学习目的：1.LBS(基于位置的服务)确定用户位置的两种方式（GPS 网络定位(手机与各基站的距离算出位置)）
使用百度定位 准备LBS SDK http://lbsyun.baidu.com/sdk/download
androidMainifest.xml1
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34<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.lbstest">
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE"/>
<uses-permission android:name="android.permission.READ_PHONE_STATE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>
<uses-permission android:name="android.permission.WAKE_LOCK"/>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<meta-data
android:name="com.baidu.lbsapi.API_KEY"
android:value="i6VD2fHKM3msMfZtIOXAhFSzDiYGFIwL" />
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<service android:name="com.baidu.location.f" android:enabled="true" android:process=":remote">
</service>
</application>
</manifest>
MainActivity1
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83public class MainActivity extends AppCompatActivity {
public LocationClient mLocationClient;
private TextView positionText;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mLocationClient = new LocationClient(getApplicationContext());//LocationClient实例创建Context参数
mLocationClient.registerLocationListener(new MyLocationListener());//注册一个监听器 当获取到位置信息就会回调这个监听器
setContentView(R.layout.activity_main);
positionText = (TextView) findViewById(R.id.position_text_view);
List<String> permissionList = new ArrayList<>();//创建List集合 没有授权的权限加入到List中
if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
permissionList.add(Manifest.permission.ACCESS_FINE_LOCATION);
}
if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.READ_PHONE_STATE) != PackageManager.PERMISSION_GRANTED) {
permissionList.add(Manifest.permission.READ_PHONE_STATE);
}
if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
permissionList.add(Manifest.permission.WRITE_EXTERNAL_STORAGE);
}
if (!permissionList.isEmpty()) {
String [] permissions = permissionList.toArray(new String[permissionList.size()]);
ActivityCompat.requestPermissions(MainActivity.this, permissions, 1);
} else {
requestLocation();
}
}
private void requestLocation() {
mLocationClient.start();
}
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
switch (requestCode) {
case 1:
if (grantResults.length > 0) {
for (int result : grantResults) {
if (result != PackageManager.PERMISSION_GRANTED) {
Toast.makeText(this, "必须同意所有权限才能使用本程序", Toast.LENGTH_SHORT).show();
finish();
return;
}
}
requestLocation();
} else {
Toast.makeText(this, "发生未知错误", Toast.LENGTH_SHORT).show();
finish();
}
break;
default:
}
}
public class MyLocationListener implements BDLocationListener {
public void onReceiveLocation(BDLocation location) {
StringBuilder currentPosition = new StringBuilder();
currentPosition.append("定位方式：");
if (location.getLocType() == BDLocation.TypeGpsLocation) {
currentPosition.append("GPS");
} else if (location.getLocType() == BDLocation.TypeNetWorkLocation) {
currentPosition.append("网络");
}
positionText.setText(currentPosition);
}
}
}
问题:LocationClient的start()只会定位一次 快速移动定位需要LBS SDK提供的方法
MainActivity中添加1
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19private void requestLocation() {
initLocation();
mLocationClient.start();
}
private void initLocation(){
LocationClientOption option = new LocationClientOption();//更新的间隔
option.setScanSpan(5000);
mLocationClient.setLocOption(option);
}
protected void onDestroy() {
super.onDestroy();
mLocationClient.stop();//停止定位
}
强制指定GPS进行定位1
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6private void initLocation(){
LocationClientOption option = new LocationClientOption();
option.setLocationMode(LocationClientOption.LocationMode.Device_Sensors);
mLocationClient.setLocOption(option);
}
到此，位置信息以文本显示
具体化位置信息1
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34private void initLocation(){
LocationClientOption option = new LocationClientOption();
option.setScanSpan(5000);
option.setIsNeedAddress(true);
mLocationClient.setLocOption(option);
}
public class MyLocationListener implements BDLocationListener {
public void onReceiveLocation(BDLocation location) {
StringBuilder currentPosition = new StringBuilder();
currentPosition.append("纬度：").append(location.getLatitude()).append("\n");
currentPosition.append("经线：").append(location.getLongitude()).append("\n");
currentPosition.append("国家：").append(location.getCountry()).append("\n");
currentPosition.append("省：").append(location.getProvince()).append("\n");
currentPosition.append("市：").append(location.getCity()).append("\n");
currentPosition.append("区：").append(location.getDistrict()).append("\n");
currentPosition.append("街道：").append(location.getStreet()).append("\n");
currentPosition.append("定位方式：");
if (location.getLocType() == BDLocation.TypeGpsLocation) {
currentPosition.append("GPS");
} else if (location.getLocType() == BDLocation.TypeNetWorkLocation) {
currentPosition.append("网络");
}
positionText.setText(currentPosition);
if (location.getLocType() == BDLocation.TypeGpsLocation
|| location.getLocType() == BDLocation.TypeNetWorkLocation) {
navigateTo(location);
}
}
}
到此，位置信息以文本显示
使用百度地图(显示地图)1
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11<TextView
android:id="@+id/position_text_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:visibility="gone" />
<com.baidu.mapapi.map.MapView
android:id="@+id/bmapView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:clickable="true" />
修改MainActivity1
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175public class MainActivity extends AppCompatActivity {
private MapView mapView;
//...
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mLocationClient = new LocationClient(getApplicationContext());
mLocationClient.registerLocationListener(new MyLocationListener());
SDKInitializer.initialize(getApplicationContext());
setContentView(R.layout.activity_main);
mapView = (MapView) findViewById(R.id.bmapView);
//...
}
//...
protected void onResume() {
super.onResume();
mapView.onResume();
}
protected void onPause() {
super.onPause();
mapView.onPause();
}
protected void onDestroy() {
super.onDestroy();
mLocationClient.stop();
mapView.onDestroy();
baiduMap.setMyLocationEnabled(false);
}
//...
}
```
移动到我的位置(BaiduMap类 地图的总控制器)
```java
public class MainActivity extends AppCompatActivity {
public LocationClient mLocationClient;
private TextView positionText;
private MapView mapView;
private BaiduMap baiduMap;
private boolean isFirstLocate = true;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mLocationClient = new LocationClient(getApplicationContext());
mLocationClient.registerLocationListener(new MyLocationListener());
SDKInitializer.initialize(getApplicationContext());
setContentView(R.layout.activity_main);
mapView = (MapView) findViewById(R.id.bmapView);
baiduMap = mapView.getMap();
baiduMap.setMyLocationEnabled(true);
positionText = (TextView) findViewById(R.id.position_text_view);
List<String> permissionList = new ArrayList<>();
if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
permissionList.add(Manifest.permission.ACCESS_FINE_LOCATION);
}
if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.READ_PHONE_STATE) != PackageManager.PERMISSION_GRANTED) {
permissionList.add(Manifest.permission.READ_PHONE_STATE);
}
if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
permissionList.add(Manifest.permission.WRITE_EXTERNAL_STORAGE);
}
if (!permissionList.isEmpty()) {
String [] permissions = permissionList.toArray(new String[permissionList.size()]);
ActivityCompat.requestPermissions(MainActivity.this, permissions, 1);
} else {
requestLocation();
}
}
private void navigateTo(BDLocation location) {
if (isFirstLocate) {
Toast.makeText(this, "nav to " + location.getAddrStr(), Toast.LENGTH_SHORT).show();
LatLng ll = new LatLng(location.getLatitude(), location.getLongitude());
MapStatusUpdate update = MapStatusUpdateFactory.newLatLng(ll);
baiduMap.animateMapStatus(update);
update = MapStatusUpdateFactory.zoomTo(16f);
baiduMap.animateMapStatus(update);
isFirstLocate = false;
}
MyLocationData.Builder locationBuilder = new MyLocationData.
Builder();
locationBuilder.latitude(location.getLatitude());
locationBuilder.longitude(location.getLongitude());
MyLocationData locationData = locationBuilder.build();
baiduMap.setMyLocationData(locationData);
}
private void requestLocation() {
initLocation();
mLocationClient.start();
}
private void initLocation(){
LocationClientOption option = new LocationClientOption();
option.setScanSpan(5000);
option.setIsNeedAddress(true);
mLocationClient.setLocOption(option);
}
protected void onResume() {
super.onResume();
mapView.onResume();
}
protected void onPause() {
super.onPause();
mapView.onPause();
}
protected void onDestroy() {
super.onDestroy();
mLocationClient.stop();
mapView.onDestroy();
baiduMap.setMyLocationEnabled(false);
}
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
switch (requestCode) {
case 1:
if (grantResults.length > 0) {
for (int result : grantResults) {
if (result != PackageManager.PERMISSION_GRANTED) {
Toast.makeText(this, "必须同意所有权限才能使用本程序", Toast.LENGTH_SHORT).show();
finish();
return;
}
}
requestLocation();
} else {
Toast.makeText(this, "发生未知错误", Toast.LENGTH_SHORT).show();
finish();
}
break;
default:
}
}
public class MyLocationListener implements BDLocationListener {
public void onReceiveLocation(BDLocation location) {
if (location.getLocType() == BDLocation.TypeGpsLocation
|| location.getLocType() == BDLocation.TypeNetWorkLocation) {
navigateTo(location);
}
}
}
}