某500強(qiáng)android學(xué)習(xí)資料-第六章-Android進(jìn)程間通信

第六章Android進(jìn)程間通信der便，制，對(duì)于庫(kù)和框架層的開(kāi)發(fā)人員來(lái)說(shuō)也會(huì)更多的用到底層的機(jī)制，這些內(nèi)容會(huì)放在另一篇d6.1BroadcastReceiver在android中，通過(guò)廣播(broadcast)可以通知其他廣播接受者某個(gè)事件發(fā)生了。比如電源publicclassBroadcastTestextendsActivity{publicstaticfinalStringNEW_LIFEFROM_DETECTED=“com.android.broadcasttest.NEW_LIFEFROM”;publicvoidonCreate(BundlesavedInstanceState){ButtonbtnButtonfindViewByIdRid.btn0);btn0.setOnClickListener(newOnClickListener(){publicvoidonClick(Viewv){ewIntentNEWLIFEFROMDETECTED}}…}PublicclassMyBroadcastReceiverextendsBroadcastReceiver{voidonReceiveContextcontextInteneintent}}eceiverandroidnameMyBroadcastReceiverntfilter<actionandroid:name=”com.android.broadcasttest.NEW_LIFEFROM”/>entfiltereroadcastBroadcastReceiver->通知Broadcast->啟動(dòng)相關(guān)處理應(yīng)用。比如，監(jiān)聽(tīng)來(lái)電、郵件、短信之類的，都隸oadcastReceivermReceivernewBroadcastReceivercvoidonReceiveContextcontextIntentintent}}ilternewIntentFiltermfilteraddActionIntentACTION_SCREEN_OFF);ivermReceivermfiltersterReceivermReceiverctivityManagerServicejavapandroidappdocsappspotcomreferenceandroidcontentIntenthtmlBroadcastr6.2IntentIntent是一種運(yùn)行時(shí)綁定(run-timebinding)機(jī)制，它能在程序運(yùn)行過(guò)程中連接兩個(gè)不同的要激活一個(gè)新的Activity，或者讓一個(gè)現(xiàn)有的Activity做新的操作，可以通過(guò)調(diào)用Context.startService()方法或者調(diào)用Context.bindService()方法將調(diào)用此方法的上下文對(duì)三個(gè)方法可以發(fā)送BroadcastIntent。發(fā)送之后，所有已注冊(cè)的并且擁有與之相匹配Intent一旦發(fā)出，Android都會(huì)準(zhǔn)確找到相匹配的一個(gè)或多個(gè)Activity，Service或者tntCTIONCALL啟動(dòng)一個(gè)電話.CTIONEDIT顯示用戶編輯的數(shù)據(jù).ACTIONMAINIONSYNCHEADSETPLUG警告ACTIONSCREEN_ON屏幕變亮警告.ONTIMEZONECHANGED改變時(shí)區(qū)警告.UriuriUriparse"");newIntentIntentACTIONVIEWurity該activity可以被包含在另外一個(gè)裝載小工具的activity中程序啟動(dòng)器中Type：顯式指定Intent的數(shù)據(jù)類型(MIME)(多用途互聯(lián)網(wǎng)郵件擴(kuò)展，Multipurposenttypecontent://com.example.transportationprovider/trains/122(一條列車信息的uri)的多個(gè)記錄的格式：vnd.android.cursor.dir/vnd.yourcompanyname.contenttype，如：contentcomexampletransportationprovidertrains(所有列車信息)的MIME類itnewIntentActivityMainthisActivityclassBundleputExtras)和getExtras()作為Bundle來(lái)讀和寫。例如：itnewIntentActivityMainthisActivityclassndlebundlenewBundlebundleputStringname,"ThisisfromMainActivity!");ndleBundlebundlegetIntentgetExtrasebundlegetStringnamesetClassContextClass件。是那些間接Intent，通過(guò)解析將Intent映射給可以處理此Intent的Activity、Service或estxmlintentfilterIntentcategory現(xiàn)在組建的類別列表中。標(biāo)組件必須至少包含這兩個(gè)類別。httpwwwcnblogscomphinecosarchive09/08/26/1554684.htmlfestxml<manifestxmlns:android="/apk/res/android"package="com.example.android.notepad">applicationandroidicondrawableappnotesoidlabelstringappnameoviderandroidnameNotePadProviderandroid:authorities="vider.NotePad"activityandroidnameNotesListandroidlabel"@string/title_notes_list">ntfilter<actionandroid:name="ent.action.MAIN"/><categoryandroid:name="ent.category.LAUNCHER"/>entfilterntfilter<actionandroid:name="ent.action.VIEW"/><actionandroid:name="ent.action.EDIT"/><actionandroid:name="ent.action.PICK"/><categoryandroid:name="ent.category.DEFAULT"/><dataandroid:mimeType="vnd.android.cursor.dir/vnd.google.note"/>entfilterntfilter<actionandroid:name="ent.action.GET_CONTENT"/><categoryandroid:name="ent.category.DEFAULT"/><dataandroid:mimeType="vnd.android.cursor.item/vnd.google.note"/>entfilterty選擇(android.app.action.PICK)。erivityandroidnameNoteEditordroidthemeandroidstyleThemeLightbelstringtitlenotenOrientationsensor>intentfilterandroidlabelstringresolve_edit"><actionandroid:name="ent.action.VIEW"/><actionandroid:name="ent.action.EDIT"/><actionandroid:name="com.android.notepad.action.EDIT_NOTE"/><categoryandroid:name="ent.category.DEFAULT"/><dataandroid:mimeType="vnd.android.cursor.item/vnd.google.note"/>entfilternotes.-->ntfilter<actionandroid:name="ent.action.INSERT"/><categoryandroid:name="ent.category.DEFAULT"/><dataandroid:mimeType="vnd.android.cursor.dir/vnd.google.note"/>entfilterty第一個(gè)filter查看、編輯便箋第二個(gè)filter新建便箋IVENamectionmponentNameIntentIntentintMenuItemivityandroidnameTitleEditorndroidlabelstringtitleedittitledroidthemeandroidstyleThemeDialogwindowSoftInputModestateVisibleintentfilterandroidlabel@string/resolve_title"><actionandroid:name="com.android.notepad.action.EDIT_TITLE"/><categoryandroid:name="ent.category.DEFAULT"/><categoryandroid:name="ent.category.ALTERNATIVE"/><dataandroid:mimeType="vnd.android.cursor.item/vnd.google.note"/>entfiltertyintentfilterandroidlabel="@string/resolve_title"指定)，yomgoogleandroidnotepadactionEDITTITLEtacontentcomgoogleproviderNotePadnotesIDandroidcomreferenceandroidcontentintenthtml6.3ContentProviderider一組用于提供其他應(yīng)用程序存取數(shù)據(jù)的標(biāo)準(zhǔn)方法的類。er查詢數(shù)據(jù)修改數(shù)據(jù)添加數(shù)據(jù)刪除數(shù)據(jù) “content://”代表數(shù)據(jù)的路徑一個(gè)可選的標(biāo)識(shí)數(shù)據(jù)的IDentcontactspeopleURIcontent://contacts/people/45這個(gè)URI返回單個(gè)結(jié)果(ID為45的聯(lián)系人記錄)Android提供了一系列的幫助類(在vider包下)，里面包含了很多以類變量形式MediaStoreImagesMediaINTERNAL_CONTENT_URIeopleCONTENTURIUriperson=ContentUriswithAppendedId(PeopleCONTENTURI詢:CursorcurmanagedQuerypersonnullnullnull);publicclassContentProviderDemoextendsActivity{publicvoidonCreate(BundlesavedInstanceState){vedInstanceStateRlayoutmainecords}privatevoiddisplayRecords(){Stringcolumns[]=newString[]{People.NAME,People.NUMBER};rimContactsPeopleCONTENTURIurmanagedQueryContactsif(cur.moveToFirst()){nulleNonulldo{namecurgetStringcurgetColumnIndexPeopleNAMEphoneNocurgetStringcur.getColumnIndex(People.NUMBER));extthisnamephoneNo,THLONG}}}更改第10條記錄的name字段值為“XYZ”privatevoidupdateRecord(intrecNo,Stringname){UriuriContentUriswithAppendedIdPeople.CONTENT_URI,recNo);entValuesvaluesnewContentValuesvaluesputPeopleNAMEname);getContentResolverupdateurivaluesnullnull;}privatevoidinsertRecords(Stringname,StringphoneNo){entValuesvaluesnewContentValuesvaluesputPeopleNAMEname);UriurigetContentResolverinsertPeople.CONTENT_URI,values);Log.d(”ANDROID”,uri.toString());YvaluesclearvaluesputContactsPhonesTYPEPeoplePhones.TYPE_MOBILE);valuesputPeopleNUMBERphoneNo;ontentResolverinsertnumberUrivalues}這樣我們就可以調(diào)用insertRecords(name,phoneNo)的方式來(lái)向聯(lián)系人信息簿中添加聯(lián)系人號(hào)碼。privatevoiddeleteRecords(){riuriPeopleCONTENTURIetContentResolverdeleteurinullnull}getContentResolver()deleteuriNAMEXYZ?”,null);好是類的全名稱，如ticfinalUriCONTENTURIUriparsecontentcommycomMyContentProvider實(shí)rCursor方法如insert(),update()以及gerpublicclassMyUsers{publicstaticfinalStringAUTHORITY“com.wissen.MyContentProvider”;publicstaticfinalclassUserimplementsBaseColumns{publicstaticfinalUriCONTENT_URI=UriparsecontentcomwissenMyContentProvider);publicstaticfinalStringUSERNAME=“USER_NAME”;}}publicclassMyContentProviderextendsContentProvider{privateSQLiteDatabasesqlDB;rivateDatabaseHelperdbHelperprivatestaticfinalStringDATABASE_NAME=“Users.db”;privatestaticfinalintDATABASE_VERSION=1;privatestaticfinalStringTABLE_NAME=“User”;privatestaticfinalStringTAG=“MyContentProvider”;privatestaticfinalStringDATABASE_CREATE=eatetableTABLENAMEerprimarykeyautoincrementUSERNAMEtexterprivatestaticclassDatabaseHelperextendsSQLiteOpenHelper{DatabaseHelper(Contextcontext){extDATABASENAMEnullDATABASEVERSION}edbSECREATE}{dbexecSQLDROPTABLEIFEXISTSTABLENAME;}}publicbooleanonCreate(){elpernewDatabaseHelpergetContextreturndbHelpernullfalsetrue}publicUriinsert(Uriuri,ContentValuescontentvalues){rgetWritableDatabasengrowIdsqlDBinsertTABLENAMEcontentvaluesif(rowId>0){UrirowUri=tentUrisappendIdMyUsersUserCONTENTURIbuildUpongetContextgetContentResolvernotifyChangerowUrinull}thrownewSQLExceptionFailedtoinsertrowintouri);}selectionArgs,StringsortOrder){ryBuilderqbnewSQLiteQueryBuilderabasedbdbHelpergetReadableDatabaseblesTABLENAMECursorcqbquerydbprojectionselection,ullnullnullsortOrderNotificationUrigetContextgetContentRes