Audio Recorder in Android with Example

In Android for recording audio or video, there is a built-in class called MediaRecorder. This class in Android helps to easily record video and audio files. The Android multimedia framework provides built-in support for capturing and encoding common audio and video formats. In android for recording audio, we will use a device microphone along with MediaRecorder Class and for recording video, we will use the user's device Camera and MediaRecorder Class. Now in this article, we will see the implementation of an audio recorder in Android.

Important Methods of MediaRecorder Class

Step by Step Implementation

Step 1: Create a New Project

To create a new project in Android Studio please refer to How to Create/Start a New Project in Android Studio.

Step 2: Working with manifest file

Navigate to app > manifests > AndroidManifest.xml and add the following permission under the <manifest/> tag. 

<uses-permission android:name="android.permission.RECORD_AUDIO"/>

In the same file, under the <application/> tag add the following lines of code for FileProvider.

<provider
 android:name="androidx.core.content.FileProvider"
 android:authorities="${applicationId}.provider"
 android:exported="false"
 android:grantUriPermissions="true">
 <meta-data
 android:name="android.support.FILE_PROVIDER_PATHS"
 android:resource="@xml/file_paths" />
</provider>

Navigate to app > res > xml, right click and select New > XML Resource File and set the name as file_paths.xml and add the following code to the file.

<?xml version="1.0" encoding="utf-8"?>
<paths>
 <external-files-path
 name="external_files"
 path="." />
</paths>

Step 3: Adding dependencies

Navigate to Gradle Scripts > build.gradle.kts (Module :app) and add the following dependencies

dependencies {
 ...
 implementation ("com.github.massoudss:waveformSeekBar:5.0.2")
 implementation ("com.github.lincollincol:amplituda:2.2.2")
}

Refer to the this repo to read the documentation for the dependencies.

Navigate to Gradle Scripts > settings.gradle.kts and add the following line under repositories {}

dependencyResolutionManagement {
 ...
 repositories {
 ...
 maven { setUrl("https://jitpack.io/") }
 }
}

Step 4: Adding drawable

Navigate to app > res > drawables, right click on the folder and select New Drawable Resource file and add the following drawables.

Step 5: Working with the activity_main.xml file

Navigate to the app > res > layout > activity_main.xml. Comments are added inside the code to understand the code in more detail. Create a new layout for each item of the recycler view and name it item_audio_recording.xml.

Design UI:

Step 6: Creating a Model class

Navigate to app > java > {package-name}, right click and select New Java/Kotlin Class and set the name as AudioRecording and add the following code.

AudioRecordingFile:

Step 7: Creating an Adapter

Navigate to app > java > {package-name}, right click and select New Java/Kotlin Class and set the name as AudioRecordingAdapter and add the following code.

AudioRecordingAdapterFile:

Step 8: Working with the MainActivity file

Navigate to the app > java > Your app's package name > MainActivity. Below is the code for the MainActivity file. Comments are added inside the code to understand the code in more detail. 

Refer to the following github repo to get the entire code: Audio-Recorder-in-Android

Output: