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In diesem Leitfaden werden Kommunikationsanwendungen wie Voice over Internet Protocol (VoIP) beschrieben, die den Audio- und hörbaren Gerätestatus selbst verwalten möchten.
Audiorückruf registrieren
Erstelle zuerst ein AudioDeviceCallback, das deine App benachrichtigt, wenn Audiogeräte eine Verbindung zum Gerät herstellen oder trennen.
Mit getAvailableCommuncationDevices() sehen Sie, welche Geräte für VoIP-Anrufe verfügbar sind. Prüfe mit AudioDeviceInfo, ob das Gerät ein BLE-Headset ist. In diesem Beispiel wird nach dem ersten Gerät gesucht, das BLE Audio unterstützt. Sie könnten aber auch alle unterstützten Geräte ermitteln und Nutzern die Wahl lassen.
Kotlin
// Get list of currently available devices
val devices = audioManager.availableCommunicationDevices
// User choose one of the devices, let's say, TYPE_BLE_HEADSET
val userSelectedDeviceType = AudioDeviceInfo.TYPE_BLE_HEADSET
//for the device from the list
var selectedDevice: AudioDeviceInfo? = null
for (device in devices) {
if (device.type == userSelectedDeviceType) {
selectedDevice = device
break
}
}
Java
// Get list of currently available devices
List<AudioDeviceInfo> devices = audioManager.getAvailableCommunicationDevices();
// User choose one of the devices, for example, TYPE_BLE_HEADSET
int userSelectedDeviceType = AudioDeviceInfo.TYPE_BLE_HEADSET;
// Filter for the device from the list
AudioDeviceInfo selectedDevice = null;
for (AudioDeviceInfo device : devices) {
if (device.getType() == userSelectedDeviceType) {
selectedDevice = device;
break;
}
}
Kommunikationsgerät festlegen
Wenn Sie ein kompatibles Gerät gefunden haben, verwenden Sie setCommunicationDevice, um das Gerät festzulegen, an das die Route weitergeleitet werden soll. Wenn du das Ergebnis prüfst, wird deine App darüber informiert, ob der Audio-Manager versucht, das Gerät festzulegen, oder ob ein Fehler aufgetreten ist.
Kotlin
val result = audioManager.setCommunicationDevice(selectedDevice)
if (!result) {
// Handle error.
}
// Wait for currentCommunicationDevice to become selectedDevice with a timeout (e.g. 30s)
Java
boolean result = audioManager.setCommunicationDevice(selectedDevice);
if (!result) {
// Handle error.
}
// Wait for currentCommunicationDevice to become selectedDevice with a timeout (e.g. 30s)
Nachdem das BLE Audio-Gerät eingerichtet wurde, hat der Audiostream beim Tätigen eines Anrufs das richtige Audiorouting.
Sitzung beenden
Löschen Sie das aktive Kommunikationsgerät, nachdem Ihre App einen Anruf oder eine Sitzung beendet hat. Dies trägt zu einer positiven Erfahrung des Benutzers beim Wechseln zwischen verschiedenen Anwendungen bei.
Kotlin
// Clear the selection, ready for next call
audioManager.clearCommunicationDevice()
Java
// Clear the selection, ready for next call
audioManager.clearCommunicationDevice();
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Zuletzt aktualisiert: 2025-08-13 (UTC).
[[["Leicht verständlich","easyToUnderstand","thumb-up"],["Mein Problem wurde gelöst","solvedMyProblem","thumb-up"],["Sonstiges","otherUp","thumb-up"]],[["Benötigte Informationen nicht gefunden","missingTheInformationINeed","thumb-down"],["Zu umständlich/zu viele Schritte","tooComplicatedTooManySteps","thumb-down"],["Nicht mehr aktuell","outOfDate","thumb-down"],["Problem mit der Übersetzung","translationIssue","thumb-down"],["Problem mit Beispielen/Code","samplesCodeIssue","thumb-down"],["Sonstiges","otherDown","thumb-down"]],["Zuletzt aktualisiert: 2025-08-13 (UTC)."],[],[],null,["# Audio Manager self-managed call guide\n\nThis guide covers communication applications, such as Voice over Internet Protocol (VoIP), that want to self-manage their audio and hearable device state.\n| **Note:** Starting in Android 13 (API level 33), applications must migrate from [`AudioManager#startBluetoothSco()`](/reference/android/media/AudioManager#startBluetoothSco()) to [`AudioManager#setCommunicationDevice()`](/reference/android/media/AudioManager#setCommunicationDevice(android.media.AudioDeviceInfo)) to support upcoming BLE audio headsets. This change is backward-compatible with Hands-Free Profile (HFP) devices.\n\nRegister audio callback\n-----------------------\n\nFirst, create an `AudioDeviceCallback`, which notifies your app when audio devices connect or disconnect from the device. \n\n### Kotlin\n\n```kotlin\nval audioDeviceCallback: AudioDeviceCallback = object : AudioDeviceCallback() {\n override fun onAudioDevicesAdded(addedDevices: Array) {}\n override fun onAudioDevicesRemoved(removedDevices: Array) {}\n}\n\naudioManager.registerAudioDeviceCallback(audioDeviceCallback)\n```\n\n### Java\n\n```java\nfinal AudioDeviceCallback audioDeviceCallback = new AudioDeviceCallback() {\n @Override\n public void onAudioDevicesAdded(AudioDeviceInfo[] addedDevices) {\n }\n\n @Override\n public void onAudioDevicesRemoved(AudioDeviceInfo[] removedDevices) {\n // Handle device removal\n }\n};\n\naudioManager.registerAudioDeviceCallback(audioDeviceCallback);\n```\n\nCheck for active communication device\n-------------------------------------\n\nThe audio manager lets you know which communication device is currently active. \n\n### Kotlin\n\n```kotlin\nval currentCommunicationDevice: AudioDeviceInfo? = audioManager.communicationDevice\n```\n\n### Java\n\n```java\nAudioDeviceInfo currentCommunicationDevice = audioManager.getCommunicationDevice();\n```\n\nListening for when a communication device has changed lets your app know when routing is applied and the device that you selected is active. \n\n### Kotlin\n\n```kotlin\nval listener =\n OnCommunicationDeviceChangedListener { device -\u003e // Handle changes\n currentCommunicationDevice = device\n }\naudioManager.addOnCommunicationDeviceChangedListener(executor, listener)\n```\n\n### Java\n\n```java\nAudioManager.OnCommunicationDeviceChangedListener listener = \n new AudioManager.OnCommunicationDeviceChangedListener() {\n @Override\n void onCommunicationDeviceChanged(AudioDeviceInfo device) {\n // Handle changes\n currentCommunicationDevice = device;\n }\n};\nAudioManager.addOnCommunicationDeviceChangedListener(executor, listener);\n```\n\nFind BLE audio device\n---------------------\n\nUse [`getAvailableCommuncationDevices()`](/reference/android/media/AudioManager#getAvailableCommunicationDevices()) to see which devices are available for a VoIP call. Use `AudioDeviceInfo` to see if the device is a BLE headset. This example looks for the first device that supports BLE Audio, but you might also consider finding all supported devices and allowing users to choose. \n\n### Kotlin\n\n\n // Get list of currently available devices\n val devices = audioManager.availableCommunicationDevices\n\n // User choose one of the devices, let's say, TYPE_BLE_HEADSET\n val userSelectedDeviceType = AudioDeviceInfo.TYPE_BLE_HEADSET\n\n //for the device from the list\n var selectedDevice: AudioDeviceInfo? = null\n for (device in devices) {\n if (device.type == userSelectedDeviceType) {\n selectedDevice = device\n break\n }\n }\n\n### Java\n\n\n // Get list of currently available devices\n List\u003cAudioDeviceInfo\u003e devices = audioManager.getAvailableCommunicationDevices();\n\n // User choose one of the devices, for example, TYPE_BLE_HEADSET\n int userSelectedDeviceType = AudioDeviceInfo.TYPE_BLE_HEADSET;\n\n // Filter for the device from the list\n AudioDeviceInfo selectedDevice = null;\n for (AudioDeviceInfo device : devices) {\n if (device.getType() == userSelectedDeviceType) {\n selectedDevice = device;\n break;\n }\n }\n\nSet communication device\n------------------------\n\nAfter you find a compatible device, use `setCommunicationDevice` to set the device you wish to route to. Checking the result informs your app if the audio manager is trying to set the device or if it encountered an error. \n\n### Kotlin\n\n\n val result = audioManager.setCommunicationDevice(selectedDevice)\n if (!result) {\n // Handle error.\n }\n // Wait for currentCommunicationDevice to become selectedDevice with a timeout (e.g. 30s)\n\n### Java\n\n\n boolean result = audioManager.setCommunicationDevice(selectedDevice);\n if (!result) {\n // Handle error.\n }\n // Wait for currentCommunicationDevice to become selectedDevice with a timeout (e.g. 30s)\n\n| **Note:** Once you set a communication device, wait a maximum of 30 seconds. Unless an error occurs, `AudioDeviceCallback` is called within 30 seconds. If an error occurs, call `clearCommuncationDevice()`, and then call `setCommunicationDevice()`.\n\nNow that the BLE Audio device has been set, when placing a call, the audio stream will have the correct audio routing.\n\nEnd the session\n---------------\n\nAfter your app finishes a call or session, clear the active communication device. This helps ensure the user has a great experience when moving between different applications. \n\n### Kotlin\n\n\n // Clear the selection, ready for next call\n audioManager.clearCommunicationDevice()\n\n### Java\n\n\n // Clear the selection, ready for next call\n audioManager.clearCommunicationDevice();"]]