直播商城源码，PopupWindow菜单在ListView中显示
private PopupWindow mOperaPopup;
private void showMenuPopup(View anchor)
{
if(mOperaPopup==null)
{
View popupView=View.inflate(mContext,R.layout.popup_opera_subject,null);
mOperaPopup=new PopupWindow(mContext);
mOperaPopup.setBackgroundDrawable(new ColorDrawable(
mContext.getResources().getColor(R.color.transparent)));
mOperaPopup.setContentView(popupView);
mOperaPopup.setFocusable(true);
mOperaPopup.setOutsideTouchable(true);
//ppw消息监听，让整体背景恢复到正常
mOperaPopup.setOnDismissListener(new PopupWindow.OnDismissListener() {
@Override
public void onDismiss() {
WindowManager.LayoutParams layoutParams=mActivity.getWindow().getAttributes();
layoutParams.alpha=1.0f;
mActivity.getWindow().setAttributes(layoutParams);
}
});
//手机返回键监听，让ppw消失
popupView.setOnKeyListener(new View.OnKeyListener() {
@Override
public boolean onKey(View v, int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
mOperaPopup.dismiss();
return true;
}
return false;
}
});
}
int offX=ScreenInfomationLoader.getInstance().dpToPx(107);//适配自定义偏移距离（根据具体布局）
//gravity是表示ppw相对于anchor的左边距还是右边距，x方向向右为正，y方法，向下为正
mOperaPopup.showAsDropDown(anchor,-offX,0,Gravity.LEFT);
WindowManager.LayoutParams layoutParams=mActivity.getWindow().getAttributes();
layoutParams.alpha=0.8f;//通过透明度控制整体背景变暗，值越大，越透明；值越小，越暗。
mActivity.getWindow().setAttributes(layoutParams);
}
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标签：PopupWindow,layoutParams,源码,mOperaPopup,getWindow,ListView,View From： https://www.cnblogs.com/yunbaomengnan/p/17352472.html