WIP: audio recorder

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

@@ -0,0 +1,76 @@
+package com.example.ueberwachungssystem;
+
+import android.content.Context;
+import android.hardware.Camera;
+import android.media.CamcorderProfile;
+import android.media.MediaPlayer;
+import android.media.MediaRecorder;
+import android.util.Log;
+import android.view.SurfaceView;
+import android.widget.VideoView;
+
+import java.io.File;
+import java.io.IOException;
+
+public class AudioRecorder {
+    private final Context context;
+    private Camera camera;
+    private MediaRecorder mediaRecorder = null;
+    private SurfaceView surfaceView;
+
+    public AudioRecorder (Context context) {
+        this.context = context;
+        this.surfaceView = new SurfaceView(context);
+    }
+
+
+    public void startRecording() {
+
+        mediaRecorder = new MediaRecorder();
+
+        mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
+        mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
+        mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
+        mediaRecorder.setOutputFile(context.getFilesDir() + "/audio.mp3");
+
+
+        try {
+            mediaRecorder.prepare();
+            mediaRecorder.start();
+        } catch (IOException e) {
+            Log.e("audioRecorder", "prepare() failed");
+        }
+    }
+
+    public void stopRecording() {
+        if (mediaRecorder != null) {
+            try {
+                mediaRecorder.stop();
+                mediaRecorder.release();
+                mediaRecorder = null;
+            } catch (RuntimeException e) {
+                // RuntimeException may be thrown if the MediaRecorder is in an invalid state
+                e.printStackTrace();
+            }
+        }
+    }
+
+    public void playAudio() {
+        MediaPlayer mp = new MediaPlayer();
+        try {
+            mp.setDataSource(context.getFilesDir() + "/audio.mp3");
+            mp.prepare();
+            mp.start();
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+
+
+    public void deleteRecording(){
+        File file = new File(context.getFilesDir() + "/audio.mp3");
+        if (file.exists()) {
+            file.delete();
+        }
+    }
+}

app/src/main/java/com/example/ueberwachungssystem/MainActivity.java

@@ -42,22 +42,15 @@ public class MainActivity extends AppCompatActivity {
         File directory = getFilesDir();
 
 
-        VideoDetector vd = new VideoDetector(this);
-        vd.setOnDetectionListener(new Detector.OnDetectionListener() {
-            @Override
-            public void onDetection(@NonNull DetectionReport detectionReport) {
-                Log.d("onDetection", detectionReport.toString());
-            }
-        });
-        vd.startDetection();
-
-
+        AudioRecorder ar = new AudioRecorder(this);
 
 
         //DetectionRecorder detectionRecorder = new DetectionRecorder(this);
         //detectionRecorder.setPreviewView(previewView);
 
         ToggleButton toggleButton = findViewById(R.id.previewButton);
+        ToggleButton toggleButton2 = findViewById(R.id.toggleButton2);
+
         toggleButton.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
@@ -67,18 +60,33 @@ public class MainActivity extends AppCompatActivity {
 
                 if (isRecordVideoAllowed() && toggleButton.isChecked())
                 {
+                    ar.startRecording();
                     //vd.startRecording();
-                    vd.playVideo(videoView);
+                    //vd.playVideo(videoView);
                     //detectionRecorder.playVideo(videoView);
                     //detectionRecorder.start();
                 }
                 else {
+                    ar.stopRecording();
                     //vd.stopRecording();
 
                     //detectionRecorder.stop();
                 }
             }
         });
+
+        toggleButton2.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                if (toggleButton.isChecked())
+                {
+                    ar.playAudio();
+                }
+                else {
+                    ar.deleteRecording();
+                }
+            }
+        });
     }
 
     private boolean isRecordVideoAllowed() {

app/src/main/res/layout/activity_main.xml

@@ -28,6 +28,12 @@
         android:text="ToggleButton" />
 
 
+    <ToggleButton
+        android:id="@+id/toggleButton2"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="ToggleButton" />
+
     <androidx.camera.view.PreviewView
         android:id="@+id/previewView"
         android:layout_width="match_parent"