如何在Android应用中实现一个动态searchview搜索栏效果

private void expand() { //设置伸展状态时的布局 tvSearch.setText("搜索简书的内容和朋友"); RelativeLayout.LayoutParams LayoutParams = (RelativeLayout.LayoutParams) mSearchLayout.getLayoutParams(); LayoutParams.width = LayoutParams.MATCH_PARENT; LayoutParams.setMargins(dip2px(10), dip2px(10), dip2px(10), dip2px(10)); mSearchLayout.setLayoutParams(LayoutParams); //设置动画 beginDelayedTransition(mSearchLayout); } private void reduce() { //设置收缩状态时的布局 tvSearch.setText("搜索"); RelativeLayout.LayoutParams LayoutParams = (RelativeLayout.LayoutParams) mSearchLayout.getLayoutParams(); LayoutParams.width = dip2px(80); LayoutParams.setMargins(dip2px(10), dip2px(10), dip2px(10), dip2px(10)); mSearchLayout.setLayoutParams(LayoutParams); //设置动画 beginDelayedTransition(mSearchLayout); } void beginDelayedTransition(ViewGroup view) { mSet = new AutoTransition(); //设置动画持续时间 mSet.setDuration(300); // 开始表演 TransitionManager.beginDelayedTransition(view, mSet); }