Android编程设置LayoutParams

         RelativeLayout.LayoutParams linearParams = (RelativeLayout.LayoutParams)viewHolder.headerWraper.getLayoutParams();
         RelativeLayout.LayoutParams textParams = (RelativeLayout.LayoutParams)viewHolder.textWrapper.getLayoutParams();

         linearParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT, 0); //清空alignParentRight参数
         textParams.addRule(RelativeLayout.ALIGN_LEFT, 0);           //清空toLeftOf参数

         if (fromToType == Constants.FromToType.FromToTypeFromThisUser.getValue()) { //根据条件设置Layout参数

             linearParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
             textParams.addRule(RelativeLayout.LEFT_OF, R.id.header_wrapper);

             viewHolder.headerWraper.setLayoutParams(linearParams);
             viewHolder.textWrapper.setLayoutParams(textParams);

             Logger.d(TAG, "from this user");
         }
         else{
             Logger.d(TAG, "from otehr user");

             linearParams.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
             textParams.addRule(RelativeLayout.RIGHT_OF , R.id.header_wrapper);

             viewHolder.headerWraper.setLayoutParams(linearParams);
             viewHolder.textWrapper.setLayoutParams(textParams);

             viewHolder.textWrapper.setBackgroundResource(R.drawable.chat_other);
         }