1. Add positioning permissions to the AndroidManifest.xml file:
2, create a sensor class, the code is as follows
package com.example.baidumap;
import android.content.Context;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
public class MyOrientationListener implements SensorEventListener {
private SensorManager mSensorManager;
private Context mContext;
private Sensor mSensor;
private float lastX;
public MyOrientationListener(Context context){
this.mContext = context;
}
@SuppressWarnings("deprecation")
public void start(){
mSensorManager = (SensorManager) mContext
.getSystemService(Context.SENSOR_SERVICE);
if (mSensorManager != null){
// get direction sensor
mSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_ORIENTATION);
}
if (mSensor != null){
mSensorManager.registerListener(this, mSensor,
SensorManager.SENSOR_DELAY_UI);
}
}
public void stop(){
mSensorManager.unregisterListener(this);
}
@Override
public void onAccuracyChanged(Sensor arg0, int arg1){
// TODO Auto-generated method stub
}
@SuppressWarnings({ "deprecation" })
@Override
public void onSensorChanged(SensorEvent event){
if (event.sensor.getType() == Sensor.TYPE_ORIENTATION)
{
float x = event.values[SensorManager.DATA_X];
if (Math.abs(x-lastX)> 1.0)
{
if (mOnOrientationListener != null)
{
mOnOrientationListener.onOrientationChanged(x);
}
}
lastX = x;
}
}
private OnOrientationListener mOnOrientationListener;
public void setOnOrientationListener(OnOrientationListener mOnOrientationListener){
this.mOnOrientationListener = mOnOrientationListener;
}
public interface OnOrientationListener{
void onOrientationChanged(float x);
}
}
3. Add a positioning button to the layout file
< div class="Highlighter">
4. Add resource files (the original location of the picture is in my Baidu cloud disk (extract code: k5b7) In the compressed package assets, take them and put them in the following files respectively)
5. MainActivity code (note: MainActivity inherits iew.OnClickListener interface)
package com.example.baidumap;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Context;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
import com.baidu.location.BDAbstractLocationListener;
import com.baidu.location.BDLocation;
import com.baidu.location.LocationClient;
import com.baidu.location.LocationClientOption;
import com.baidu.mapapi.CoordType;
import com.baidu.mapapi.SDKInitializer;
import com.baidu.mapapi.map.BaiduMap;
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.MyLocationConfiguration;
import com.baidu.mapapi.map.MyLocationData;
import com.baidu.mapapi.model.LatLng;
public class MainActivity extends AppCompatActivity implements View.OnClickListener{
private Context context;
private MapView mapView = null;
private BaiduMap baiduMap = null;
//Positioning related
private double mLatitude;
private double mLongtitude;
private MyOrientationListener myOrientationListener; //Orientation sensor
private float mCurrentx;
//Custom icon
private BitmapDescriptor mIconLocation;
private LocationClient mLocationClient;
public BDAbstractLocationListener myListener;
private LatLng mLastLocationData;
private boolean isFirstin = true;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
SDKInitializer.initialize(getApplicationContext());
setContentView(R.layout.activity_main);
SDKInitializer.setCoordType(CoordType.BD09LL);
this.context = this;
mapView = (MapView)findViewById(R.id.baiduMapView);
baiduMap = mapView.getMap(); //Get map control reference
initLocation();
button();
}
@Override
protected void onStart() {
super.onStart();
baiduMap.setMyLocationEnabled(true); //Enable positioning
if (!mLocationClient.isStarted())mLocationClient.start();
myOrientationListener.start(); //Turn on the orientation sensor
}
@Override
protected void onResume() {
super.onResume();
mapView.onResume();
}
@Override
protected void onPause() {
super.onPause();
mapView.onPause();
}
@Override
protected void onStop() {
super.onStop();
baiduMap.setMyLocationEnabled(false); //Stop positioning
mLocationClient.stop();
myOrientationListener.stop(); //Stop the orientation sensor
}
@Override
protected void onDestroy() {
super.onDestroy();
baiduMap.setMyLocationEnabled(false);
mapView.onDestroy();
mapView = null;
}
@Override
public void onClick(View view) {
SDKInitializer.initialize(getApplicationContext());
switch (view.getId()) {
case R.id.btn_Location: {
centerToMyLocation(mLatitude, mLongtitude);
break;
}
}
}
//Button response
private void button() {
Button btn_lco = (Button) findViewById(R.id.btn_Location); //Button
btn_lco.setOnClickListener(this); //Button processing
}
//position
private class MyLocationListener extends BDAbstractLocationListener {
@Override
public void onReceiveLocation(BDLocation location) {
//mapView is not processing the newly received position after being destroyed
if (location == null || mapView == null){
return;
}
MyLocationData locData = new MyLocationData.Builder()
.accuracy(location.getRadius())
// Set the direction information obtained by the developer here, clockwise 0-360
.direction(mCurrentx).latitude(location.getLatitude())
.longitude(location.getLongitude()).build();
baiduMap.setMyLocationData(locData);
//Set custom icon
MyLocationConfiguration config = new MyLocationConfiguration(MyLocationConfiguration.LocationMode.NORMAL, true, mIconLocation);
baiduMap.setMyLocationConfiguration(config);
//Update the latitude and longitude
mLatitude = location.getLatitude();
mLongtitude = location.getLongitude();
//Set the starting point
mLastLocationData = new LatLng(mLatitude, mLongtitude);
if (isFirstin) {
centerToMyLocation(location.getLatitude(), location.getLongitude());
if (location.getLocType() == BDLocation.TypeGpsLocation) {
// GPS positioning results
Toast.makeText(context, "Location:"+location.getAddrStr(), Toast.LENGTH_SHORT).show();
} else if (location.getLocType() == BDLocation.TypeNetWorkLocation) {
// Network positioning results
Toast.makeText(context, "Location:"+location.getAddrStr(), Toast.LENGTH_SHORT).show();
} else if (location.getLocType() == BDLocation.TypeOffLineLocation) {
// Offline positioning result
Toast.makeText(context, "Location:"+location.getAddrStr(), Toast.LENGTH_SHORT).show();
} else if (location.getLocType() == BDLocation.TypeServerError) {
Toast.makeText(context, "Locating: Server Error", Toast.LENGTH_SHORT).show();
} else if (location.getLocType() == BDLocation.TypeNetWorkException) {
Toast.makeText(context, "Locating: Network Error", Toast.LENGTH_SHORT).show();
} else if (location.getLocType() == BDLocation.TypeCriteriaException) {
Toast.makeText(context, "Positioning: The phone mode is wrong, please check if you are flying", Toast.LENGTH_SHORT).show();
}
isFirstin = false;
}
}
}
//Initialize positioning
private void initLocation() {
//Zoom the map
MapStatusUpdate msu = MapStatusUpdateFactory.zoomTo(15.0f);
baiduMap.setMapStatus(msu);
//Turn on positioning
baiduMap.setMyLocationEnabled(true);
//Declare the LocationClient class
mLocationClient = new LocationClient(this);
//Set LocationClient related parameters through LocationClientOption
LocationClientOption option = new LocationClientOption();
option.setOpenGps(true); // Open gps
option.setCoorType("bd09ll"); // Set the coordinate type
option.setIsNeedAddress(true);//Set whether address information is required
option.setScanSpan(1000);
//Set locationClientOption
mLocationClient.setLocOption(option);
myListener = new MyLocationListener();
//Register the listener function
mLocationClient.registerLocationListener(myListener);
//Initialize icon
mIconLocation = BitmapDescriptorFactory.fromResource(R.drawable.navi_map_gps);
initOrientation();
//Start positioning
mLocationClient.start();
}
//Back to the positioning center
private void centerToMyLocation(double latitude, double longtitude) {
baiduMap.clear();
mLastLocationData = new LatLng(latitude, longtitude);
MapStatusUpdate msu = MapStatusUpdateFactory.newLatLng(mLastLocationData);
baiduMap.animateMapStatus(msu);
}
//sensor
private void initOrientation() {
//sensor
myOrientationListener = new MyOrientationListener(context);
myOrientationListener.setOnOrientationListener(new MyOrientationListener.OnOrientationListener() {
@Override
public void onOrientationChanged(float x) {
mCurrentx = x;
}
});
}
}
6. Start the project
7. Attach the items of this chapter (extract code: jl2v).
package com.example.baidumap;
import android.content.Context;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
public class MyOrientationListener implements SensorEventListener {
private SensorManager mSensorManager;
private Context mContext;
private Sensor mSensor;
private float lastX;
public MyOrientationListener(Context context){
this.mContext = context;
}
@SuppressWarnings("deprecation")
public void start(){
mSensorManager = (SensorManager) mContext
.getSystemService(Context.SENSOR_SERVICE);
if (mSensorManager != null){
// get direction sensor
mSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_ORIENTATION);
}
if (mSensor != null){
mSensorManager.registerListener(this, mSensor,
SensorManager.SENSOR_DELAY_UI);
}
}
public void stop(){
mSensorManager.unregisterListener(this);
}
@Override
public void onAccuracyChanged(Sensor arg0, int arg1){
// TODO Auto-generated method stub
}
@SuppressWarnings({ "deprecation" })
@Override
public void onSensorChanged(SensorEvent event){
if (event.sensor.getType() == Sensor.TYPE_ORIENTATION)
{
float x = event.values[SensorManager.DATA_X];
if (Math.abs(x-lastX)> 1.0)
{
if (mOnOrientationListener != null)
{
mOnOrientationListener.onOrientationChanged(x);
}
}
lastX = x;
}
}
private OnOrientationListener mOnOrientationListener;
public void setOnOrientationListener(OnOrientationListener mOnOrientationListener){
this.mOnOrientationListener = mOnOrientationListener;
}
public interface OnOrientationListener{
void onOrientationChanged(float x);
}
}
package com.example.baidumap;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Context;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
import com.baidu.location.BDAbstractLocationListener;
import com.baidu.location.BDLocation;
import com.baidu.location.LocationClient;
import com.baidu.location.LocationClientOption;
import com.baidu.mapapi.CoordType;
import com.baidu.mapapi.SDKInitializer;
import com.baidu.mapapi.map.BaiduMap;
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.MyLocationConfiguration;
import com.baidu.mapapi.map.MyLocationData;
import com.baidu.mapapi.model.LatLng;
public class MainActivity extends AppCompatActivity implements View.OnClickListener{
private Context context;
private MapView mapView = null;
private BaiduMap baiduMap = null;
//Positioning related
private double mLatitude;
private double mLongtitude;
private MyOrientationListener myOrientationListener; //Orientation sensor
private float mCurrentx;
//Custom icon
private BitmapDescriptor mIconLocation;
private LocationClient mLocationClient;
public BDAbstractLocationListener myListener;
private LatLng mLastLocationData;
private boolean isFirstin = true;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
SDKInitializer.initialize(getApplicationContext());
setContentView(R.layout.activity_main);
SDKInitializer.setCoordType(CoordType.BD09LL);
this.context = this;
mapView = (MapView)findViewById(R.id.baiduMapView);
baiduMap = mapView.getMap(); //Get map control reference
initLocation();
button();
}
@Override
protected void onStart() {
super.onStart();
baiduMap.setMyLocationEnabled(true); //Enable positioning
if (!mLocationClient.isStarted())mLocationClient.start();
myOrientationListener.start(); //Turn on the orientation sensor
}
@Override
protected void onResume() {
super.onResume();
mapView.onResume();
}
@Override
protected void onPause() {
super.onPause();
mapView.onPause();
}
@Override
protected void onStop() {
super.onStop();
baiduMap.setMyLocationEnabled(false); //Stop positioning
mLocationClient.stop();
myOrientationListener.stop(); //Stop the orientation sensor
}
@Override
protected void onDestroy() {
super.onDestroy();
baiduMap.setMyLocationEnabled(false);
mapView.onDestroy();
mapView = null;
}
@Override
public void onClick(View view) {
SDKInitializer.initialize(getApplicationContext());
switch (view.getId()) {
case R.id.btn_Location: {
centerToMyLocation(mLatitude, mLongtitude);
break;
}
}
}
//Button response
private void button() {
Button btn_lco = (Button) findViewById(R.id.btn_Location); //Button
btn_lco.setOnClickListener(this); //Button processing
}
//position
private class MyLocationListener extends BDAbstractLocationListener {
@Override
public void onReceiveLocation(BDLocation location) {
//mapView is not processing the newly received position after being destroyed
if (location == null || mapView == null){
return;
}
MyLocationData locData = new MyLocationData.Builder()
.accuracy(location.getRadius())
// Set the direction information obtained by the developer here, clockwise 0-360
.direction(mCurrentx).latitude(location.getLatitude())
.longitude(location.getLongitude()).build();
baiduMap.setMyLocationData(locData);
//Set custom icon
MyLocationConfiguration config = new MyLocationConfiguration(MyLocationConfiguration.LocationMode.NORMAL, true, mIconLocation);
baiduMap.setMyLocationConfiguration(config);
//Update the latitude and longitude
mLatitude = location.getLatitude();
mLongtitude = location.getLongitude();
//Set the starting point
mLastLocationData = new LatLng(mLatitude, mLongtitude);
if (isFirstin) {
centerToMyLocation(location.getLatitude(), location.getLongitude());
if (location.getLocType() == BDLocation.TypeGpsLocation) {
// GPS positioning results
Toast.makeText(context, "Location:"+location.getAddrStr(), Toast.LENGTH_SHORT).show();
} else if (location.getLocType() == BDLocation.TypeNetWorkLocation) {
// Network positioning results
Toast.makeText(context, "Location:"+location.getAddrStr(), Toast.LENGTH_SHORT).show();
} else if (location.getLocType() == BDLocation.TypeOffLineLocation) {
// Offline positioning result
Toast.makeText(context, "Location:"+location.getAddrStr(), Toast.LENGTH_SHORT).show();
} else if (location.getLocType() == BDLocation.TypeServerError) {
Toast.makeText(context, "Locating: Server Error", Toast.LENGTH_SHORT).show();
} else if (location.getLocType() == BDLocation.TypeNetWorkException) {
Toast.makeText(context, "Locating: Network Error", Toast.LENGTH_SHORT).show();
} else if (location.getLocType() == BDLocation.TypeCriteriaException) {
Toast.makeText(context, "Positioning: The phone mode is wrong, please check if you are flying", Toast.LENGTH_SHORT).show();
}
isFirstin = false;
}
}
}
//Initialize positioning
private void initLocation() {
//Zoom the map
MapStatusUpdate msu = MapStatusUpdateFactory.zoomTo(15.0f);
baiduMap.setMapStatus(msu);
//Turn on positioning
baiduMap.setMyLocationEnabled(true);
//Declare the LocationClient class
mLocationClient = new LocationClient(this);
//Set LocationClient related parameters through LocationClientOption
LocationClientOption option = new LocationClientOption();
option.setOpenGps(true); // Open gps
option.setCoorType("bd09ll"); // Set the coordinate type
option.setIsNeedAddress(true);//Set whether address information is required
option.setScanSpan(1000);
//Set locationClientOption
mLocationClient.setLocOption(option);
myListener = new MyLocationListener();
//Register the listener function
mLocationClient.registerLocationListener(myListener);
//Initialize icon
mIconLocation = BitmapDescriptorFactory.fromResource(R.drawable.navi_map_gps);
initOrientation();
//Start positioning
mLocationClient.start();
}
//Back to the positioning center
private void centerToMyLocation(double latitude, double longtitude) {
baiduMap.clear();
mLastLocationData = new LatLng(latitude, longtitude);
MapStatusUpdate msu = MapStatusUpdateFactory.newLatLng(mLastLocationData);
baiduMap.animateMapStatus(msu);
}
//sensor
private void initOrientation() {
//sensor
myOrientationListener = new MyOrientationListener(context);
myOrientationListener.setOnOrientationListener(new MyOrientationListener.OnOrientationListener() {
@Override
public void onOrientationChanged(float x) {
mCurrentx = x;
}
});
}
}
