barva | An audio visualizer that pulses the background | Audio Utils library

Note: You don't need to post options.html and options.js.

Here is the problem ...

you forgot break statements in your switch

I think you can try onClickListener public View.OnClickListener mClickListener = new View.OnClickListener() public void onClick(View v) } };

you can add first h2 in one div and add css as per this div like this .heading h2{background-color: orange;}

You didn't initialize text views...

TVr = findViewById(R.id.TVr); - do it for all 3 TextViews TVr, TVg, TVb;

Also:

• You have to initialize vysledek.
• You have to cast progress (seekR, seekG, seekB) to String in onProgressChanged() method - TVr.setText(String.valueOf(seekR));
• Your layout is also very poor. You haven't mentioned the orientation android:orientation="horizontal" and the positioning for the LinearLayout as well.

According to the comments, you just trying to center an iframe. The I in iframe stands for inline. So the correct name for the </code> tag is: <code>inline frame</code>. As the name indictaes, it is not a <code>block level element</code> but an <code>inline element</code>. As such it can not be centered by using <code>margin: 0 auto;</code> by default. So you need to add <code>display: block;</code> first, in order to change the <code>iframe</code> into a <code>block level element</code>.</p> <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false"> <div class="snippet-code"> <pre class="snippet-code-css lang-css prettyprint-override"><code>iframe { display: block; margin: 0 auto; background-color: blue; }</code></pre> <pre class="snippet-code-html lang-html prettyprint-override"><code><iframe src="">Just a Test

That is not as easy as it seems. What you essentially want to do is add controls and functionality to an existing control. In order o add the buttons to the tab strip, you have to create a custom control template, because that defines the appearance and visual states of a control. To add functionality to these buttons you would either have to create custom attached properties or create a custom control.

Personally I think that the cleaner way is to create a custom control for this scenario. To make it flexible, we create an area in the tab strip for additional content of any kind and even allow for defining a data template for it.

To start off, create a class that derives from TabControl and add dependendency properties for the content to be displayed and the optional data template for arbitary content.