50 Android Hacks.pdf

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1、CarlosSessaFOREWORDBYJakeWhartonMANNING50AndroidHacks50AndroidHacksCARLOSSESSAMANNINGSHELTERISLANDForonlineinformationandorderingofthisandotherManningbooks,pleasevisitwww.manning.com.Thepublisheroffersdiscountsonthisbookwhenorderedinquantity.Formoreinformation,pleasecontactSpecialSalesDe

2、partmentManningPublicationsCo.20BaldwinRoadPOBox261ShelterIsland,NY11964.©2013byManningPublicationsCo.Allrightsreserved.Nopartofthispublicationmaybereproduced,storedinaretrievalsystem,ortransmitted,inanyformorbymeanselectronic,mechanical,photocopying,orotherwise,withoutpriorwrittenpermis

3、sionofthepublisher.Manyofthedesignationsusedbymanufacturersandsellerstodistinguishtheirproductsareclaimedastrademarks.Wherethosedesignationsappearinthebook,andManningPublicationswasawareofatrademarkclaim,thedesignationshavebeenprintedininitialcapsorallcaps.Recognizingtheimportanceofprese

4、rvingwhathasbeenwritten,itisManning’spolicytohavethebookswepublishprintedonacid-freepaper,andweexertourbesteffortstothatend.Recognizingalsoourresponsibilitytoconservetheresourcesofourplanet,Manningbooksareprintedonpaperthatisatleast15percentrecycledandprocessedwithouttheuseofelementalchl

5、orine.ManningPublicationsCo.Developmenteditor:CynthiaKane20BaldwinRoadTechnicalproofreader:CyrilMottierPOBox261Copyeditor:BenjaminBergShelterIsland,NY11964Proofreader:KatieTennantTypesetter:DottieMarsicoCoverdesigner:MarijaTudorISBN9781617290565PrintedintheUnitedStatesofAmerica1234567891

6、0–MAL–181716151413Almilagroquehizoestoposible(Tothemiraclethatmadethispossible)briefcontents1■Workingyourwayaroundlayouts12■Creatingcoolanimations193■Viewtipsandtricks294■Tools475■Patterns536■Workingwithlistsandadapters777■Usefullibraries978■Interactingwithotherlanguages1079■Ready-to-use

7、snippets11710■Beyonddatabasebasics13311■Avoidingfragmentation15712■Buildingtools171viicontentsforewordxviiprefacexixacknowledgmentsxxiaboutthisbookxxiiiaboutthecoverillustrationxxvii1Workingyourwayaroundlayouts1HACK1CENTERINGVIEWSUSINGWEIGHTS11.1CombiningweightSumandlayou