遵循Android教程的错误

我正在关注mybringback站点上的android教程。我遵循正确的，但我有一个错误，我不明白为什么：遵循Android教程的错误

public class Main extends MapActivity { 

    MapView map; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     map = (MapView) findViewById(R.id.mvMain); 
    } 

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

的logcat：

02-24 14:58:12.603: E/AndroidRuntime(1483): FATAL EXCEPTION: main

02-24 14:58:12.603: E/AndroidRuntime(1483): Process: com.prashant.maps, PID: 1483

02-24 14:58:12.603: E/AndroidRuntime(1483): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.prashant.maps/com.prashant.maps.Main}: android.view.InflateException: Binary XML file line #7: Error inflating class com.google.android.maps.Mapview

02-24 14:58:12.603: E/AndroidRuntime(1483): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2298)

02-24 14:58:12.603: E/AndroidRuntime(1483): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)

02-24 14:58:12.603: E/AndroidRuntime(1483): at android.app.ActivityThread.access$800(ActivityThread.java:144)

02-24 14:58:12.603: E/AndroidRuntime(1483): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)

02-24 14:58:12.603: E/AndroidRuntime(1483): at android.os.Handler.dispatchMessage(Handler.java:102)

02-24 14:58:12.603: E/AndroidRuntime(1483): at android.os.Looper.loop(Looper.java:135)

02-24 14:58:12.603: E/AndroidRuntime(1483): at android.app.ActivityThread.main(ActivityThread.java:5221)

02-24 14:58:12.603: E/AndroidRuntime(1483): at java.lang.reflect.Method.invoke(Native Method)

02-24 14:58:12.603: E/AndroidRuntime(1483): at java.lang.reflect.Method.invoke(Method.java:372)

02-24 14:58:12.603: E/AndroidRuntime(1483): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)

02-24 14:58:12.603: E/AndroidRuntime(1483): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)

02-24 14:58:12.603: E/AndroidRuntime(1483): Caused by: android.view.InflateException: Binary XML file line #7: Error inflating class com.google.android.maps.Mapview

02-24 14:58:12.603: E/AndroidRuntime(1483): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:757)

02-24 14:58:12.603: E/AndroidRuntime(1483): at android.view.LayoutInflater.rInflate(LayoutInflater.java:806)

02-24 14:58:12.603: E/AndroidRuntime(1483): at android.view.LayoutInflater.inflate(LayoutInflater.java:504)

02-24 14:58:12.603: E/AndroidRuntime(1483): at android.view.LayoutInflater.inflate(LayoutInflater.java:414)

02-24 14:58:12.603: E/AndroidRuntime(1483): at android.view.LayoutInflater.inflate(LayoutInflater.java:365)

02-24 14:58:12.603: E/AndroidRuntime(1483): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:377)

02-24 14:58:12.603: E/AndroidRuntime(1483): at android.app.Activity.setContentView(Activity.java:2144)

02-24 14:58:12.603: E/AndroidRuntime(1483): at com.prashant.maps.Main.onCreate(Main.java:15)

02-24 14:58:12.603: E/AndroidRuntime(1483): at android.app.Activity.performCreate(Activity.java:5933)

02-24 14:58:12.603: E/AndroidRuntime(1483): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)

02-24 14:58:12.603: E/AndroidRuntime(1483): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2251)

02-24 14:58:12.603: E/AndroidRuntime(1483): ... 10 more

02-24 14:58:12.603: E/AndroidRuntime(1483): Caused by: java.lang.ClassNotFoundException: Didn't find class "com.google.android.maps.Mapview" on path: DexPathList[[zip file "/system/framework/com.google.android.maps.jar", zip file "/data/app/com.prashant.maps-2/base.apk"],nativeLibraryDirectories=[/vendor/lib, /system/lib]]

02-24 14:58:12.603: E/AndroidRuntime(1483): at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)

02-24 14:58:12.603: E/AndroidRuntime(1483): at java.lang.ClassLoader.loadClass(ClassLoader.java:511)

02-24 14:58:12.603: E/AndroidRuntime(1483): at java.lang.ClassLoader.loadClass(ClassLoader.java:469)

02-24 14:58:12.603: E/AndroidRuntime(1483): at android.view.LayoutInflater.createView(LayoutInflater.java:571)

02-24 14:58:12.603: E/AndroidRuntime(1483): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:743)

02-24 14:58:12.603: E/AndroidRuntime(1483): ... 20 more

02-24 14:58:12.603: E/AndroidRuntime(1483): Suppressed: java.lang.ClassNotFoundException: com.google.android.maps.Mapview

02-24 14:58:12.603: E/AndroidRuntime(1483): at java.lang.Class.classForName(Native Method)

02-24 14:58:12.603: E/AndroidRuntime(1483): at java.lang.BootClassLoader.findClass(ClassLoader.java:781)

02-24 14:58:12.603: E/AndroidRuntime(1483): at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)

02-24 14:58:12.603: E/AndroidRuntime(1483): at java.lang.ClassLoader.loadClass(ClassLoader.java:504)

02-24 14:58:12.603: E/AndroidRuntime(1483): ... 23 more

02-24 14:58:12.603: E/AndroidRuntime(1483): Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack available

来源

2015-02-24 Prashant Chaudhari

它找不到MapView。您是否已将Google Play服务库加入您的应用中？如果使用Eclipse，您是否将API级别设置为Google Play版本，而不是AOSP版本？ – 2015-02-24 09:49:07

有可能不具备参考com.google.android .maps库。检查它是否包含在解决方案中（在构建路径，订单和导出选项卡中，应该检查此库），或者可以将其作为开源包含到项目中

来源

2015-02-24 09:57:39

问题是在xml文件中，或者您没有包含您项目中的GoogleplayServices。按照this教程将GooglePlayServices集成到您的项目中。此外，似乎您正在使用早期版本的GoogleMaps for Android，现在已弃用它。在Google Developers页面上关注教程。它并不像看起来那么强硬。至少试一试。你可以找到链接here

来源

2015-02-24 10:09:49 Roadblock

遵循Android教程的错误

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