Toast can't be used in new runnable?
<p>as the title,i was used toast in runnable but there is an error
my code:</p>

<pre><code>public Runnable backgroud=new Runnable(){

    public void run() {
        // TODO Auto-generated method stub
        try
        {
            while(!Thread.interrupted())
            {
        String msg="this is a test";
        Toast.makeText(this, msg, Toast.LENGTH_SHORT).show();
        Thread.sleep(1000);
            }
        }
        catch(InterruptedException c)
        {
            c.printStackTrace();
        }
    }

};
</code></pre>
