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[JXR] Swap out AudioRecord with MediaRecorder implementation #893

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[JXR] Swap out AudioRecord with MediaRecorder implementation #893

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d960127
swap out AudioRecord with MediaRecorder implementation for projected …
trambui09 Apr 30, 2026
aa2cddf
adddress gemini feedback
trambui09 Apr 30, 2026
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34 changes: 18 additions & 16 deletions xr/src/main/java/com/example/xr/projected/ProjectedHardware.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -39,9 +39,9 @@ import androidx.camera.core.resolutionselector.ResolutionSelector
import androidx.camera.core.resolutionselector.ResolutionStrategy
import androidx.camera.lifecycle.ProcessCameraProvider
import androidx.core.content.ContextCompat
import androidx.core.content.ContextCompat.getSystemService
import androidx.xr.projected.ProjectedContext
import androidx.xr.projected.experimental.ExperimentalProjectedApi
import java.io.File

private const val TAG = "ProjectedHardware"

Expand Down Expand Up @@ -199,13 +199,12 @@ private fun startBluetoothAudioRecording(context: Context) {
audioRecord.release()
}
}

/**
* Demonstrates how to record audio using the projected device context.
*/
@RequiresPermission(Manifest.permission.RECORD_AUDIO)
@OptIn(ExperimentalProjectedApi::class)
private fun startProjectedAudioRecording(context: Context) {
private fun startProjectedAudioRecording(context: Context, outputFile: File) {
val projectedDeviceContext = try {
ProjectedContext.createProjectedDeviceContext(context)
} catch (e: IllegalStateException) {
Expand All @@ -214,19 +213,22 @@ private fun startProjectedAudioRecording(context: Context) {
}

// [START androidxr_projected_context_audio_record]
// Initialize AudioRecord with projected device context
val audioRecord = AudioRecord.Builder()
.setAudioSource(MediaRecorder.AudioSource.CAMCORDER)
.setAudioFormat(audioFormat)
.setBufferSizeInBytes(bufferSize)
// pass in the projected device context
.setContext(projectedDeviceContext)
.build()

audioRecord.startRecording()
// [END androidxr_projected_context_audio_record]
// Initialize MediaRecorder with the projected device context
val recorder = MediaRecorder(projectedDeviceContext).apply {
setAudioSource(MediaRecorder.AudioSource.CAMCORDER)
setOutputFormat(MediaRecorder.OutputFormat.MPEG_4)
setAudioEncoder(MediaRecorder.AudioEncoder.AAC)
setAudioChannels(1)
setAudioSamplingRate(16000)
setAudioEncodingBitRate(32000)
setOutputFile(outputFile)

prepare()
start()
// [END androidxr_projected_context_audio_record]
}
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// Stop and release when done.
audioRecord.stop()
audioRecord.release()
recorder.stop()
recorder.release()
}
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