[DesignPattern]Builder设计模式

//显示基本的AlertDialog 
private void showDialog(Context context) {  
        AlertDialog.Builder builder = new AlertDialog.Builder(context);  
        builder.setIcon(R.drawable.icon);  
        builder.set (\" \");  
        builder.setMessage(\"Message\");  
        builder.setPositiveButton(\"Button1\",  
                new DialogInterface. Listener() {  
                    public void  (DialogInterface dialog, int whichButton) {  
                        set (\"点击了对话框上的Button1\");  
                    }  
                });  
        builder.setNeutralButton(\"Button2\",  
                new DialogInterface. Listener() {  
                    public void  (DialogInterface dialog, int whichButton) {  
                        set (\"点击了对话框上的Button2\");  
                    }  
                });  
        builder.setNegativeButton(\"Button3\",  
                new DialogInterface. Listener() {  
                    public void  (DialogInterface dialog, int whichButton) {  
                        set (\"点击了对话框上的Button3\");  
                    }  
                });  
        builder.create().show();  // 构建AlertDialog， 并且显示
    }