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Xamarin Mobile Development for Android Cookbook

You're reading from   Xamarin Mobile Development for Android Cookbook Over 80 hands-on recipes to unleash full potential for Xamarin in development and monetization of feature-packed, real-world Android apps

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Product type Paperback
Published in Nov 2015
Publisher
ISBN-13 9781784398576
Length 456 pages
Edition 1st Edition
Languages
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Author (1):
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Matthew Leibowitz Matthew Leibowitz
Author Profile Icon Matthew Leibowitz
Matthew Leibowitz
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Table of Contents (15) Chapters Close

Preface 1. Working with Xamarin.Android FREE CHAPTER 2. Showing Views and Handling Fragments 3. Managing App Data 4. Presenting App Data 5. Communicating with the Outside World 6. Using Background Tasks 7. Notifying Users 8. Interacting with Other Apps 9. Presenting Multimedia 10. Responding to the User 11. Connecting to Wearables 12. Adding In-App Billing 13. Publishing Apps Index

Recording an audio


There may be several reasons to record an audio in an app. We could be processing the audio for speech recognition or we could just be making a game that requires some phrase from the user.

How to do it...

Our app can record audio using the MediaRecorder type, which can capture audio from a variety of sources and in various formats:

  1. Recording any part of the user's surroundings, such as the audio, requires a permission:

    [assembly: UsesPermission(Manifest.Permission.RecordAudio)]
  2. To record audio, we need a MediaRecorder instance with the audio source set to the microphone:

    var recorder = new MediaRecorder();
    recorder.SetAudioSource(AudioSource.Mic);
  3. Then, we must specify in the format in which we want to persist the audio file:

    recorder.SetOutputFormat(OutputFormat.ThreeGpp);
    recorder.SetAudioEncoder(AudioEncoder.Default);
  4. Next, we specify where to save the audio file using the SetOutputFile method:

    var path = FilesDir.AbsolutePath;
    path = Path.Combine(path, "Recording", "audio.3gp...
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