Android 使用SupportMapFragment的NullPointerException

几天来我一直在努力解决这个问题。我喜欢谷歌地图和SupportMapFragment。当我启动我的应用程序时，日志显示此错误和我的应用程序崩溃

这是我的日志猫：

12-05 11:16:03.437    6931-6931/it.home.dressgallery E/dalvikvm﹕ Could not find class 'android.app.Notification$Builder', referenced from method com.google.android.gms.common.GooglePlayServicesUtil.showErrorNotification
12-05 11:16:08.406    6931-6931/it.home.dressgallery E/dalvikvm﹕ Could not find class 'android.app.Notification$Builder', referenced from method com.google.android.gms.common.l.c
12-05 11:16:08.601    6931-6931/it.home.dressgallery E/AndroidRuntime﹕ FATAL EXCEPTION: main
    java.lang.NullPointerException
            at com.google.maps.api.android.lib6.c.aa.b(Unknown Source)
            at com.google.android.gms.maps.internal.x.onTransact(SourceFile:115)
            at android.os.Binder.transact(Binder.java:279)
            at com.google.android.gms.maps.internal.IMapFragmentDelegate$a$a.onResume(Unknown Source)
            at com.google.android.gms.maps.SupportMapFragment$a.onResume(Unknown Source)
            at com.google.android.gms.dynamic.a$7.b(Unknown Source)
            at com.google.android.gms.dynamic.a.a(Unknown Source)
            at com.google.android.gms.dynamic.a.onResume(Unknown Source)
            at com.google.android.gms.maps.SupportMapFragment.onResume(Unknown Source)
            at android.support.v4.app.Fragment.performResume(Fragment.java:1547)
            at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:978)
            at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1121)
            at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682)
            at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1484)
            at android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:482)
            at android.support.v4.app.FragmentStatePagerAdapter.finishUpdate(FragmentStatePagerAdapter.java:163)
            at android.support.v4.view.ViewPager.populate(ViewPager.java:1073)
            at android.support.v4.view.ViewPager.populate(ViewPager.java:919)
            at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1441)
            at android.view.View.measure(View.java:8366)
            at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3138)
            at android.widget.FrameLayout.onMeasure(FrameLayout.java:250)
            at android.view.View.measure(View.java:8366)
            at android.widget.LinearLayout.measureVertical(LinearLayout.java:531)
            at android.widget.LinearLayout.onMeasure(LinearLayout.java:309)
            at android.view.View.measure(View.java:8366)
            at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3138)
            at android.widget.FrameLayout.onMeasure(FrameLayout.java:250)
            at android.view.View.measure(View.java:8366)
            at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3138)
            at android.widget.FrameLayout.onMeasure(FrameLayout.java:250)
            at android.view.View.measure(View.java:8366)
            at android.view.ViewRoot.performTraversals(ViewRoot.java:844)
            at android.view.ViewRoot.handleMessage(ViewRoot.java:1865)
            at android.os.Handler.dispatchMessage(Handler.java:99)
            at android.os.Looper.loop(Looper.java:130)
            at android.app.ActivityThread.main(ActivityThread.java:3687)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:507)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:842)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
            at dalvik.system.NativeStart.main(Native Method)

以下是我的AndroidManifest.xml：

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

    <uses-sdk android:minSdkVersion="7" android:targetSdkVersion="19" />

    <permission
        android:name="it.home.dressgallery.permission.MAPS_RECEIVE"
        android:protectionLevel="signature" />
    <uses-permission android:name="it.home.dressgallery.permission.MAPS_RECEIVE" />

    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES"/>
    <!-- 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/AppBaseTheme"
        android:hardwareAccelerated="true" >


        <meta-data android:name="com.google.android.gms.version"
            android:value="@integer/google_play_services_version" />

        <meta-data
            android:name="com.google.android.maps.v2.API_KEY"
            android:value="myapikey"/>

        <activity
            android:name="it.home.dressgallery.MeinActivity"
            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>

我希望有人能帮我，因为我吓坏了。谢谢

您的

片段的
super.onCreateView
在哪里
因此，解决方案是添加以下行：

super.onCreateView(inflater, container, savedInstanceState);

如果没有它，您的
onCreateView（）
方法将毫无用处

解决方案：

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    super.onCreateView(inflater, container, savedInstanceState);
   
    View view = inflater.inflate(R.layout.maps_layout, container, false);

    initializeMap();
    myAddMarker(latitude, longitude, BitmapDescriptorFactory.HUE_ORANGE);
    googleMap.setMyLocationEnabled(true); // false to disable
    googleMap.getUiSettings().setZoomControlsEnabled(false); // true to enable
    googleMap.getUiSettings().setCompassEnabled(true);
    googleMap.getUiSettings().setMyLocationButtonEnabled(true);
    //googleMap.getUiSettings().setRotateGesturesEnabled(true);

    Marker hamburg = googleMap.addMarker(new MarkerOptions().position(HAMBURG)
            .title("Hamburg"));
    Marker kiel = googleMap.addMarker(new MarkerOptions()
            .position(KIEL)
            .title("Kiel")
            .snippet("Kiel is cool")
            .icon(BitmapDescriptorFactory
                    .fromResource(R.drawable.ic_launcher)));

    // Move the camera instantly to hamburg with a zoom of 15.
    googleMap.moveCamera(CameraUpdateFactory.newLatLngZoom(HAMBURG, 15));

    // Zoom in, animating the camera.
    googleMap.animateCamera(CameraUpdateFactory.zoomTo(10), 2000, null);

    return view;
}

非常感谢你！！！现在我的应用程序没有崩溃。第一个错误是什么：E/dalvikvm﹕ 找不到从方法com.google.android.gms.common.GooglePlayServicesUtil.淋浴通知12-05 11:16:08.406 6931-6931/it.home.dressgallery E/dalvikvm引用的类“android.app.Notification$Builder”﹕ 找不到从方法com.google.android.gms.common.l.csi引用的类“android.app.Notification$Builder”，因为您正在使用较低的api 7
Notification.Builder已添加到api级别11中。对于早期版本，应改用NotificationCompat.Builder。
请尝试理解代码，而不仅仅是复制粘贴。。祝你快乐
super.onCreateView(inflater, container, savedInstanceState);

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    super.onCreateView(inflater, container, savedInstanceState);
   
    View view = inflater.inflate(R.layout.maps_layout, container, false);

    initializeMap();
    myAddMarker(latitude, longitude, BitmapDescriptorFactory.HUE_ORANGE);
    googleMap.setMyLocationEnabled(true); // false to disable
    googleMap.getUiSettings().setZoomControlsEnabled(false); // true to enable
    googleMap.getUiSettings().setCompassEnabled(true);
    googleMap.getUiSettings().setMyLocationButtonEnabled(true);
    //googleMap.getUiSettings().setRotateGesturesEnabled(true);

    Marker hamburg = googleMap.addMarker(new MarkerOptions().position(HAMBURG)
            .title("Hamburg"));
    Marker kiel = googleMap.addMarker(new MarkerOptions()
            .position(KIEL)
            .title("Kiel")
            .snippet("Kiel is cool")
            .icon(BitmapDescriptorFactory
                    .fromResource(R.drawable.ic_launcher)));

    // Move the camera instantly to hamburg with a zoom of 15.
    googleMap.moveCamera(CameraUpdateFactory.newLatLngZoom(HAMBURG, 15));

    // Zoom in, animating the camera.
    googleMap.animateCamera(CameraUpdateFactory.zoomTo(10), 2000, null);

    return view;
}