custom color by typedArray

```
<color name="circle">#aa738ffe</color>
<color name="dialog_bg">#f5f5f5</color>
<color name="rect">#aae84e40</color>
<color name="shadow">#25808080</color>
<color name="triangle">#aa72d572</color>
<color name="view_bg">#00000000</color>
```

and custom size plz...it's too small now...
