Question

如何让popupwindow 显示在整个屏幕的中央

Answer 1

这个简单又好用
AlertDialog.Builder builderAlert = new AlertDialog.Builder(this);
builderAlert.setTitle("更换头像");
myview = View.inflate(UserActivity.this,
R.layout.choose_photo_buttom, null);
builderAlert.setView(myview);
dialog = builderAlert.show();
//默认在中间，下面3行是从底部弹出的动画，
/* Window window = dialog.getWindow();
window.setGravity(Gravity.BOTTOM);
window.setWindowAnimations(R.style.mystyle); // 添加动画
*/ dialog.show();

Answer 2

调用显示的时候用showAtLocation，然后第二个参数选择Gravity.center，第三个第四个写0，就可以居中了