java - 我的谷歌地图 Android 应用程序不断崩溃

Question

我已经关注了 vogella 的两个教程和其他一些看起来相似的教程......非常相似但无济于事。我在 Nexus 7 上加载该应用程序，但它在启动时崩溃了“不幸的是 MyMapView 已停止工作”。这是 list :

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

<uses-sdk
    android:minSdkVersion="17"
    android:targetSdkVersion="17" />
<uses-feature
    android:glEsVersion="0x00020000"
    android:required="true"/>    
<permission
    android:name="com.macmozart.mymapview.permission.MAPS_RECEIVE"
    android:protectionLevel="signature" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<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" >
    <uses-library android:name="com.google.android.maps" />
    <activity
        android:name="com.macmozart.mymapview.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="AIzaSyBZ1Bt7rjB863Jy-B05zls6k8XZsBGQ6-4" />
</application>
</manifest>

接下来是我的主要布局:

<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>

最后是我的java类:

package com.macmozart.mymapview;

import android.app.Activity;
import android.os.Bundle;

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;
import com.google.android.maps.*;

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();

        if (map != null) {
            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)));
            map.moveCamera(CameraUpdateFactory.newLatLngZoom(HAMBURG, 15));
            // Zoom in, animating the camera.
            map.animateCamera(CameraUpdateFactory.zoomTo(10), 2000, null);

        }

    }
}

知道我做错了什么吗，我真的需要它才能工作

编辑:将 logcat 日志导出到我刚刚复制的 txt 文件后:

10-19 11:45:08.565: W/dalvikvm(638): Class resolved by unexpected DEX: Lcom/macmozart/mymapview/MainActivity;(0x4231c508):0x418ce000 ref [Lcom/google/android/maps/MapActivity;] Lcom/google/android/maps/MapActivity;(0x4231c508):0x40064000
10-19 11:45:08.565: W/dalvikvm(638): (Lcom/macmozart/mymapview/MainActivity; had used a different Lcom/google/android/maps/MapActivity; during pre-verification)
10-19 11:45:08.565: W/dalvikvm(638): Unable to resolve superclass of Lcom/macmozart/mymapview/MainActivity; (1310)
10-19 11:45:08.565: W/dalvikvm(638): Link of class 'Lcom/macmozart/mymapview/MainActivity;' failed
10-19 11:45:08.575: D/AndroidRuntime(638): Shutting down VM
10-19 11:45:08.575: W/dalvikvm(638): threadid=1: thread exiting with uncaught exception (group=0x41bbc700)
10-19 11:45:08.575: E/AndroidRuntime(638): FATAL EXCEPTION: main
10-19 11:45:08.575: E/AndroidRuntime(638): java.lang.IllegalAccessError: Class ref in pre-verified class resolved to unexpected implementation
10-19 11:45:08.575: E/AndroidRuntime(638):  at dalvik.system.DexFile.defineClass(Native Method)
10-19 11:45:08.575: E/AndroidRuntime(638):  at dalvik.system.DexFile.loadClassBinaryName(DexFile.java:211)
10-19 11:45:08.575: E/AndroidRuntime(638):  at dalvik.system.DexPathList.findClass(DexPathList.java:313)
10-19 11:45:08.575: E/AndroidRuntime(638):  at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:51)
10-19 11:45:08.575: E/AndroidRuntime(638):  at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
10-19 11:45:08.575: E/AndroidRuntime(638):  at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
10-19 11:45:08.575: E/AndroidRuntime(638):  at android.app.Instrumentation.newActivity(Instrumentation.java:1061)
10-19 11:45:08.575: E/AndroidRuntime(638):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2128)
10-19 11:45:08.575: E/AndroidRuntime(638):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
10-19 11:45:08.575: E/AndroidRuntime(638):  at android.app.ActivityThread.access$600(ActivityThread.java:141)
10-19 11:45:08.575: E/AndroidRuntime(638):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
10-19 11:45:08.575: E/AndroidRuntime(638):  at android.os.Handler.dispatchMessage(Handler.java:99)
10-19 11:45:08.575: E/AndroidRuntime(638):  at android.os.Looper.loop(Looper.java:137)
10-19 11:45:08.575: E/AndroidRuntime(638):  at android.app.ActivityThread.main(ActivityThread.java:5103)
10-19 11:45:08.575: E/AndroidRuntime(638):  at java.lang.reflect.Method.invokeNative(Native Method)
10-19 11:45:08.575: E/AndroidRuntime(638):  at java.lang.reflect.Method.invoke(Method.java:525)
10-19 11:45:08.575: E/AndroidRuntime(638):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
10-19 11:45:08.575: E/AndroidRuntime(638):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
10-19 11:45:08.575: E/AndroidRuntime(638):  at dalvik.system.NativeStart.main(Native Method)
10-19 11:45:10.905: I/Process(638): Sending signal. PID: 638 SIG: 9

Answer 1

问题是您的 MainActivity 类可能扩展了 com.google.android.maps.MapActivity。为了让系统能够找到这个类，您需要做两件事:

首先确保您的项目在构建路径中包含 Android Maps.jar。从Eclipse中找到

Project > Properties > Android

然后选择适合您的应用的“Google API”之一。您可以通过检查以下内容来确认maps.jar 位于您的构建路径中:

Project > Properties > Java Build Path > Libraries > Expand "Google Apis"

第二次浏览到您的 list 文件，并确保您在标签中嵌套了 use-library 代码段，如下所示:

<manifest>
...
   <application ...>
      <uses-library android:name="com.google.android.maps" />
      ...
   </application>
</manifest>

愿原力与你同在!