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[英]Check if headset is connected in Android application. Bluetooth and wired
[英]Check if headset is connected on different API levels
我有一個針對API Level 19+的應用程序。 我需要檢查耳機是否已連接(有線或藍牙)。
我看到AudioManager.isWiredHeadsetOn()
已過時從API級別16開始和文檔提供使用AudioManager.getDevices()
這是只引進API等級23起。
問題:檢查耳機是否已連接到API級別16 - 22的正確方法是什么?
注意:我知道我仍然可以使用已棄用的方法,但我不想這樣做。 如果他們棄用它,他們應該引入替代API(我找不到)。
您需要偵聽ACTION_HEADSET_PLUG,它會觸發耳機事件並且即使沒有任何變化也會定期觸發。
從我現有的代碼我在onCreate
我的主要服務:
// 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);
我的顯示器看起來像這樣:
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);
}
}
}
清單中沒有任何東西需要監聽此廣播事件。
由於AndroidStudio警告AudioManager.getDevices需要VersionCode M,最好的方法是進行版本檢查,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
希望我能提供幫助。 最好的問候,Cs
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