調用百度和高德地圖導航，好用

導航

百度方式

private void openBaiduMap(double lon, double lat, String title, String describle) {
try {
StringBuilder loc = new StringBuilder();
loc.append(“intent://map/direction?origin=latlng:”);
loc.append(lat);
loc.append(“,”);
loc.append(lon);
loc.append(“|name:”);
loc.append(“我的位置”);
loc.append(“&destination=latlng:”);
loc.append(lat);
loc.append(“,”);
loc.append(lon);
loc.append(“|name:”);
loc.append(describle);
loc.append(“&mode=driving”);
loc.append(“&referer=Autohome|GasStation#Intent;scheme=bdapp;package=com.baidu.BaiduMap;end”);
Intent intent = Intent.getIntent(loc.toString());
if (isInstallPackage(“com.baidu.BaiduMap”)) {
startActivity(intent); //啓動調用
Log.e(“GasStation”, “百度地圖客戶端已經安裝”);
} else {
Log.e(“GasStation”, “沒有安裝百度地圖客戶端”);
}
} catch (Exception e) {
e.printStackTrace();
}
}

高德方式

高德-uri-api

private void openGaoDeMap(double lon, double lat, String title, String describle) {
try {
double[] gd_lat_lon = bdToGaoDe(lon, lat);
StringBuilder loc = new StringBuilder();
loc.append(“androidamap://viewMap?sourceApplication=XX”);
loc.append(“&poiname=”);
loc.append(describle);
loc.append(“&lat=”);
loc.append(gd_lat_lon[0]);
loc.append(“&lon=”);
loc.append(gd_lat_lon[1]);
loc.append(“&dev=0”);
Intent intent = Intent.getIntent(loc.toString());
startActivity(intent);
} catch (Exception e) {
e.printStackTrace();
}
}

判定是否裝有地圖APP

private boolean isInstallPackage(String packageName) {
return new File(“/data/data/” + packageName).exists();
}

高德 com.autonavi.minimap

百度 com.baidu.BaiduMap

GCJ-02 == BD-09 地圖座標系互轉

private double[] bdToGaoDe(double bd_lat, double bd_lon) {
    double[] gd_lat_lon = new double[2];
    double PI = 3.14159265358979324 * 3000.0 / 180.0;
    double x = bd_lon - 0.0065, y = bd_lat - 0.006;
    double z = Math.sqrt(x * x + y * y) - 0.00002 * Math.sin(y * PI);
    double theta = Math.atan2(y, x) - 0.000003 * Math.cos(x * PI);
    gd_lat_lon[0] = z * Math.cos(theta);
    gd_lat_lon[1] = z * Math.sin(theta);
    return gd_lat_lon;
 }

private double[] gaoDeToBaidu(double gd_lon, double gd_lat) {
    double[] bd_lat_lon = new double[2];
    double PI = 3.14159265358979324 * 3000.0 / 180.0;
    double x = gd_lon, y = gd_lat;
    double z = Math.sqrt(x * x + y * y) + 0.00002 * Math.sin(y * PI);
    double theta = Math.atan2(y, x) + 0.000003 * Math.cos(x * PI);
    bd_lat_lon[0] = z * Math.cos(theta) + 0.0065;
    bd_lat_lon[1] = z * Math.sin(theta) + 0.006;
    return bd_lat_lon;
}