android 通过代码设置drawableLeft

/**

     * 

     * @desc 设置左边图标

     * @param @param drw

     * @return void

     */

    public void setAlertLeftIcon(Drawable drw){

        drw.setBounds(0, 0, drw.getMinimumWidth(), drw.getMinimumHeight());  

        alertTitle.setCompoundDrawables(drw, null, null, null);

    }