My picture can't fill the tab
<p>I develop an app like below,In the mainActivity,when I try to add an image the TAB1,the picuture can't fill full of the tab,it has a border lost.</p>

<p><img src="http://i.stack.imgur.com/0KQeG.jpg" alt="activity picutre"></p>

<p>The yellow part is the TAB1,I need yellow color fill with the TAB1.any help will be appreciated :),thanks</p>

<h2>EDIT:</h2>

<p>I update my key code</p>

<pre><code>public class MainActivity extends TabActivity implements OnTabChangeListener{

    private TabSpec ts1,ts2,ts3;//declare three page
    private TabHost tableHost;

    @override
    public void onCreate(Bundle savedInstanceState){
    super.onCreat(savedInstanceState);
    tableHost=this.getTabHost();
    LayoutInflater.from(this).inflate(R.layou.activity_main,tableHost.getTabContentView());
    ts1=tableHost.newTabSpec("Tabone");
    ts1.setIndicator("TAB1",getResources().getDrawable(R.drawable.read2));
    ts1.setContent(R.id.btn);
    ts2=tableHost.newTabSpec("Tabtwo");
    ts2.setIndicator("TAB2");
    ts2.setContent(R.id.et);
    ts3=tableHost.newTabSpec("Tabthree");
    ts3.setIndicator("TAB3");
    ts3.setContent(R.id.mylayout);
    tableHost.addTab(ts1);
    tableHost.addTab(ts2);
    tableHost.addTab(ts3);
    tableHost.setOntabChangedListener(this);
}
}
</code></pre>
