我正在按照本教程获取附近的位置，我按照教程执行了每一步。但是当我运行我的应用程序时，出现以下错误：
10-08 10:57:37.125: E/dalvikvm(758): Could not find class 'com.google.api.client.http.javanet.NetHttpTransport', referenced from method com.androidhive.googleplacesandmaps.GooglePlaces.<clinit>
10-08 10:57:37.475: E/dalvikvm(758): Could not find class 'com.androidhive.googleplacesandmaps.GooglePlaces$1', referenced from method com.androidhive.googleplacesandmaps.GooglePlaces.createRequestFactory
10-08 10:57:37.515: E/dalvikvm(758): Could not find class 'com.google.api.client.http.GenericUrl', referenced from method com.androidhive.googleplacesandmaps.GooglePlaces.getPlaceDetails
10-08 10:57:37.566: E/dalvikvm(758): Could not find class 'com.google.api.client.http.GenericUrl', referenced from method com.androidhive.googleplacesandmaps.GooglePlaces.search
10-08 10:57:37.645: E/AndroidRuntime(758): FATAL EXCEPTION: AsyncTask #1
10-08 10:57:37.645: E/AndroidRuntime(758): java.lang.RuntimeException: An error occured while executing doInBackground()
10-08 10:57:37.645: E/AndroidRuntime(758): at android.os.AsyncTask$3.done(AsyncTask.java:266)
10-08 10:57:37.645: E/AndroidRuntime(758): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
10-08 10:57:37.645: E/AndroidRuntime(758): at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
10-08 10:57:37.645: E/AndroidRuntime(758): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
10-08 10:57:37.645: E/AndroidRuntime(758): at java.util.concurrent.FutureTask.run(FutureTask.java:137)
10-08 10:57:37.645: E/AndroidRuntime(758): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1081)
10-08 10:57:37.645: E/AndroidRuntime(758): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:574)
10-08 10:57:37.645: E/AndroidRuntime(758): at java.lang.Thread.run(Thread.java:1020)
10-08 10:57:37.645: E/AndroidRuntime(758): Caused by: java.lang.ExceptionInInitializerError
10-08 10:57:37.645: E/AndroidRuntime(758): at com.androidhive.googleplacesandmaps.MainActivity$LoadPlaces.doInBackground(MainActivity.java:170)
10-08 10:57:37.645: E/AndroidRuntime(758): at com.androidhive.googleplacesandmaps.MainActivity$LoadPlaces.doInBackground(MainActivity.java:1)
10-08 10:57:37.645: E/AndroidRuntime(758): at android.os.AsyncTask$2.call(AsyncTask.java:252)
10-08 10:57:37.645: E/AndroidRuntime(758): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
10-08 10:57:37.645: E/AndroidRuntime(758): ... 4 more
10-08 10:57:37.645: E/AndroidRuntime(758): Caused by: java.lang.NoClassDefFoundError: com.google.api.client.http.javanet.NetHttpTransport
10-08 10:57:37.645: E/AndroidRuntime(758): at com.androidhive.googleplacesandmaps.GooglePlaces.<clinit>(GooglePlaces.java:23)
10-08 10:57:37.645: E/AndroidRuntime(758): ... 8 more
10-08 10:57:38.715: E/WindowManager(758): Activity com.androidhive.googleplacesandmaps.MainActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@40936600 that was originally added here
10-08 10:57:38.715: E/WindowManager(758): android.view.WindowLeaked: Activity com.androidhive.googleplacesandmaps.MainActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@40936600 that was originally added here
10-08 10:57:38.715: E/WindowManager(758): at android.view.ViewRoot.<init>(ViewRoot.java:288)
10-08 10:57:38.715: E/WindowManager(758): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:249)
10-08 10:57:38.715: E/WindowManager(758): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:193)
10-08 10:57:38.715: E/WindowManager(758): at android.view.WindowManagerImpl$CompatModeWrapper.addView(WindowManagerImpl.java:118)
10-08 10:57:38.715: E/WindowManager(758): at android.view.Window$LocalWindowManager.addView(Window.java:532)
10-08 10:57:38.715: E/WindowManager(758): at android.app.Dialog.show(Dialog.java:269)
10-08 10:57:38.715: E/WindowManager(758): at com.androidhive.googleplacesandmaps.MainActivity$LoadPlaces.onPreExecute(MainActivity.java:162)
10-08 10:57:38.715: E/WindowManager(758): at android.os.AsyncTask.executeOnExecutor(AsyncTask.java:549)
10-08 10:57:38.715: E/WindowManager(758): at android.os.AsyncTask.execute(AsyncTask.java:499)
10-08 10:57:38.715: E/WindowManager(758): at com.androidhive.googleplacesandmaps.MainActivity.onCreate(MainActivity.java:102)
10-08 10:57:38.715: E/WindowManager(758): at android.app.Activity.performCreate(Activity.java:4397)
10-08 10:57:38.715: E/WindowManager(758): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1048)
10-08 10:57:38.715: E/WindowManager(758): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1779)
10-08 10:57:38.715: E/WindowManager(758): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1831)
10-08 10:57:38.715: E/WindowManager(758): at android.app.ActivityThread.access$500(ActivityThread.java:122)
10-08 10:57:38.715: E/WindowManager(758): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1024)
10-08 10:57:38.715: E/WindowManager(758): at android.os.Handler.dispatchMessage(Handler.java:99)
10-08 10:57:38.715: E/WindowManager(758): at android.os.Looper.loop(Looper.java:132)
10-08 10:57:38.715: E/WindowManager(758): at android.app.ActivityThread.main(ActivityThread.java:4123)
10-08 10:57:38.715: E/WindowManager(758): at java.lang.reflect.Method.invokeNative(Native Method)
10-08 10:57:38.715: E/WindowManager(758): at java.lang.reflect.Method.invoke(Method.java:491)
10-08 10:57:38.715: E/WindowManager(758): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841)
10-08 10:57:38.715: E/WindowManager(758): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
10-08 10:57:38.715: E/WindowManager(758): at dalvik.system.NativeStart.main(Native Method)
10-08 11:04:08.085: E/dalvikvm(794): Could not find class 'com.google.api.client.http.javanet.NetHttpTransport', referenced from method com.androidhive.googleplacesandmaps.GooglePlaces.<clinit>
10-08 11:04:08.435: E/dalvikvm(794): Could not find class 'com.androidhive.googleplacesandmaps.GooglePlaces$1', referenced from method com.androidhive.googleplacesandmaps.GooglePlaces.createRequestFactory
10-08 11:04:08.485: E/dalvikvm(794): Could not find class 'com.google.api.client.http.GenericUrl', referenced from method com.androidhive.googleplacesandmaps.GooglePlaces.getPlaceDetails
10-08 11:04:08.655: E/dalvikvm(794): Could not find class 'com.google.api.client.http.GenericUrl', referenced from method com.androidhive.googleplacesandmaps.GooglePlaces.search
10-08 11:04:08.685: E/AndroidRuntime(794): FATAL EXCEPTION: AsyncTask #1
10-08 11:04:08.685: E/AndroidRuntime(794): java.lang.RuntimeException: An error occured while executing doInBackground()
10-08 11:04:08.685: E/AndroidRuntime(794): at android.os.AsyncTask$3.done(AsyncTask.java:266)
10-08 11:04:08.685: E/AndroidRuntime(794): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
10-08 11:04:08.685: E/AndroidRuntime(794): at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
10-08 11:04:08.685: E/AndroidRuntime(794): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
10-08 11:04:08.685: E/AndroidRuntime(794): at java.util.concurrent.FutureTask.run(FutureTask.java:137)
10-08 11:04:08.685: E/AndroidRuntime(794): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1081)
10-08 11:04:08.685: E/AndroidRuntime(794): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:574)
10-08 11:04:08.685: E/AndroidRuntime(794): at java.lang.Thread.run(Thread.java:1020)
10-08 11:04:08.685: E/AndroidRuntime(794): Caused by: java.lang.ExceptionInInitializerError
10-08 11:04:08.685: E/AndroidRuntime(794): at com.androidhive.googleplacesandmaps.MainActivity$LoadPlaces.doInBackground(MainActivity.java:170)
10-08 11:04:08.685: E/AndroidRuntime(794): at com.androidhive.googleplacesandmaps.MainActivity$LoadPlaces.doInBackground(MainActivity.java:1)
10-08 11:04:08.685: E/AndroidRuntime(794): at android.os.AsyncTask$2.call(AsyncTask.java:252)
10-08 11:04:08.685: E/AndroidRuntime(794): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
10-08 11:04:08.685: E/AndroidRuntime(794): ... 4 more
10-08 11:04:08.685: E/AndroidRuntime(794): Caused by: java.lang.NoClassDefFoundError: com.google.api.client.http.javanet.NetHttpTransport
10-08 11:04:08.685: E/AndroidRuntime(794): at com.androidhive.googleplacesandmaps.GooglePlaces.<clinit>(GooglePlaces.java:23)
10-08 11:04:08.685: E/AndroidRuntime(794): ... 8 more
10-08 11:04:09.786: E/WindowManager(794): Activity com.androidhive.googleplacesandmaps.MainActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@409365d0 that was originally added here
10-08 11:04:09.786: E/WindowManager(794): android.view.WindowLeaked: Activity com.androidhive.googleplacesandmaps.MainActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@409365d0 that was originally added here
10-08 11:04:09.786: E/WindowManager(794): at android.view.ViewRoot.<init>(ViewRoot.java:288)
10-08 11:04:09.786: E/WindowManager(794): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:249)
10-08 11:04:09.786: E/WindowManager(794): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:193)
10-08 11:04:09.786: E/WindowManager(794): at android.view.WindowManagerImpl$CompatModeWrapper.addView(WindowManagerImpl.java:118)
10-08 11:04:09.786: E/WindowManager(794): at android.view.Window$LocalWindowManager.addView(Window.java:532)
10-08 11:04:09.786: E/WindowManager(794): at android.app.Dialog.show(Dialog.java:269)
10-08 11:04:09.786: E/WindowManager(794): at com.androidhive.googleplacesandmaps.MainActivity$LoadPlaces.onPreExecute(MainActivity.java:162)
10-08 11:04:09.786: E/WindowManager(794): at android.os.AsyncTask.executeOnExecutor(AsyncTask.java:549)
10-08 11:04:09.786: E/WindowManager(794): at android.os.AsyncTask.execute(AsyncTask.java:499)
10-08 11:04:09.786: E/WindowManager(794): at com.androidhive.googleplacesandmaps.MainActivity.onCreate(MainActivity.java:102)
10-08 11:04:09.786: E/WindowManager(794): at android.app.Activity.performCreate(Activity.java:4397)
10-08 11:04:09.786: E/WindowManager(794): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1048)
10-08 11:04:09.786: E/WindowManager(794): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1779)
10-08 11:04:09.786: E/WindowManager(794): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1831)
10-08 11:04:09.786: E/WindowManager(794): at android.app.ActivityThread.access$500(ActivityThread.java:122)
10-08 11:04:09.786: E/WindowManager(794): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1024)
10-08 11:04:09.786: E/WindowManager(794): at android.os.Handler.dispatchMessage(Handler.java:99)
10-08 11:04:09.786: E/WindowManager(794): at android.os.Looper.loop(Looper.java:132)
10-08 11:04:09.786: E/WindowManager(794): at android.app.ActivityThread.main(ActivityThread.java:4123)
10-08 11:04:09.786: E/WindowManager(794): at java.lang.reflect.Method.invokeNative(Native Method)
10-08 11:04:09.786: E/WindowManager(794): at java.lang.reflect.Method.invoke(Method.java:491)
10-08 11:04:09.786: E/WindowManager(794): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841)
10-08 11:04:09.786: E/WindowManager(794): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
10-08 11:04:09.786: E/WindowManager(794): at dalvik.system.NativeStart.main(Native Method)
10-08 11:08:51.366: E/dalvikvm(826): Could not find class 'com.google.api.client.http.javanet.NetHttpTransport', referenced from method com.androidhive.googleplacesandmaps.GooglePlaces.<clinit>
10-08 11:08:51.806: E/dalvikvm(826): Could not find class 'com.androidhive.googleplacesandmaps.GooglePlaces$1', referenced from method com.androidhive.googleplacesandmaps.GooglePlaces.createRequestFactory
10-08 11:08:51.885: E/dalvikvm(826): Could not find class 'com.google.api.client.http.GenericUrl', referenced from method com.androidhive.googleplacesandmaps.GooglePlaces.getPlaceDetails
10-08 11:08:51.935: E/dalvikvm(826): Could not find class 'com.google.api.client.http.GenericUrl', referenced from method com.androidhive.googleplacesandmaps.GooglePlaces.search
10-08 11:08:52.035: E/AndroidRuntime(826): FATAL EXCEPTION: AsyncTask #1
10-08 11:08:52.035: E/AndroidRuntime(826): java.lang.RuntimeException: An error occured while executing doInBackground()
10-08 11:08:52.035: E/AndroidRuntime(826): at android.os.AsyncTask$3.done(AsyncTask.java:266)
10-08 11:08:52.035: E/AndroidRuntime(826): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
10-08 11:08:52.035: E/AndroidRuntime(826): at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
10-08 11:08:52.035: E/AndroidRuntime(826): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
10-08 11:08:52.035: E/AndroidRuntime(826): at java.util.concurrent.FutureTask.run(FutureTask.java:137)
10-08 11:08:52.035: E/AndroidRuntime(826): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1081)
10-08 11:08:52.035: E/AndroidRuntime(826): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:574)
10-08 11:08:52.035: E/AndroidRuntime(826): at java.lang.Thread.run(Thread.java:1020)
10-08 11:08:52.035: E/AndroidRuntime(826): Caused by: java.lang.ExceptionInInitializerError
10-08 11:08:52.035: E/AndroidRuntime(826): at com.androidhive.googleplacesandmaps.MainActivity$LoadPlaces.doInBackground(MainActivity.java:170)
10-08 11:08:52.035: E/AndroidRuntime(826): at com.androidhive.googleplacesandmaps.MainActivity$LoadPlaces.doInBackground(MainActivity.java:1)
10-08 11:08:52.035: E/AndroidRuntime(826): at android.os.AsyncTask$2.call(AsyncTask.java:252)
10-08 11:08:52.035: E/AndroidRuntime(826): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
10-08 11:08:52.035: E/AndroidRuntime(826): ... 4 more
10-08 11:08:52.035: E/AndroidRuntime(826): Caused by: java.lang.NoClassDefFoundError: com.google.api.client.http.javanet.NetHttpTransport
10-08 11:08:52.035: E/AndroidRuntime(826): at com.androidhive.googleplacesandmaps.GooglePlaces.<clinit>(GooglePlaces.java:23)
10-08 11:08:52.035: E/AndroidRuntime(826): ... 8 more
10-08 11:08:53.145: E/WindowManager(826): Activity com.androidhive.googleplacesandmaps.MainActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@40936608 that was originally added here
10-08 11:08:53.145: E/WindowManager(826): android.view.WindowLeaked: Activity com.androidhive.googleplacesandmaps.MainActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@40936608 that was originally added here
10-08 11:08:53.145: E/WindowManager(826): at android.view.ViewRoot.<init>(ViewRoot.java:288)
10-08 11:08:53.145: E/WindowManager(826): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:249)
10-08 11:08:53.145: E/WindowManager(826): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:193)
10-08 11:08:53.145: E/WindowManager(826): at android.view.WindowManagerImpl$CompatModeWrapper.addView(WindowManagerImpl.java:118)
10-08 11:08:53.145: E/WindowManager(826): at android.view.Window$LocalWindowManager.addView(Window.java:532)
10-08 11:08:53.145: E/WindowManager(826): at android.app.Dialog.show(Dialog.java:269)
10-08 11:08:53.145: E/WindowManager(826): at com.androidhive.googleplacesandmaps.MainActivity$LoadPlaces.onPreExecute(MainActivity.java:162)
10-08 11:08:53.145: E/WindowManager(826): at android.os.AsyncTask.executeOnExecutor(AsyncTask.java:549)
10-08 11:08:53.145: E/WindowManager(826): at android.os.AsyncTask.execute(AsyncTask.java:499)
10-08 11:08:53.145: E/WindowManager(826): at com.androidhive.googleplacesandmaps.MainActivity.onCreate(MainActivity.java:102)
10-08 11:08:53.145: E/WindowManager(826): at android.app.Activity.performCreate(Activity.java:4397)
10-08 11:08:53.145: E/WindowManager(826): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1048)
10-08 11:08:53.145: E/WindowManager(826): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1779)
10-08 11:08:53.145: E/WindowManager(826): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1831)
10-08 11:08:53.145: E/WindowManager(826): at android.app.ActivityThread.access$500(ActivityThread.java:122)
10-08 11:08:53.145: E/WindowManager(826): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1024)
10-08 11:08:53.145: E/WindowManager(826): at android.os.Handler.dispatchMessage(Handler.java:99)
10-08 11:08:53.145: E/WindowManager(826): at android.os.Looper.loop(Looper.java:132)
10-08 11:08:53.145: E/WindowManager(826): at android.app.ActivityThread.main(ActivityThread.java:4123)
10-08 11:08:53.145: E/WindowManager(826): at java.lang.reflect.Method.invokeNative(Native Method)
10-08 11:08:53.145: E/WindowManager(826): at java.lang.reflect.Method.invoke(Method.java:491)
10-08 11:08:53.145: E/WindowManager(826): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841)
10-08 11:08:53.145: E/WindowManager(826): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
10-08 11:08:53.145: E/WindowManager(826): at dalvik.system.NativeStart.main(Native Method)
我搜索以解决错误，但无法成功。我怎样才能克服这些错误？或者任何人都可以为我提供更好的解决方案来找到附近的位置吗？
