问题
I am trying to run a basic example of Google maps API v2 from http://www.vogella.com/articles/AndroidGoogleMaps/article.html but it keeps crashing with an error:
02-10 14:51:38.292: E/AndroidRuntime(898): FATAL EXCEPTION: main
02-10 14:51:38.292: E/AndroidRuntime(898): java.lang.NoClassDefFoundError: com.google.android.gms.R$styleable
02-10 14:51:38.292: E/AndroidRuntime(898): at com.google.android.gms.maps.GoogleMapOptions.createFromAttributes(Unknown Source)
02-10 14:51:38.292: E/AndroidRuntime(898): at com.google.android.gms.maps.MapFragment.onInflate(Unknown Source)
02-10 14:51:38.292: E/AndroidRuntime(898): at android.app.Activity.onCreateView(Activity.java:4716)
02-10 14:51:38.292: E/AndroidRuntime(898): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:680)
02-10 14:51:38.292: E/AndroidRuntime(898): at android.view.LayoutInflater.rInflate(LayoutInflater.java:746)
02-10 14:51:38.292: E/AndroidRuntime(898): at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
02-10 14:51:38.292: E/AndroidRuntime(898): at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
02-10 14:51:38.292: E/AndroidRuntime(898): at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
02-10 14:51:38.292: E/AndroidRuntime(898): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:270)
02-10 14:51:38.292: E/AndroidRuntime(898): at android.app.Activity.setContentView(Activity.java:1881)
02-10 14:51:38.292: E/AndroidRuntime(898): at com.vogella.android.locationapi.maps.MainActivity.onCreate(MainActivity.java:23)
02-10 14:51:38.292: E/AndroidRuntime(898): at android.app.Activity.performCreate(Activity.java:5104)
02-10 14:51:38.292: E/AndroidRuntime(898): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
02-10 14:51:38.292: E/AndroidRuntime(898): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
02-10 14:51:38.292: E/AndroidRuntime(898): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
02-10 14:51:38.292: E/AndroidRuntime(898): at android.app.ActivityThread.access$600(ActivityThread.java:141)
02-10 14:51:38.292: E/AndroidRuntime(898): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
02-10 14:51:38.292: E/AndroidRuntime(898): at android.os.Handler.dispatchMessage(Handler.java:99)
02-10 14:51:38.292: E/AndroidRuntime(898): at android.os.Looper.loop(Looper.java:137)
02-10 14:51:38.292: E/AndroidRuntime(898): at android.app.ActivityThread.main(ActivityThread.java:5039)
02-10 14:51:38.292: E/AndroidRuntime(898): at java.lang.reflect.Method.invokeNative(Native Method)
02-10 14:51:38.292: E/AndroidRuntime(898): at java.lang.reflect.Method.invoke(Method.java:511)
02-10 14:51:38.292: E/AndroidRuntime(898): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
02-10 14:51:38.292: E/AndroidRuntime(898): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
02-10 14:51:38.292: E/AndroidRuntime(898): at dalvik.system.NativeStart.main(Native Method)
my code...
manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.vogella.android.locationapi.maps"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="17"
android:targetSdkVersion="17" />
<permission
android:name="com.example.mapdemo.permission.MAPS_RECEIVE"
android:protectionLevel="signature" />
<uses-feature
android:glEsVersion="0x00020000"
android:required="true" />
<uses-permission android:name="com.example.mapdemo.permission.MAPS_RECEIVE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.vogella.android.locationapi.maps.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="{tried both browser api key and android api keys here}" />
</application>
</manifest>
layout:
<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" >
<fragment
android:id="@+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="com.google.android.gms.maps.MapFragment" />
</RelativeLayout>
Activity:
package com.vogella.android.locationapi.maps;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.MapFragment;
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;
public class MainActivity extends Activity {
static final LatLng HAMBURG = new LatLng(53.558, 9.927);
static final LatLng KIEL = new LatLng(53.551, 9.993);
private GoogleMap map;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
map = ((MapFragment) getFragmentManager().findFragmentById(R.id.map)).getMap();
Marker hamburg = map.addMarker(new MarkerOptions().position(HAMBURG).title("Hamburg"));
Marker kiel =
map.addMarker(new MarkerOptions()
.position(KIEL)
.title("Kiel")
.snippet("Kiel is cool")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.ic_launcher)));
// Move the camera instantly to hamburg with a zoom of 15.
map.moveCamera(CameraUpdateFactory.newLatLngZoom(HAMBURG, 15));
// Zoom in, animating the camera.
map.animateCamera(CameraUpdateFactory.zoomTo(10), 2000, null);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
}
of ran it on an AVD with target Google API 17, it crashes immediately.
回答1:
I noticed you have not added protection for Google Play Services, the Google Maps V2 api requires this to run.
The issue maybe due to Google Play Services not being supported on AVD. Try running on a device.
maybe these can help
Missing Google Play Services from AVD
https://stackoverflow.com/a/14282347/1788333
回答2:
You should extend FragmentActivity than Activity.
Use this in your activity: map = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)).getMap();
And in xml in fragment tag write this:
class="com.google.android.gms.maps.SupportMapFragment"
来源：https://stackoverflow.com/questions/14799081/google-maps-api-v2