Button stay pressed
===

this is an easy question,

in my xml file i have this button :

    <Button
    android:id="@+id/button_8"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:text="@string/Bf"
    android:background="@drawable/button_purple" 
    android:layout_weight="1"
    android:textColor="#ffffff"
    android:onClick="action"		    
    />

And in my activity i have this method for the button :

    public void action (View v)
    {
    	s = "m";
    	changeCouleur("blue");
    	v.setPressed(true);
    }

When i pressed the button it's working but the button don't stay pressed.

I don't use an image this is what i use for the color :

    <selector xmlns:android="http://schemas.android.com/apk/res/android">
        <item android:state_pressed="true" >
            <shape>
                <solid
                    android:color="#449def" />
                <stroke
                    android:width="1dp"
                    android:color="#2f6699" />
                <corners
                    android:radius="3dp" />
                <padding
                    android:left="10dp"
                    android:top="10dp"
                    android:right="10dp"
                    android:bottom="10dp" />
            </shape>
        </item>
        <item android:state_focused="true" >
            <shape>
                <solid
                    android:color="#449def" />
                <stroke
                    android:width="1dp"
                    android:color="#2f6699" />
                <corners
                    android:radius="3dp" />
                <padding
                    android:left="10dp"
                    android:top="10dp"
                    android:right="10dp"
                    android:bottom="10dp" />
            </shape>
        </item>
        <item>
            <shape>
                <gradient
                    android:startColor="#449def"
                    android:endColor="#2f6699"
                    android:angle="270" />
                <stroke
                    android:width="1dp"
                    android:color="#2f6699" />
                <corners
                    android:radius="4dp" />
                <padding
                    android:left="10dp"
                    android:top="10dp"
                    android:right="10dp"
                    android:bottom="10dp" />
            </shape>
        </item>
    </selector>

I tried toggle button but that doesn't fit with what i trying to do.
Thanks in advance if you noticed something wrong.
