Android 调用外部导航（百度、高德、网页）

• 判断手机是否安装了百度地图APP或者高德地图APP

   /**
     * 判断用户是否安装了地图APP
     * com.autonavi.minimap:高德地图packageName
     * com.baidu.BaiduMap:百度地图packageName
     * */
    private boolean isInstallPackage(String packageName) {
        return new File("/data/data/" + packageName).exists();
    }

• 如果安装了百度地图，打开百度地图app进行导航

 private void openBaiduMap(double longitude, double latitude, String describle) {
        try {
            StringBuilder loc = new StringBuilder();
            loc.append("intent://map/direction?origin=latlng:");
            loc.append(latitude);
            loc.append(",");
            loc.append(longitude);
            loc.append("|name:");
            loc.append("我的位置");
            loc.append("&destination=latlng:");
            loc.append(latitude);
            loc.append(",");
            loc.append(longitude);
            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());
            startActivity(intent); //启动调用
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

• 打开高德地图APP进行导航

   private void openGaoDeMap(double lon, double lat, 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();
        }
    }

• 地图坐标系转化

    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;
    }

• 调用网页进行导航

  Intent i = new Intent(Intent.ACTION_VIEW, Uri.parse("http://ditu.google.cn/maps?hl=zh&mrt=loc&q=39.940409,116.355257(西直门)"));
                    startActivity(i);