从零开始--系统深入学习android（实践-让我们开始写代码-Android框架学习-3. 菜单）

@Override
publicvoidonCreateContextMenu(ContextMenumenu,Viewv,
ContextMenuInfomenuInfo){
super.onCreateContextMenu(menu,v,menuInfo);
MenuInflaterinflater=getMenuInflater();
inflater.inflate(R.menu.context_menu,menu);
}

@Override
publicbooleanonContextItemSelected(MenuItemitem){
AdapterContextMenuInfoinfo=(AdapterContextMenuInfo)item.getMenuInfo();
switch(item.getItemId()){
caseR.id.edit:
editNote(info.id);
returntrue;
caseR.id.delete:
deleteNote(info.id);
returntrue;
default:
returnsuper.onContextItemSelected(item);
}
}

privateActionMode.CallbackmActionModeCallback=newActionMode.Callback(){
@Override
publicbooleanonCreateActionMode(ActionModemode,Menumenu){
MenuInflaterinflater=mode.getMenuInflater();
inflater.inflate(R.menu.context_menu,menu);
returntrue;
}

@Override
publicbooleanonPrepareActionMode(ActionModemode,Menumenu){
returnfalse;
}

@Override
publicbooleanonActionItemClicked(ActionModemode,MenuItemitem){
switch(item.getItemId()){
caseR.id.menu_share:
shareCurrentItem();
mode.finish();
returntrue;
default:
returnfalse;
}
}

@Override
publicvoidonDestroyActionMode(ActionModemode){
mActionMode=null;
}
};

someView.setOnLongClickListener(newView.OnLongClickListener(){
publicbooleanonLongClick(Viewview){
if(mActionMode!=null){
returnfalse;
}
mActionMode=getActivity().startActionMode(mActionModeCallback);
view.setSelected(true);
returntrue;
}
});

ListViewlistView=getListView();
listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE_MODAL);
listView.setMultiChoiceModeListener(newMultiChoiceModeListener(){

@Override
publicvoidonItemCheckedStateChanged(ActionModemode,intposition,
longid,booleanchecked){
}

@Override
publicbooleanonActionItemClicked(ActionModemode,MenuItemitem){
switch(item.getItemId()){
caseR.id.menu_delete:
deleteSelectedItems();
mode.finish();
returntrue;
default:
returnfalse;
}
}

@Override
publicbooleanonCreateActionMode(ActionModemode,Menumenu){
MenuInflaterinflater=mode.getMenuInflater();
inflater.inflate(R.menu.context,menu);
returntrue;
}

@Override
publicvoidonDestroyActionMode(ActionModemode){

}

@Override
publicbooleanonPrepareActionMode(ActionModemode,Menumenu){

returnfalse;
}
});

3.4创建弹出菜单

<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/ic_overflow_holo_dark"
android:contentDescription="@string/descr_overflow_button"
android:onClick="showPopup"/>

publicvoidshowPopup(Viewv){
PopupMenupopup=newPopupMenu(this,v);
MenuInflaterinflater=popup.getMenuInflater();
inflater.inflate(R.menu.actions,popup.getMenu());
popup.show();
}

publicvoidshowMenu(Viewv){
PopupMenupopup=newPopupMenu(this,v);
popup.setOnMenuItemClickListener(this);
popup.inflate(R.menu.actions);
popup.show();
}

@Override
publicbooleanonMenuItemClick(MenuItemitem){
switch(item.getItemId()){
caseR.id.archive:
archive(item);
returntrue;
caseR.id.delete:
delete(item);
returntrue;
default:
returnfalse;
}
}

<?xmlversion="1.0"encoding="utf-8"?>
<menuxmlns:android="http://schemas.android.com/apk/res/android">
<itemandroid:id="@+id/menu_save"
android:icon="@drawable/menu_save"
android:title="@string/menu_save"/>
<!--menugroup-->
<groupandroid:id="@+id/group_delete">
<itemandroid:id="@+id/menu_archive"
android:title="@string/menu_archive"/>
<itemandroid:id="@+id/menu_delete"
android:title="@string/menu_delete"/>
</group>
</menu>

<?xmlversion="1.0"encoding="utf-8"?>
<menuxmlns:android="http://schemas.android.com/apk/res/android">
<groupandroid:checkableBehavior="single">
<itemandroid:id="@+id/red"
android:title="@string/red"/>
<itemandroid:id="@+id/blue"
android:title="@string/blue"/>
</group>
</menu>

@Override
publicbooleanonOptionsItemSelected(MenuItemitem){
switch(item.getItemId()){
caseR.id.vibrate:
caseR.id.dont_vibrate:
if(item.isChecked())item.setChecked(false);
elseitem.setChecked(true);
returntrue;
default:
returnsuper.onOptionsItemSelected(item);
}
}

@Override
publicbooleanonCreateOptionsMenu(Menumenu){
super.onCreateOptionsMenu(menu);
Intentintent=newIntent(null,dataUri);
intent.addCategory(Intent.CATEGORY_ALTERNATIVE);
menu.addIntentOptions(
R.id.intent_group,//将被添加到菜单组的item
0,//唯一itemID(none)
0,//items顺序(none)
this.getComponentName(),//当前activityname
null,//指定第一次放置的位置(none)
intent,//根据我们的需求，传入的intent
0,//用来控制items的附加标志(none)
null);//关联指定items的菜单items数组(none)

returntrue;
}

<intent-filterlabel="@string/resize_image">
...
<categoryandroid:name="android.intent.category.ALTERNATIVE"/>
<categoryandroid:name="android.intent.category.SELECTED_ALTERNATIVE"/>
...
</intent-filter>