If you're new to Android may instead want to get started with one of the codelabs for Android developer fundamentals. You should have prior experience with developing Android apps and Android intents to follow this codelab. This codelab covers beginner-level concepts for developing with App Actions. Capabilities let Assistant know which app features support user voice requests, and how you want those requests fulfilled. As an Android developer, you implement capability elements to add App Actions. There are also some libraries which look promising to achieve what we want.With App Actions, you can use Google Assistant to jump directly into app features and complete tasks using your voice. If you want to continue to work on this approach, try to build your own implementation by capturing audio directly from the device’s microphone and stream it to a voice recognition service. However, we kept selecting players by voice recognition to present the approach we used in this tutorial. To finalize our app, we decided to use touch gestures (instead of voice recognition) to start the game, and to add points for players. We experienced that working against the system won’t help achieving our goals and stopped trying furthermore. In addition, time gaps between restarting the voice recognition cycles, block the flow of continuous voice recognition experience. Several bugs have already been reported about SpeechRecognizer api during the implementations for the similar approach that we had. As such this API is not intended to be used for continuous recognition, which would consume a significant amount of battery and bandwidth. The implementation of this API is likely to stream audio to remote servers to perform speech recognition. However, Google clearly mentions that this is not the intention of SpeechRecognizer api. We need to listen continuously to hear a phrase like “Point for Efe”. Here are the steps that we are going to take in order to choose two players by getting user voice input.ģ- Ask user “Who is the second player?” (Same as Step 1)Ĥ- Listen user input to choose the second player (Same as Step 2) The biggest challenge: Continuous Voice RecognitionĪfter selecting two players, the app decides who is going to start the game and speaks (e.g. Therefore we decide to implement a communication similar to Google Assistant by using SpeechRecognizer and TextToSpeech classes. And this conflicts with our goal to have verbal-only communication.
But if it fails to understand what user said, you have to touch the screen again. This approach displays a default view to get user speech input. Free-form Speech Input:įrom Google documentation, we see that a common way of getting a free-form speech from user is to call startActivityForResult using the ACTION_RECOGNIZE_SPEECH action and receive the result in onActivityResult. The same documentation page also provides information about Free-form Speech input, which looks promising. Good to know, but App-provided Voice Actions are not what we are looking for. You can start your app by saying "OK Google, Start MyApp" after defining a label attribute in your manifest file, for the activity that you want to start. Voice actions are also classified here as System-provided Voice Actions and App-provided Voice Actions. On the other hand, system voice actions - like “search”, “set alarm”, “initiate a phone call”, “take a picture”, “open url” - are not interesting enough for our use case app. At first, it sounds like custom voice actions might help us, unfortunately we see that Google does not accept requests for Custom Voice actions anymore. System voice actions and custom voice actions. Google defines two types of voice actions. You can find further information here about using the assistant. We want to use a voice command to take an action in our app. However, this doesn't help us to achieve what we want. This gives us the possibility to gather some information from our app, and use this information to take an action outside of our app. Starting with Android 6.0 Marshmallow, the system may open an overlaying window for the assistant on top of our app (called "Source App"). There are two ways to activate Google Assistant: by long pressing the home button or by saying "OK, Google". It is taking over the place of Google Now, day by day. It uses machine learning and artificial intelligence to learn about you every day, and you can have a conversation with Google Assistant. Google Assistant is like an upgraded sibling of Google Now. It is similar to Apple's Siri, however Google Now is platform agnostic and can be run on iOS devices as well. Google Now is a voice activated personal assistant which can search the web for you and perform some system defined tasks.
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