title: Android imagebutton how to change icon size
body: <p>I have been working on interfaces lately and I have many problems with imagebutton sizes. I'm very bad at designing stuff and I'm having major problems with the Android Icons. Thus, I have some questions regarding those.</p>
  
  <p>First of all this is my current layout:</p>
  
  <p><img src="https://i.stack.imgur.com/bT3HP.png" alt="enter image description here"></p>
  
  <p>As you can see, I have two icons that have different sizes and that's not good. I can't seem to force them to take the same size.</p>
  
  <p>My questions are:</p>
  
  <p>1 - How do I force them to take the same size?</p>
  
  <p>2 - What are the recommended size differences for hdpi, ldpi,mdpi and xhdpi?</p>
  
  <p>3 - Why, if I set the imageButton background color to the same color as the layout background, the Icon is moved as if there was no button in the background?</p>
  
  <p>Example: <img src="https://i.stack.imgur.com/GDfXm.png" alt="enter image description here"></p>
  
  <p>Thanks in advance!!</p>