问题
I've used my app on my phone(Samsung Galaxy S3, 4.1.2) as people adviced me to when it comes to android map v2 apps but I still get the same error where it says that my app has unfortuntely stopped.
MainActivity.java
package com.example.name;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import com.google.android.gms.maps.SupportMapFragment;
public class MainActivity extends FragmentActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
SupportMapFragment fragment = new SupportMapFragment();
getSupportFragmentManager().beginTransaction()
.add(android.R.id.content, fragment).commit();
}
}
Manifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.name"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="16" />
<permission
android:name="com.example.name.permission.MAPS_RECEIVE"
android:protectionLevel="signature" />
<uses-permission android:name="com.example.name.permission.MAPS_RECEIVE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme"
android:debuggable="true" >
<activity
android:name="com.example.name.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="**api_key**" />
</application>
<uses-feature
android:glEsVersion="0x00020000"
android:required="true" />
</manifest>
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/map"
android:layout_width="wrap_content"
android:layout_height="match_parent"
class="com.google.android.gms.maps.SupportMapFragment"/>
Logcat
03-04 00:26:51.274: E/dalvikvm(14369): Could not find class 'com.google.android.maps.MapView', referenced from method com.cornboyzmaps.googlemapsA.MainActivity.onCreate
03-04 00:26:51.279: W/dalvikvm(14369): VFY: unable to resolve check-cast 465 (Lcom/google/android/maps/MapView;) in Lcom/cornboyzmaps/googlemapsA/MainActivity;
03-04 00:26:51.279: D/dalvikvm(14369): VFY: replacing opcode 0x1f at 0x0014
03-04 00:26:51.279: D/dalvikvm(14369): DexOpt: unable to opt direct call 0x0cdf at 0x34 in Lcom/cornboyzmaps/googlemapsA/MainActivity;.onCreate
03-04 00:26:51.344: D/AndroidRuntime(14369): Shutting down VM
03-04 00:26:51.344: W/dalvikvm(14369): threadid=1: thread exiting with uncaught exception (group=0x413832a0)
03-04 00:26:51.354: E/AndroidRuntime(14369): FATAL EXCEPTION: main
03-04 00:26:51.354: E/AndroidRuntime(14369): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.cornboyzmaps.googlemapsA/com.cornboyzmaps.googlemapsA.MainActivity}: android.view.InflateException: Binary XML file line #8: Error inflating class fragment
03-04 00:26:51.354: E/AndroidRuntime(14369): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2100)
03-04 00:26:51.354: E/AndroidRuntime(14369): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2125)
03-04 00:26:51.354: E/AndroidRuntime(14369): at android.app.ActivityThread.access$600(ActivityThread.java:140)
03-04 00:26:51.354: E/AndroidRuntime(14369): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1227)
03-04 00:26:51.354: E/AndroidRuntime(14369): at android.os.Handler.dispatchMessage(Handler.java:99)
03-04 00:26:51.354: E/AndroidRuntime(14369): at android.os.Looper.loop(Looper.java:137)
03-04 00:26:51.354: E/AndroidRuntime(14369): at android.app.ActivityThread.main(ActivityThread.java:4898)
03-04 00:26:51.354: E/AndroidRuntime(14369): at java.lang.reflect.Method.invokeNative(Native Method)
03-04 00:26:51.354: E/AndroidRuntime(14369): at java.lang.reflect.Method.invoke(Method.java:511)
03-04 00:26:51.354: E/AndroidRuntime(14369): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1006)
03-04 00:26:51.354: E/AndroidRuntime(14369): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:773)
03-04 00:26:51.354: E/AndroidRuntime(14369): at dalvik.system.NativeStart.main(Native Method)
03-04 00:26:51.354: E/AndroidRuntime(14369): Caused by: android.view.InflateException: Binary XML file line #8: Error inflating class fragment
03-04 00:26:51.354: E/AndroidRuntime(14369): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
03-04 00:26:51.354: E/AndroidRuntime(14369): at android.view.LayoutInflater.rInflate(LayoutInflater.java:746)
03-04 00:26:51.354: E/AndroidRuntime(14369): at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
03-04 00:26:51.354: E/AndroidRuntime(14369): at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
03-04 00:26:51.354: E/AndroidRuntime(14369): at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
03-04 00:26:51.354: E/AndroidRuntime(14369): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:308)
03-04 00:26:51.354: E/AndroidRuntime(14369): at android.app.Activity.setContentView(Activity.java:1924)
03-04 00:26:51.354: E/AndroidRuntime(14369): at com.cornboyzmaps.googlemapsA.MainActivity.onCreate(MainActivity.java:21)
03-04 00:26:51.354: E/AndroidRuntime(14369): at android.app.Activity.performCreate(Activity.java:5206)
03-04 00:26:51.354: E/AndroidRuntime(14369): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1083)
03-04 00:26:51.354: E/AndroidRuntime(14369): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2064)
03-04 00:26:51.354: E/AndroidRuntime(14369): ... 11 more
03-04 00:26:51.354: E/AndroidRuntime(14369): Caused by: android.app.Fragment$InstantiationException: Unable to instantiate fragment com.google.android.gms.maps.SupportMapFragment: make sure class name exists, is public, and has an empty constructor that is public
03-04 00:26:51.354: E/AndroidRuntime(14369): at android.app.Fragment.instantiate(Fragment.java:584)
03-04 00:26:51.354: E/AndroidRuntime(14369): at android.app.Fragment.instantiate(Fragment.java:552)
03-04 00:26:51.354: E/AndroidRuntime(14369): at android.app.Activity.onCreateView(Activity.java:4849)
03-04 00:26:51.354: E/AndroidRuntime(14369): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:680)
03-04 00:26:51.354: E/AndroidRuntime(14369): ... 21 more
03-04 00:26:51.354: E/AndroidRuntime(14369): Caused by: java.lang.ClassNotFoundException: com.google.android.gms.maps.SupportMapFragment
03-04 00:26:51.354: E/AndroidRuntime(14369): at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:61)
03-04 00:26:51.354: E/AndroidRuntime(14369): at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
03-04 00:26:51.354: E/AndroidRuntime(14369): at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
03-04 00:26:51.354: E/AndroidRuntime(14369): at android.app.Fragment.instantiate(Fragment.java:574)
03-04 00:26:51.354: E/AndroidRuntime(14369): ... 24 more
回答1:
Somehow, you are missing the code for the Maps V2 library in your project. You need to correctly attach to the Android library project representing the Play Services SDK. See the Play Services documentation, specifically the part beginning with "To set up a project to use the Google Play services SDK".
回答2:
I got this error when i imported the Google_Play_Services_lib to eclipse without checking the option of Copy Project to Workspace.See the picture
Also check my blogPost i have tried to explain the problems
回答3:
If you're on the SDK tools v17 that came out after Google I/O, check if any of these help here:
http://xrigau.wordpress.com/2012/03/22/fix-some-problems-with-libraries-in-the-adt-17-plugin-10/
http://android.foxykeep.com/dev/how-to-fix-the-classdefnotfounderror-with-adt-17
来源：https://stackoverflow.com/questions/15192334/android-maps-v2-application-crashes-on-phone