Use of Baidu map under Android Studio (2) -- positioning service, androidstudio

Use of Baidu map under Android Studio (2) -- positioning service, androidstudio

In the previous chapter (http://www.cnblogs.com/jerehedu/p/4891216.html) we have completed the establishment of the environment, this chapter we will study how to use.

Step 1: Add the following permissions to the xml file:

<Uses-permission android: name = "android. permission. INTERNET "/> <uses-permission android: name =" com. android. launcher. permission. READ_SETTINGS "/> <uses-permission android: name =" android. permission. WAKE_LOCK "/> <uses-permission android: name =" android. permission. CHANGE_WIFI_STATE "/> <uses-permission android: name =" android. permission. ACCESS_WIFI_STATE "/> <uses-permission android: name =" android. permission. WRITE_EXTERNAL_STORAGE "/> <uses-permission android: name =" android. permission. WRITE_SETTINGS "/> <! -- This permission is used for network positioning --> <uses-permission android: name = "android. permission. ACCESS_COARSE_LOCATION"/> <! -- This permission is used to access GPS positioning --> <uses-permission android: name = "android. permission. ACCESS_FINE_LOCATION"/> <! -- Used to access Wi-Fi network information. wifi information is used to locate the network --> <uses-permission android: name = "android. permission. ACCESS_WIFI_STATE"/> <! -- Obtains carrier information, which is used to support interfaces related to carrier information --> <uses-permission android: name = "android. permission. ACCESS_NETWORK_STATE"/> <! -- This permission is used to obtain the permission for wifi, And wifi information is used to locate the network --> <uses-permission android: name = "android. permission. CHANGE_WIFI_STATE"/> <! -- Used to read the current status of the mobile phone --> <uses-permission android: name = "android. permission. READ_PHONE_STATE"/> <! -- Write extended storage and write data to the expansion card to write offline positioning data --> <uses-permission android: name = "android. permission. WRITE_EXTERNAL_STORAGE"/> <! -- Access the network and access the INTERNET to locate the network --> <uses-permission android: name = "android. permission. INTERNET"/> <! -- SD card read permission, users write offline positioning data --> <uses-permission android: name = "android. permission. MOUNT_UNMOUNT_FILESYSTEMS"/> <! -- Allow applications to read low-level system log files --> <uses-permission android: name = "android. permission. READ_LOGS "/> <uses-permission android: name =" android. permission. INTERNET "/> <uses-permission android: name =" com. android. launcher. permission. READ_SETTINGS "/> <uses-permission android: name =" android. permission. WAKE_LOCK "/> <uses-permission android: name =" android. permission. CHANGE_WIFI_STATE "/> <uses-permission android: name =" andro Id. permission. ACCESS_WIFI_STATE "/> <uses-permission android: name =" android. permission. WRITE_EXTERNAL_STORAGE "/> <uses-permission android: name =" android. permission. WRITE_SETTINGS "/> <! -- This permission is used for network positioning --> <uses-permission android: name = "android. permission. ACCESS_COARSE_LOCATION"/> <! -- This permission is used to access GPS positioning --> <uses-permission android: name = "android. permission. ACCESS_FINE_LOCATION"/> <! -- Used to access Wi-Fi network information. wifi information is used to locate the network --> <uses-permission android: name = "android. permission. ACCESS_WIFI_STATE"/> <! -- Obtains carrier information, which is used to support interfaces related to carrier information --> <uses-permission android: name = "android. permission. ACCESS_NETWORK_STATE"/> <! -- This permission is used to obtain the permission for wifi, And wifi information is used to locate the network --> <uses-permission android: name = "android. permission. CHANGE_WIFI_STATE"/> <! -- Used to read the current status of the mobile phone --> <uses-permission android: name = "android. permission. READ_PHONE_STATE"/> <! -- Write extended storage and write data to the expansion card to write offline positioning data --> <uses-permission android: name = "android. permission. WRITE_EXTERNAL_STORAGE"/> <! -- Access the network and access the INTERNET to locate the network --> <uses-permission android: name = "android. permission. INTERNET"/> <! -- SD card read permission, users write offline positioning data --> <uses-permission android: name = "android. permission. MOUNT_UNMOUNT_FILESYSTEMS"/> <! -- Allow applications to read low-level system log files --> <uses-permission android: name = "android. permission. READ_LOGS"/>

Step 2: Add a map control to the layout File

<LinearLayout xmlns: android = "http://schemas.android.com/apk/res/android" xmlns: tools = "http://schemas.android.com/tools" android: layout_width = "match_parent" android: layout_height = "match_parent" android: orientation = "vertical" tools: context = ". mainActivity "> <TextView android: text =" Baidu map "android: layout_width =" match_parent "android: gravity =" center "android: layout_height =" wrap_content "android: textSize = "25sp" android: id = "@ + id/textView"/> <com. baidu. mapapi. map. mapView android: id = "@ + id/baiDuMv" android: layout_width = "match_parent" android: layout_height = "match_parent" android: clickable = "true"/> </LinearLayout>

Step 3: add the initialization statement to the OnCreate method of the Activity.

// This method implements SDKInitializer. initialize (getApplicationContext () before setContentView ());

Step 4: Add lifecycle management to save money.

@ Override protected void onStop () {locationClient. stop (); super. onStop () ;}@ Override protected void onDestroy () {super. onDestroy (); // execute mMapView when onDestroy is executed in activity. onDestroy () mMapView. onDestroy (); mMapView = null;} @ Override protected void onResume () {super. onResume (); // execute mMapView when onResume is executed in the activity. onResume () mMapView. onResume () ;}@ Override protected void onPause () {super. onPause (); // execute mMapView when onPause is executed in activity. onPause () mMapView. onPause ();}

:

The complete code is as follows:

Package com. jerehedu. administrator. baidumapapplication; import android. app. activity; import android. OS. bundle; import android. view. menu; import android. view. menuItem; import com. baidu. location. BDLocation; import com. baidu. location. BDLocationListener; import com. baidu. location. locationClient; import com. baidu. location. locationClientOption; import com. baidu. mapapi. SDKInitializer; import com. baidu. mapapi. map. ba IduMap; import com. baidu. mapapi. map. bitmapDescriptor; import com. baidu. mapapi. map. bitmapDescriptorFactory; import com. baidu. mapapi. map. mapStatusUpdate; import com. baidu. mapapi. map. mapStatusUpdateFactory; import com. baidu. mapapi. map. mapView; import com. baidu. mapapi. map. myLocationConfigeration; import com. baidu. mapapi. map. myLocationData; import com. baidu. mapapi. model. latLng; public class MainActivity extends Activity {private MapView mMapView; private LocationClient locationClient; private BaiduMap baiduMap; private boolean firstLocation; private BitmapDescriptor mCurrentMarker; private parameter config; @ Override protected void onCreate (Bundle privilege) {super. onCreate (savedInstanceState); // This method must be implemented before the setContentView method. initialize (getApplicationContext (); setCo NtentView (R. layout. activity_main); mMapView = (MapView) findViewById (R. id. baiDuMv); baiduMap = mMapView. getMap (); MapStatusUpdate msu = MapStatusUpdateFactory. zoomTo (15f); baiduMap. setMapStatus (msu); // positioning initialization locationClient = new LocationClient (this); firstLocation = true; // you can specify the LocationClientOption option for the LocationClientOption (); option. setLocationMode (LocationClientOption. locationMode. H Ight_Accuracy); option. setOpenGps (true); option. setCoorType ("bd09ll"); // sets the coordinate type option. setScanSpan (1000); locationClient. setLocOption (option); // set the custom icon BitmapDescriptor myMarker = BitmapDescriptorFactory. fromResource (R. drawable. navi_map); MyLocationConfigeration config = new MyLocationConfigeration (MyLocationConfigeration. locationMode. FOLLOWING, true, myMarker); locationClient. registerlow.o NListener (new BDLocationListener () {@ Override public void onReceiveLocation (BDLocation location) {// After map view is destroyed, if (location = null | mMapView = null) return is not processed at the newly received location; // construct the location data MyLocationData locData = new MyLocationData. builder (). accuracy (location. getRadius () // set the direction information obtained by the developer, Which is 0-360 clockwise. direction (100 ). latitude (location. getLatitude ()). longpolling (location. getlongpolling ()). build (); // set Bit Data baiduMap. setMyLocationData (locData); // when positioning for the first time, move the map location to the current location if (firstLocation) {firstLocation = false; LatLng xy = new LatLng (location. getLatitude (), location. getlongpolling (); MapStatusUpdate status = MapStatusUpdateFactory. newLatLng (xy); baiduMap. animateMapStatus (status) ;}}) ;}@ Override protected void onStart () {// to display the position icon, you must enable the layer to locate the baiduMap. setMyLocationEnabled (true); if (! LocationClient. isStarted () {locationClient. start ();} super. onStart () ;}@ Override protected void onStop () {// close the layer to locate the baiduMap. setMyLocationEnabled (false); locationClient. stop (); super. onStop () ;}@ Override protected void onDestroy () {super. onDestroy (); // execute mMapView when onDestroy is executed in activity. onDestroy () mMapView. onDestroy (); mMapView = null;} @ Override protected void onResume () {super. onResume (); // execute mMapView when onResume is executed in the activity. onResume () mMapView. onResume () ;}@ Override protected void onPause () {super. onPause (); // execute mMapView when onPause is executed in activity. onPause () mMapView. onPause ();}}

In this way, the simple positioning and display functions are implemented. Of course, more functions need to be learned from the API documentation.

 

Author: Jerry Education
Source: http://www.cnblogs.com/jerehedu/
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