Android-以编程方式为LinearLayout设置Layout_Gravity

做这样的事情：

   LayoutParams lp = new LayoutParams();   lp.gravity= Gravity.CENTER_HORIZONTAL;    myImg.setLayoutParams(lp);

更新： 另一种方法：

LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(     LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); params.weight = 1.0f; params.gravity = Gravity.CENTER; imageView.setLayoutParams(params);