Android Baidu map API usage tutorial, androidapi

Android Baidu map API usage tutorial, androidapi
Import warehouse receiving File

Download the latest library file on the download page. Copy the liblocSDK2.4.so file to the libs/armeabi directory. Copy the locSDK2.4.jar file to the project root directory, select "Add JARs" from Project Properties> Java Build Path> Libraries, select locSDK2.4.jar, and return the result after confirmation. In this way, you can use Baidu positioning API in the program.

Set AndroidManifest. xml

To differentiate services of Version 2.3, you must declare the intent filter in the manifest file as com. baidu. location. service_v2.4 and declare the service component in the application tag.

 
 

  
  
<service android:name="com.baidu.location.f" android:enabled="true" android:process=":remote" 
  
  
android:permission="android.permission.BAIDU_LOCATION_SERVICE">
  
  
 <intent-filter>
  
  
 <action android:name="com.baidu.location.service_v2.4"></action>
  
  
 </intent-filter>
  
  
</service>
 
 

Declare permission

 
 

  
  
<permission android:name="android.permission.BAIDU_LOCATION_SERVICE"></permission>
  
  
<uses-permission android:name="android.permission.BAIDU_LOCATION_SERVICE"></uses-permission>
  
  
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"></uses-permission>
  
  
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"></uses-permission>
  
  
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"></uses-permission>
  
  
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"></uses-permission>
  
  
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE"></uses-permission>
  
  
<uses-permission android:name="android.permission.READ_PHONE_STATE"></uses-permission>
  
  
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>
  
  
<uses-permission android:name="android.permission.INTERNET" />
  
  
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"></uses-permission>
  
  
<uses-permission android:name="android.permission.READ_LOGS"></uses-permission>
 
 

Import-related classes

 
 

  
  
ImportCom. baidu. location. BDLocation;
  
  
ImportCom. baidu. location. BDLocationListener;
  
  
ImportCom. baidu. location. LocationClient;
  
  
ImportCom. baidu. location. LocationClientOption;
  
  
ImportCom. baidu. location. bdpolicylistener;// If the location reminder function is used, the import class is required.
 
 

Use of function classes to initialize the LocationClient class

Note that the LocationClient class must be declared in the main thread. Parameters of the Context type are required.

 
 

  
  
PublicLocationClient mLocationClient =Null;
  
  
PublicBDLocationListener myListener =NewMyLocationListener ();
  
  
 
  
  
Public VoidOnCreate (){
  
  
MLocationClient =NewLocationClient (This);// Declare the LocationClient class
  
  
MLocationClient. registerLocationListener (myListener );// Register the listener Function
  
  
}
 
 

Implement the BDLocationListener Interface

The BDLocationListener interface has two methods to implement:
1. Receive the location result returned asynchronously. The parameter is a BDLocation parameter.
2. Receive the result of the POI query returned asynchronously. The parameter is a BDLocation parameter.

 
 

  
  
public class MyLocationListenner implements BDLocationListener {
  
  
 @Override
  
  
 public void onReceiveLocation(BDLocation location) {
  
  
 if (location == null)
  
  
 return ;
  
  
 StringBuffer sb = new StringBuffer(256);
  
  
 sb.append("time : ");
  
  
 sb.append(location.getTime());
  
  
 sb.append("\nerror code : ");
  
  
 sb.append(location.getLocType());
  
  
 sb.append("\nlatitude : ");
  
  
 sb.append(location.getLatitude());
  
  
 sb.append("\nlontitude : ");
  
  
 sb.append(location.getLongitude());
  
  
 sb.append("\nradius : ");
  
  
 sb.append(location.getRadius());
  
  
 if (location.getLocType() == BDLocation.TypeGpsLocation){
  
  
 sb.append("\nspeed : ");
  
  
 sb.append(location.getSpeed());
  
  
 sb.append("\nsatellite : ");
  
  
 sb.append(location.getSatelliteNumber());
  
  
 } else if (location.getLocType() == BDLocation.TypeNetWorkLocation){
  
  
 sb.append("\naddr : ");
  
  
 sb.append(location.getAddrStr());
  
  
 } 
  
  
 
  
  
 logMsg(sb.toString());
  
  
 }
  
  
public void onReceivePoi(BDLocation poiLocation) {
  
  
 if (poiLocation == null){
  
  
 return ;
  
  
 }
  
  
 StringBuffer sb = new StringBuffer(256);
  
  
 sb.append("Poi time : ");
  
  
 sb.append(poiLocation.getTime());
  
  
 sb.append("\nerror code : ");
  
  
 sb.append(poiLocation.getLocType());
  
  
 sb.append("\nlatitude : ");
  
  
 sb.append(poiLocation.getLatitude());
  
  
 sb.append("\nlontitude : ");
  
  
 sb.append(poiLocation.getLongitude());
  
  
 sb.append("\nradius : ");
  
  
 sb.append(poiLocation.getRadius());
  
  
 if (poiLocation.getLocType() == BDLocation.TypeNetWorkLocation){
  
  
 sb.append("\naddr : ");
  
  
 sb.append(poiLocation.getAddrStr());
  
  
 } 
  
  
 if(poiLocation.hasPoi()){
  
  
 sb.append("\nPoi:");
  
  
 sb.append(poiLocation.getPoi());
  
  
 }else{ 
  
  
 sb.append("noPoi information");
  
  
 }
  
  
 logMsg(sb.toString());
  
  
 }
  
  
}
 
 

Set parameters

Positioning parameters include: positioning mode (single positioning, timed positioning), return coordinate type, and whether to enable GPS. Eg:

 
 

  
  
LocationClientOption option =NewLocationClientOption ();
  
  
Option. setOpenGps (True);
  
  
Option. setAddrType ("detail ");
  
  
Option. setCoorType ("gcj02 ");
  
  
Option. setScanSpan (5000 );
  
  
Option. disableCache (True);// Disable cache locating
  
  
Option. setPoiNumber (5 );// Maximum number of POI returned
  
  
Option. setPoiDistance (1000 );// Poi query distance
  
  
Option. setPoiExtraInfo (True);// Whether POI's phone number, address, and other details are required
  
  
MLocClient. setLocOption (option );
 
 

Initiate a location request

Initiate a location request. The request process is asynchronous and the positioning result is obtained in the oncancelocation listener.

 
 

  
  
if (mLocClient != null && mLocClient.isStarted())
  
  
 mLocClient.requestLocation();
  
  
else 
  
  
 Log.d("LocSDK_2.0_Demo1", "locClient is null or not started");
 
 

Initiate a POI query request

Initiate a POI query request. The request process is asynchronous. The positioning result is obtained in the onReceivePoi listener.

 
 

  
  
if (mLocClient != null && mLocClient.isStarted())
  
  
 mLocClient.requestPoi();
 
 

Location reminder

The location reminder can be sent three times at most, and will not be sent after three times. If you need to remind you again or modify the coordinates of the reminder point, you can use the setpolicylocation () function.

 
 

  
  
// Location reminder code
  
  
M1_yer =NewNotifyLister ();
  
  
MNotifyer. SetNotifyLocation (42.03249652949337, 113.3129895882556, 3000, "gps ");// The four parameters represent the coordinates of the points to be reminded. The specific meanings are: latitude, longitude, distance range, and coordinate system type (gcj02, gps, bd09, bd09ll)
  
  
MLocationClient. registerpolicy (mationyer );
  
  
// After registering the location reminder listening event, you can use setpolicylocation to modify the location reminder settings, which will take effect immediately after modification.
 
 

 
 

  
  
// BDNotifyListner implementation
  
  
Public ClassNotifyListerExtendsBDNotifyListener {
  
  
 Public VoidOnNotify (BDLocation mlocation,FloatDistance ){
  
  
MVibrator01.vibrate (1000 );// The vibration reminder has reached the specified position
  
  
}
  
  
}
 
 

 
 

  
  
// Cancel the location reminder
  
  
MLocationClient. removeNotifyEvent (mNotifyer );