我试图从一组片段中添加一个项目到选项菜单。
我已经创建了一个新的MenuFragment类，并扩展了我希望包含菜单项的片段。代码如下:
Java:
public class MenuFragment extends Fragment {
MenuItem fav;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
}
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
fav = menu.add("add");
fav.setIcon(R.drawable.btn_star_big_off);
}
}
科特林：
class MenuFragment : Fragment {
lateinit var fav: MenuItem
override fun onCreate(savedInstanceState: Bundle) {
super.onCreate(savedInstanceState)
setHasOptionsMenu(true)
}
override fun onCreateOptionsMenu(menu: Menu, inflater: MenuInflater) {
fav = menu.add("add");
fav.setIcon(R.drawable.btn_star_big_off);
}
}
由于某种原因，onCreateOptionsMenu似乎没有运行。
如果你需要一个菜单来刷新一个特定片段中的webview，你可以使用:
片段:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
// TODO Add your menu entries here
inflater.inflate(R.menu.menu, menu);
super.onCreateOptionsMenu(menu, inflater);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.exit:
System.exit(1);
break;
case R.id.refresh:
webView.reload();
break;
}
return true;
}
menu。xml
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<item android:id="@+id/exit" android:title="Exit" android:icon="@drawable/ic_action_cancel" />
<item android:id="@+id/refresh" android:title="Refresh" android:icon="@drawable/ic_action_refresh" />
</menu>
调用super方法:
Java:
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
// TODO Add your menu entries here
super.onCreateOptionsMenu(menu, inflater);
}
科特林：
override fun void onCreate(savedInstanceState: Bundle) {
super.onCreate(savedInstanceState)
setHasOptionsMenu(true)
}
override fun onCreateOptionsMenu(menu: Menu, inflater: MenuInflater) {
// TODO Add your menu entries here
super.onCreateOptionsMenu(menu, inflater)
}
在代码中放入日志语句，以查看是否没有调用该方法，或者您的代码是否没有修改菜单。
同时确保你在onCreate(Bundle)中调用sethasoptionmenu (boolean)来通知片段它应该参与选项菜单处理。
如果上面的选项都不适合你，在你的片段中试试这个:
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setHasOptionsMenu(true)
}
override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
....
toolBar = rootView.findViewById(R.id.import_contacts_toolbar)
toolBar?.title = "Your title"
toolBar?.subtitle = "yor subtitile"
contactsActivity().setSupportActionBar(toolBar)
toolBar?.inflateMenu(R.menu.import_contacts_menu)
...
}
override fun onOptionsItemSelected(item: MenuItem): Boolean {
when (item.itemId) {
R.id.1 -> {
return true
}
R.id.2 -> {
return true
}
}
return false
}
override fun onCreateOptionsMenu(menu: Menu, inflater: MenuInflater) {
menu.clear()
inflater.inflate(R.menu.import_contacts_menu, menu)
super.onCreateOptionsMenu(menu, inflater)
val search = menu.findItem(R.id.action_search)
val searchView = search.actionView as SearchView
searchView.requestFocus()
val txtSearch = searchView.findViewById<View>(androidx.appcompat.R.id.search_src_text) as EditText
txtSearch.hint = "Search..."
txtSearch.setHintTextColor(Color.WHITE);
txtSearch.setTextColor(Color.WHITE)
try {
val f: Field = TextView::class.java.getDeclaredField("mCursorDrawableRes")
f.setAccessible(true)
f.set(txtSearch, R.drawable.search_edit_text_cursor)
} catch (ignored: Exception) {
Log.d(TAG, "failed to expose cursor drawable $ignored")
}
searchView.setOnQueryTextListener(object : SearchView.OnQueryTextListener {
override fun onQueryTextSubmit(query: String): Boolean {
return false
}
override fun onQueryTextChange(newText: String): Boolean {
return true
}
})
searchView.setOnCloseListener {
}
}
在我的例子中，我有一个搜索菜单项，它被设置为始终可见。这是它的xml文件:
<?xml version="1.0" encoding="utf-8"?>
<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"
app:showAsAction="always"
app:actionViewClass="androidx.appcompat.widget.SearchView"
android:title="Search"/>
<item android:id="@+id/1"
android:title="1">
</item>
<item android:id="@+id/2"
android:title="2">
</item>
</menu>
在菜单文件夹中创建一个.menu xml文件，并添加这个xml文件
<item
android:id="@+id/action_search"
android:icon="@android:drawable/ic_menu_search"
android:title="@string/action_search"
app:actionViewClass="android.support.v7.widget.SearchView"
app:showAsAction="always|collapseActionView" />
在您的片段类中重写此方法和
implement SearchView.OnQueryTextListener in your fragment class
@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
setHasOptionsMenu(true);
}
现在只需在fragment class中设置你的菜单xml文件
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
inflater.inflate(R.menu.menu_main, menu);
final MenuItem item = menu.findItem(R.id.action_search);
final SearchView searchView = (SearchView)
MenuItemCompat.getActionView(item);
MenuItemCompat.setOnActionExpandListener(item,
new MenuItemCompat.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
}
});
}
菜单文件:
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:id="@+id/play"
android:titleCondensed="Speak"
android:showAsAction="always"
android:title="Speak"
android:icon="@drawable/ic_play">
</item>
<item
android:id="@+id/pause"
android:titleCondensed="Stop"
android:title="Stop"
android:showAsAction="always"
android:icon="@drawable/ic_pause">
</item>
</menu>
活动代码:
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.speak_menu_history, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.play:
Toast.makeText(getApplicationContext(), "speaking....", Toast.LENGTH_LONG).show();
return false;
case R.id.pause:
Toast.makeText(getApplicationContext(), "stopping....", Toast.LENGTH_LONG).show();
return false;
default:
break;
}
return false;
}
片段代码:
@Override
public void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.play:
text = page.getText().toString();
speakOut(text);
// Do Activity menu item stuff here
return true;
case R.id.pause:
speakOf();
// Not implemented here
return true;
default:
break;
}
return false;
}
