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我正在尝试使用 maps api v2 for android 实现一个应用程序。这是我正在使用的代码

<?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"
          android:name="com.google.android.gms.maps.SupportMapFragment"/>

主要活动是

package com.example.nav3;

import android.os.Bundle;
import android.app.Activity;
import android.support.v4.app.FragmentActivity;
import android.view.Menu;

public class MainActivity2 extends FragmentActivity {

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

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main_activity2, menu);
        return true;
    }

}

清单是这个

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.nav3"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="17"
        android:targetSdkVersion="17" />

    <permission
        android:name="com.example.nav3.permission.MAPS_RECEIVE"
        android:protectionLevel="signature" />

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

    <uses-permission android:name="com.example.nav3.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:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.nav3.MainActivity2"
            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 comes here" />
    </application>

</manifest>

不过，在运行该应用程序时，我只看到缩放控件，但看不到任何地图。为什么会这样？谢谢

堆栈跟踪

08-24 22:58:41.482: D/AndroidRuntime(3083): Shutting down VM
08-24 22:58:41.482: W/dalvikvm(3083): threadid=1: thread exiting with uncaught exception (group=0x41552700)
08-24 22:58:41.502: D/dalvikvm(3083): GC_FOR_ALLOC freed 285K, 4% free 9093K/9404K, paused 15ms, total 15ms
08-24 22:58:41.512: E/AndroidRuntime(3083): FATAL EXCEPTION: main
08-24 22:58:41.512: E/AndroidRuntime(3083): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.nav3/com.example.nav3.MainActivity2}: android.view.InflateException: Binary XML file line #2: Error inflating class fragment
08-24 22:58:41.512: E/AndroidRuntime(3083):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211)
08-24 22:58:41.512: E/AndroidRuntime(3083):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
08-24 22:58:41.512: E/AndroidRuntime(3083):     at android.app.ActivityThread.access$600(ActivityThread.java:141)
08-24 22:58:41.512: E/AndroidRuntime(3083):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
08-24 22:58:41.512: E/AndroidRuntime(3083):     at android.os.Handler.dispatchMessage(Handler.java:99)
08-24 22:58:41.512: E/AndroidRuntime(3083):     at android.os.Looper.loop(Looper.java:137)
08-24 22:58:41.512: E/AndroidRuntime(3083):     at android.app.ActivityThread.main(ActivityThread.java:5103)
08-24 22:58:41.512: E/AndroidRuntime(3083):     at java.lang.reflect.Method.invokeNative(Native Method)
08-24 22:58:41.512: E/AndroidRuntime(3083):     at java.lang.reflect.Method.invoke(Method.java:525)
08-24 22:58:41.512: E/AndroidRuntime(3083):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
08-24 22:58:41.512: E/AndroidRuntime(3083):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
08-24 22:58:41.512: E/AndroidRuntime(3083):     at dalvik.system.NativeStart.main(Native Method)
08-24 22:58:41.512: E/AndroidRuntime(3083): Caused by: android.view.InflateException: Binary XML file line #2: Error inflating class fragment
08-24 22:58:41.512: E/AndroidRuntime(3083):     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:713)
08-24 22:58:41.512: E/AndroidRuntime(3083):     at android.view.LayoutInflater.inflate(LayoutInflater.java:469)
08-24 22:58:41.512: E/AndroidRuntime(3083):     at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
08-24 22:58:41.512: E/AndroidRuntime(3083):     at android.view.LayoutInflater.inflate(LayoutInflater.java:353)
08-24 22:58:41.512: E/AndroidRuntime(3083):     at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:267)
08-24 22:58:41.512: E/AndroidRuntime(3083):     at android.app.Activity.setContentView(Activity.java:1895)
08-24 22:58:41.512: E/AndroidRuntime(3083):     at com.example.nav3.MainActivity2.onCreate(MainActivity2.java:13)
08-24 22:58:41.512: E/AndroidRuntime(3083):     at android.app.Activity.performCreate(Activity.java:5133)
08-24 22:58:41.512: E/AndroidRuntime(3083):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
08-24 22:58:41.512: E/AndroidRuntime(3083):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)
08-24 22:58:41.512: E/AndroidRuntime(3083):     ... 11 more
08-24 22:58:41.512: E/AndroidRuntime(3083): Caused by: java.lang.IllegalStateException: Fragment com.google.android.gms.maps.MapFragment did not create a view.
08-24 22:58:41.512: E/AndroidRuntime(3083):     at android.app.Activity.onCreateView(Activity.java:4769)
08-24 22:58:41.512: E/AndroidRuntime(3083):     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:689)
08-24 22:58:41.512: E/AndroidRuntime(3083):     ... 20 more
4

3 回答 3

0

检查您正在使用所有权限是不是这些是以下权限

<permission
        android:name="yourpackagename.permission.MAPS_RECEIVE"
        android:protectionLevel="signature" />

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

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

并检查 wheather api 密钥是否有效检查您的设备网络连接。

于 2013-08-24T18:15:50.810 回答
0

你需要使用MapFragmentnot SupportMapFragment。

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

您还需要扩展标准Activity

确保您有正确的导入语句

于 2013-08-24T17:18:44.107 回答
0

检查您是否使用在 Google API 控制台中为其生成 API 密钥的证书签署应用程序（确保您使用的是 Google Maps Android API v2 而不是 Google Maps API v2）。

还要确保您正在测试您的应用程序的设备支持 OpenGL ES 2.0。

于 2013-08-24T17:23:47.750 回答