adapted Layout MainActivity

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

@@ -30,7 +30,6 @@ public class MainActivity extends AppCompatActivity {
     private Button accelerometerButton;
     private Button audiodetectionAndAccelerometerButton;
     private Button videodetectionAndAccelerometerButton;
-    private Button connectionButton;
     private MainActivityViewModel mMainActivityViewModel;
     private Permission permission = new Permission();
 
@@ -50,7 +49,6 @@ public class MainActivity extends AppCompatActivity {
         accelerometerButton = (Button) findViewById(R.id.accelerometerButton);
         audiodetectionAndAccelerometerButton = (Button) findViewById(R.id.audiodetectionAndAccelerometerButton);
         videodetectionAndAccelerometerButton = (Button) findViewById(R.id.videodetectionAndAccelerometerButton);
-        connectionButton = (Button) findViewById(R.id.connectionButton);
 
         RecyclerView deviceListRecyclerView = findViewById(R.id.deviceListRecyclerView);
         deviceListRecyclerView.setLayoutManager(new LinearLayoutManager(this));
@@ -159,12 +157,6 @@ public class MainActivity extends AppCompatActivity {
                 }
             }
         });
-        connectionButton.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View v) {
-                openConnectionActivity();
-            }
-        });
     }
 
     @Override
@@ -198,10 +190,4 @@ public class MainActivity extends AppCompatActivity {
         Intent intent = new Intent(this, VideodetectionAndAccelerometerActivity.class);
         startActivity(intent);
     }
-    public void openConnectionActivity(){
-        //Intent intent = new Intent(this, ConnectionActivity.class);
-        //startActivity(intent);
-        mMainActivityViewModel.updateDevice(mMainActivityViewModel.getLocalDeviceUUID(), "10:51",  false, "Audio", 10);
-    }
-
 }

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

@@ -5,9 +5,10 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:orientation="vertical"
-    android:padding="10dp"
+    android:padding="5dp"
     tools:context=".MainActivity">
 
+
     <androidx.recyclerview.widget.RecyclerView
         android:id="@+id/alarmHistoryListRecyclerView"
         android:layout_width="match_parent"
@@ -23,60 +24,85 @@
         android:layout_weight="3"
         tools:listitem="@layout/device_item">
     </androidx.recyclerview.widget.RecyclerView>
-    
+
     <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:orientation="vertical"
         android:layout_weight="3">
 
-        <Button
-            android:id="@+id/audiodetectionButton"
+        <LinearLayout
             android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:layout_weight="1"
-            android:text="Audiodetection">
-        </Button>
+            android:layout_height="match_parent"
+            android:orientation="horizontal"
+            android:layout_weight="1">
 
-        <Button
-            android:id="@+id/videodetectionButton"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:layout_weight="1"
-            android:text="Videodetection">
-        </Button>
+            <Button
+                android:id="@+id/audiodetectionButton"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginEnd="2dp"
+                android:layout_gravity="center_vertical"
+                android:layout_weight="1"
+                android:text="Audiodetection">
+            </Button>
 
-        <Button
-            android:id="@+id/accelerometerButton"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:layout_weight="1"
-            android:text="Accelerometer">
-        </Button>
+            <Button
+                android:id="@+id/videodetectionButton"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginStart="2dp"
+                android:layout_gravity="center_vertical"
+                android:layout_weight="1"
+                android:text="Videodetection">
+            </Button>
 
-        <Button
-            android:id="@+id/audiodetectionAndAccelerometerButton"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:layout_weight="1"
-            android:text="Audiodetection + Accelerometer">
-        </Button>
+        </LinearLayout>
 
-        <Button
-            android:id="@+id/videodetectionAndAccelerometerButton"
+        <LinearLayout
             android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:layout_weight="1"
-            android:text="Videodetection + Accelerometer">
-        </Button>
+            android:layout_height="match_parent"
+            android:orientation="horizontal"
+            android:layout_weight="1">
 
-        <Button
-            android:id="@+id/connectionButton"
+            <Button
+                android:id="@+id/accelerometerButton"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center_vertical"
+                android:layout_weight="1"
+                android:text="Accelerometer">
+            </Button>
+
+        </LinearLayout>
+
+        <LinearLayout
             android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:layout_weight="1"
-            android:text="Connect to Devices">
-        </Button>
+            android:layout_height="match_parent"
+            android:orientation="horizontal"
+            android:layout_weight="1">
+
+            <Button
+                android:id="@+id/audiodetectionAndAccelerometerButton"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginEnd="2dp"
+                android:layout_gravity="center_vertical"
+                android:layout_weight="1"
+                android:text="Audiodetection + Accelerometer">
+            </Button>
+
+            <Button
+                android:id="@+id/videodetectionAndAccelerometerButton"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginStart="2dp"
+                android:layout_gravity="center_vertical"
+                android:layout_weight="1"
+                android:text="Videodetection + Accelerometer">
+            </Button>
+
+        </LinearLayout>
 
     </LinearLayout>