我在GooGle map v2.project附近发现了一个发现，但没有错误但是在Logcat中找不到活动错误。
所以我认为问题出现在oncreate（）方法中，我设置了适配器。
请你把我的代码弄清楚。
MainActivity.java
public class MainActivity extends FragmentActivity implements LocationListener{
GoogleMap mGoogleMap;
Spinner mSprPlaceType;
String[] mPlaceType=null;
String[] mPlaceTypeName=null;
double mLatitude=0;
double mLongitude=0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Array of place types
mPlaceType = getResources().getStringArray(R.array.place_type);
// Array of place type names
mPlaceTypeName = getResources().getStringArray(R.array.place_type_name);
// Creating an array adapter with an array of Place types
// to populate the spinner
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_dropdown_item, mPlaceTypeName);
// Getting reference to the Spinner
mSprPlaceType = (Spinner) findViewById(R.id.spr_place_type);
// Setting adapter on Spinner to set place types
mSprPlaceType.setAdapter(adapter);
Button btnFind;
// Getting reference to Find Button
btnFind = ( Button ) findViewById(R.id.btn_find);
// Getting Google Play availability status
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 { // Google Play Services are available
// Getting reference to the SupportMapFragment
SupportMapFragment fragment = ( SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
// Getting Google Map
mGoogleMap = fragment.getMap();
// Enabling MyLocation in Google Map
mGoogleMap.setMyLocationEnabled(true);
// Getting LocationManager object from System Service LOCATION_SERVICE
LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
// Creating a criteria object to retrieve provider
Criteria criteria = new Criteria();
// Getting the name of the best provider
String provider = locationManager.getBestProvider(criteria, true);
// Getting Current Location From GPS
Location location = locationManager.getLastKnownLocation(provider);
if(location!=null){
onLocationChanged(location);
}
locationManager.requestLocationUpdates(provider, 20000, 0, this);
// Setting click event lister for the find button
btnFind.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
int selectedPosition = mSprPlaceType.getSelectedItemPosition();
String type = mPlaceType[selectedPosition];
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="+type);
sb.append("&sensor=true");
sb.append("&key=9C:6F:F6:C2:68:9F:EF:26:42:3F:6E:1F:79:8C:18:B3:0E:16:11:A9");
// Creating a new non-ui thread task to download Google place json data
PlacesTask placesTask = new PlacesTask();
// Invokes the "doInBackground()" method of the class PlaceTask
placesTask.execute(sb.toString());
}
});
}
}
/** A method to download json data from url */
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;
}
/** A class, to download Google Places */
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 ParseTask
parserTask.execute(result);
}
}
/** A class to parse the Google Places in JSON format */
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;
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;
}
// Executed after the complete execution of doInBackground() method
@Override
protected void onPostExecute(List<HashMap<String,String>> list){
// 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");
// 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);
}
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
@Override
public void onLocationChanged(Location location) {
mLatitude = location.getLatitude();
mLongitude = location.getLongitude();
LatLng latLng = new LatLng(mLatitude, mLongitude);
mGoogleMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
mGoogleMap.animateCamera(CameraUpdateFactory.zoomTo(12));
}
Logcat：
07-29 07:05:55.531: E/AndroidRuntime(847): java.lang.RuntimeException: Unable to start activity ComponentInfo{in.wptrafficanalyzer.locationnearby/in.wptrafficanalyzer.locationnearby.MainActivity}: android.view.InflateException: Binary XML file line #21: Error inflating class fragment
07-29 07:05:55.531: E/AndroidRuntime(847): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211)
07-29 07:05:55.531: E/AndroidRuntime(847): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
07-29 07:05:55.531: E/AndroidRuntime(847): at android.app.ActivityThread.access$600(ActivityThread.java:141)
07-29 07:05:55.531: E/AndroidRuntime(847): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
07-29 07:05:55.531: E/AndroidRuntime(847): at android.os.Handler.dispatchMessage(Handler.java:99)
07-29 07:05:55.531: E/AndroidRuntime(847): at android.os.Looper.loop(Looper.java:137)
07-29 07:05:55.531: E/AndroidRuntime(847): at android.app.ActivityThread.main(ActivityThread.java:5103)
07-29 07:05:55.531: E/AndroidRuntime(847): at java.lang.reflect.Method.invokeNative(Native Method)
07-29 07:05:55.531: E/AndroidRuntime(847): at java.lang.reflect.Method.invoke(Method.java:525)
07-29 07:05:55.531: E/AndroidRuntime(847): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
07-29 07:05:55.531: E/AndroidRuntime(847): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
07-29 07:05:55.531: E/AndroidRuntime(847): at dalvik.system.NativeStart.main(Native Method)
07-29 07:05:55.531: E/AndroidRuntime(847): Caused by: android.view.InflateException: Binary XML file line #21: Error inflating class fragment
07-29 07:05:55.531: E/AndroidRuntime(847): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:713)
07-29 07:05:55.531: E/AndroidRuntime(847): at android.view.LayoutInflater.rInflate(LayoutInflater.java:755)
07-29 07:05:55.531: E/AndroidRuntime(847): at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
07-29 07:05:55.531: E/AndroidRuntime(847): at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
07-29 07:05:55.531: E/AndroidRuntime(847): at android.view.LayoutInflater.inflate(LayoutInflater.java:353)
07-29 07:05:55.531: E/AndroidRuntime(847): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:267)
07-29 07:05:55.531: E/AndroidRuntime(847): at android.app.Activity.setContentView(Activity.java:1895)
07-29 07:05:55.531: E/AndroidRuntime(847): at in.wptrafficanalyzer.locationnearby.MainActivity.onCreate(MainActivity.java:56)
07-29 07:05:55.531: E/AndroidRuntime(847): at android.app.Activity.performCreate(Activity.java:5133)
07-29 07:05:55.531: E/AndroidRuntime(847): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
07-29 07:05:55.531: E/AndroidRuntime(847): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)
07-29 07:05:55.531: E/AndroidRuntime(847): ... 11 more
07-29 07:05:55.531: E/AndroidRuntime(847): Caused by: java.lang.IllegalStateException: The meta-data tag in your app's AndroidManifest.xml does not have the right value. Expected 7571000 but found 0. You must have the following declaration within the <application> element: <meta-data android:name="com.google.android.gms.version" android:value="@integer/google_play_services_version" />
07-29 07:05:55.531: E/AndroidRuntime(847): at com.google.android.gms.common.GooglePlayServicesUtil.zzaa(Unknown Source)
07-29 07:05:55.531: E/AndroidRuntime(847): at com.google.android.gms.common.GooglePlayServicesUtil.isGooglePlayServicesAvailable(Unknown Source)
07-29 07:05:55.531: E/AndroidRuntime(847): at com.google.android.gms.maps.internal.zzy.zzaz(Unknown Source)
07-29 07:05:55.531: E/AndroidRuntime(847): at com.google.android.gms.maps.internal.zzy.zzay(Unknown Source)
07-29 07:05:55.531: E/AndroidRuntime(847): at com.google.android.gms.maps.MapsInitializer.initialize(Unknown Source)
07-29 07:05:55.531: E/AndroidRuntime(847): at com.google.android.gms.maps.SupportMapFragment$zzb.zzvu(Unknown Source)
07-29 07:05:55.531: E/AndroidRuntime(847): at com.google.android.gms.maps.SupportMapFragment$zzb.zza(Unknown Source)
07-29 07:05:55.531: E/AndroidRuntime(847): at com.google.android.gms.dynamic.zza.zza(Unknown Source)
07-29 07:05:55.531: E/AndroidRuntime(847): at com.google.android.gms.dynamic.zza.onInflate(Unknown Source)
07-29 07:05:55.531: E/AndroidRuntime(847): at com.google.android.gms.maps.SupportMapFragment.onInflate(Unknown Source)
07-29 07:05:55.531: E/AndroidRuntime(847): at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:279)
07-29 07:05:55.531: E/AndroidRuntime(847): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:685)
答案 0 :(得分：0)
我认为你应该改变
SupportMapFragment fragment = ( SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
到
SupportMapFragment fragment = ((SupportMapFragment) getChildFragmentManager()
.findFragmentById(R.id.map));
有关详细信息，请查看this answer ...
答案 1 :(得分：0)
您应该在布局文件中添加这些行
<fragment
android:id="@+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true" />
我认为您使用的是com.google.android.gms.maps.MapFragment。