//所有代码的目的就是获取屏幕的高宽
//然后设置图片的高宽
DisplayMetrics dm = new DisplayMetrics();
((Activity)mContext).getWindowManager().getDefaultDisplay().getMetrics(dm);
int screenWidth = dm.widthPixels;
int screenHeight = dm.heightPixels;
ViewGroup.LayoutParams params = hodler.bigImage.getLayoutParams();
params.height=screenWidth/2;
params.width =screenHeight/2;
hodler.bigImage.setLayoutParams(params);
//然后设置图片的高宽
DisplayMetrics dm = new DisplayMetrics();
((Activity)mContext).getWindowManager().getDefaultDisplay().getMetrics(dm);
int screenWidth = dm.widthPixels;
int screenHeight = dm.heightPixels;
ViewGroup.LayoutParams params = hodler.bigImage.getLayoutParams();
params.height=screenWidth/2;
params.width =screenHeight/2;
hodler.bigImage.setLayoutParams(params);