做网站政府扶持产品的推广及宣传思路
开年第一篇，处理了一下年前的小问题。
问题：本地app跳转到第三方app地图进行导航，获取不到第三方地图是否安装。
解决：
1.添加包名
This can be done by adding a <queries> element in the Android manifest.在app下的manifest文件内manifest标签下添加<queries>标签设置包名
<queries><package android:name="com.autonavi.minimap" /><package android:name="com.baidu.BaiduMap" /><package android:name="com.tencent.map" /></queries>2.MapUtil工具类
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.Build;import java.io.File;public class MapUtil {public static final String PN_GAODE_MAP = "com.autonavi.minimap";// 高德地图包名public static final String PN_BAIDU_MAP = "com.baidu.BaiduMap"; // 百度地图包名public static final String PN_TENCENT_MAP = "com.tencent.map"; // 腾讯地图包名/*** 检查地图应用是否安装* @return*/public static boolean isGdMapInstalled(){return isInstallPackage(PN_GAODE_MAP);}public static boolean isBaiduMapInstalled(){return isInstallPackage(PN_BAIDU_MAP);}public static boolean isTencentMapInstalled(){return isInstallPackage(PN_TENCENT_MAP);}/*** 判断是否安装目标应用*/private static boolean isInstallPackage(String packageName) {/**判断 API版本是否大于 29（Android 11）* 判断应用是否安装(高德或者百度等)，注意存储分区* 大于29会强制分区*/if (Build.VERSION.SDK_INT < 24) {return new File("/data/data/" + packageName).exists();}else {return new File("storage/emulated/0/Android/data/" + packageName).exists();}}/*** 百度转高德* @param bd_lat* @param bd_lon* @return*/public static 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;}/*** 高德、腾讯转百度* @param gd_lon* @param gd_lat* @return*/private static 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;}/*** 打开高德地图导航功能* @param context* @param slat 起点纬度* @param slon 起点经度* @param sname 起点名称 可不填（0,0，null）* @param dlat 终点纬度* @param dlon 终点经度* @param dname 终点名称 必填*/public static void openGaoDeNavi(Context context, double slat, double slon, String sname, double dlat, double dlon, String dname){String uriString = null;StringBuilder builder = new StringBuilder("amapuri://route/plan?sourceApplication=maxuslife");if (slat != 0) {builder.append("&sname=").append(sname).append("&slat=").append(slat).append("&slon=").append(slon);}builder.append("&dlat=").append(dlat).append("&dlon=").append(dlon).append("&dname=").append(dname).append("&dev=0").append("&t=0");uriString = builder.toString();Intent intent = new Intent(Intent.ACTION_VIEW);intent.setPackage(PN_GAODE_MAP);intent.setData(Uri.parse(uriString));context.startActivity(intent);}/*** 打开腾讯地图* params 参考http://lbs.qq.com/uri_v1/guide-route.html** @param context* @param slat 起点纬度* @param slon 起点经度* @param sname 起点名称 可不填（0,0，null）* @param dlat 终点纬度* @param dlon 终点经度* @param dname 终点名称 必填* 驾车：type=drive，policy有以下取值0：较快捷1：无高速2：距离policy的取值缺省为0* &from=" + dqAddress + "&fromcoord=" + dqLatitude + "," + dqLongitude + "*/public static void openTencentMap(Context context, double slat, double slon, String sname, double dlat, double dlon, String dname) {String uriString = null;StringBuilder builder = new StringBuilder("qqmap://map/routeplan?type=drive&policy=0&referer=zhongshuo");if (slat != 0) {builder.append("&from=").append(sname).append("&fromcoord=").append(slat).append(",").append(slon);}builder.append("&to=").append(dname).append("&tocoord=").append(dlat).append(",").append(dlon);uriString = builder.toString();Intent intent = new Intent(Intent.ACTION_VIEW);intent.setPackage(PN_TENCENT_MAP);intent.setData(Uri.parse(uriString));context.startActivity(intent);}/*** 打开百度地图导航功能(默认坐标点是高德地图，需要转换)* @param context* @param slat 起点纬度* @param slon 起点经度* @param sname 起点名称 可不填（0,0，null）* @param dlat 终点纬度* @param dlon 终点经度* @param dname 终点名称 必填*/public static void openBaiDuNavi(Context context,double slat, double slon, String sname, double dlat, double dlon, String dname){String uriString = null;double destination[] = gaoDeToBaidu(dlat, dlon);dlat = destination[0];dlon = destination[1];StringBuilder builder = new StringBuilder("baidumap://map/direction?mode=driving&");if (slat != 0){//起点坐标转换double[] origin = gaoDeToBaidu(slat, slon);slat = origin[0];slon = origin[1];builder.append("origin=latlng:").append(slat).append(",").append(slon).append("|name:").append(sname);}builder.append("&destination=latlng:").append(dlat).append(",").append(dlon).append("|name:").append(dname);uriString = builder.toString();Intent intent = new Intent(Intent.ACTION_VIEW);intent.setPackage(PN_BAIDU_MAP);intent.setData(Uri.parse(uriString));context.startActivity(intent);}
}3.调用
MapUtil. openGaoDeNavi(Context context, double slat, double slon, String sname, double dlat, double dlon, String dname)；
工具类可以直接用，SelectDialog就是一个底部弹窗。