【移動應(yīng)用開發(fā)技術(shù)】iconContextMenu

點(diǎn)擊一個控件后，在屏幕中央彈出一個類似menu菜單欄packagecom.example.contextmenu;importandroid.app.Activity;importandroid.content.Context;importandroid.content.res.Resources;importandroid.os.Bundle;importandroid.util.Log;importandroid.view.Menu;importandroid.view.SubMenu;importandroid.view.View;importandroid.view.View.OnClickListener;importandroid.widget.Button;importandroid.widget.Toast;publicclassContextActivityextendsActivityimplementsOnClickListener{ privatefinalintCONTEXT_MENU_ID=1; privatestaticfinalintCTX_MENU_ITEM_ADD=Menu.FIRST;//

privatestaticfinalintCTX_MENU_ITEM_DELETE=Menu.FIRST+1; privatestaticfinalintCTX_MENU_ITEM_FIND=Menu.FIRST+2; privateIconContextMenuiconContextMenu; privateButtonbtn; privateContextmContext; @Override protectedvoidonCreate(BundlesavedInstanceState){ super.onCreate(savedInstanceState); setContentView(R.layout.activity_context); mContext=this; btn=(Button)findViewById(R.id.button1); btn.setOnClickListener(this); } privatevoidshowContext(){ Resourcesres=getResources(); //initthemenu if(iconContextMenu==null) iconContextMenu=newIconContextMenu(this,CONTEXT_MENU_ID); iconContextMenu.clearItems(); R.drawable.revert,CTX_MENU_ITEM_ADD); iconContextMenu.addItem(res,getText(R.string.delete),// R.drawable.play,CTX_MENU_ITEM_DELETE); iconContextMenu.addItem(res,getText(R.string.find),// R.drawable.question,CTX_MENU_ITEM_FIND); iconContextMenu.setOnClickListener(newIconContextMenu.IconContextMenuOnClickListener(){ @Override publicvoidonClick(intmenuId){ //TODOAuto-generatedmethodstub Stringstr="null"; switch(menuId){ caseCTX_MENU_ITEM_ADD: str="增加"; break; caseCTX_MENU_ITEM_DELETE: str="刪除"; break; caseCTX_MENU_ITEM_FIND: str="查找"; break; } Log.v("iconcontext",str); Toast.makeText(mContext,str,Toast.LENGTH_SHORT).show(); } }); } @Override publicvoidonClick(Viewarg0){ //TODOAuto-generatedmethodstub if(arg0.equals(btn)){ showContext(); iconContextMenu.createMenu("IconContextMenu").show(); } }}//封裝的類IconContextMenu

packagecom.example.contextmenu;importjava.util.ArrayList;importandroid.app.Activity;importandroid.app.AlertDialog;importandroid.app.Dialog;importandroid.content.Context;importandroid.content.DialogInterface;importandroid.content.res.Resources;importandroid.content.res.Resources.Theme;importandroid.graphics.Color;importandroid.graphics.drawable.Drawable;importandroid.util.TypedValue;importandroid.view.View;importandroid.view.ViewGroup;importandroid.widget.AbsListView;importandroid.widget.BaseAdapter;importandroid.widget.TextView;publicclassIconContextMenuimplementsDialogInterface.OnCancelListener,DialogInterface.OnDismissListener{ // privatestaticfinalintBuild_VERSION_CODES_ICE_CREAM_SANDWICH=14; privatestaticfinalintLIST_PREFERED_HEIGHT=85; privateIconMenuAdaptermenuAdapter=null; privateActivityparentActivity=null; privateIconContextMenuOnClickListenerclickHandler=null; /** *constructor *

*@paramparent *@paramid */ publicIconContextMenu(Activityparent,intid){ this.parentActivity=parent; menuAdapter=newIconMenuAdapter(parentActivity); } /** *Addmenuitem *

*@parammenuItem */ publicvoidaddItem(Resourcesres,CharSequencetitle,intp_w_picpathResourceId,intactionTag){ menuAdapter.addItem(newIconContextMenuItem(res,title,p_w_picpathResourceId,actionTag)); } publicvoidaddItem(Resourcesres,inttextResourceId,intp_w_picpathResourceId,intactionTag){ menuAdapter.addItem(newIconContextMenuItem(res,textResourceId,p_w_picpathResourceId,actionTag)); } publicvoidclearItems(){ menuAdapter.clearItems(); } /** *Setmenuonclicklistener *

*@paramlistener */ publicvoidsetOnClickListener(IconContextMenuOnClickListenerlistener){ clickHandler=listener; } /** *Createmenu *

*@return */ publicDialogcreateMenu(StringmenuItitle){ finalAlertDialog.Builderbuilder=newAlertDialog.Builder(parentActivity); builder.setTitle(menuItitle); builder.setAdapter(menuAdapter,newDialogInterface.OnClickListener(){ @Override publicvoidonClick(DialogInterfacedialoginterface,inti){ IconContextMenuItemitem=(IconContextMenuItem)menuAdapter.getItem(i); if(clickHandler!=null){ clickHandler.onClick(item.actionTag); } } }); builder.setInverseBackgroundForced(true); AlertDialogdialog=builder.create(); dialog.setOnCancelListener(this); dialog.setOnDismissListener(this); returndialog; } publicvoidonCancel(DialogInterfacedialog){ cleanup(); } publicvoidonDismiss(DialogInterfacedialog){ } privatevoidcleanup(){ //parentActivity.dismissDialog(dialogId); } /** *IconContextMenuOnClickListenerinterface */ publicinterfaceIconContextMenuOnClickListener{ publicabstractvoidonClick(intmenuId); } /** *Menu-likelistadapterwithicon */ protectedclassIconMenuAdapterextendsBaseAdapter{ privateContextcontext=null; privateArrayList<IconContextMenuItem>mItems=newArrayList<IconContextMenuItem>(); publicIconMenuAdapter(Contextcontext){ this.context=context; } /** *additemtoadapter *

*@parammenuItem */ publicvoidaddItem(IconContextMenuItemmenuItem){ mItems.add(menuItem); } publicvoidclearItems(){ mItems.clear(); } @Override publicintgetCount(){ returnmItems.size(); } @Override publicObjectgetItem(intposition){ returnmItems.get(position); } @Override publiclonggetItemId(intposition){ IconContextMenuItemitem=(IconContextMenuItem)getItem(position); returnitem.actionTag; } @SuppressWarnings("deprecation") @Override publicViewgetView(intposition,ViewconvertView,ViewGroupparent){ IconContextMenuItemitem=(IconContextMenuItem)getItem(position); Resourcesres=parentActivity.getResources(); if(convertView==null){ TextViewtemp=newTextView(context); AbsListView.LayoutParamsparam=newAbsListView.LayoutParams(AbsListView.LayoutParams.FILL_PARENT,

AbsListView.LayoutParams.WRAP_CONTENT); temp.setLayoutParams(param); temp.setPadding((int)toPixel(res,15),0,(int)toPixel(res,15),0); temp.setGravity(android.view.Gravity.CENTER_VERTICAL); Themeth=context.getTheme(); TypedValuetv=newTypedValue(); if(th.resolveAttribute(android.R.attr.textAppearanceLargeInverse,tv,true)){ temp.setTextAppearance(context,tv.resourceId); } temp.setMinHeight(LIST_PREFERED_HEIGHT); temp.setCompoundDrawablePadding((int)toPixel(res,20)); convertView=temp; } TextViewtextView=(TextView)convertView; textView.setTag(item); textView.setText(item.text); textView.setTextColor(Color.BLACK);//剛開始，這里沒有為自體設(shè)置顏色，導(dǎo)致文字看不出來 textView.setCompoundDrawablesWithIntrinsicBounds(item.p_w_picpath,null,null,null); returntextView; } privatefloattoPixel(Resourcesres,intdip){ floatpx=TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,dip,res.getDisplayMetrics()); returnpx; } } /** *menu-likelistitemwithicon */ protectedclassIconContextMenuItem{ publicfinalCharSequencetext; publicfinalDrawablep_w_picpath; publicfinalintactionTag; /** *publicconstructor *

*@paramres *

resourcehandler *@paramtextResourceId *

idoftitleinresource *@paramp_w_picpathResourceId *

idoficoninresource *@paramactionTag *

indicateactionofmenuitem */ publicIconContextMenuItem(Resourcesres,inttextResourceId,intp_w_picpathResourceId,intactionTag){ text=res.getString(textResourceId); if(p_w_picpathResourceId!=-1){ p_w_picpath=res.getDrawable(p_w_picpathResourceId); }else{ p_w_picpath=null; } this.actionTag=actionTag; } /** *publicconstructor *

*@paramres *

resourcehan