I'm using PopupWindow to develop a Menu style UI. The content view of
PopupWindow is created programmatically. The outer view is a scrollview and
it has a new LinearLayout, the fragment codes is like:
public class ContainerView extends ScrollView {
...
public ContainerView(Context context) {
super(context);
init();
}
public ContainerView(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
private void init() {
...
mContentView = new LinearLayout(getContext());
mContentView.setOrientation(LinearLayout.VERTICAL);
FrameLayout.LayoutParams layoutParams = new
FrameLayout.LayoutParams(LayoutParams.MATCH_PARENT,
LayoutParams.WRAP_CONTENT);
layoutParams.bottomMargin = mArrowHeight;
addView(mContentView, layoutParams);
}
I just want to dynamically create Menu item before showing PopupWindow, so
my codes can accept a user customized Menu item layout and inflate it when
user call addMenu function.
But I also want to reuse Menu item view if user dismiss PopupWindow and
reshow again! So I setVisibility with GONE when PopupWindow is dismissed
and visible it when addMenu is called, the codes just like:
public void addMenu(int id, String title, Drawable d) {
View v = mContainerView.getMenuView(mMenus.size());
mMenus.add(new MenuItem(id, title, d));
if (null != v) {
v.setVisibility(View.VISIBLE);
} else {
v = ((Activity)mContext).getLayoutInflater().inflate(mMenuResId, null);
mContainerView.addMenuView(v);
}
* TextView text = (TextView)v.findViewById(mTextResId);*
text.setText(title);
text.setId(id);
text.setOnClickListener(mViewOnClickListener);
if (mImageResId > 0) {
ImageView img = (ImageView)v.findViewById(mImageResId);
img.setImageDrawable(d);
img.setId(id);
img.setOnClickListener(mViewOnClickListener);
}
}
The Menu window can display without any error at the first time, but if
dismiss it(touch screen out of PopupWindow) and click button to show it
again, the exception is raised. The TextView object in the bold line is
null. I debugged and the Menu item view is valid and also contains a valid
TextView, but the id of *TextView is 0, *Why? I don't know who reset the id
the TextView. I added breakpoint in onDismiss listener and found the ids of
all Menu item view are cleared. I have no idea about it. Could you please
help me take a look? How could I fix it?
Thanks a lot!
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