不幸的是，应用程序已停止使用谷歌地图v2

Question

我对android没有太多经验。我正在开发一个应用程序，它将显示当前位置，并使用谷歌地图Api v2和google places api搜索附近的地方。当我尝试在模拟器上运行应用程序时，它表示未安装Google Play服务。但那没关系。然后它说“不幸的是app已停止”。当我在真实设备上运行时（使用Google Play服务）也是如此。我试着寻找答案并查看logcat。但没有任何帮助。也许是因为我是新手，无法理解确切的错误。这些是相关的各种文件。如果需要任何其他信息，我会发布。如果有人帮忙，我会很高兴！ 谢谢。

MainActivity.java

package n.nearby;

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.HashMap;
import java.util.List;

import org.json.JSONObject;

import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesUtil;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;

import android.app.Dialog;
import android.location.Criteria;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.Spinner;

public class MainActivity extends FragmentActivity implements LocationListener{


GoogleMap mGoogleMap;
Spinner mSprPlaceType;
String[] mPlaceType=null;
String[] mPlaceTypeName=null;
double mLat=0;
double mLang=0;

/* (non-Javadoc)
 * @see android.support.v4.app.FragmentActivity#onCreate(android.os.Bundle)
 */
@Override
protected void onCreate(Bundle arg0) {
    // TODO Auto-generated method stub
    super.onCreate(arg0);
    setContentView(R.layout.activity_main);

    mPlaceType = getResources().getStringArray(R.array.place_type);
    mPlaceTypeName = getResources().getStringArray(R.array.place_type_name);
    ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_dropdown_item, mPlaceTypeName);
    mSprPlaceType = (Spinner) findViewById(R.id.spr_place_type);
    mSprPlaceType.setAdapter(adapter);

    Button btnFind;
    btnFind = (Button) findViewById(R.id.btn_find);
    int status = GooglePlayServicesUtil.isGooglePlayServicesAvailable(getBaseContext());

    if(status!=ConnectionResult.SUCCESS){ // Google Play Services are not available

        int requestCode = 10;
        Dialog dialog = GooglePlayServicesUtil.getErrorDialog(status, this, requestCode);
        dialog.show();
    }

    else{

        SupportMapFragment fragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
        mGoogleMap = fragment.getMap();
        mGoogleMap.setMyLocationEnabled(true);
        LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);

        Criteria criteria = new Criteria();
        String provider = locationManager.getBestProvider(criteria, true);

        Location loc = locationManager.getLastKnownLocation(provider);
        if(loc != null){
            onLocationChanged(loc);
        }
        locationManager.requestLocationUpdates(provider, 2000, 0, this);

        btnFind.setOnClickListener(new OnClickListener(){

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                int selectedPosition = mSprPlaceType.getSelectedItemPosition();
                String type = mPlaceType[selectedPosition];

                StringBuilder sb = new StringBuilder("https://maps.googleapis.com/maps/api/place/nearbysearch/json?");
                sb.append("location="+mLat+","+mLang+"");
                sb.append("&radius=5000");
                sb.append("&types="+type);
                sb.append("&sensor=true");
                sb.append("&key=AIzaSyD9rJCxxxxxxxxxxxxxxxxxxxxxxxxxxxx");

                PlacesTask placesTask = new PlacesTask();
                placesTask.execute(sb.toString());
            }

        });
    }
}

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 while downloading url", e.toString());
    }finally{
        iStream.close();
        urlConnection.disconnect();
    }

    return data;

}

public class PlacesTask extends AsyncTask<String, Integer, String> {

    String data = null;

    @Override
    protected String doInBackground(String... url) {
        // TODO Auto-generated method stub
        try{
            data = downloadUrl(url[0]);
        }catch(Exception e){
            Log.d("Background Task", e.toString());
        }
        return data;
    }

    @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 ParseTask
            parserTask.execute(result);
    }
    }

public class ParserTask extends AsyncTask<String, Integer, List<HashMap<String,String>>>{

    JSONObject jObject;
    @Override
    protected List<HashMap<String, String>> doInBackground(String... jsonData) {
        // TODO Auto-generated method stub
        List<HashMap<String, String>> places = null;
        PlaceJSONParser placeJsonParser = new PlaceJSONParser();
        try{
            jObject = new JSONObject(jsonData[0]);

            /** Getting the parsed data as a List construct */
            places = placeJsonParser.parse(jObject);

        }catch(Exception e){
            Log.d("Exception",e.toString());
        }
        return places ;
    }
    @Override
    protected void onPostExecute(List<HashMap<String, String>> list) {
        // TODO Auto-generated method stub
        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");

            // Getting vicinity
            String vicinity = hmPlace.get("vicinity");

            LatLng latLng = new LatLng(lat, lng);

            // Setting the position for the marker
            markerOptions.position(latLng);

            // Setting the title for the marker.
            //This will be displayed on taping the marker
            markerOptions.title(name + " : " + vicinity);

            // Placing a marker on the touched position
            mGoogleMap.addMarker(markerOptions);
        }

    }


}
public boolean onCreateOptionsMenu(Menu menu){
    getMenuInflater().inflate(R.layout.activity_main, menu);
    return true;    
    }

public void onLocationChanged(Location location) {
    mLat = location.getLatitude();
    mLang = location.getLongitude();
    LatLng latLng = new LatLng(mLat, mLang);

    mGoogleMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
    mGoogleMap.animateCamera(CameraUpdateFactory.zoomTo(12));

}

public void onProviderDisabled(String provider) {
    // TODO Auto-generated method stub

}

public void onProviderEnabled(String provider) {
    // TODO Auto-generated method stub

}

public void onStatusChanged(String provider, int status, Bundle extras) {
    // TODO Auto-generated method stub

}
}

用于识别所选搜索的分析器类

package n.nearby;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

public class PlaceJSONParser {


/** 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="";

    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");

        place.put("place_name", placeName);
        place.put("vicinity", vicinity);
        place.put("lat", latitude);
        place.put("lng", longitude);

    } catch (JSONException e) {
        e.printStackTrace();
    }
    return place;
}
}

activity_main.xml中

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity" >

<Spinner
    android:id="@+id/spr_place_type"
    android:layout_width="wrap_content"
    android:layout_height="60dp"
    android:layout_alignParentTop="true" />

<Button
    android:id="@+id/btn_find"
    android:layout_width="wrap_content"
    android:layout_height="60dp"
    android:layout_alignParentTop="true"
    android:layout_toRightOf="@id/spr_place_type"
    android:text="@string/str_btn_find" />

<fragment 
    android:id="@+id/map"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@id/spr_place_type"
    class="com.google.android.gms.maps.SupportMapFragment" />

附近的清单

    <?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="n.nearby"
    android:versionCode="1"
    android:versionName="1.0" >

<uses-sdk
    android:minSdkVersion="8"
    android:targetSdkVersion="19" />

<permission 
    android:name="n.nearby.permission.MAPS_RECEIVE"
    android:protectionLevel="signature"></permission>

<uses-permission android:name="n.nearby.permission.MAPS_RECEIVE"/>
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

<uses-feature
    android:glEsVersion="0x00020000"
    android:required="true"/>

<application 
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name="n.nearby.MainActivity"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>

     <meta-data
        android:name="com.google.android.maps.v2.API_KEY"
        android:value="AIzaSyD9rJCxxxxxxxxxxxxxxxxxxxxxxxxxxxx"/>
     <meta-data
        android:name="com.google.android.gms.version"
        android:value="@integer/google_play_services_version" />


</application>

</manifest>

此外，我刚刚将activity_main.xml复制到fragment_main.xml中。我正在使用支持库，并使用了SupportMapFragment而不是MapFragment。

这是更新的logcat文件

 FATAL EXCEPTION: main
 Process: n.nearby, PID: 1291
 android.content.ActivityNotFoundException: No Activity found to handle Intent { act=android.intent.action.VIEW dat=market://details?id=com.google.android.gms flg=0x80000 pkg=com.android.vending }
    at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1632)
    at android.app.Instrumentation.execStartActivity(Instrumentation.java:1424)
    at android.app.Activity.startActivityForResult(Activity.java:3424)
    at android.app.Activity.startActivityForResult(Activity.java:3385)
    at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:839)
    at android.app.Activity.startActivity(Activity.java:3627)
    at android.app.Activity.startActivity(Activity.java:3595)
    at com.google.android.gms.dynamic.a$5.onClick(Unknown Source)
    at android.view.View.performClick(View.java:4438)
    at android.view.View$PerformClick.run(View.java:18422)
    at android.os.Handler.handleCallback(Handler.java:733)
    at android.os.Handler.dispatchMessage(Handler.java:95)
    at android.os.Looper.loop(Looper.java:136)
    at android.app.ActivityThread.main(ActivityThread.java:5017)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:515)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
    at dalvik.system.NativeStart.main(Native Method)
 Sending signal. PID: 1291 SIG: 9

Answer 1

问题出在这一行

    getMenuInflater().inflate(R.layout.activity_main, menu);

它应该是这样的

    getMenuInflater().inflate(R.menu.menu_layout, menu);

您添加了对Layout的引用，该引用应该是对菜单的引用。