implementation 'com.google.android.libraries.places:places:3.1.0'
implementation 'com.google.maps.android:android-maps-utils:2.4.0'
implementation 'com.google.android.gms:play-services-maps:18.1.0'
implementation 'com.google.android.gms:play-services-location:21.0.1'

// 初始化Places SDK
Places.initialize(getApplicationContext(), "YOUR_API_KEY");

// 设置自动完成意图
List<Place.Field> fields = Arrays.asList(Place.Field.ID, Place.Field.NAME, Place.Field.LAT_LNG);

// 启动自动完成意图
Intent intent = new Autocomplete.IntentBuilder(
        AutocompleteActivityMode.FULLSCREEN,
        fields)
        .build(this);
startActivityForResult(intent, AUTOCOMPLETE_REQUEST_CODE);

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    
    if (requestCode == AUTOCOMPLETE_REQUEST_CODE) {
        if (resultCode == RESULT_OK) {
            Place place = Autocomplete.getPlaceFromIntent(data);
            // 处理选中的地点
            LatLng latLng = place.getLatLng();
            String placeName = place.getName();
            
            // 保存为起点或终点
            if (isStartPoint) {
                startLatLng = latLng;
                startPlaceName = placeName;
            } else {
                endLatLng = latLng;
                endPlaceName = placeName;
            }
            
            // 如果起点和终点都有了，调用Directions API
            if (startLatLng != null && endLatLng != null) {
                getDirections(startLatLng, endLatLng);
            }
        }
    }
}

private void getDirections(LatLng origin, LatLng destination) {
    // 创建Directions API请求
    String originStr = origin.latitude + "," + origin.longitude;
    String destinationStr = destination.latitude + "," + destination.longitude;
    
    // 使用Volley或其他HTTP客户端发起请求
    String url = "https://maps.googleapis.com/maps/api/directions/json?" +
            "origin=" + originStr +
            "&destination=" + destinationStr +
            "&key=YOUR_API_KEY";
    
    JsonObjectRequest jsonObjectRequest = new JsonObjectRequest
            (Request.Method.GET, url, null, new Response.Listener<JSONObject>() {
                @Override
                public void onResponse(JSONObject response) {
                    try {
                        // 解析路线数据
                        parseDirectionResponse(response);
                    } catch (JSONException e) {
                        e.printStackTrace();
                    }
                }
            }, new Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError error) {
                    error.printStackTrace();
                }
            });
    
    // 添加到请求队列
    RequestQueue queue = Volley.newRequestQueue(this);
    queue.add(jsonObjectRequest);
}

private void parseDirectionResponse(JSONObject response) throws JSONException {
    JSONArray routes = response.getJSONArray("routes");
    JSONObject route = routes.getJSONObject(0);
    JSONObject overviewPolyline = route.getJSONObject("overview_polyline");
    String points = overviewPolyline.getString("points");
    
    // 解码polyline点
    List<LatLng> path = PolyUtil.decode(points);
    
    // 在地图上绘制路线
    PolylineOptions options = new PolylineOptions()
            .addAll(path)
            .width(10)
            .color(Color.BLUE)
            .geodesic(true);
    
    mMap.addPolyline(options);
    
    // 移动相机以显示整个路线
    LatLngBounds.Builder builder = new LatLngBounds.Builder();
    for (LatLng point : path) {
        builder.include(point);
    }
    LatLngBounds bounds = builder.build();
    
    mMap.animateCamera(CameraUpdateFactory.newLatLngBounds(bounds, 100));
}