MDT5_1_Ueberwachungssystem_G1/app/src/main/java/com/example/ueberwachungssystem/Detection/AudioRecorder.java

package com.example.ueberwachungssystem.Detection;

import android.content.Context;
import android.media.MediaPlayer;
import android.media.MediaRecorder;
import android.widget.Toast;

import java.io.File;
import java.io.IOException;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;

public class AudioRecorder {
    private final Context context;
    private MediaRecorder mediaRecorder = null;
    private boolean isRecording = false;
    private File outputDir;      // Default: in app files directory


    public AudioRecorder (Context context) {
        this.context = context;
        this.outputDir = context.getFilesDir();
    }

    public void startRecording() {
        // Handle logic
        if (outputDir == null)
            return;
        if (isRecording)
            return;
        isRecording = true;

        // Setup Audio Recorder for output Format: 3GP
        mediaRecorder = new MediaRecorder();
        mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
        mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
        mediaRecorder.setOutputFile(outputDir + "/" + generateFileName() + ".3gp");
        mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
        try {
            mediaRecorder.prepare();
        } catch (IOException e) {
            e.printStackTrace();
        }
        mediaRecorder.start();
    }

    public void stopRecording() {
        if (mediaRecorder != null) {
            mediaRecorder.stop();
            mediaRecorder.reset();
            mediaRecorder.release();
            mediaRecorder = null;
            isRecording = false;
            Toast.makeText(context, "audio recording saved", Toast.LENGTH_SHORT).show();
        }
    }

    public boolean isRecording(){
        return isRecording;
    }

    public void setOutputDir(File outputDir) {
        this.outputDir = outputDir;
    }

    private String generateFileName(){
        // Get the current timestamp
        LocalDateTime currentTime = LocalDateTime.now();
        // Define the format for the timestamp
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyyMMdd_HHmmss");
        // Return the timestamp as a string
        return currentTime.format(formatter);
    }
}