android searchview setOnActionExpandListener on Ho

问题:

I'm developing an app for Android 3.2 and greater with android-support-v4. I need to implement OnActionExpandListener for "intercept" when SearchView in the actionbar is expanded and when is collapsed. My code for Android 4.0 and higher it's ok, but for 3.2 no.

menu.xml

<item android:id="@+id/menu_search"
    android:title="@string/menu_search"
    android:icon="@android:drawable/ic_menu_search"
    android:showAsAction="collapseActionView|always"
    android:actionViewClass="android.widget.SearchView" />

MyActivity.java

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.reader, menu);

    final MenuItem searchMI = menu.findItem(R.id.menu_search);
    if(searchView == null) {
        //searchView = (SearchView) searchMI.getActionView();
        searchView = (SearchView) MenuItemCompat.getActionView(searchMI);
        searchView.setOnQueryTextListener(this);
        searchView.setOnSuggestionListener(this);
        searchView.setOnCloseListener(new OnCloseListener() {

            @Override
            public boolean onClose() {
                //some code
                return false;
            }
        });
    }


    int currentapiVersion = android.os.Build.VERSION.SDK_INT;
    if (currentapiVersion <= android.os.Build.VERSION_CODES.HONEYCOMB_MR2) {
        MenuItemCompat.setShowAsAction(searchMI, MenuItemCompat.SHOW_AS_ACTION_COLLAPSE_ACTION_VIEW | MenuItemCompat.SHOW_AS_ACTION_ALWAYS);
        MenuItemCompat.setOnActionExpandListener(searchMI, new OnActionExpandListener() {

            /* (non-Javadoc)
             * @see android.support.v4.view.MenuItemCompat.OnActionExpandListener#onMenuItemActionExpand(android.view.MenuItem)
             */
            @Override
            public boolean onMenuItemActionExpand(MenuItem item) {
                Toast.makeText(getApplicationContext(), "onMenuItemActionExpand", Toast.LENGTH_SHORT).show();
                return true;
            }

            /* (non-Javadoc)
             * @see android.support.v4.view.MenuItemCompat.OnActionExpandListener#onMenuItemActionCollapse(android.view.MenuItem)
             */
            @Override
            public boolean onMenuItemActionCollapse(MenuItem item) {
                Toast.makeText(getApplicationContext(), "onMenuItemActionExpand", Toast.LENGTH_SHORT).show();
                return true;
            }
        });
    } else {
        searchMI.setOnActionExpandListener(new MenuItem.OnActionExpandListener() {

            @Override
            public boolean onMenuItemActionExpand(MenuItem item) {
                Toast.makeText(getApplicationContext(), "MenuItem#onMenuItemActionExpand", Toast.LENGTH_SHORT).show();
                return true;
            }

            @Override
            public boolean onMenuItemActionCollapse(MenuItem item) {
                Toast.makeText(getApplicationContext(), "MenuItem#onMenuItemActionExpand", Toast.LENGTH_SHORT).show();
                return true;
            }
        });
    }
}

Why, for Honeycomb, methods of listener is not invoked?

Thank you so much.

回答1:

You probably missed the fact (like I did) that `MenuItemCompat.OnActionExpandListener' interface has a static implementation, and is not an instance method.

So, if you have a class that implements MenuItemCompat.OnActionExpandListener then in that class you need to install it as the listener like this:

    MenuItem menuItem =  menu.findItem(R.id.search);
    if (menuItem != null) {
        MenuItemCompat.setOnActionExpandListener(menuItem,this);
        MenuItemCompat.setActionView(menuItem, mSearchView);
    }

The same paradigm applies to setActionView ... rather than invoke menuItem.setActionView(this), you pass the menuItem as the first argument to the static version MenuItemCompat.setActionView and follow with the other argument(s).

回答2:

For MenuItemCompat.setOnActionExpandListener to work you should add "collapseActionView" added in the menu item - for example -

<item android:id="@+id/action_search"
          android:icon="@drawable/ic_action_search"
          android:title="@string/action_search"
          app:showAsAction="ifRoom|collapseActionView"
          app:actionViewClass="android.support.v7.widget.SearchView" />

And in the onCreateOptionsMenu you can use it this way -

MenuItemCompat.setOnActionExpandListener(menu_search,
            new OnActionExpandListener()
            {
                @Override
                public boolean onMenuItemActionCollapse(MenuItem item)
                {
                    // Do something when collapsed
                    return true; // Return true to collapse action view
                }

                @Override
                public boolean onMenuItemActionExpand(MenuItem item)
                {
                    // Do something when expanded
                    return true; // Return true to expand action view
                }
            });

回答3:

I found that MenuItemCompat.setOnActionExpandListener(...) is not working if you don't pass:

    searchItem
            .setShowAsAction(MenuItemCompat.SHOW_AS_ACTION_COLLAPSE_ACTION_VIEW
                    | MenuItemCompat.SHOW_AS_ACTION_ALWAYS);

But this is changing the SearchView and is replacing the DrawerToggle with back arrow.

I wanted to keep the original views and still track the Expanded/Collapsed state and use supported Search View.

Solution:

When android.support.v7.widget.SearchView is changing the view state the LinearLayout view's, with id android.support.v7.appcompat.R.id.search_edit_frame, visibility value is being changed from View.VISIBLE to View.GONE and opposite. So I add ViewTreeObserver to track the visibility change of the search edit frame.

menu_search.xml:

<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto" >

<item
    android:id="@+id/action_search"
    android:icon="@android:drawable/ic_menu_search"
    android:title="@string/search"
    app:actionViewClass="android.support.v7.widget.SearchView"
    app:showAsAction="always"/>

</menu>

In the activity:

import android.support.v4.view.MenuItemCompat;
import android.support.v7.widget.SearchView;
import android.view.Menu;
import android.view.MenuItem;

..........

private View mSearchEditFrame;

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.menu_search, menu);
    MenuItem searchItem = (MenuItem) menu.findItem(R.id.action_search);

    SearchView searchView = (SearchView) MenuItemCompat
            .getActionView(searchItem);
    searchView.setSubmitButtonEnabled(false);
    mSearchEditFrame = searchView
            .findViewById(android.support.v7.appcompat.R.id.search_edit_frame);

    ViewTreeObserver vto = mSearchEditFrame.getViewTreeObserver();
    vto.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
        int oldVisibility = -1;

        @Override
        public void onGlobalLayout() {

            int currentVisibility = mSearchEditFrame.getVisibility();

            if (currentVisibility != oldVisibility) {
                if (currentVisibility == View.VISIBLE) {
                    Log.v(TAG, "EXPANDED");
                } else {
                    Log.v(TAG, "COLLAPSED");
                }

                oldVisibility = currentVisibility;
            }

        }
    });

    return super.onCreateOptionsMenu(menu);
}

Thanks!

回答4:

Your Listener should be MenuItemCompat.OnActionExpandListener() .

MenuItemCompat.setOnActionExpandListener(searchItem,
            new MenuItemCompat.OnActionExpandListener() {

}

回答5:

thanks for your help, your solution is work for me. and i'd like to vote you up, but i just realized i have only 1 reputation，(；′⌒`)

actually, my solution is similar to your, there is just one different in the menu xml file like this:

    <item
    android:id="@+id/apps_menu_search"
    android:icon="@drawable/ic_action_search"
    android:title="@string/apps_menu_search"
    android:visible="true"
    app:actionViewClass="android.support.v7.widget.SearchView"
    app:showAsAction="ifRoom|collapseActionView" />