From 10e5cb3e61afd6d820bcb222d0f07f7c2d29ac9e Mon Sep 17 00:00:00 2001
From: Bastian Kohler <kohlerba68671@th-nuernberg.de>
Date: Sun, 18 Jun 2023 12:57:50 +0200
Subject: [PATCH] Added Audio Recorder. Its working

---
 .../ueberwachungssystem/AudioRecorder.java    | 83 +++++++++++++++++++
 .../ueberwachungssystem/MainActivity.java     |  5 +-
 2 files changed, 87 insertions(+), 1 deletion(-)
 create mode 100644 app/src/main/java/com/example/ueberwachungssystem/AudioRecorder.java

diff --git a/app/src/main/java/com/example/ueberwachungssystem/AudioRecorder.java b/app/src/main/java/com/example/ueberwachungssystem/AudioRecorder.java
new file mode 100644
index 0000000..df71c86
--- /dev/null
+++ b/app/src/main/java/com/example/ueberwachungssystem/AudioRecorder.java
@@ -0,0 +1,83 @@
+package com.example.ueberwachungssystem;
+
+import android.content.Context;
+import android.media.MediaPlayer;
+import android.media.MediaRecorder;
+
+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;
+        }
+    }
+
+    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);
+    }
+
+    public void playAudio() {
+        MediaPlayer mp = new MediaPlayer();
+        try {
+            mp.setDataSource(context.getFilesDir() + "/audio.3gp");
+            mp.prepare();
+            mp.start();
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+}
diff --git a/app/src/main/java/com/example/ueberwachungssystem/MainActivity.java b/app/src/main/java/com/example/ueberwachungssystem/MainActivity.java
index 377e890..463c83e 100644
--- a/app/src/main/java/com/example/ueberwachungssystem/MainActivity.java
+++ b/app/src/main/java/com/example/ueberwachungssystem/MainActivity.java
@@ -41,6 +41,7 @@ public class MainActivity extends AppCompatActivity {
 
 
 
+        AudioRecorder audioRecorder = new AudioRecorder(this);
 
         // video Stuff
         VideoDetector vd = new VideoDetector(this);
@@ -55,7 +56,6 @@ public class MainActivity extends AppCompatActivity {
         vd.startDetection();
 
 
-
         ToggleButton toggleButton = findViewById(R.id.toggleButton);
         toggleButton.setOnClickListener(new View.OnClickListener() {
             @Override
@@ -64,10 +64,13 @@ public class MainActivity extends AppCompatActivity {
                 {
                     //vd.startDetection();
                     vd.startRecording();
+                    audioRecorder.startRecording();
+
                 }
                 else {
                     //vd.stopDetection();
                     vd.stopRecording();
+                    audioRecorder.stopRecording();
                 }
             }
         });