Found the problem.
After looking at the source code of PopupWindow, I found the
TouchInteceptor will only be called if the background drawable is not
null. Here is the snip:
private void preparePopup(WindowManager.LayoutParams p) {
if (mBackground != null) {
//...
PopupViewContainer popupViewContainer = new
PopupViewContainer(mContext);
// ...
mPopupView = popupViewContainer;
} else {
mPopupView = mContentView;
}
// ...
}
And the mTouchInterceptor.onTouch will only be called inside the
PopupViewContainer.
So in my code, after I set the background drawable to whatever, (I
used new BitmapDrawable()), the touch event will be intercepted here.
However, I still don't understand why this method only works when
there is a background drawable, here is what's said in doc:
"""
public void setTouchInterceptor (View.OnTouchListener l)
Set a callback for all touch events being dispatched to the popup window.
"""
Regards,
Johnny
On Tue, May 26, 2009 at 3:21 PM, Johnny Lee <[email protected]> wrote:
> Hi all,
>
> I want to intercept the OnTouch event in a PopupWindow, but it failes
> everytime. Here is the code snip:
>
> public class Demo extends Activity {
>
> �...@override
> protected void onCreate(Bundle savedInstanceState) {
> super.onCreate(savedInstanceState);
>
> // Prepare the popup window
> final TextView popupText = new TextView(this);
> popupText.setText("Poping up...");
> popupText.setBackgroundColor(Color.BLUE);
> popupText.setFocusableInTouchMode(true);
>
> final PopupWindow popupWindow = new PopupWindow(this);
> popupWindow.setContentView(popupText);
> popupWindow.setWidth(100);
> popupWindow.setHeight(100);
> popupWindow.setBackgroundDrawable(null);
> popupWindow.setOutsideTouchable(true);
> popupWindow.setTouchInterceptor(new OnTouchListener() {
>
> public boolean onTouch(View v, MotionEvent event) {
> Log.d("Demo", "popupWindow::onTouch >>> view:
> " + v + ", event: " + event);
> return false;
> }
>
> });
>
> // Prepare the activity view
> final LinearLayout layout = new LinearLayout(this);
> layout.setOrientation(LinearLayout.VERTICAL);
> layout.setOnTouchListener(new OnTouchListener() {
>
> public boolean onTouch(View v, MotionEvent event) {
> Log.d("Demo", "layout::onTouch >>> view: " + v
> + ", event: " + event);
> return false;
> }
>
> });
>
> final TextView backgroundView = new TextView(this);
> backgroundView.setWidth(240);
> backgroundView.setHeight(300);
> backgroundView.setBackgroundColor(Color.RED);
> layout.addView(backgroundView);
>
> final Button button = new Button(this);
> button.setWidth(240);
> button.setHeight(20);
> button.setOnClickListener(new OnClickListener() {
>
> public void onClick(View v) {
> popupWindow.showAsDropDown(backgroundView);
> }
>
> });
> layout.addView(button);
>
> setContentView(layout);
> }
>
> When the activity started, I can click the button to show the popup
> window correctly. But after that, nothing happens when I touch the
> popup window's view. But if I touch any where outside the popup
> window, the log
> Log.d("Demo", "layout::onTouch >>> view: " + v + ", event: " + event);
> will work.
>
> It looks like when I touch the view of the popup window, the touch
> event has been consumed somewhere?
>
> Do you have any ideas on this? Thanks for your consideration.
>
> Regards,
> Johnny
> --
> we all have our crosses to bear
>
--
we all have our crosses to bear
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