Вы можете сделать это следующим образом:
//Import audio manager
import android.media.AudioManager;
public class MyVideoCallActivity extends AppCompatActivity {
private AudioManager audioManager;
@Override
protected void onCreate(Bundle savedInstanceState) {
//.....SOME CODE
//Start Video call method
startVideoCall();
}
public void startVideoCall() {
//Setup audio manager that will output sound to speaker
audioManager = (AudioManager) getSystemService(AUDIO_SERVICE);
if (audioManager != null) {
audioManager.setSpeakerphoneOn(true);
}
//...OTHER CODE that set up other views and stuff
}
//Later onDestroy revert to defaults.
@Override
protected void onDestroy() {
super.onDestroy();
if (audioManager != null) {
audioManager.setSpeakerphoneOn(false);
}
}
}
Самая важная часть это, Менеджер импорта аудио:
import android.media.AudioManager;
Тогда:
AudioManager audioManager = (AudioManager) getSystemService(AUDIO_SERVICE);
if (audioManager != null) {
audioManager.setSpeakerphoneOn(true);
}