1. 在PopupWindow中设置setFocusable(true)来使PopupWindow可以获取焦点
2. 在PopupWindow中重写onKeyDown方法，监听返回键事件

示例代码：

PopupWindow popupWindow = new PopupWindow(view, ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT, true); popupWindow.setFocusable(true);

popupWindow.setOnDismissListener(new PopupWindow.OnDismissListener() { @Override public void onDismiss() { // 处理dismiss事件 } });

popupWindow.setContentView(view);

popupWindow.showAtLocation(parentView, Gravity.BOTTOM, 0, 0); popupWindow.setAnimationStyle(R.style.Animation);

@Override public boolean onKeyDown(int keyCode, KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_BACK && popupWindow.isShowing()) { popupWindow.dismiss(); return true; } return super.onKeyDown(keyCode, event); }