如何在Android
我有一个网络应用程序，我们在其中添加lat和lng，在网络中它清楚地显示了地图中的行车路线。我已经使用json向android发送相同的详细信息，包括api，lat和经度。但在Android应用程序中，地图没有显示正确的路径。
这是我的地图活动
public class MapsActivity extends AppCompatActivity implements OnMapReadyCallback {
private GoogleMap mMap;
LatLng latLng;
private SharedPreferenceHelper sharedPreferenceHelper;
private static final int PLAY_SERVICES_RESOLUTION_REQUEST = 9000;
MyAlertDialogFragment newFragment;
public final String BEFORE_BUS_POSTION = "BEFORE_BUS_POSTION";
public final String AFTER_BUS_POSTION = "AFTER_BUS_POSTION";
public final String CURRENT_BUS_POSTION = "CURRENT_BUS_POSTION";
public final String GREEN_COLOR_CODE = "#228b22";
public final String ORANGE_COLOR_CODE = "#C56E00";
private String[] mNavigationDrawerItemTitles;
private DrawerLayout mDrawerLayout;
private ListView mDrawerList;
Toolbar toolbar;
private CharSequence mDrawerTitle;
private CharSequence mTitle;
android.support.v7.app.ActionBarDrawerToggle mDrawerToggle;
private ProgressDialog progress;
int count = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_maps);
mTitle = mDrawerTitle = getTitle();
mNavigationDrawerItemTitles= getResources().getStringArray(R.array.navigation_drawer_items_array);
....
sharedPreferenceHelper = new SharedPreferenceHelper(getApplicationContext());
if (!sharedPreferenceHelper.getBooleanSharedPreferenceName("isRegistred")) {
RegisterGCM();
}
sharedPreferenceHelper.WriteBooleanPreference("notification", true);
/*Sharedpreference check wheather app is running for firsttime.*/
if (!sharedPreferenceHelper.getBooleanSharedPreferenceName("isfirsttime")) {
sharedPreferenceHelper.WriteBooleanPreference("isfirsttime", true);
sharedPreferenceHelper.WriteStringPreference("email", getIntent().getStringExtra("email"));
sharedPreferenceHelper.WriteBooleanPreference("ringtone", true);
sharedPreferenceHelper.WriteBooleanPreference("notification", true);
}
FragmentManager fm = getSupportFragmentManager();
SupportMapFragment supportMapFragment = SupportMapFragment.newInstance();
fm.beginTransaction().replace(R.id.content_frame, supportMapFragment).commit();
supportMapFragment.getMapAsync(this);
}
private class DrawerItemClickListener implements ListView.OnItemClickListener {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
selectItem(position);
}
}
private void selectItem(int position) {
AboutFragment aboutfragment = null;
InfoFragment infofragment = null;
switch (position) {
case 0:
startActivity(new Intent(this, MapsActivity.class));
break;
case 1:
aboutfragment = new AboutFragment();
break;
case 2:
infofragment= new InfoFragment();
break;
default:
break;
}
if (aboutfragment != null) {
FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction().replace(R.id.content_frame, aboutfragment).commit();
mDrawerList.setItemChecked(position, true);
mDrawerList.setSelection(position);
setTitle(mNavigationDrawerItemTitles[position]);
mDrawerLayout.closeDrawer(mDrawerList);
}else if (infofragment != null) {
FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction().replace(R.id.content_frame, infofragment).commit();
mDrawerList.setItemChecked(position, true);
mDrawerList.setSelection(position);
setTitle(mNavigationDrawerItemTitles[position]);
mDrawerLayout.closeDrawer(mDrawerList);
} else {
Log.e("MapActivity", "Error in creating fragment");
}
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (mDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
public void setTitle(CharSequence title) {
mTitle = title;
getSupportActionBar().setTitle(mTitle);
}
@Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
mDrawerToggle.syncState();
}
void setupToolbar(){
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayShowHomeEnabled(true);
}
void setupDrawerToggle(){
mDrawerToggle = new android.support.v7.app.ActionBarDrawerToggle(this,mDrawerLayout,toolbar,R.string.app_name, R.string.app_name);
//This is necessary to change the icon of the Drawer Toggle upon state change.
mDrawerToggle.syncState();
}
private void RegisterGCM() {
Log.i("HomeActivity", "This device is not supported.");
if (checkPlayServices()) {
// Start IntentService to register this application with GCM.
Intent intent = new Intent(this, RegistrationIntentService.class);
startService(intent);
}
}
private boolean checkPlayServices() {
GoogleApiAvailability apiAvailability = GoogleApiAvailability.getInstance();
int resultCode = apiAvailability.isGooglePlayServicesAvailable(this);
if (resultCode != ConnectionResult.SUCCESS) {
if (apiAvailability.isUserResolvableError(resultCode)) {
apiAvailability.getErrorDialog(this, resultCode, PLAY_SERVICES_RESOLUTION_REQUEST)
.show();
} else {
if(sharedPreferenceHelper.getBooleanSharedPreferenceName("googleplayservice")) {
showDialog();
}
Log.i("HomeActivity", "This device is not supported.");
}
return false;
}
return true;
}
void showDialog() {
newFragment = MyAlertDialogFragment.newInstance(R.string.google_play_service_not_found);
newFragment.show(getSupportFragmentManager(), "dialog");
}
public static class MyAlertDialogFragment extends DialogFragment {
AlertDialog alert;
public static MyAlertDialogFragment newInstance(int title) {
MyAlertDialogFragment frag = new MyAlertDialogFragment();
Bundle args = new Bundle();
args.putInt("title", title);
frag.setArguments(args);
return frag;
}
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
int title = getArguments().getInt("title");
return new AlertDialog.Builder(getActivity())
.setIcon(R.drawable.ic_info_black_24dp)
.setTitle(title)
.setMessage(R.string.google_play_service_not_found_message)
.setPositiveButton("Ok",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
((MapsActivity)getActivity()).doPositiveClick();
}
}
)
.setNegativeButton("Don't show again",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
((MapsActivity)getActivity()).doNegativeClick();
}
}
).create();
}
}
public void doPositiveClick() {
Log.i("FragmentAlertDialog", "Positive click!");
newFragment.dismiss();
}
public void doNegativeClick() {
newFragment.dismiss();
sharedPreferenceHelper.WriteBooleanPreference("googleplayservice", true);
Log.i("FragmentAlertDialog", "Negative click!");
}
@Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
progress=new ProgressDialog(this);
progress.setMessage("Map Loading");
progress.show();
progress.setCanceledOnTouchOutside(false);
final Handler ha=new Handler();
ha.postDelayed(new Runnable() {
@Override
public void run() {
//call function
setLocationFromServerWithRoute();
ha.postDelayed(this, 2000);
}
}, 10000);
// Add a marker in Sydney and move the camera
/* LatLng sydney = new LatLng(-34, 151);
mMap.addMarker(new MarkerOptions().position(sydney).title("Marker in Sydney"));
mMap.moveCamera(CameraUpdateFactory.newLatLng(sydney));*/
}
private void setLocationFromServerWithRoute() {
RequestQueue queue = Volley.newRequestQueue(this);
String email = new SharedPreferenceHelper(getApplicationContext()).getStringSharedPreferenceName("email");
String url = LoginActivity.URL+ "read.jsp?email="+email;
Log.d("email",email);
StringRequest stringRequest = new StringRequest(Request.Method.GET, url,
new Response.Listener<String>(){
@Override
public void onResponse(String response) {
JSONArray array = new JSONArray();
Log.d("Response 10 secs",response);
try {
array = new JSONArray(response);
mMap.clear();
for(int n = 0; n < array.length()-1; n++) {
JSONObject jsonObject = array.getJSONObject(n);
JSONObject jsonObjectNext = array.getJSONObject(n+1);
LatLng latLng = new LatLng(jsonObject.getDouble("latitude"), jsonObject.getDouble("longitude"));
LatLng latLngNext = new LatLng(jsonObjectNext.getDouble("latitude"), jsonObjectNext.getDouble("longitude"));
String address = jsonObject.getString("routename");
Log.d("Response",response);
if(jsonObjectNext.getString("busPosition").equals(CURRENT_BUS_POSTION) && n < array.length()-2 ) {
jsonObjectNext = array.getJSONObject(n+2);
latLngNext = new LatLng(jsonObjectNext.getDouble("latitude"), jsonObjectNext.getDouble("longitude"));
} if(jsonObject.getString("busPosition").equals(CURRENT_BUS_POSTION)){
mMap.addMarker(new MarkerOptions().position(latLng).title("" + address)
.icon(BitmapDescriptorFactory.fromResource(R.drawable.bus_blue)));
Log.d("CURRENT_BUS_POSTION","REACHED");
}else if(jsonObject.getString("busPosition").equals(AFTER_BUS_POSTION)){
if(jsonObject.getBoolean("isBusStop")) {
mMap.addMarker(new MarkerOptions().position(latLng).title("" + address)
.icon(BitmapDescriptorFactory.fromResource(R.drawable.bus_orange)));
}
mMap.addPolyline(new PolylineOptions()
.add(latLng,latLngNext)
.width(5)
.color(Color.parseColor(ORANGE_COLOR_CODE)));
}else if(jsonObject.getString("busPosition").equals(BEFORE_BUS_POSTION)){
if(jsonObject.getBoolean("isBusStop")) {
mMap.addMarker(new MarkerOptions().position(latLng).title("" + address)
.icon(BitmapDescriptorFactory.fromResource(R.drawable.bus_green)));
}
mMap.addPolyline(new PolylineOptions()
.add(latLng,latLngNext)
.width(5)
.color(Color.parseColor(GREEN_COLOR_CODE)));
}
}
JSONObject jsonObject = array.getJSONObject(array.length() - 1);
LatLng latLng = new LatLng(jsonObject.getDouble("latitude"), jsonObject.getDouble("longitude"));
String address = jsonObject.getString("routename");
if (jsonObject.getString("busPosition").equals(CURRENT_BUS_POSTION)) {
mMap.addMarker(new MarkerOptions().position(latLng).title("" + address)
.icon(BitmapDescriptorFactory.fromResource(R.drawable.bus_blue)));
} else if (jsonObject.getString("busPosition").equals(AFTER_BUS_POSTION) && jsonObject.getBoolean("isBusStop")) {
mMap.addMarker(new MarkerOptions().position(latLng).title("" + address)
.icon(BitmapDescriptorFactory.fromResource(R.drawable.bus_orange)));
} else if (jsonObject.getString("busPosition").equals(BEFORE_BUS_POSTION) && jsonObject.getBoolean("isBusStop")) {
mMap.addMarker(new MarkerOptions().position(latLng).title("" + address)
.icon(BitmapDescriptorFactory.fromResource(R.drawable.bus_green)));
}
;
if(count < 2) {
Log.v("count",""+count);
mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
mMap.animateCamera(CameraUpdateFactory.zoomTo(16.0f));
if(count == 1){
progress.hide();
}
}
count ++;
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(getApplicationContext(),"Error:"+error.getMessage(),Toast.LENGTH_SHORT).show();
}
});
queue.add(stringRequest);
}
private void setLocationFromServer() {
RequestQueue queue = Volley.newRequestQueue(this);
String email = new SharedPreferenceHelper(getApplicationContext()).getStringSharedPreferenceName("email");
String url = LoginActivity.URL+ "read.jsp?email="+email;
StringRequest stringRequest = new StringRequest(Request.Method.GET, url,
new Response.Listener<String>(){
@Override
public void onResponse(String response) {
Toast.makeText(getApplicationContext(),"Response:"+response,Toast.LENGTH_SHORT).show();
Log log = null;
log.v("response",""+response);
JSONObject jsonObject = null;
Double param1 = 0.0;
Double param2 = 0.0;
Long datecreated = null;
String dateCreated = null;
Date dateCREATED = null, twoHOURDate;
Calendar cal = Calendar.getInstance();
cal.add(Calendar.HOUR, -2);
Date twoHourBack = cal.getTime();
Log.v("twoHourBack::", "" + twoHourBack);
Toast.makeText(getApplicationContext(),"+twoHourBack:"+twoHourBack,Toast.LENGTH_SHORT).show();
JSONObject jsonObjectData = new JSONObject();
JSONArray array = new JSONArray();
try {
jsonObjectData = new JSONObject(response);
array = jsonObjectData.getJSONArray("route");
} catch (JSONException e) {
e.printStackTrace();
}
ArrayList<BusRoute> arrayList = new ArrayList();
for(int n = 0; n < array.length(); n++) {
try {
JSONObject object = array.getJSONObject(n);
BusRoute busRoute = new BusRoute();
busRoute.setId(object.getString("routeID"));
busRoute.setLatitude(object.getString("latitude"));
busRoute.setLongitude(object.getString("longitude"));
busRoute.setDate(object.getString("dateCreated"));
busRoute.setPlaceWeight(object.getString("busRouteweight"));
busRoute.setPlaceId(object.getString("routename"));
arrayList.add(busRoute);
} catch (JSONException e) {
e.printStackTrace();
}
}
Collections.sort(arrayList, new Comparator<BusRoute>() {
@Override
public int compare(BusRoute o1, BusRoute o2) {
return o1.getDate().compareTo(o2.getDate());
}
});
boolean isBusLocationPassed = false;
for(int n = 0; n < arrayList.size(); n++)
{
try {
BusRoute object = arrayList.get(n);
param1 = Double.parseDouble(object.getLatitude());
param2 = Double.parseDouble(object.getLongitude());
latLng = new LatLng(param1, param2);
Geocoder geocoder = new Geocoder(MapsActivity.this, Locale.getDefault());
List<Address> addresses = null;
try {
addresses = geocoder.getFromLocation(param1, param2, 1);
} catch (Exception e) {
e.printStackTrace();
}
String cityName = addresses.get(0).getAddressLine(0);
String stateName = addresses.get(0).getAddressLine(1);
String countryName = addresses.get(0).getAddressLine(2);
log.v("cityName", "" + cityName);
log.v("lat", "" + param1);
log.v("log", "" + param2);
BusRoute objectnext = null;
if( n < arrayList.size()-1 ) {
objectnext = arrayList.get(n + 1);
}
if(object.getId().trim() .equals(jsonObjectData.getString("prevStop").trim())){
Polyline line = mMap.addPolyline(new PolylineOptions()
.add(new LatLng(Double.parseDouble(object.getLatitude()), Double.parseDouble(object.getLongitude())), new LatLng(jsonObjectData.getDouble("latitude"), jsonObjectData.getDouble("Longitude")))
.width(5)
.color(Color.GREEN));
if( objectnext != null ) {
Polyline line2 = mMap.addPolyline(new PolylineOptions()
.add(new LatLng(jsonObjectData.getDouble("Lattitude"), jsonObjectData.getDouble("Longitude")), new LatLng(Double.parseDouble(objectnext.getLatitude()), Double.parseDouble(objectnext.getLongitude())))
.width(5)
.color(Color.parseColor("#C56E00")));
}
log.v("done", "1 " + jsonObjectData.getString("nextStop"));
LatLng latLngCurrent = new LatLng(jsonObjectData.getDouble("Lattitude"), jsonObjectData.getDouble("Longitude"));
mMap.addMarker(new MarkerOptions().position(latLngCurrent).title("" + cityName + "" + stateName + "" + countryName)
.icon(BitmapDescriptorFactory.fromResource(R.drawable.bus_blue)));
mMap.addMarker(new MarkerOptions().position(latLng).title("" + cityName + "" + stateName + "" + countryName)
.icon(BitmapDescriptorFactory.fromResource(R.drawable.bus_green)));
isBusLocationPassed = true;
}else if(isBusLocationPassed){
if( objectnext != null ) {
Polyline line = mMap.addPolyline(new PolylineOptions()
.add(new LatLng(Double.parseDouble(object.getLatitude()), Double.parseDouble(object.getLongitude())), new LatLng(Double.parseDouble(objectnext.getLatitude()), Double.parseDouble(objectnext.getLongitude())))
.width(5)
.color(Color.parseColor("#C56E00")));
}
log.v("done", "2 " + jsonObjectData.getString("nextStop"));
mMap.addMarker(new MarkerOptions().position(latLng).title("" + cityName + "" + stateName + "" + countryName)
.icon(BitmapDescriptorFactory.fromResource(R.drawable.bus_orange)));
}else{
if( objectnext != null ) {
Polyline line = mMap.addPolyline(new PolylineOptions()
.add(new LatLng(Double.parseDouble(object.getLatitude()), Double.parseDouble(object.getLongitude())), new LatLng(Double.parseDouble(objectnext.getLatitude()), Double.parseDouble(objectnext.getLongitude())))
.width(5)
.color(Color.GREEN));
}
log.v("done", "3 " + jsonObjectData.getString("nextStop"));
mMap.addMarker(new MarkerOptions().position(latLng).title("" + cityName + "" + stateName + "" + countryName)
.icon(BitmapDescriptorFactory.fromResource(R.drawable.bus_green)));
}
mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
mMap.animateCamera(CameraUpdateFactory.zoomTo(10.0f));
} catch (JSONException e) {
e.printStackTrace();
}
}
Toast.makeText(getApplicationContext(), "Location received, Latitude:" + param1 + " Longitude:" + param2, Toast.LENGTH_SHORT).show();
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(getApplicationContext(),"Error:"+error.getMessage(),Toast.LENGTH_SHORT).show();
}
});
queue.add(stringRequest);
}
}
任何帮助？
更新
我尝试使用solution one和solution two
在这两种情况下，我都收到错误：OVER_QUERY_LIMIT
任何人都有这方面的解决方案???
这就是我在android map中的方式..我想让它们在实际的道路上显示。
在网站上，它显示正确...
2 个答案:
答案 0 :(得分：2)
要在Android地图中显示实际道路路径，您可以使用下面给出的geodesic(true)。
Polyline line = map.addPolyline(new PolylineOptions()
.add(new LatLng(-37.81319, 144.96298), new LatLng(-31.95285, 115.85734))
.width(25)
.color(Color.BLUE)
.geodesic(true));
根据此link（阅读测地线）
测地线设置决定了线段之间的区段 绘制折线/多边形的连续顶点。短程 细分是那些遵循地球最短路径的细分 表面（球体），通常在地图上显示为带有曲线的曲线 墨卡托投影。非测地线段绘制为直线 在地图上。
通过调用在形状的选项对象上设置此属性 * Options.geodesic（）其中true表示段应绘制为测地线，false表示段应绘制为 直线。如果未指定，则默认为非测地线段 （假）。
对于OVER_QUERY_LIMIT： - Google Maps APIs web services的使用受每24小时期间请求数量的特定限制。发送超过这些限制的请求将收到错误消息。
如果超出使用限制，您将获得OVER_QUERY_LIMIT状态代码作为回复。
这意味着Web服务将停止提供正常响应并切换到仅返回状态代码OVER_QUERY_LIMIT，直到再次允许更多使用。这可能发生：
- 如果因为您的应用程序每秒发送的请求过多而收到错误，则会在几秒钟内完成。
- 在接下来的24小时内，如果收到错误，因为您的应用程序每天发送的请求过多。每日配额将在太平洋时间午夜重置。
解决方案： -
通过结合两种方法可以解决上述问题：
- 通过优化应用程序以更有效地使用Web服务来降低使用率。
- 在可能的情况下，通过为您的Google Maps API for Work许可购买额外的限额来提高使用限制。
查看此link以获取详细信息。
希望这会对你有所帮助。
答案 1 :(得分：0)
错误
超出查询限制意味着您每秒向API执行的查询过多，或者您已超出配额。
为了进一步帮助您，我需要详细说明您正在使用哪些API，因为我不知道我假设您正在使用Google Maps Roads API，它会为您提供所需的路径。
使用限制
每个API都有使用限制。对于Roads API，您只能进行50次每秒查询（QPS），并且还有其他限制。要查看有关此API的限制列表，我建议您查看以下链接：
我没有使用Roads API！
如果您没有使用Roads API，则必须找到您正在使用的API及其限制。以下是Google地图提供的所有API列表：
好的，我知道我正在使用哪种API，而且我达到了极限。现在怎么办？
如果您已完成上述步骤，通常有两个主要选项可以避免达到限制：
- 缓存信息
- 限制请求
每个解决方案都是一个独立的世界，但我会给你一些关于这些概念的指示，这样你就可以更轻松地跟踪它们了：
我特别推荐最后一个链接，它指向官方文档，包括缓存和限制。
希望它有所帮助！
PS：我也提出了这个问题，没有找到真正的理由为什么有人会对它进行投票。不过我建议您添加Minimal Working Example而不是发布所有代码，这会让更多人愿意帮助您。在Android案例中，我通常建议从头开始创建一个尽可能简约的项目，以便复制您的问题。
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