["Starting Point"-Baidu map mobile SDK] How do I use offline maps?

Abstract: when you use a map, you want to display the map without connecting to the Internet. In this case, you need to use the offline map. How can I introduce offline maps in Baidu map SDK?

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Related reading:

1. [Baidu map-android SDK]: Write android from scratchProgram
Http://www.cnblogs.com/milkmap/archive/2011/11/25/2263475.html

2. ["Starting Point"-Baidu map mobile SDK] how to create a map
Http://www.cnblogs.com/milkmap/archive/2012/05/11/2496526.html

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1. Download the offline map package

Download offline map package to the official website, web site: http://shouji.baidu.com/map/map.html? From = 3052

First, select the mobile phone brand and mobile phone model:

 

 

 

After you select your phone, the system prompts you. Select the old version map to download.

Currently, the SDK can only use raster graphs, so we must download the old version of maps. In the future, the SDK will support vector graphs, and the offline map of Beijing will be reduced from MB to 14 Mb.

It is expected that the new offline map will be available in May ~~~

 

For example, I chose to download the offline map of Beijing:

 

 

After decompression, there are two files. One is baidumap and the other is installation instructions.

 

Do not care about the installation instructions. Open the baidumap and you can see the mapdata folder. Copy this folder.

 

Copy the mapdata folder to the root directory of the baidumapsdk folder on the mobile phone SD card.

 

2. Compile an offline MapCode

Find the main java file and declare the variable in the activity.

 
Mkofflinemap moffline =Null;//Offline map Variables
 

 

Then write the offline map initialization code in the oncreate function:

/**  Offline map initialization *  */  Moffline = New  Mkofflinemap (); moffline. INIT (mbmapman,  New  Mkofflinemaplistener (){  Public   Void Ongetofflinemapstate ( Int Type, Int  State ){  Switch (Type ){  Case  Mkofflinemap. type_download_update: {mkolupdateelement update = Moffline. getupdateinfo (State );  //  Mtext. settext (string. Format ("% s: % d %", update. cityname, update. ratio ));  }  Break  ;  Case  Mkofflinemap. type_new_offline: log. D ( "Offlinedemo", String. Format ("add offlinemap num: % d" , State ));  Break  ;  Case  Mkofflinemap. type_ver_update: log. D ( "Offlinedemo", String. Format ("New offlinemap Ver" ));  Break  ;}}});  /**  Offline map import offline package *  */          Int Num =Moffline. Scan ();  //  If (num! = 0) mtext. settext (string. Format ("% d offline packages installed", num )); 

 

3. Connect to the real machine and check the running result.

See, this is not connected to the network, and the effect of the map is displayed.

 

4. All java filesSource code

 Package  Com. Baidu. searchpoi;  Import  Android. App. activity;  Import  Android. OS. Bundle;  /**  Introduction Class * */  Import  Java. util. arraylist;  Import  Java. util. List;  Import  Android. content. context;  Import  Android. Graphics. Canvas;  Import  Android. Graphics. paint;  Import  Android. Graphics. Point;  Import  Android. Graphics. drawable. drawable; Import  Android. Location. location;  Import  Android. OS. Bundle;  Import  Android. util. log;  Import  Android. View. view;  Import  Android. widget. Toast;  Import  Com. Baidu. mapapi. bmapmanager;  Import  Com. Baidu. mapapi. geopoint;  Import Com. Baidu. mapapi. itemizedoverlay;  Import  Com. Baidu. mapapi. locationlistener;  Import  Com. Baidu. mapapi. mkaddrinfo;  Import  Com. Baidu. mapapi. mkdrivingrouteresult;  Import  Com. Baidu. mapapi. mkgenerallistener;  Import  Com. Baidu. mapapi. mklocationmanager;  Import  Com. Baidu. mapapi. mkolupdateelement;  Import Com. Baidu. mapapi. mkofflinemap;  Import  Com. Baidu. mapapi. mkofflinemaplistener;  Import  Com. Baidu. mapapi. mkplannode;  Import  Com. Baidu. mapapi. mkpoiresult;  Import  Com. Baidu. mapapi. mksearch;  Import  Com. Baidu. mapapi. mksearchlistener;  Import  Com. Baidu. mapapi. mktransitrouteresult;  Import Com. Baidu. mapapi. mkwalkingrouteresult;  Import  Com. Baidu. mapapi. mapactivity;  Import  Com. Baidu. mapapi. mapcontroller;  Import  Com. Baidu. mapapi. mapview;  Import  Com. Baidu. mapapi. mylocationoverlay;  Import  Com. Baidu. mapapi. overlay;  Import  Com. Baidu. mapapi. overlayitem;  Import Com. Baidu. mapapi. poioverlay;  Import  Com. Baidu. mapapi. routeoverlay;  Import  Com. Baidu. mapapi. transitoverlay;  /**  Activity *  */  Public   Class Searchpoiactivity Extends  Mapactivity {  //  Declarative Variables Bmapmanager mbmapman =Null  ; Mapview mmapview = Null  ; Mkofflinemap moffline = Null ; //  Offline map Variables  @ Override  Public   Void  Oncreate (bundle savedinstancestate ){  Super  . Oncreate (savedinstancestate); setcontentview (R. layout. Main); mbmapman =New  Bmapmanager (getapplication (); mbmapman. INIT ( "4aa2949e616e069c37cdc3152e8c401a05a0035d ", Null  );  Super  . Initmapactivity (mbmapman); mmapview = (Mapview) findviewbyid (R. Id. bmapsview); mmapview. setbuiltinzoomcontrols (  True ); //  Set to enable the built-in zoom control  Mapcontroller mmapcontroller = Mmapview. getcontroller ();//  Get control of mmapview, which can be used to control and drive translation and Scaling Geopoint point = New Geopoint (( Int ) (39.93 * 1e6 ),(  Int ) (116.42*1e6 )); //  Construct a geopoint with the given longitude and latitude, in the unit of "micro" (degree * 1e6) Mmapcontroller. setcenter (point ); //  Set map center point Mmapcontroller. setzoom (13 ); //  Set map zoom level //  Mmapview. setsatellite (true );  //  Satellite Map  //  Mmapview. settraffic (true );  //  Traffic Flow                  /**  Offline map initialization *  */  Moffline = New  Mkofflinemap (); moffline. INIT (mbmapman,  New Mkofflinemaplistener (){  Public   Void Ongetofflinemapstate ( Int Type, Int  State ){  Switch  (Type ){  Case  Mkofflinemap. type_download_update: {mkolupdateelement update = Moffline. getupdateinfo (State );  // Mtext. settext (string. Format ("% s: % d %", update. cityname, update. ratio ));  }  Break  ;  Case  Mkofflinemap. type_new_offline: log. D ( "Offlinedemo", String. Format ("add offlinemap num: % d" , State ));  Break  ;  Case  Mkofflinemap. type_ver_update: log. D ( "Offlinedemo", String. Format ("New offlinemap Ver"));  Break  ;}}});  /**  Offline map import offline package *  */          Int Num = Moffline. Scan ();  //  If (num! = 0) mtext. settext (string. Format ("% d offline packages installed", num ));  } @ Override  Protected   Boolean Isroutedisplayed (){  Return   False  ;} @ Override  Protected   Void  Ondestroy (){  If (Mbmapman! = Null  ) {Mbmapman. Destroy (); mbmapman = Null  ;}  Super  . Ondestroy () ;}@ override Protected   Void  Onpause (){  If (Mbmapman! = Null  ) {Mbmapman. Stop ();}  Super  . Onpause () ;}@ override  Protected   Void  Onresume (){  If (Mbmapman! = Null  ) {Mbmapman. Start ();} Super  . Onresume ();}  }