Question

基本上我正在尝试创建一个显示Google Map的应用。这是我的代码。

    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/LinearLayout1"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    >
   <com.google.android.maps.MapView
    android:id="@+id/mapView"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:enabled="true"
    android:clickable="true"
    android:apiKey="my key goes here"
    />
</LinearLayout>

MainActivity类......

import com.google.android.maps.MapActivity;

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

public class MainActivity extends MapActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
}

@Override
protected boolean isRouteDisplayed() {
    // TODO Auto-generated method stub
    return false;
   }


}

当我运行它时，我收到以下消息

06-22 15:54:03.622: E/AndroidRuntime(26187): FATAL EXCEPTION: main
06-22 15:54:03.622: E/AndroidRuntime(26187): java.lang.RuntimeException: 
Unable to    instantiate activity
ComponentInfo{com.example.maptutorial/com.example.maptutorial.MainActivity}: 
java.lang.ClassNotFoundException: com.example.maptutorial.MainActivity

也许我可能在我的清单文件中做错了什么，看不到它..

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

<uses-sdk
    android:minSdkVersion="8"
    android:targetSdkVersion="18" />

<uses-permission android:name="android.permission.INTERNET"/>

<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name="com.example.maptutorial.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>
  </application>

</manifest>

Answer 1

您忘记在清单文件中添加uses-library，在本例中为

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

Answer 2

基本上我不得不使用像这样的SupportMapFragment使它适用于android 2.3。还必须创建一个新的API密钥..

<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.SupportMapFragment" />

</RelativeLayout>

我的java代码示例就是这样。

 public class EmergencyMap extends FragmentActivity {
 static final LatLng ASTYNOMIA = new LatLng(39.620530, 22.401728);
 static final LatLng PYROSVESTIKH = new LatLng(39.632652, 22.398704);                            
 static final LatLng genikonosokomeio = new LatLng(39.642081, 22.422350);
 static final LatLng panosokomeio = new LatLng(39.609993, 22.385722);

private GoogleMap map;
final int RQS_GooglePlayServices = 1;

@Override
 protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_emergency_map);

    map = ((SupportMapFragment)getSupportFragmentManager()
            .findFragmentById(R.id.map)).getMap();

    map.addMarker(new MarkerOptions().position(ASTYNOMIA).title("ΑΣΤΥΝΟΜΙΑ"));
    map.moveCamera(CameraUpdateFactory.newLatLngZoom(ASTYNOMIA,15));
    map.animateCamera(CameraUpdateFactory.zoomTo(20),2000,null);


    map.addMarker(new MarkerOptions().position(PYROSVESTIKH).title("ΠΥΡΟΣΒΕΣΤΙΚΗ"));
    map.moveCamera(CameraUpdateFactory.newLatLngZoom(PYROSVESTIKH,15));
    map.animateCamera(CameraUpdateFactory.zoomTo(20),2000,null);

    map.addMarker(new MarkerOptions().position(genikonosokomeio).title("ΓΕΝΙΚΟ 
    ΝΟΣΟΚΟΜΕΙΟ"));
    map.moveCamera(CameraUpdateFactory.newLatLngZoom(genikonosokomeio,15));
    map.animateCamera(CameraUpdateFactory.zoomTo(20),2000,null);

    map.addMarker(new MarkerOptions().position(panosokomeio).title("ΠΑΝΕΠΙΣΤΗΜΙΑΚΟ 

    ΝΟΣΟΚΟΜΕΙΟ"));
    map.moveCamera(CameraUpdateFactory.newLatLngZoom(panosokomeio,15));
    map.animateCamera(CameraUpdateFactory.zoomTo(20),2000,null);

    map.setMapType(GoogleMap.MAP_TYPE_HYBRID);
}

protected void onResume() {
    super.onResume();

    int resultCode = 
    GooglePlayServicesUtil.isGooglePlayServicesAvailable(getApplicationContext());
    if (resultCode == ConnectionResult.SUCCESS){
        Toast.makeText(getApplicationContext(), 
                "Το κινητό σας υποστηρίζει GooglePlayServices", 
                Toast.LENGTH_LONG).show();          
    }else{
    GooglePlayServicesUtil.getErrorDialog(resultCode, this,RQS_GooglePlayServices); 
    }
}

}

Answer 3

我认为您使用的是不推荐使用的MAP API版本1。为什么不能使用API 2片段或支持片段（https://developers.google.com/maps/documentation/android/start）

<fragment xmlns:android="http://schemas.android.com/apk/res/android"
      android:id="@+id/map"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:name="com.google.android.gms.maps.MapFragment"/>

清单文件

<uses-feature
    android:glEsVersion="0x00020000"
    android:required="true" />
<meta-data
        android:name="com.google.android.maps.v2.API_KEY"
        android:value="AIzaSyC8qEhdHVd3ZtxCR0549UqwnM72h0jgoMY" />

Answer 4

这是Google Map API 2.这是我的清单文件的一部分。

<uses-sdk
    android:minSdkVersion="8"
    android:targetSdkVersion="19" />
  <permission
    android:name="com.example.larissaguide.permission.MAPS_RECEIVE"
    android:protectionLevel="signature" />

<uses-permission android:name="larissa.app.permission.MAPS_RECEIVE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<!--
 The following two permissions are not required to use
 Google Maps Android API v2, but are recommended.
-->
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

<uses-feature
    android:glEsVersion="0x00020000"
    android:required="true" />
<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name="larissa.app.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="MY_KEY_GOES_HERE" />
    <meta-data
        android:name="com.google.android.gms.version"
        android:value="@integer/google_play_services_version" />

Android Google Map classNotFound异常

4 个答案: