blocks|key|603606|text|您可以使用音频管理器检查这一点|type|unstyled|depth|inlineStyleRanges|entityRanges|data|603607|Audio+Manager|offset|length|603608|还有看一看|603609|Head+Set+Plugged|603610|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.android.com/reference/android/media/AudioManager.html|1|http://developer.android.com/reference/android/content/Intent.html#ACTION_HEADSET_PLUG^0|0|0|D|0|0|0|0|G|1|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|U|8|@]|9|@$D|V|E|W|1|X]]|A|$]]|$1|F|3|G|5|6|7|Y|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|Z|8|@]|9|@$D|10|E|11|1|12]]|A|$]]|$1|J|3|-4|5|6|7|13|8|@]|9|@]|A|$]]]|K|$L|$5|M|N|O|A|$P|Q]]|R|$5|M|N|O|A|$P|S]]]]

You can check this by using Audio Manager

<a href="http://developer.android.com/reference/android/media/AudioManager.html" rel="nofollow">Audio Manager</a>

and also look 

<a href="http://developer.android.com/reference/android/content/Intent.html#ACTION_HEADSET_PLUG" rel="nofollow">Head Set Plugged</a>

blocks|key|818871|text|正如您现在可能知道的，这不能使用当前的Android+API来完成。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|818872|音频硬件接口是专有的，即由制造商为其硬件编写的，并且必须支持Android系统的某些调用，以使其与使用Android+SDK开发的应用程序兼容。|818873|即使您找到了一种方法来解决缺少对一种设备的API支持的问题，这可能并不是在所有设备上都有效。您的AudioManager.setSpeakerphoneOn(false)示例可能非常适用于设备，因为这完全取决于音频硬件接口是如何编写的。我的假设是，如果没有耳机，大多数平板电脑都会对耳机和扬声器的音频路由进行同样的处理。|offset|length|style|CODE|818874|如果你想查看Nexus7的音频硬件接口代码，it's+here|818875|entityMap|0|LINK|mutability|MUTABLE|url|http://omapzoom.org/?p=device/asus/grouper.git;a=blob;f=audio/audio_hw.c;h=9a8330f9e520188d2ba40e8fe4c839a6bebdcea3;hb=HEAD^0|0|0|1C|11|0|M|9|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|U|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|V|8|@$F|W|G|X|H|I]]|9|@]|A|$]]|$1|J|3|K|5|6|7|Y|8|@]|9|@$F|Z|G|10|1|11]]|A|$]]|$1|L|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|M|$N|$5|O|P|Q|A|$R|S]]]]

As you may now be aware, this cannot be done using the current Android API.

The Audio Hardware interface is proprietary, i.e. written by the manufacturers for their hardware and has to support certain calls by the Android system to make it compatible with applications developed using the Android SDK.

Even if you find a way around the lack of API support for one device this may not work on all devices. Your <code>AudioManager.setSpeakerphoneOn(false)</code> example may very well work for devices as it all depends on how the Audio Hardware interface has been written. It would be my assumption that most tablets will treat audio routing for earpiece and speaker the same if there is no earpiece.

If you want to check out the Audio Hardware interface code for the Nexus 7, <a href="http://omapzoom.org/?p=device/asus/grouper.git;a=blob;f=audio/audio_hw.c;h=9a8330f9e520188d2ba40e8fe4c839a6bebdcea3;hb=HEAD" rel="nofollow">it's here</a>

blocks|key|603705|text|public+boolean+isEarPieceConnected()+{
++++++++AudioManager+audio+=+(AudioManager)+this
++++++++++++++++.getSystemService(Context.AUDIO_SERVICE);
++++++++if+(audio.isWiredHeadsetOn())+{
++++++++++++Toast.makeText(this,+"Connected",+Toast.LENGTH_SHORT).show();
++++++++++++return+true;
++++++++}+else+{
++++++++++++Toast.makeText(this,+"Not+Connected",+Toast.LENGTH_SHORT).show();
++++++++++++return+false;
++++++++}
++++}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|603706|您还可以检查audio.isSpeakerphoneOn()|unstyled|603707|如果我把你的问题解决了，我希望这能行得通。|603708|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|L|8|@]|9|@]|A|$]]|$1|G|3|H|5|F|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|F|7|N|8|@]|9|@]|A|$]]]|J|$]]

<pre><code>public boolean isEarPieceConnected() {
 AudioManager audio = (AudioManager) this
 .getSystemService(Context.AUDIO_SERVICE);
 if (audio.isWiredHeadsetOn()) {
 Toast.makeText(this, "Connected", Toast.LENGTH_SHORT).show();
 return true;
 } else {
 Toast.makeText(this, "Not Connected", Toast.LENGTH_SHORT).show();
 return false;
 }
 }
</code></pre>

you can also check for audio.isSpeakerphoneOn()

I hope this works if i am getting your problem right.

blocks|key|603748|text|从Android+S/12+(API+31)开始，我们有了检查内置耳机状态的新方法。全面的复制-粘贴方法如下，在较旧的系统版本中，它使用@milosmns+answer中的反射(谢谢！)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|603749|private+static+Boolean+hasEarpiece+=+null;

public+static+boolean+hasEarpiece(Context+context)+{
++++if+(hasEarpiece+!=+null)+return+hasEarpiece;

++++AudioManager+audioManager+=+(AudioManager)+context.getSystemService(Context.AUDIO_SERVICE);

++++if+(Build.VERSION.SDK_INT+>=+31)+{
++++++++List<AudioDeviceInfo>+devices+=+audioManager.getAvailableCommunicationDevices();
++++++++for+(AudioDeviceInfo+device+:+devices)+{
++++++++++++if+(device.getType()+==+AudioDeviceInfo.TYPE_BUILTIN_EARPIECE)+{
++++++++++++++++hasEarpiece+=+true;
++++++++++++++++break;
++++++++++++}
++++++++}
++++++++if+(hasEarpiece+==+null)+{
++++++++++++//+just+for+safety
++++++++++++AudioDeviceInfo+currDevice+=+audioManager.getCommunicationDevice();
++++++++++++hasEarpiece+=+currDevice+!=+null+&&
++++++++++++++++++++currDevice.getType()+==+AudioDeviceInfo.TYPE_BUILTIN_EARPIECE;
++++++++}
++++++++Log.i("EarpieceBuiltInChecker",+"hasEarpiece+detected:%25s",+hasEarpiece);
++++++++return+hasEarpiece;
++++}

++++try+{
++++++++Method+method+=+AudioManager.class.getMethod("getDevicesForStream",+Integer.TYPE);
++++++++Field+field+=+AudioManager.class.getField("DEVICE_OUT_EARPIECE");
++++++++int+earpieceFlag+=+field.getInt(null);
++++++++int+bitmaskResult+=+(int)+method.invoke(audioManager,+AudioManager.STREAM_VOICE_CALL);

++++++++hasEarpiece+=+(bitmaskResult+&+earpieceFlag)+==+earpieceFlag;
++++++++Log.i("EarpieceBuiltInChecker",+"hasEarpiece+detected:"+%2B+hasEarpiece);
++++}+catch+(Throwable+error)+{
++++++++hasEarpiece+=+false;
++++++++Log.i("EarpieceBuiltInChecker",+"hasEarpiece+detection+FAILED!");
++++}

++++return+hasEarpiece;
}|code-block|syntax|javascript|603750|我的流是AudioManager.STREAM_VOICE_CALL类型(如果适用)|offset|length|style|CODE|603751|entityMap^0|0|0|4|U|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@$I|R|J|S|K|L]]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

starting with Android S/12 (API 31) we have new methods for checking built-in earpiece presence. comprehensive copy-pasteable method below, on older system versions it is using reflection from @milosmns answer (thanks!)
<pre><code>private static Boolean hasEarpiece = null;

public static boolean hasEarpiece(Context context) {
 if (hasEarpiece != null) return hasEarpiece;

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

 if (Build.VERSION.SDK_INT &gt;= 31) {
 List&lt;AudioDeviceInfo&gt; devices = audioManager.getAvailableCommunicationDevices();
 for (AudioDeviceInfo device : devices) {
 if (device.getType() == AudioDeviceInfo.TYPE_BUILTIN_EARPIECE) {
 hasEarpiece = true;
 break;
 }
 }
 if (hasEarpiece == null) {
 // just for safety
 AudioDeviceInfo currDevice = audioManager.getCommunicationDevice();
 hasEarpiece = currDevice != null &amp;&amp;
 currDevice.getType() == AudioDeviceInfo.TYPE_BUILTIN_EARPIECE;
 }
 Log.i(&quot;EarpieceBuiltInChecker&quot;, &quot;hasEarpiece detected:%s&quot;, hasEarpiece);
 return hasEarpiece;
 }

 try {
 Method method = AudioManager.class.getMethod(&quot;getDevicesForStream&quot;, Integer.TYPE);
 Field field = AudioManager.class.getField(&quot;DEVICE_OUT_EARPIECE&quot;);
 int earpieceFlag = field.getInt(null);
 int bitmaskResult = (int) method.invoke(audioManager, AudioManager.STREAM_VOICE_CALL);

 hasEarpiece = (bitmaskResult &amp; earpieceFlag) == earpieceFlag;
 Log.i(&quot;EarpieceBuiltInChecker&quot;, &quot;hasEarpiece detected:&quot; + hasEarpiece);
 } catch (Throwable error) {
 hasEarpiece = false;
 Log.i(&quot;EarpieceBuiltInChecker&quot;, &quot;hasEarpiece detection FAILED!&quot;);
 }

 return hasEarpiece;
}
</code></pre>
my streams are <code>AudioManager.STREAM_VOICE_CALL</code> type (where applicable)

I've got an app which displays a speakerphone toggle button when used on a phone. The toggle switches audio routing between the phone's earpiece and the speakerphone. However, when the app is run on a tablet (or any device which lacks an earpiece), I'd like to remove the toggle, since all audio is routed through the speakerphone.

Ideally, I'd like to use some kind of <code>isEarpiecePresent()</code> call, or maybe check a flag on some configuration object to find this information, but I can't find anything of the sort in the API.

I attempted to work around the issue by calling <code>AudioManager.setSpeakerphoneOn(false)</code>, then checking <code>AudioManager.isSpeakerphoneOn()</code>, hoping that it would still return true and I could key off of that. The system returned <code>false</code>, even though audio is still routing through the speaker.

I'm currently thinking of checking for telephony capability, even though that doesn't exactly fit. Any other ideas?

Detect lack of earpiece (speakerphone only) on an Android device

Android

路由

我有一个应用程序，当在电话上使用时，它会显示一个免持话筒切换按钮。切换开关可在电话的耳机和免持话筒之间切换音频路由。然而，当应用程序在平板电脑(或任何没有耳机的设备)上运行时，我想取消切换，因为所有的音频都是通过免提电话发送的。理想情况下，我希望使用某种isEarpiecePresent()调用，或者可能检查某个配置对...

问检测Android设备上是否缺少耳机(仅限免持话筒)
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