Android 谷歌地图 fragment 崩溃

Question

如 Google 教程所述，我已将 Google Maps V2 嵌入到我的应用程序中。

切换到 map fragment 时出现以下错误。

03-08 12:52:01.600: E/AndroidRuntime(30314):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2105)

03-08 12:52:01.600: E/AndroidRuntime(30314): FATAL EXCEPTION: main

03-08 12:52:01.600: E/AndroidRuntime(30314): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{de.arvidg.exampleactionbartabs/de.arvidg.exampleactionbartabs.StartActivity}: 
java.lang.ClassNotFoundException: de.arvidg.exampleactionbartabs.StartActivity

这是源码

package de.arvidg.exampleactionbartabs;

import com.google.android.gms.common.GooglePlayServicesUtil;
import com.google.android.gms.common.GooglePlayServicesUtil;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.MapFragment;
import com.google.android.maps.MapActivity;

import data.Device;
import data.Mission;
import de.arvidg.exampleactionbartabs.R;
import logic.FetchData;
import android.app.Fragment;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;

public class MapFrag extends MapFragment {

    protected FetchData thread;
    protected Device device;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {

        final View lView = inflater.inflate(R.layout.map, container,
                false);

        return lView;

    }

    public void setDumb() {

    }

    public Device getDevice() {
        return device;
    }

    public void setDevice(Device device) {
        this.device = device;
    }

}


            <?xml version="1.0" encoding="utf-8"?>
            <fragment xmlns:android="http://schemas.android.com/apk/res/android"
             android:id="@+id/map"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
             class="com.google.android.gms.maps.SupportMapFragment"/>

我的 list

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

    <uses-sdk android:minSdkVersion="14" />

    <permission
        android:name="de.arvidg.exampleactionbartabs.permission.MAPS_RECEIVE"
        android:protectionLevel="signature" />

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

    <uses-permission android:name="de.arvidg.exampleactionbartabs.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:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:name=".StartActivity"
            android:label="@string/app_name"
            android:theme="@android:style/Theme.Holo" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name=".MapFrag"
            android:label="Map"
            android:theme="@android:style/Theme.Holo" >
            <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="removed" />

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

</manifest>

Answer 1

改变

android:name="com.google.android.gms.maps.MapFragment"/>到

android:name="com.google.android.gms.maps.SupportMapFragment"/> activity_main.xml

和改变

公共(public)类 MainActivity 扩展 Activity

到public class MainActivity extends FragmentActivity in MainActivity.java

这两个修复对我有用。