android - 最近的医院/餐厅的MapActivity查询不起作用

编辑：已解决！除了丹尼尔的回答（挽救了我的生命），这是我所做的：1.将“ MapActivity2”类替换为服务器API密钥。2.将其他键放在清单和'maps_activites.xml中。是android API密钥3.在Google Developer APIS上启用以下APIS：Google Maps Android API适用于Android的Google Places APIGoogle Places API网络服务4. BOOM！有效。无论如何，这是我的github存储库中的代码：https://github.com/bholagabbar/AurumHealthApp我正在尝试从当前位置检索最近的餐馆。我正在使用在网上here找到的代码。但是我得到以下错误。我已将整个logcat放置在执行程序中，并以粗体突出显示了错误： 11-30 04：53：31.000 25292-25292 /？ I / art：后启用-Xcheck：jni 11-30 04：53：31.033 25292-25302 /？ I / art：调试器不再活动 11-30 04：53：31.100 25292-25311 /？ I / GMPM：应用测量正在启动11-30 04：53：31.109 25292-25311 /？ E / GMPM：getGoogleAppId失败，状态：10 11-30 04：53：31.111 25292-25311 /？ E / GMPM：无法上传。已禁用应用程序测量11-30 04：53：31.125 25292-25314 /？ D / OpenGLRenderer：使用EGL_SWAP_BEHAVIOR_PRESERVED：true`11-30 04：53：31.135 25292-25292 /？ D /地图集：正在验证地图... 11-30 04：53：31.178 25292-25314 /？ I / Adreno-EGL :: EGL 1.4 QUALCOMM版本：（Ibddc658e36）11-30 04：53：31.178 25292-25314 /？ I / Adreno-EGL：OpenGL ES着色器编译器版本：E031.25.03.0411-30 04：53：31.178 25292-25314 /？ I / Adreno-EGL：建立日期：15/10/15星期一11-30 04：53：31.178 25292-25314 /？ I / Adreno-EGL：本地分支机构：workspace11-30 04：53：31.178 25292-25314 /？ I / Adreno-EGL：远程分支机构：11-30 04：53：31.178 25292-25314 /？ I / Adreno-EGL：本地修补程序：11-30 04：53：31.178 25292-25314 /？ I / Adreno-EGL：重建分支：11-30 04：53：31.179 25292-25314 /？ I / OpenGLRenderer：初始化的EGL版本1.411-30 04：53：31.193 25292-25314 /？ D / OpenGLRenderer：启用调试模式011-30 04：53：32.663 25292-25292 / com.iotaconcepts.aurum I / Choreographer：跳过了37帧！该应用程序可能会在其主线程上做太多工作.11-30 04：53：32.737 25292-25314 / com.iotaconcepts.aurum V / RenderScript：应用程序请求CPU执行11-30 04：53：32.747 25292-25314 / com .iotaconcepts.aurum V / RenderScript：0xb7f96960启动线程，CPU 411-30 04：53：36.092 25292-25292 / com.iotaconcepts.aurum D / AndroidRuntime：关闭VM11-30 04：53：36.093 25292-25292 /com.iotaconcepts.aurum E / AndroidRuntime：致命例外：main11-30 04：53：36.093 25292-25292 / com.iotaconcepts.aurum E / AndroidRuntime：进程：com.iotaconcepts.aurum，PID：2529211-30 04:53 ：36.093 25292-25292 / com.iotaconcepts.aurum E / AndroidRuntime：java.lang.RuntimeException：无法启动活动ComponentInfo {com.iotaconcepts.aurum / com.iotaconcepts.aurum.MapsActivity2}：java.lang.NullPointerException：尝试在空对象引用上调用虚拟方法'void com.google.android.gms.maps.SupportMapFragment.getMapAsync（com.google.android.gms.maps.OnMapReadyCallback）'11 -13 04：53：36.093 2529 2-25292 / com.iotaconcepts.aurum E / AndroidRuntime：位于android.app.ActivityThread.performLaunchActivity（ActivityThread.java:2339）11-30 04：53：36.093 25292-25292 / com.iotaconcepts.aurum E / AndroidRuntime：在android.app.ActivityThread.handleLaunchActivity（ActivityThread.java:2413）11-30 04：53：36.093 25292-25292 / com.iotaconcepts.aurum E / AndroidRuntime：位于android.app.ActivityThread.access $ 800（ActivityThread.java:155 ）11-30 04：53：36.093 25292-25292 / com.iotaconcepts.aurum E / AndroidRuntime：at android.app.ActivityThread $ H.handleMessage（ActivityThread.java:1317）11-30 04：53：36.093 25292-25292 /com.iotaconcepts.aurum E / AndroidRuntime：在android.os.Handler.dispatchMessage（Handler.java:102）11-30 04：53：36.093 25292-25292 / com.iotaconcepts.aurum E / AndroidRuntime：在android.os .Looper.loop（Looper.java:135）11-30 04：53：36.093 25292-25292 / com.iotaconcepts.aurum E / AndroidRuntime：at android.app.ActivityThread.main（ActivityThread.java:5343）11-30 04：53：36.093 25292-25292 / com.iotaconcep ts.aurum E / AndroidRuntime：在java.lang.reflect.Method.invoke（本机方法）11-30 04：53：36.093 25292-25292 / com.iotaconcepts.aurum E / AndroidRuntime：在java.lang.reflect.Method .invoke（Method.java:372）11-30 04：53：36.093 25292-25292 / com.iotaconcepts.aurum E / AndroidRuntime：at com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:907 ）11-30 04：53：36.093 25292-25292 / com.iotaconcepts.aurum E / AndroidRuntime：at com.android.internal.os.ZygoteInit.main（ZygoteInit.java:702）11-30 04：53：36.093 25292 -25292 / com.iotaconcepts.aurum E / AndroidRuntime：由以下原因引起：java.lang.NullPointerException：尝试调用虚拟方法'void com.google.android.gms.maps.SupportMapFragment.getMapAsync（com.google.android.gms。在空对象上引用maps.OnMapReadyCallback）'11-30 04：53：36.093 25292-25292 / com.iotaconcepts.aurum E / AndroidRuntime：at com.iotaconcepts.aurum.MapsActivity2.onCreate（MapsActivity2.java:42）11-30 04：53：36.093 25292-25292 / com.iotaconcepts.aurum E / Andr oidRuntime：位于android.app.Activity.performCreate（Activity.java:6010）11-30 04：53：36.093 25292-25292 / com.iotaconcepts.aurum E / AndroidRuntime：位于android.app.Instrumentation.callActivityOnCreate（Instrumentation.java ：1129）11-30 04：53：36.093 25292-25292 / com.iotaconcepts.aurum E / AndroidRuntime：位于android.app.ActivityThread.performLaunchActivity（ActivityThread.java:2292）11-30 04：53：36.093 25292-25292 /com.iotaconcepts.aurum E / AndroidRuntime：位于android.app.ActivityThread.handleLaunchActivity（ActivityThread.java:2413）11-30 04：53：36.093 25292-25292 / com.iotaconcepts.aurum E / AndroidRuntime：位于android.app .ActivityThread.access $ 800（ActivityThread.java:155）11-30 04：53：36.093 25292-25292 / com.iotaconcepts.aurum E / AndroidRuntime：at android.app.ActivityThread $ H.handleMessage（ActivityThread.java:1317） 11-30 04：53：36.093 25292-25292 / com.iotaconcepts.aurum E / AndroidRuntime：at android.os.Handler.dispatchMessage（Handler.java:102）11-30 04：53：36.093 25292-25292 / com。 iotaconcep ts.aurum E / AndroidRuntime：位于android.os.Looper.loop（Looper.java:135）11-30 04：53：36.093 25292-25292 / com.iotaconcepts.aurum E / AndroidRuntime：位于android.app.ActivityThread。 main（ActivityThread.java:5343）11-30 04：53：36.093 25292-25292 / com.iotaconcepts.aurum E / AndroidRuntime：at java.lang.reflect.Method.invoke（本机方法）11-30 04:53： 36.093 25292-25292 / com.iotaconcepts.aurum E / AndroidRuntime：at java.lang.reflect.Method.invoke（Method.java:372）11-30 04：53：36.093 25292-25292 / com.iotaconcepts.aurum E / AndroidRuntime：在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:907）11-30 04：53：36.093 25292-25292 / com.iotaconcepts.aurum E / AndroidRuntime：在com.android.internal .os.ZygoteInit.main（ZygoteInit.java:702）在过去的两个小时里，我一直迷失方向，试图弄清我们的错误，但徒劳无功。这是活动的代码：编辑修复后，这是代码包com.iotaconcepts.aurum;import android.os.AsyncTask;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.util.Log;import com.google.android.gms.maps.GoogleMap;import com.google.android.gms.maps.OnMapReadyCallback;import com.google.android.gms.maps.SupportMapFragment;import com.google.android.gms.maps.model.BitmapDescriptorFactory;import com.google.android.gms.maps.model.LatLng;import com.google.android.gms.maps.model.Marker;import com.google.android.gms.maps.model.MarkerOptions;import org.json.JSONArray;import org.json.JSONException;import org.json.JSONObject;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.net.HttpURLConnection;import java.net.URL;import java.util.ArrayList;import java.util.HashMap;import java.util.List;public class MapsActivity2 extends AppCompatActivity implements OnMapReadyCallback{ private GoogleMap mGoogleMap; SupportMapFragment mapFrag; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mapFrag = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map); mapFrag.getMapAsync(this); } @Override public void onMapReady(GoogleMap googleMap) { mGoogleMap=googleMap; mGoogleMap.setMyLocationEnabled(true); StringBuilder sbValue = new StringBuilder(sbMethod()); PlacesTask placesTask = new PlacesTask(); placesTask.execute(sbValue.toString()); } public StringBuilder sbMethod() { //use your current location here double mLatitude = 37.77657; double mLongitude = -122.417506; StringBuilder sb = new StringBuilder("https://maps.googleapis.com/maps/api/place/nearbysearch/json?"); sb.append("location=" + mLatitude + "," + mLongitude); sb.append("&radius=5000"); sb.append("&types=" + "restaurant"); sb.append("&sensor=true"); sb.append("&key=AIza************************"); Log.d("Map", "url: " + sb.toString()); return sb; } private class PlacesTask extends AsyncTask<String, Integer, String> { String data = null; // Invoked by execute() method of this object @Override protected String doInBackground(String... url) { try { data = downloadUrl(url[0]); } catch (Exception e) { Log.d("Background Task", e.toString()); } return data; } // Executed after the complete execution of doInBackground() method @Override protected void onPostExecute(String result) { ParserTask parserTask = new ParserTask(); // Start parsing the Google places in JSON format // Invokes the "doInBackground()" method of the class ParserTask parserTask.execute(result); } } private String downloadUrl(String strUrl) throws IOException { String data = ""; InputStream iStream = null; HttpURLConnection urlConnection = null; try { URL url = new URL(strUrl); // Creating an http connection to communicate with url urlConnection = (HttpURLConnection) url.openConnection(); // Connecting to url urlConnection.connect(); // Reading data from url iStream = urlConnection.getInputStream(); BufferedReader br = new BufferedReader(new InputStreamReader(iStream)); StringBuffer sb = new StringBuffer(); String line = ""; while ((line = br.readLine()) != null) { sb.append(line); } data = sb.toString(); br.close(); } catch (Exception e) { Log.d("Exception", e.toString()); } finally { iStream.close(); urlConnection.disconnect(); } return data; } private class ParserTask extends AsyncTask<String, Integer, List<HashMap<String, String>>> { JSONObject jObject; // Invoked by execute() method of this object @Override protected List<HashMap<String, String>> doInBackground(String... jsonData) { List<HashMap<String, String>> places = null; Place_JSON placeJson = new Place_JSON(); try { jObject = new JSONObject(jsonData[0]); places = placeJson.parse(jObject); } catch (Exception e) { Log.d("Exception", e.toString()); } return places; } // Executed after the complete execution of doInBackground() method @Override protected void onPostExecute(List<HashMap<String, String>> list) { Log.d("Map", "list size: " + list.size()); // Clears all the existing markers; mGoogleMap.clear(); for (int i = 0; i < list.size(); i++) { // Creating a marker MarkerOptions markerOptions = new MarkerOptions(); // Getting a place from the places list HashMap<String, String> hmPlace = list.get(i); // Getting latitude of the place double lat = Double.parseDouble(hmPlace.get("lat")); // Getting longitude of the place double lng = Double.parseDouble(hmPlace.get("lng")); // Getting name String name = hmPlace.get("place_name"); Log.d("Map", "place: " + name); // Getting vicinity String vicinity = hmPlace.get("vicinity"); LatLng latLng = new LatLng(lat, lng); // Setting the position for the marker markerOptions.position(latLng); markerOptions.title(name + " : " + vicinity); markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_MAGENTA)); // Placing a marker on the touched position Marker m = mGoogleMap.addMarker(markerOptions); } } } public class Place_JSON { /** * Receives a JSONObject and returns a list */ public List<HashMap<String, String>> parse(JSONObject jObject) { JSONArray jPlaces = null; try { /** Retrieves all the elements in the 'places' array */ jPlaces = jObject.getJSONArray("results"); } catch (JSONException e) { e.printStackTrace(); } /** Invoking getPlaces with the array of json object * where each json object represent a place */ return getPlaces(jPlaces); } private List<HashMap<String, String>> getPlaces(JSONArray jPlaces) { int placesCount = jPlaces.length(); List<HashMap<String, String>> placesList = new ArrayList<HashMap<String, String>>(); HashMap<String, String> place = null; /** Taking each place, parses and adds to list object */ for (int i = 0; i < placesCount; i++) { try { /** Call getPlace with place JSON object to parse the place */ place = getPlace((JSONObject) jPlaces.get(i)); placesList.add(place); } catch (JSONException e) { e.printStackTrace(); } } return placesList; } /** * Parsing the Place JSON object */ private HashMap<String, String> getPlace(JSONObject jPlace) { HashMap<String, String> place = new HashMap<String, String>(); String placeName = "-NA-"; String vicinity = "-NA-"; String latitude = ""; String longitude = ""; String reference = ""; try { // Extracting Place name, if available if (!jPlace.isNull("name")) { placeName = jPlace.getString("name"); } // Extracting Place Vicinity, if available if (!jPlace.isNull("vicinity")) { vicinity = jPlace.getString("vicinity"); } latitude = jPlace.getJSONObject("geometry").getJSONObject("location").getString("lat"); longitude = jPlace.getJSONObject("geometry").getJSONObject("location").getString("lng"); reference = jPlace.getString("reference"); place.put("place_name", placeName); place.put("vicinity", vicinity); place.put("lat", latitude); place.put("lng", longitude); place.put("reference", reference); } catch (JSONException e) { e.printStackTrace(); } return place; } }}XML文件是： <?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent"> <fragment xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" xmlns:map="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent" android:layout_height="match_parent" android:id="@+id/map" tools:context="com.iotaconcepts.aurum.MapsActivity2" android:name="com.google.android.gms.maps.SupportMapFragment"/></LinearLayout>清单文件：<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.iotaconcepts.aurum" > <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> <uses-library android:name="com.google.android.maps" />  <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:theme="@style/MyMaterialTheme" > <activity android:name=".MainActivity" android:label="Aurum" > <intent-filter> <action android:name="android.intent.action.MAINACTIVITY" /> <category android:name="android.intent.category.DEFAULT" /> </intent-filter> </activity> <activity android:name=".LoginActivity" android:label="Aurum" android:theme="@style/ColorfulActionBarTheme" > <intent-filter> <action android:name="android.intent.action.LOGIN" /> <category android:name="android.intent.category.DEFAULT" /> </intent-filter> </activity> <activity android:name=".Splash" android:label="Aurum" android:theme="@style/ColorfulActionBarTheme" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name=".Diagnosis" android:label="Aurum" android:theme="@style/Theme.Transparent" > <intent-filter> <action android:name="android.intent.action.DIAGNOSIS" /> <category android:name="android.intent.category.DEFAULT" /> </intent-filter> </activity>  <meta-data android:name="com.google.android.geo.API_KEY" android:value="AIza*************************" /> <activity android:name=".MapsActivity2" android:label="@string/title_activity_maps2" > </activity> <activity android:name=".testactivity" > </activity> </application></manifest> (adsbygoogle = window.adsbygoogle || []).push({}); 最佳答案我只是运行您的代码并使它运行。看来主要问题是key和查询URL中的api键之间存在空格。您也没有任何调用getMapAsync()的代码，因此您没有获取地图引用，也不会调用onMapReady()。另外，请确保将服务器API密钥与Places Web API一起使用。这是对我有用的代码：import android.os.AsyncTask;import android.os.Bundle;import android.support.v4.app.FragmentActivity;import android.support.v7.app.AppCompatActivity;import android.util.Log;import com.google.android.gms.maps.GoogleMap;import com.google.android.gms.maps.OnMapReadyCallback;import com.google.android.gms.maps.SupportMapFragment;import com.google.android.gms.maps.model.BitmapDescriptorFactory;import com.google.android.gms.maps.model.LatLng;import com.google.android.gms.maps.model.Marker;import com.google.android.gms.maps.model.MarkerOptions;import org.json.JSONArray;import org.json.JSONException;import org.json.JSONObject;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.net.HttpURLConnection;import java.net.URL;import java.util.ArrayList;import java.util.HashMap;import java.util.List;public class MapsActivity2 extends AppCompatActivity implements OnMapReadyCallback{ private GoogleMap mGoogleMap; SupportMapFragment mapFrag; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); //Wrong one: //setContentView(R.layout.activity_main); //Use this one: setContentView(R.layout.activity_maps2); mapFrag = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map); mapFrag.getMapAsync(this); } @Override public void onMapReady(GoogleMap googleMap) { mGoogleMap=googleMap; mGoogleMap.setMyLocationEnabled(true); StringBuilder sbValue = new StringBuilder(sbMethod()); PlacesTask placesTask = new PlacesTask(); placesTask.execute(sbValue.toString()); } public StringBuilder sbMethod() { //use your current location here double mLatitude = 37.77657; double mLongitude = -122.417506; StringBuilder sb = new StringBuilder("https://maps.googleapis.com/maps/api/place/nearbysearch/json?"); sb.append("location=" + mLatitude + "," + mLongitude); sb.append("&radius=5000"); sb.append("&types=" + "restaurant"); sb.append("&sensor=true"); sb.append("&key=AIza******************************"); Log.d("Map", "url: " + sb.toString()); return sb; } private class PlacesTask extends AsyncTask<String, Integer, String> { String data = null; // Invoked by execute() method of this object @Override protected String doInBackground(String... url) { try { data = downloadUrl(url[0]); } catch (Exception e) { Log.d("Background Task", e.toString()); } return data; } // Executed after the complete execution of doInBackground() method @Override protected void onPostExecute(String result) { ParserTask parserTask = new ParserTask(); // Start parsing the Google places in JSON format // Invokes the "doInBackground()" method of the class ParserTask parserTask.execute(result); } } private String downloadUrl(String strUrl) throws IOException { String data = ""; InputStream iStream = null; HttpURLConnection urlConnection = null; try { URL url = new URL(strUrl); // Creating an http connection to communicate with url urlConnection = (HttpURLConnection) url.openConnection(); // Connecting to url urlConnection.connect(); // Reading data from url iStream = urlConnection.getInputStream(); BufferedReader br = new BufferedReader(new InputStreamReader(iStream)); StringBuffer sb = new StringBuffer(); String line = ""; while ((line = br.readLine()) != null) { sb.append(line); } data = sb.toString(); br.close(); } catch (Exception e) { Log.d("Exception", e.toString()); } finally { iStream.close(); urlConnection.disconnect(); } return data; } private class ParserTask extends AsyncTask<String, Integer, List<HashMap<String, String>>> { JSONObject jObject; // Invoked by execute() method of this object @Override protected List<HashMap<String, String>> doInBackground(String... jsonData) { List<HashMap<String, String>> places = null; Place_JSON placeJson = new Place_JSON(); try { jObject = new JSONObject(jsonData[0]); places = placeJson.parse(jObject); } catch (Exception e) { Log.d("Exception", e.toString()); } return places; } // Executed after the complete execution of doInBackground() method @Override protected void onPostExecute(List<HashMap<String, String>> list) { Log.d("Map", "list size: " + list.size()); // Clears all the existing markers; mGoogleMap.clear(); for (int i = 0; i < list.size(); i++) { // Creating a marker MarkerOptions markerOptions = new MarkerOptions(); // Getting a place from the places list HashMap<String, String> hmPlace = list.get(i); // Getting latitude of the place double lat = Double.parseDouble(hmPlace.get("lat")); // Getting longitude of the place double lng = Double.parseDouble(hmPlace.get("lng")); // Getting name String name = hmPlace.get("place_name"); Log.d("Map", "place: " + name); // Getting vicinity String vicinity = hmPlace.get("vicinity"); LatLng latLng = new LatLng(lat, lng); // Setting the position for the marker markerOptions.position(latLng); markerOptions.title(name + " : " + vicinity); markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_MAGENTA)); // Placing a marker on the touched position Marker m = mGoogleMap.addMarker(markerOptions); } } } public class Place_JSON { /** * Receives a JSONObject and returns a list */ public List<HashMap<String, String>> parse(JSONObject jObject) { JSONArray jPlaces = null; try { /** Retrieves all the elements in the 'places' array */ jPlaces = jObject.getJSONArray("results"); } catch (JSONException e) { e.printStackTrace(); } /** Invoking getPlaces with the array of json object * where each json object represent a place */ return getPlaces(jPlaces); } private List<HashMap<String, String>> getPlaces(JSONArray jPlaces) { int placesCount = jPlaces.length(); List<HashMap<String, String>> placesList = new ArrayList<HashMap<String, String>>(); HashMap<String, String> place = null; /** Taking each place, parses and adds to list object */ for (int i = 0; i < placesCount; i++) { try { /** Call getPlace with place JSON object to parse the place */ place = getPlace((JSONObject) jPlaces.get(i)); placesList.add(place); } catch (JSONException e) { e.printStackTrace(); } } return placesList; } /** * Parsing the Place JSON object */ private HashMap<String, String> getPlace(JSONObject jPlace) { HashMap<String, String> place = new HashMap<String, String>(); String placeName = "-NA-"; String vicinity = "-NA-"; String latitude = ""; String longitude = ""; String reference = ""; try { // Extracting Place name, if available if (!jPlace.isNull("name")) { placeName = jPlace.getString("name"); } // Extracting Place Vicinity, if available if (!jPlace.isNull("vicinity")) { vicinity = jPlace.getString("vicinity"); } latitude = jPlace.getJSONObject("geometry").getJSONObject("location").getString("lat"); longitude = jPlace.getJSONObject("geometry").getJSONObject("location").getString("lng"); reference = jPlace.getString("reference"); place.put("place_name", placeName); place.put("vicinity", vicinity); place.put("lat", latitude); place.put("lng", longitude); place.put("reference", reference); } catch (JSONException e) { e.printStackTrace(); } return place; } }}activity_maps2.xml：<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent"> <fragment xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" xmlns:map="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent" android:layout_height="match_parent" android:id="@+id/map" tools:context="com.iotaconcepts.aurum.MapsActivity2" android:name="com.google.android.gms.maps.SupportMapFragment"/></LinearLayout>结果： (adsbygoogle = window.adsbygoogle || []).push({});