Android Maps app not finding the correct MapView

问题

I have made an app that uses Google Android Maps API V2 and I have followed every step in the guide provided by Google but it doesn't work unfortunely and it crashes every time I try to start it up.

The issue seem so be that it is not looking for com.google.android.gms.maps.MapView which is the MapView for the Android Maps API V2 but it's instead looking for com.google.android.maps.MapView which is the MapView for the Android Maps API V1 and I'm wondering how do I change that?

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

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();
    }
}

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"/>

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>

回答1:

Have you tried just inflating the xml layout normally with setContentView? Right now it looks like you're trying to make a fragment from an xml fragment.

回答2:

In activity_main.xml you shouldn't have a map fragment, since you add it programatically.
What I would do would be to change activity_mail.xml to contain a Framelayout that will be the fragment container. So for example:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >

   <FrameLayout
        android:id="@+id/fragment_container"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" />
</RelativeLayout>

after that in MainActivity.java you should findViewbyId for the Framelayout and add the mapfragment.
Also it is strange that you get an error for MapView but there isn't one in your code. Maybe you could post more of your code?

来源：https://stackoverflow.com/questions/15226429/android-maps-app-not-finding-the-correct-mapview