Way to nest multiple voice triggers when launching an app with GDK - google-glass

Question

Is there a way to nest voice triggers when launching an app on Google Glass using the GDK? For example instead of just saying "ok, glass" -> "What's its power level?" I'd like to have the app present an option. For example "ok, glass" -> "What's its power level?" -> "Over 9000" OR "Under 9000". Any help would be great!

Answer 1

If you have multiple activities/services installed on Glass that have the same voice trigger intent filter, all of their names (based on the android:label attribute of the <activity> or <service> tag in AndroidManifest.xml) will appear in a disambiguation "submenu" when you speak that voice trigger.
For example (assume that res/xml/play_a_game_trigger.xml represents a voice trigger for the string "play a game"):
<activity android:label="Tennis">
<intent-filter>
<action android:name="com.google.android.glass.action.VOICE_TRIGGER" />
</intent-filter>
<meta-data android:name="com.google.android.glass.VoiceTrigger"
android:resource="#xml/play_a_game_trigger" />
</activity>
<activity android:label="Bowling">
<intent-filter>
<action android:name="com.google.android.glass.action.VOICE_TRIGGER" />
</intent-filter>
<meta-data android:name="com.google.android.glass.VoiceTrigger"
android:resource="#xml/play_a_game_trigger" />
</activity>
would give you a voice menu flow that looks like
ok glass → play a game → Tennis
Bowling
Do note, however, that this menu would also include activities/services from other APKs that use the same voice trigger as well.
You can find more details at the Voice Input page of the GDK documentation.

Answer 2

The proper way to do this is using an input tag inside the trigger
<trigger keyword="#string/start_app" >
<input prompt="#string/promt_text" />
</trigger>
This prompts an input and waits for more audio speech.
Then in your activity you can capture this text with:
ArrayList<String> text = getIntent().getExtras().getStringArrayList(RecognizerIntent.EXTRA_RESULTS);