Android 高德地图步行导航实现：代码、布局和类详解

要实现 Android 高德地图的步行导航，你需要创建以下几个类：\n\n1. MainActivity：主活动类，负责显示地图和处理导航逻辑。\n2. MapFragment：地图片段类，用于显示地图。\n3. RoutePlanningActivity：路径规划活动类，用于选择起点和终点位置。\n4. WalkRouteOverlay：步行路径覆盖类，用于在地图上绘制步行路径。\n\n下面是具体的代码和布局实现：\n\n1. MainActivity.java:\n\njava\nimport android.os.Bundle;\nimport androidx.appcompat.app.AppCompatActivity;\nimport com.amap.api.maps.AMap;\nimport com.amap.api.maps.MapView;\n\npublic class MainActivity extends AppCompatActivity {\n\n private MapView mapView;\n private AMap aMap;\n\n @Override\n protected void onCreate(Bundle savedInstanceState) {\n super.onCreate(savedInstanceState);\n setContentView(R.layout.activity_main);\n\n mapView = findViewById(R.id.map_view);\n mapView.onCreate(savedInstanceState);\n\n if (aMap == null) {\n aMap = mapView.getMap();\n }\n\n // 设置步行导航模式\n aMap.setNaviMode(AMap.NaviMode.WALK);\n }\n\n @Override\n protected void onResume() {\n super.onResume();\n mapView.onResume();\n }\n\n @Override\n protected void onPause() {\n super.onPause();\n mapView.onPause();\n }\n\n @Override\n protected void onDestroy() {\n super.onDestroy();\n mapView.onDestroy();\n }\n}\n\n\n2. activity_main.xml:\n\nxml\n<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"\n xmlns:tools="http://schemas.android.com/tools"\n android:layout_width="match_parent"\n android:layout_height="match_parent"\n android:orientation="vertical"\n tools:context=".MainActivity">\n\n <com.amap.api.maps.MapView\n android:id="@+id/map_view"\n android:layout_width="match_parent"\n android:layout_height="match_parent" />\n\n</LinearLayout>\n\n\n3. MapFragment.java:\n\njava\nimport android.os.Bundle;\nimport androidx.fragment.app.Fragment;\nimport android.view.LayoutInflater;\nimport android.view.View;\nimport android.view.ViewGroup;\n\nimport com.amap.api.maps.MapView;\n\npublic class MapFragment extends Fragment {\n\n private MapView mapView;\n\n public MapFragment() {\n // Required empty public constructor\n }\n\n @Override\n public View onCreateView(LayoutInflater inflater, ViewGroup container,\n Bundle savedInstanceState) {\n // Inflate the layout for this fragment\n View view = inflater.inflate(R.layout.fragment_map, container, false);\n\n mapView = view.findViewById(R.id.map_view);\n mapView.onCreate(savedInstanceState);\n\n return view;\n }\n\n @Override\n public void onResume() {\n super.onResume();\n mapView.onResume();\n }\n\n @Override\n public void onPause() {\n super.onPause();\n mapView.onPause();\n }\n\n @Override\n public void onDestroy() {\n super.onDestroy();\n mapView.onDestroy();\n }\n}\n\n\n4. fragment_map.xml:\n\nxml\n<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"\n xmlns:tools="http://schemas.android.com/tools"\n android:layout_width="match_parent"\n android:layout_height="match_parent"\n tools:context=".MapFragment">\n\n <com.amap.api.maps.MapView\n android:id="@+id/map_view"\n android:layout_width="match_parent"\n android:layout_height="match_parent" />\n\n</FrameLayout>\n\n\n5. RoutePlanningActivity.java:\n\njava\nimport android.os.Bundle;\nimport android.view.View;\nimport android.widget.Button;\nimport androidx.appcompat.app.AppCompatActivity;\n\npublic class RoutePlanningActivity extends AppCompatActivity {\n\n private Button startNavigationButton;\n\n @Override\n protected void onCreate(Bundle savedInstanceState) {\n super.onCreate(savedInstanceState);\n setContentView(R.layout.activity_route_planning);\n\n startNavigationButton = findViewById(R.id.start_navigation_button);\n startNavigationButton.setOnClickListener(new View.OnClickListener() {\n @Override\n public void onClick(View v) {\n // TODO: 开始导航\n }\n });\n }\n}\n\n\n6. activity_route_planning.xml:\n\nxml\n<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"\n xmlns:tools="http://schemas.android.com/tools"\n android:layout_width="match_parent"\n android:layout_height="match_parent"\n android:orientation="vertical"\n tools:context=".RoutePlanningActivity">\n\n <Button\n android:id="@+id/start_navigation_button"\n android:layout_width="wrap_content"\n android:layout_height="wrap_content"\n android:text="开始导航" />\n\n</LinearLayout>\n\n\n7. WalkRouteOverlay.java:\n\njava\nimport android.content.Context;\nimport com.amap.api.maps.AMap;\nimport com.amap.api.maps.model.WalkRouteResult;\nimport com.amap.api.navi.enums.PathPlanningStrategy;\nimport com.amap.api.navi.model.AMapNaviPath;\nimport com.amap.api.navi.model.AMapNaviStep;\nimport com.amap.api.navi.view.RouteOverLay;\n\npublic class WalkRouteOverlay extends RouteOverLay {\n\n private AMap aMap;\n private AMapNaviPath path;\n\n public WalkRouteOverlay(Context context, AMap aMap, AMapNaviPath path) {\n super(context, aMap);\n this.aMap = aMap;\n this.path = path;\n }\n\n public void addToMap() {\n for (AMapNaviStep step : path.getSteps()) {\n addPolyline(step.getPolyline());\n }\n }\n\n public void removeFromMap() {\n removeFromMapInternal();\n }\n\n @Override\n protected float getRouteWidth() {\n return 10.0f;\n }\n\n @Override\n protected int getPassedRouteColor() {\n return 0xFF888888;\n }\n\n @Override\n protected int getWalkingRouteColor() {\n return 0xFF0079FF;\n }\n\n @Override\n protected int getUnknownRouteColor() {\n return 0xFF0079FF;\n }\n\n @Override\n protected int getWalkPassedRouteColor() {\n return 0xFF888888;\n }\n\n @Override\n protected int getWalkRouteColor() {\n return 0xFF0079FF;\n }\n\n @Override\n protected int getWalkUnknownRouteColor() {\n return 0xFF0079FF;\n }\n\n @Override\n protected float getArrowTextureWidth() {\n return 20.0f;\n }\n\n @Override\n protected float getArrowTextureHeight() {\n return 20.0f;\n }\n\n @Override\n protected float getArrowSpacing() {\n return 30.0f;\n }\n\n @Override\n protected int getArrowColor() {\n return 0xFF0079FF;\n }\n\n @Override\n protected int getArrowBorderColor() {\n return 0xFFFFFFFF;\n }\n\n @Override\n protected int getLineWidth() {\n return 20;\n }\n\n @Override\n protected int getMinDistanceToDisplayArrow() {\n return 40;\n }\n\n @Override\n protected int getMinDistanceToDisplayBuilding() {\n return 40;\n }\n\n @Override\n protected PathPlanningStrategy getRoutePathPlanningPolicy() {\n return PathPlanningStrategy.DRIVING_DEFAULT;\n }\n\n @Override\n protected boolean isRouteOverlayVisible() {\n return true;\n }\n}\n\n\n这些类可以帮助你实现 Android 高德地图的步行导航功能。你可以根据自己的实际需求进行修改和扩展。\n