Apps images are blurry on Tablets

[maddie_jones]

I have developed an app with images, however, the images look blurry when I run the application from a tablet. The tablet size is 10.1.

When I run the application on mobile devices it works like charm, can you please advice why the pictures look blurry on the tablet. I have created drawable folders

for each of the different screen sizes which has also not fixed the problem. Please can you help or advice?.

My Drawable folder structure and sizes

- drawable-hdpi - Width 62 x Height 62  
 - drawable- mdpi - Width 40 x Height 40 
 - drawable- xhdpi - Width 82 x Height 82 
 - drawable - xxhdpi - Width 123 x Height 123 
 - drawable- xxxhdpi - Width 164 x Height 164

  <ImageButton
            android:layout_width="150dp"
            android:layout_height="100dp"
            android:id="@+id/placesbtn"
            android:src="@drawable/ic_place"
            android:background="#00000000"
            android:layout_marginLeft="83dp"
            android:layout_marginStart="83dp"
            android:layout_below="@+id/flipper1"
            android:layout_alignParentLeft="true"
            android:layout_alignParentStart="true"
            android:contentDescription="Places"
            android:focusable="true"  />
   
        <ImageButton
            android:layout_width="150dp"
            android:layout_height="100dp"
            android:id="@+id/transportbtn"
            android:src="@drawable/ic_travels"
            android:background="#00000000"
            android:layout_alignTop="@+id/placesbtn"
            android:layout_toRightOf="@+id/placesbtn"
            android:layout_toEndOf="@+id/placesbtn"
            android:focusable="true"
            android:contentDescription="Travel" />
   
        <ImageButton
            android:layout_width="150dp"
            android:layout_height="100dp"
            android:id="@+id/directionbtn"
            android:src="@drawable/ic_direction"
            android:background="#00000000"
            android:layout_alignParentBottom="true"
            android:layout_alignLeft="@+id/placesbtn"
            android:layout_alignStart="@+id/placesbtn"
            android:focusable="true"
            android:contentDescription="Direction"  />
   
        <ImageButton
            android:layout_width="150dp"
            android:layout_height="100dp"
            android:id="@+id/gallerybtn"
            android:src="@drawable/ic_gallerys"
            android:background="#00000000"
            android:layout_alignTop="@+id/directionbtn"
            android:layout_toRightOf="@+id/directionbtn"
            android:layout_toEndOf="@+id/directionbtn"
            android:focusable="true"
            android:contentDescription="Gallery" />
   
    </RelativeLayout>

Please advice how I can make the above image buttons for suitable for tablet screen sizes.