项目要实现跳入第三方APP实现导航功能，在APP内已经嵌入高德地图SDK,可以获取定位的经度。
坐标系的转换
要跳转到不同的地图，先要保证使用同一个坐标系统，不然会出现较大的偏移，地图APP坐标系统情况如下
| API | 坐标系 |
|---|---|
| 百度地图 | 百度坐标 |
| 腾讯搜搜地图 | 火星坐标 |
| 高德MapABC地图 | 火星坐标 |
| 搜狐搜狗地图 | 搜狗坐标 |
坐标体系说明，及转换可参考：http://blog.csdn.net/a13570320979/article/details/51366355
使用如下工具类，就可以进行坐标系的转换
public class GPSUtil {
public static double pi = 3.1415926535897932384626;
public static double x_pi = 3.14159265358979324 * 3000.0 / 180.0;
public static double a = 6378245.0;
public static double ee = 0.00669342162296594323;
public static double transformLat(double x, double y) {
double ret = -100.0 + 2.0 * x + 3.0 * y + 0.2 * y * y + 0.1 * x * y
+ 0.2 * Math.sqrt(Math.abs(x));
ret += (20.0 * Math.sin(6.0 * x * pi) + 20.0 * Math.sin(2.0 * x * pi)) * 2.0 / 3.0;
ret += (20.0 * Math.sin(y * pi) + 40.0 * Math.sin(y / 3.0 * pi)) * 2.0 / 3.0;
ret += (160.0 * Math.sin(y / 12.0 * pi) + 320 * Math.sin(y * pi / 30.0)) * 2.0 / 3.0;
return ret;
}
public static double transformLon(double x, double y) {
double ret = 300.0 + x + 2.0 * y + 0.1 * x * x + 0.1 * x * y + 0.1
* Math.sqrt(Math.abs(x));
ret += (20.0 * Math.sin(6.0 * x * pi) + 20.0 * Math.sin(2.0 * x * pi)) * 2.0 / 3.0;
ret += (20.0 * Math.sin(x * pi) + 40.0 * Math.sin(x / 3.0 * pi)) * 2.0 / 3.0;
ret += (150.0 * Math.sin(x / 12.0 * pi) + 300.0 * Math.sin(x / 30.0
* pi)) * 2.0 / 3.0;
return ret;
}
public static double[] transform(double lat, double lon) {
if (outOfChina(lat, lon)) {
return new double[]{lat,lon};
}
double dLat = transformLat(lon - 105.0, lat - 35.0);
double dLon = transformLon(lon - 105.0, lat - 35.0);
double radLat = lat / 180.0 * pi;
double magic = Math.sin(radLat);
magic = 1 - ee * magic * magic;
double sqrtMagic = Math.sqrt(magic);
dLat = (dLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * pi);
dLon = (dLon * 180.0) / (a / sqrtMagic * Math.cos(radLat) * pi);
double mgLat = lat + dLat;
double mgLon = lon + dLon;
return new double[]{mgLat,mgLon};
}
public static boolean outOfChina(double lat, double lon) {
if (lon < 72.004 || lon > 137.8347)
return true;
if (lat < 0.8293 || lat > 55.8271)
return true;
return false;
}
/**
* 84 to 火星坐标系 (GCJ-02) World Geodetic System ==> Mars Geodetic System
*
* @param lat
* @param lon
* @return
*/
public static double[] gps84_To_Gcj02(double lat, double lon) {
if (outOfChina(lat, lon)) {
return new double[]{lat,lon};
}
double dLat = transformLat(lon - 105.0, lat - 35.0);
double dLon = transformLon(lon - 105.0, lat - 35.0);
double radLat = lat / 180.0 * pi;
double magic = Math.sin(radLat);
magic = 1 - ee * magic * magic;
double sqrtMagic = Math.sqrt(magic);
dLat = (dLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * pi);
dLon = (dLon * 180.0) / (a / sqrtMagic * Math.cos(radLat) * pi);
double mgLat = lat + dLat;
double mgLon = lon + dLon;
return new double[]{mgLat, mgLon};
}
/**
* * 火星坐标系 (GCJ-02) to 84 * * @param lon * @param lat * @return
* */
public static double[] gcj02_To_Gps84(double lat, double lon) {
double[] gps = transform(lat, lon);
double lontitude = lon * 2 - gps[1];
double latitude = lat * 2 - gps[0];
return new double[]{latitude, lontitude};
}
/**
* 火星坐标系 (GCJ-02) 与百度坐标系 (BD-09) 的转换算法 将 GCJ-02 坐标转换成 BD-09 坐标
*
* @param lat
* @param lon
*/
public static double[] gcj02_To_Bd09(double lat, double lon) {
double x = lon, y = lat;
double z = Math.sqrt(x * x + y * y) + 0.00002 * Math.sin(y * x_pi);
double theta = Math.atan2(y, x) + 0.000003 * Math.cos(x * x_pi);
double tempLon = z * Math.cos(theta) + 0.0065;
double tempLat = z * Math.sin(theta) + 0.006;
double[] gps = {tempLat,tempLon};
return gps;
}
/**
* * 火星坐标系 (GCJ-02) 与百度坐标系 (BD-09) 的转换算法 * * 将 BD-09 坐标转换成GCJ-02 坐标 * * @param
* bd_lat * @param bd_lon * @return
*/
public static double[] bd09_To_Gcj02(double lat, double lon) {
double x = lon - 0.0065, y = lat - 0.006;
double z = Math.sqrt(x * x + y * y) - 0.00002 * Math.sin(y * x_pi);
double theta = Math.atan2(y, x) - 0.000003 * Math.cos(x * x_pi);
double tempLon = z * Math.cos(theta);
double tempLat = z * Math.sin(theta);
double[] gps = {tempLat,tempLon};
return gps;
}
/**将gps84转为bd09
* @param lat
* @param lon
* @return
*/
public static double[] gps84_To_bd09(double lat,double lon){
double[] gcj02 = gps84_To_Gcj02(lat,lon);
double[] bd09 = gcj02_To_Bd09(gcj02[0],gcj02[1]);
return bd09;
}
public static double[] bd09_To_gps84(double lat,double lon){
double[] gcj02 = bd09_To_Gcj02(lat, lon);
double[] gps84 = gcj02_To_Gps84(gcj02[0], gcj02[1]);
//保留小数点后六位
gps84[0] = retain6(gps84[0]);
gps84[1] = retain6(gps84[1]);
return gps84;
}
/**保留小数点后六位
* @param num
* @return
*/
private static double retain6(double num){
String result = String .format("%.6f", num);
return Double.valueOf(result);
}
}
跳转实现
跳转工具类
public class MapUtil {
public final static String BAIDU_PKG = "com.baidu.BaiduMap"; //百度地图的包名
public final static String GAODE_PKG = "com.autonavi.minimap";//高德地图的包名
public static void openGaoDe(Context context, double latitude, double longitude) {
Intent intent = new Intent("android.intent.action.VIEW", android.net.Uri.parse("androidamap://navi?sourceApplication=你的APP名称&lat=" + latitude + "&lon=" + longitude + "&dev=0"));
intent.setPackage("com.autonavi.minimap");
context.startActivity(intent);
}
public static void openBaidu(Context context, MarkerOptions markerOption) {
Intent i1 = new Intent();
double[] position = GPSUtil.gcj02_To_Bd09(markerOption.getPosition().latitude, markerOption.getPosition().longitude);
i1.setData(Uri.parse("baidumap://map/geocoder?location=" + position[0] + "," + position[1]));
context.startActivity(i1);
}
/**
* 检测地图应用是否安装
*
* @param context
* @param packagename
* @return
*/
public static boolean checkMapAppsIsExist(Context context, String packagename) {
PackageInfo packageInfo;
try {
packageInfo = context.getPackageManager().getPackageInfo(packagename, 0);
} catch (Exception e) {
packageInfo = null;
e.printStackTrace();
}
if (packageInfo == null) {
return false;
} else {
return true;
}
}
}
完整代码
public class MapActivity extends NewBaseActivity {
public static Intent getIntent(Context context) {
Intent intent = new Intent(context, MapActivity.class);
return intent;
}
private AMap aMap;
private Marker marker;
private MarkerOptions markerOption;
private MapView mMapView;
private LatLng mLatLng = new LatLng(23.111074,114.414759);
@Override
protected int getLayoutId() {
return R.layout.activity_map;
}
@Override
protected void initViews(Bundle savedInstanceState) {
//获取地图控件引用
mMapView = (MapView) findViewById(R.id.map);
//在activity执行onCreate时执行mMapView.onCreate(savedInstanceState)，创建地图
mMapView.onCreate(savedInstanceState);
aMap = mMapView.getMap();
changeCamera(
CameraUpdateFactory.newCameraPosition(new CameraPosition(
mLatLng, 18, 30, 30)));
addMarkToMap();
}
private void addMarkToMap() {
markerOption = new MarkerOptions().icon(BitmapDescriptorFactory
.defaultMarker(BitmapDescriptorFactory.HUE_AZURE))
.position(mLatLng)
.snippet("lala")
.draggable(false);
marker = aMap.addMarker(markerOption);
marker.showInfoWindow();
aMap.setOnMarkerClickListener(new AMap.OnMarkerClickListener() {
@Override
public boolean onMarkerClick(Marker marker) {
if (MapUtil.checkMapAppsIsExist(MapActivity.this,MapUtil.GAODE_PKG)){
DialogUtil.showConfirmationDialog(MapActivity.this, "打开地图", "是否打开高德地图进行导航？", new DialogUtil.OnConfirmCallback() {
@Override
public void onConfirm() {
MapUtil.openGaoDe(MapActivity.this ,markerOption);
}
@Override
public void onCancel(DialogInterface dialog) {
}
});
}else if (MapUtil.checkMapAppsIsExist(MapActivity.this , MapUtil.BAIDU_PKG)) {
DialogUtil.showConfirmationDialog(MapActivity.this, "打开地图", "是否打开百度地图进行导航？", new DialogUtil.OnConfirmCallback() {
@Override
public void onConfirm() {
MapUtil.openBaidu(MapActivity.this ,markerOption);
}
@Override
public void onCancel(DialogInterface dialog) {
}
});
}else {
ToastUtil.showShort("请安装地图");
}
return false;
}
});
}
/**
* 根据动画按钮状态，调用函数animateCamera或moveCamera来改变可视区域
*/
private void changeCamera(CameraUpdate update) {
aMap.moveCamera(update);
}
@Override
protected void initData() {
}
@Override
protected void onDestroy() {
super.onDestroy();
//在activity执行onDestroy时执行mMapView.onDestroy()，销毁地图
mMapView.onDestroy();
}
@Override
protected void onResume() {
super.onResume();
//在activity执行onResume时执行mMapView.onResume ()，重新绘制加载地图
mMapView.onResume();
}
@Override
protected void onPause() {
super.onPause();
//在activity执行onPause时执行mMapView.onPause ()，暂停地图的绘制
mMapView.onPause();
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
//在activity执行onSaveInstanceState时执行mMapView.onSaveInstanceState (outState)，保存地图当前的状态
mMapView.onSaveInstanceState(outState);
}
}
参考文章：
http://blog.csdn.net/meegomeego/article/details/39927017
http://www.jianshu.com/p/ea092e243aaa
http://blog.csdn.net/a13570320979/article/details/51366355