Mikrofon als Activity

app/src/main/AndroidManifest.xml

 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.example.greenwatch">
 
+    <uses-permission android:name="android.permission.RECORD_AUDIO" />
     <application
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"

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

 
 import androidx.appcompat.app.AppCompatActivity;
 
+import android.content.Intent;
 import android.os.Bundle;
+import android.view.View;
+import android.widget.Button;
 
 public class MainActivity extends AppCompatActivity {
 
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
+
+        ((Button)findViewById(R.id.buttonstartmicdetection)).setOnClickListener(new View.OnClickListener(){
+            @Override
+            public void onClick(View view) {
+                Intent i = new Intent(MainActivity.this, Mikrofon.class);
+                startActivity(i);
+            }
+        });
     }
 }

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

-package com.example.greenwatch;
-
-public class Mikrofon {
-}

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

     android:layout_height="match_parent"
     tools:context=".MainActivity">
 
-    <TextView
+    <Button
+        android:id="@+id/buttonstartmicdetection"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:text="Hello World!"
+        android:text="Starte Mikrofon Detection"
         app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintLeft_toLeftOf="parent"
-        app:layout_constraintRight_toRightOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent" />
-
 </androidx.constraintlayout.widget.ConstraintLayout>