bug: android:background属性值为selector文件时报错

[AweiLoveAndroid]

代码：

<ImageButton
            android:id="@+id/left_image2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@drawable/selector_test"
            android:layout_toRightOf="@id/left_textview"
            android:layout_centerVertical="true"
            android:layout_marginLeft="10dp" />

生成的内容：

ImageButton imageButton4 = new ImageButton(ctx);
        RelativeLayout.LayoutParams layoutParam4 = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,ViewGroup.LayoutParams.WRAP_CONTENT);
        imageButton4.setId(R.id.left_image2);
        imageButton4.setBackgroundResource(R.drawable.selector_test);
        layoutParam4.addRule(RelativeLayout.RIGHT_OF,R.id.left_textview);
        layoutParam4.addRule(RelativeLayout.CENTER_VERTICAL,RelativeLayout.TRUE);
        layoutParam4.leftMargin= (int)(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,10,res.getDisplayMetrics())) ;
        imageButton4.setLayoutParams(layoutParam4);
        relativeLayout1.addView(imageButton4);

这里 imageButton4.setBackgroundResource(R.drawable.selector_test); 把seulector资源刚在普通的图片资源了，这是不对的。

建议修复bug。