案 0 :(得分:1)
由于AndroidStudio警告AudioManager.getDevices需要VersionCode M,所以最好的方法是进行版本检查,如下所示:
// ... some code
boolean isWiredHeadsetOn=false;
AudioManager mAudioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
Log.d(TAG, "onCreate:::: retrieved AudioManager instance");
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
Log.d(TAG, "onCreate:::: BuildVersion>=M");
AudioDeviceInfo[] mAudioDeviceInfos = mAudioManager.getDevices(AudioManager.GET_DEVICES_OUTPUTS);
Log.d(TAG, "onCreate:::: got AudioDeviceInfo[]");
for (int i = 0; i < mAudioDeviceInfos.length; i++) {
if (mAudioDeviceInfos[i].getType() == AudioDeviceInfo.TYPE_WIRED_HEADSET) {
Log.d(TAG, "onCreate:::: \n\nfind wiredHeadset!!!\n\n");
isWiredHeadsetOn=true;
} else {
Log.d(TAG, "onCreate:::: find device type: " + mAudioDeviceInfos[i].getType() + ", id: " + mAudioDeviceInfos[i].getProductName());
}
}
} else {
Log.d(TAG, "onCreate:::: BuildVersion<M");
isWiredHeadsetOn=mAudioManager.isWiredHeadsetOn();
}
// ... continue code
希望我能帮上忙。最好的问候,CS
答案 1 :(得分:1)
您需要收听ACTION_HEADSET_PLUG,该操作会在头戴式耳机事件时触发,并且即使没有任何变化,显然也会定期触发。
从我现有的代码中,我可以在主要服务的onCreate
中使用它:
// listen for headphone events so we can auto switch the audio output when headphones are plugged in
myHeadphoneMonitor = new HeadphoneMonitor();
android.content.IntentFilter headphone_filter = new
android.content.IntentFilter(Intent.ACTION_HEADSET_PLUG);
registerReceiver(myHeadphoneMonitor, headphone_filter);
我的显示器如下:
package com.myname.foo;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
import android.os.Message;
public class HeadphoneMonitor extends BroadcastReceiver
{
public boolean headphonesActive=false;
@Override
public void onReceive(final Context context, final Intent intent)
{
if (intent.getAction().equals(Intent.ACTION_HEADSET_PLUG))
{
int state = intent.getIntExtra("state", -1);
switch (state) {
case 0:
Log.d("HeadphoneMonitor", "Headset is unplugged");
headphonesActive=false;
break;
case 1:
Log.d("HeadphoneMonitor", "Headset is plugged in");
headphonesActive=true;
break;
default:
Log.d("HeadphoneMonitor", "I have no idea what the headset state is");
break;
}
// push this event onto the queue to be processed by the Handler
Message msg = MyApp.uiHandler.obtainMessage(MyApp.HEADPHONE_EVENT);
MyApp.uiHandler.sendMessage(msg);
}
}
}
清单中不需要任何内容来监听此广播事件。