TextureView anstatt SurfaceView

Fehlerbehebung in Zeile 61: if (requestCode == REQUEST_PERMISSION) {
davor: if (requestCode == REQUEST_PERMISSIONS) {

app/src/main/AndroidManifest.xml

@@ -2,6 +2,13 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.example.greenwatch">
 
+    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.READ_MEDIA_AUDIO" />
+    <uses-permission android:name="android.permission.READ_MEDIA_VIDEO" />
+    <uses-permission android:name="android.permission.RECORD_AUDIO" />
+    <uses-permission android:name="android.permission.CAMERA" />
+
     <application
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"
@@ -9,9 +16,6 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/Theme.GreenWatch">
-        <activity
-            android:name=".Beschleunigungssensor"
-            android:exported="false" />
         <activity
             android:name=".MainActivity"
             android:exported="true">

app/src/main/java/com/example/greenwatch/AlarmRecorder.java

@@ -0,0 +1,225 @@
+package com.example.greenwatch;
+
+import android.graphics.SurfaceTexture;
+import android.media.MediaCodec;
+import android.media.MediaExtractor;
+import android.media.MediaFormat;
+import android.media.MediaMuxer;
+import android.media.MediaRecorder;
+import android.os.Environment;
+import android.view.Surface;
+import android.view.SurfaceHolder;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+
+public class AlarmRecorder {
+    private String videoPath;
+    private String audioPath;
+    private MediaFormat videoFormat;
+    private MediaFormat audioFormat;
+    private MediaExtractor videoExtractor;
+    private MediaExtractor audioExtractor;
+    private Runnable audioRecorderRunnable;
+    private Runnable videoRecorderRunnable;
+    private MediaRecorder videoRecorder;
+    private MediaRecorder audioRecorder;
+    //private SurfaceHolder previewHolder;
+    private Surface surface;
+    private Thread videoThread; // Video-Thread als Instanzvariable
+    private Thread audioThread; // Audio-Thread als Instanzvariable
+
+    public AlarmRecorder(SurfaceTexture surfaceTexture) {
+        audioRecorder = new MediaRecorder();
+        videoRecorder = new MediaRecorder();
+        videoExtractor = new MediaExtractor();
+        audioExtractor = new MediaExtractor();
+        this.surface = new Surface(surfaceTexture);
+    }
+
+    public void startRecording() {
+        createStoragePaths(); //Speicherort und -namen für Audio- und Video-Datei
+
+        audioRecorderRunnable = new AudioRecorder(audioRecorder, audioPath);
+        videoRecorderRunnable = new VideoRecorder(videoRecorder, videoPath, surface);
+        audioThread = new Thread(audioRecorderRunnable);
+        videoThread = new Thread(videoRecorderRunnable);
+
+        //Threads starten
+        videoThread.start();
+        audioThread.start();
+    }
+
+    public void stopRecording() {
+        try {
+            stopVideoRecording();
+            stopAudioRecording();
+
+            waitTillThreadsStopped();
+            File videoFile = new File(videoPath); //Speichere das aufgenommene Video
+            File audioFile = new File(audioPath); //Speichere die aufgenommene Audio
+
+            if (videoFile.exists() && audioFile.exists()) {
+                //Wenn Video- und Audioaufzeichnung gestoppt und abgespeichert sind, beginne mit dem Mergeprozess der beiden
+                mergeVideoWithAudio();
+            }
+        } catch (RuntimeException stopException) {
+            stopException.printStackTrace();
+        }
+    }
+
+    private void createStoragePaths(){
+        //Pfade zum Zwischenspeichern der aufgenommenen Audio und Video-Datei
+        String externalStorageDirectory = Environment.getExternalStorageDirectory().getAbsolutePath();
+        String dcimDirectory = externalStorageDirectory + "/DCIM";
+        videoPath = dcimDirectory + "/video.mp4";
+        audioPath = dcimDirectory + "/audio.mp3";
+    }
+
+    private void stopVideoRecording(){
+        if (videoRecorder != null) {
+            videoRecorder.stop();
+            videoRecorder.release();
+            videoRecorder = null;
+        }
+    }
+
+    private void stopAudioRecording(){
+        if (audioRecorder != null) {
+            audioRecorder.stop();
+            audioRecorder.release();
+            audioRecorder = null;
+        }
+    }
+
+    private void waitTillThreadsStopped(){
+        try {
+            videoThread.join();
+            audioThread.join();
+        } catch (InterruptedException e) {
+            e.printStackTrace();
+        }
+    }
+
+    private void mergeVideoWithAudio() {
+        try {
+            setVideoExtractorDataSource(); //extrahieren der Video Datei, die zuvor zwischengespeichert wurde
+            setAudioExtractorDataSource(); //extrahieren der Audio Datei, die zuvor zwischengespeichert wurde
+
+            //Speicherort der später zusammengeführten Datei
+            String outputFilePath = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MOVIES).getAbsolutePath() + "/merged_video.mp4";
+            //MediaMuxer zum Zusammenführen einer Audio- und einer Videodatei
+            MediaMuxer muxer = new MediaMuxer(outputFilePath, MediaMuxer.OutputFormat.MUXER_OUTPUT_MPEG_4);
+            int videoTrack = muxer.addTrack(videoFormat);
+            int audioTrack = muxer.addTrack(audioFormat);
+            muxer.start();
+
+            ByteBuffer buffer = ByteBuffer.allocate(1024 * 1024);
+            MediaCodec.BufferInfo bufferInfo = new MediaCodec.BufferInfo();
+
+            videoExtraction(buffer, videoTrack, bufferInfo, muxer);
+            audioExtraction(buffer, audioTrack, bufferInfo, muxer);
+
+            muxer.stop();
+            muxer.release();
+
+            // Löschen der separaten Video- und Audio-Dateien
+            deleteVideoFile();
+            deleteAudioFile();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+    private void setVideoExtractorDataSource() {
+        try {
+            videoExtractor.setDataSource(videoPath);
+            int videoTrackIndex = getTrackIndex(videoExtractor, "video/");
+            if (videoTrackIndex < 0) {
+                // Video-Track nicht gefunden
+                return;
+            }
+            videoExtractor.selectTrack(videoTrackIndex);
+            videoFormat = videoExtractor.getTrackFormat(videoTrackIndex);
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    private void setAudioExtractorDataSource() {
+        try {
+            audioExtractor.setDataSource(audioPath);
+            int audioTrackIndex = getTrackIndex(audioExtractor, "audio/");
+            if (audioTrackIndex < 0) {
+                // Audio-Track nicht gefunden
+                return;
+            }
+            audioExtractor.selectTrack(audioTrackIndex);
+            audioFormat = audioExtractor.getTrackFormat(audioTrackIndex);
+
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    private int getTrackIndex(MediaExtractor extractor, String mimeType) {
+        int trackCount = extractor.getTrackCount();
+        for (int i = 0; i < trackCount; i++) {
+            MediaFormat format = extractor.getTrackFormat(i);
+            String trackMimeType = format.getString(MediaFormat.KEY_MIME);
+            if (trackMimeType.startsWith(mimeType)) {
+                return i;
+            }
+        }
+        return -1;
+    }
+
+    private void videoExtraction(ByteBuffer buffer, int videoTrack, MediaCodec.BufferInfo bufferInfo, MediaMuxer muxer) {
+        videoExtractor.seekTo(0, MediaExtractor.SEEK_TO_CLOSEST_SYNC);
+        while (true) {
+            int sampleSize = videoExtractor.readSampleData(buffer, 0);
+            if (sampleSize < 0) {
+                break;
+            }
+            long presentationTimeUs = videoExtractor.getSampleTime();
+            bufferInfo.offset = 0;
+            bufferInfo.size = sampleSize;
+            bufferInfo.flags = MediaCodec.BUFFER_FLAG_KEY_FRAME;
+            bufferInfo.presentationTimeUs = presentationTimeUs;
+            muxer.writeSampleData(videoTrack, buffer, bufferInfo);
+            videoExtractor.advance();
+        }
+    }
+
+    private void audioExtraction(ByteBuffer buffer, int audioTrack, MediaCodec.BufferInfo bufferInfo, MediaMuxer muxer) {
+        audioExtractor.seekTo(0, MediaExtractor.SEEK_TO_CLOSEST_SYNC);
+        while (true) {
+            int sampleSize = audioExtractor.readSampleData(buffer, 0);
+            if (sampleSize < 0) {
+                break;
+            }
+            long presentationTimeUs = audioExtractor.getSampleTime();
+            bufferInfo.offset = 0;
+            bufferInfo.size = sampleSize;
+            bufferInfo.flags = 0; // or MediaCodec.BUFFER_FLAG_KEY_FRAME
+            bufferInfo.presentationTimeUs = presentationTimeUs;
+            muxer.writeSampleData(audioTrack, buffer, bufferInfo);
+            audioExtractor.advance();
+        }
+    }
+
+    private void deleteVideoFile(){
+        File videoFile = new File(videoPath);
+        if (videoFile.exists()) {
+            videoFile.delete();
+        }
+    }
+
+    private void deleteAudioFile(){
+        File audioFile = new File(audioPath);
+        if (audioFile.exists()) {
+            audioFile.delete();
+        }
+    }
+}

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

@@ -0,0 +1,30 @@
+package com.example.greenwatch;
+
+import android.media.MediaRecorder;
+
+import java.io.IOException;
+
+public class AudioRecorder implements Runnable {
+
+    private final MediaRecorder audioRecorder;
+    private final String audioPath;
+    public AudioRecorder(MediaRecorder audioRecorder, String audioPath) {
+        this.audioRecorder = audioRecorder;
+        this.audioPath = audioPath;
+    }
+    @Override
+    public void run() {
+        audioRecorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT);
+        audioRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
+        audioRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
+        audioRecorder.setOutputFile(audioPath);
+
+        try {
+            audioRecorder.prepare();
+            audioRecorder.start();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+}

app/src/main/java/com/example/greenwatch/Beschleunigungssensor.java

@@ -1,188 +0,0 @@
-package com.example.greenwatch;
-
-
-import androidx.appcompat.app.AppCompatActivity;
-
-import android.content.Context;
-import android.content.SharedPreferences;
-import android.hardware.Sensor;
-import android.hardware.SensorEvent;
-import android.hardware.SensorEventListener;
-import android.hardware.SensorManager;
-import android.os.Bundle;
-import android.widget.TextView;
-
-import java.text.SimpleDateFormat;
-import java.util.ArrayList;
-import java.util.Date;
-
-public class Beschleunigungssensor extends AppCompatActivity implements SensorEventListener{
-
-    private SensorManager bsmanager;
-    private ArrayList<Float> Gesamt_be;
-    private int sensorType = Sensor.TYPE_GYROSCOPE, zaehler_runde =0, listen_groesse = 500, kalibrieren, Offset_shared = 0, shared_merk, mittelwertsumme_shared;
-    private Sensor sens, sensor_l;
-    private float x_value = 0, y_value, z_value, Vorbesetzung = 0, gesamt_runde =0;
-    private double Schwellwert = 0.15, mittelwertsumme = 0.0, Offset = 0.1;
-    String Daten, Warnung, Zeitstempel, Array_shared;
-    private final static String KEY_kalibirieren = "KEY_KALIBRIEREN_"+Beschleunigungssensor.class.getSimpleName();
-    private final static String KEY_Gesamt_be = "KEY_GESAMT_BE_"+Beschleunigungssensor.class.getSimpleName();
-    private final static String KEY_Offset = "KEY_OFFSET_"+Beschleunigungssensor.class.getSimpleName();
-    private final static String KEY_Mittelwertsumme = "KEY_MITTELWERTSUMME_"+Beschleunigungssensor.class.getSimpleName();
-    TextView Daten_Bsensor, Warnung_Bsensor, test;
-    private boolean toggle = true, ts_setzen = true, start_messen;
-
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_beschleunigungssensor);
-
-        Daten_Bsensor = (TextView) findViewById(R.id.DatenBsensor);
-        Warnung_Bsensor = (TextView) findViewById(R.id.WarnungBsensor);
-        test = (TextView) findViewById(R.id.test);
-
-        bsmanager = (SensorManager) getSystemService(SENSOR_SERVICE);
-        if (bsmanager.getSensorList(Sensor.TYPE_GYROSCOPE).size() == 0) {
-            sens = null;
-            Daten = "kein B Sensor voranden";
-        } else {
-            sens = bsmanager.getSensorList(sensorType).get(0);
-        }
-        Gesamt_be = new ArrayList<Float>();
-        for (int i = 0; i < listen_groesse ; i++){
-            Gesamt_be.add(Vorbesetzung);
-        }
-        kalibrieren = 0;
-        start_messen = false;
-    }
-
-    public static String getTimestamp(){
-        Long tslong = System.currentTimeMillis();
-        SimpleDateFormat sdf = new SimpleDateFormat("HH:mm:ss");
-        Date date = new Date(tslong);
-        String result = sdf.format(date);
-
-        return result;
-    }
-
-    @Override
-    public void onSensorChanged(SensorEvent event) {
-        StringBuilder sb = new StringBuilder();
-        sb.append("x=").append(event.values[0])//.append(event.timestamp)
-                .append("\ny=").append(event.values[1])
-                .append("\nz=").append(event.values[2]);
-        Daten = sb.toString();
-        Daten_Bsensor.setText(Daten);
-        gesamt_runde = event.values[0] + event.values[1] + event.values[2];
-        Gesamt_be.remove(zaehler_runde);
-        Gesamt_be.add(zaehler_runde, gesamt_runde);
-        mittelwertsumme = 0.0;
-
-        //Mittelwert des Arrays berechnen
-        for (int i = 0; i < listen_groesse; i++){
-            if (Gesamt_be.get(i) < 0){
-                mittelwertsumme += (Gesamt_be.get(i) * (-1));
-            }else {
-                mittelwertsumme += Gesamt_be.get(i);
-            }
-        }
-        mittelwertsumme = mittelwertsumme/listen_groesse;
-        if (kalibrieren < listen_groesse){
-            Offset = mittelwertsumme;
-            kalibrieren++;
-        }else {
-            start_messen = true;
-        }
-        StringBuilder testsb = new StringBuilder();
-        testsb.append(mittelwertsumme);
-        String tests = testsb.toString();
-        test.setText(tests);
-
-        if((mittelwertsumme > (Schwellwert+Offset) ) & (ts_setzen == true) &(start_messen == true)){
-            Zeitstempel = getTimestamp();
-            StringBuilder ts = new StringBuilder();
-            ts.append(Zeitstempel)
-                    .append(", Gruppe3")
-                    .append(", An")
-                    .append(", Bewegung, ")
-                    .append(mittelwertsumme);
-            Warnung = ts.toString();
-            Warnung_Bsensor.setText(Warnung);
-            ts_setzen = false;
-        }else if((mittelwertsumme > (Schwellwert+Offset)) & (ts_setzen == false)){
-        } else if ((mittelwertsumme < (Schwellwert+Offset)) & (ts_setzen == false)) {
-            Warnung_Bsensor.setText("");
-            ts_setzen = true;
-        }
-
-        if (zaehler_runde < (listen_groesse -1)){
-            zaehler_runde++;
-        }else {
-            zaehler_runde = 0;
-        }
-    }
-    //mittelwertsumme ist kein int in diesem programm
-    //shared prefenrences: bei Kippen speichern -> nochmal neu klalibrieren? -> eig ja, weil neuer Standort
-    //Vorbelegung nicht nochmal neu vornehmen -> aus onCreate Funktion raus -> hilfsvariablen auch in shared preferences speichern
-    @Override
-    public void onAccuracyChanged(Sensor sensor, int accuracy) {}
-
-    @Override
-    protected void onResume() {
-        super.onResume();
-        if (sens != null) {
-            if (bsmanager.registerListener(this, sens, SensorManager.SENSOR_DELAY_GAME)) {
-                Daten = "Wir haben uns beim Sensor angemeldet";
-            } else {
-                Daten = "Das anmelden hat nicht geklappt";
-            }
-        }
-        //SharedPreferences p = getPreferences(Context.MODE_PRIVATE);
-        //mittelwertsumme_shared = p.getInt(KEY_Mittelwertsumme, 0);
-        //kalibrieren = p.getInt(KEY_kalibirieren, 0);
-        //Offset_shared = p.getInt(KEY_Offset, 0 );
-        //Array_shared = p.getString(KEY_Gesamt_be, "");
-
-        //mittelwertsumme = (double) mittelwertsumme_shared;
-        //mittelwertsumme /= 1000000.0;
-
-        //Offset = (double) Offset_shared;
-        //Offset /= 1000000.0;
-
-        //String zw[] = Array_shared.split(";", listen_groesse);
-
-        //if(shared_merk == 2){
-        //for (int i=0; i<listen_groesse; i++){
-        //float wert = Float.valueOf(zw[i]);
-        //Gesamt_be.add(i, wert);
-        //}}
-
-        }
-
-
-        @Override
-        protected void onPause () {
-            super.onPause();
-            if (sens != null) {
-                bsmanager.unregisterListener(this, sens);
-            }
-            //shared_merk = 2;
-            // Offset_shared = (int) (Offset * 1000000.0);
-            //mittelwertsumme_shared = (int) (mittelwertsumme * 1000000.0);
-
-            //StringBuilder ar = new StringBuilder();
-            //for (int z=0; z < listen_groesse; z++){
-            //ar.append(Gesamt_be.get(z)).append(";");
-            //}
-            //Array_shared = ar.toString();
-
-            //SharedPreferences p = getPreferences(Context.MODE_PRIVATE);
-            //SharedPreferences.Editor editor = p.edit();
-            //editor.putInt(KEY_Mittelwertsumme, mittelwertsumme_shared);
-            //editor.putInt(KEY_kalibirieren, kalibrieren);
-            //editor.putInt(KEY_Offset, Offset_shared);
-            //editor.putString(KEY_Gesamt_be, Array_shared);
-            //editor.commit();
-        }
-    }

app/src/main/java/com/example/greenwatch/Kamera.java

@@ -1,4 +0,0 @@
-package com.example.greenwatch;
-
-public class Kamera {
-}

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

@@ -1,41 +1,101 @@
 package com.example.greenwatch;
 
-import androidx.appcompat.app.AppCompatActivity;
+import android.Manifest;
-
+import android.content.pm.PackageManager;
-
+import android.graphics.SurfaceTexture;
-import android.content.Intent;
 import android.os.Bundle;
+import android.view.TextureView;
 import android.view.View;
 import android.widget.Button;
+import android.widget.Toast;
 
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.core.app.ActivityCompat;
+import androidx.core.content.ContextCompat;
 
-public class MainActivity extends AppCompatActivity {
+public class MainActivity extends AppCompatActivity implements TextureView.SurfaceTextureListener{
 
-    private Button Beschleunigungssensor;
+    private boolean isRecording = false;
+    private static final int REQUEST_PERMISSION = 200;
+    private Button button;
+    private TextureView textureView;
+    private AlarmRecorder alarmRecorder;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
 
-        final Button Beschleunigungssensor = (Button) findViewById(R.id.beschleunigungssensor);
+        button = findViewById(R.id.button);
-        Beschleunigungssensor.setOnClickListener(new View.OnClickListener() {
+        textureView = findViewById(R.id.textureView);
+        textureView.setSurfaceTextureListener(this);
+
+        button.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
-                Intent intent = new Intent(MainActivity.this, Beschleunigungssensor.class);
+                if (!isRecording) {
-                startActivity(intent);
+                    if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.CAMERA)
+                            != PackageManager.PERMISSION_GRANTED
+                            || ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE)
+                            != PackageManager.PERMISSION_GRANTED
+                            || ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.RECORD_AUDIO)
+                            != PackageManager.PERMISSION_GRANTED) {
+                        ActivityCompat.requestPermissions(MainActivity.this,
+                                new String[]{Manifest.permission.CAMERA, Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.RECORD_AUDIO},
+                                REQUEST_PERMISSION);
+                    } else {
+                        isRecording = true;
+                        alarmRecorder.startRecording();
+                    }
+                } else {
+                    isRecording = false;
+                    alarmRecorder.stopRecording();
+                }
             }
         });
     }
 
     @Override
-    protected void onResume() {
+    public void onSurfaceTextureAvailable(SurfaceTexture surfaceTexture, int width, int height) {
-        super.onResume();
+        alarmRecorder = new AlarmRecorder(surfaceTexture);
     }
 
-
     @Override
-    protected void onPause() {
+    public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) {
-        super.onPause();
+        // Die Größe der SurfaceTexture hat sich geändert
+        // Hier können entsprechende Anpassungen vorgenommen werden
+    }
+
+    @Override
+    public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
+        // SurfaceTexture wurde zerstört
+        // Hier können entsprechende Bereinigungen durchgeführt werden
+        return true;
+    }
+
+    @Override
+    public void onSurfaceTextureUpdated(SurfaceTexture surface) {
+        // SurfaceTexture wurde aktualisiert
+        // Hier können entsprechende Aktionen ausgeführt werden, wenn gewünscht
+    }
+
+    private SurfaceTexture getSurfaceTexture() {
+        return textureView.getSurfaceTexture();
+    }
+
+    @Override
+    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
+        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
+        if (requestCode == REQUEST_PERMISSION) {
+            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
+                // Berechtigungen wurden gewährt
+                Toast.makeText(this, "Berechtigungen gewährt", Toast.LENGTH_SHORT).show();
+                isRecording = true;
+                alarmRecorder.startRecording();
+            } else {
+                // Berechtigungen wurden nicht gewährt
+                Toast.makeText(this, "Berechtigungen nicht gewährt", Toast.LENGTH_SHORT).show();
+            }
+        }
     }
 }

app/src/main/java/com/example/greenwatch/Mikrofon.java

@@ -1,4 +0,0 @@
-package com.example.greenwatch;
-
-public class Mikrofon {
-}

app/src/main/java/com/example/greenwatch/VideoRecorder.java

@@ -0,0 +1,39 @@
+package com.example.greenwatch;
+
+import android.media.MediaRecorder;
+import android.view.Surface;
+import android.view.SurfaceHolder;
+
+import java.io.IOException;
+
+public class VideoRecorder implements Runnable{
+    private final MediaRecorder videoRecorder;
+    private final String videoPath;
+    //private SurfaceHolder previewHolder;
+    private Surface surface;
+
+
+    public VideoRecorder(MediaRecorder videoRecorder, String videoPath, Surface surface) {
+        this.videoRecorder = videoRecorder;
+        this.videoPath = videoPath;
+        this.surface = surface;
+    }
+    @Override
+    public void run() {
+        videoRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
+        videoRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
+        videoRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.DEFAULT);
+        videoRecorder.setOutputFile(videoPath);
+        videoRecorder.setOrientationHint(90);
+        videoRecorder.setPreviewDisplay(surface);
+
+        try {
+            videoRecorder.prepare();
+            videoRecorder.start();
+
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+}
+

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

@@ -1,32 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
-    xmlns:tools="http://schemas.android.com/tools"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    tools:context=".Beschleunigungssensor">
-
-    <LinearLayout
-        android:layout_width="match_parent"
-        android:layout_height="match_parent"
-        android:orientation="vertical">
-
-        <TextView
-            android:id="@+id/DatenBsensor"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:text="" />
-
-        <TextView
-            android:id="@+id/WarnungBsensor"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:text="" />
-
-        <TextView
-            android:id="@+id/test"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:text="" />
-    </LinearLayout>
-</androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -6,42 +6,26 @@
     android:layout_height="match_parent"
     tools:context=".MainActivity">
 
-    <LinearLayout
+    <TextureView
-        android:layout_width="match_parent"
+        android:id="@+id/textureView"
-        android:layout_height="match_parent"
+        android:layout_width="1sp"
-        android:orientation="vertical">
+        android:layout_height="1sp"
+        android:visibility="visible"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="1.0"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/button"
+        app:layout_constraintVertical_bias="0.0" />
 
-        <TextView
+    <Button
-            android:id="@+id/textView"
+        android:id="@+id/button"
-            android:layout_width="wrap_content"
+        android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
+        android:layout_height="wrap_content"
-            android:text="TextView"
+        android:layout_marginEnd="339dp"
-            tools:layout_editor_absoluteX="171dp"
+        android:text="Record Video"
-            tools:layout_editor_absoluteY="186dp" />
+        app:layout_constraintHorizontal_bias="0.5"
-
+        app:layout_constraintStart_toStartOf="parent"
-        <TextView
+        app:layout_constraintTop_toTopOf="parent"/>
-            android:id="@+id/textView2"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:text="TextView" />
-
-        <Button
-            android:id="@+id/beschleunigungssensor"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:text="Beschleunigungssensor" />
-
-        <Button
-            android:id="@+id/aufnahme"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:text="Aufnahme Start" />
-
-        <Button
-            android:id="@+id/wiedergabe"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:text="Wiedergabe" />
-    </LinearLayout>
 
 </androidx.constraintlayout.widget.ConstraintLayout>