Android ClassNotFoundException帶Google Maps API

My Home Activity正試圖啓動LocationSetter MapActivity。Android ClassNotFoundException帶Google Maps API

這裏是主活動的相關線：

  try 
     { 
      Intent locationSetter = new Intent(Home.this, Class.forName("LocationSetter")); 
      startActivity(locationSetter); 
      overridePendingTransition(android.R.anim.fade_in, android.R.anim.fade_out); 
     } catch (ClassNotFoundException e1) 
     { 
      Log.v(TAG, e1.toString()); 
     }

此代碼捕獲上實例化的類變量的行一個ClassNotFoundException。我不認爲使用Class.forName（）是必要的，直到LocationSetter.class開始拋出異常，try catch循環只是方便的，因爲程序不會每次都崩潰。

接下來是LocationSetter MapActivity：

package com.knox.vicinity; 

import android.os.Bundle; 
import android.widget.LinearLayout; 
import com.google.android.maps.*; 

public class LocationSetter extends MapActivity 
{ 

public void onCreate(Bundle savedInstanceState) 
{ 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.locationsetter); 

    MapView mapView = (MapView) findViewById(R.id.mapView); 
    mapView.setBuiltInZoomControls(true); 
} 

public void onBackPressed() 
{ 
    super.onBackPressed(); 
    overridePendingTransition(android.R.anim.fade_in, android.R.anim.fade_out); 
} 

protected boolean isRouteDisplayed() 
{ 
    return false; 
} 
}

我不認爲有什麼不對的代碼。

我檢查是否所有的活動和庫在清單中聲明：

<?xml version="1.0" encoding="utf-8"?> 
<manifest 
android:versionCode="1" 
android:versionName="1.0" 
package="com.knox.vicinity" 
xmlns:android="http://schemas.android.com/apk/res/android" 
> 
<uses-sdk 
    android:targetSdkVersion="10" /> 
<uses-library 
    android:name="com.google.android.maps" /> 
<uses-permission 
    android:name="android.permission.INTERNET" 
></uses-permission> 
<uses-permission 
    android:name="android.permission.ACCESS_COARSE_LOCATION" 
></uses-permission> 
<uses-permission 
    android:name="android.permission.ACCESS_FINE_LOCATION" 
></uses-permission> 
<uses-permission 
    android:name="android.permission.ACCESS_LOCATION_EXTRA_COMMANDS" 
></uses-permission> 
<uses-permission 
    android:name="android.permission.ACCESS_MOCK_LOCATION" 
></uses-permission> 
<application 
    android:label="@string/app_name" 
    android:debuggable="true" 
    android:icon="@drawable/ic_launcher_vicinity" 
> 
    <uses-library 
     android:name="com.google.android.maps" 
     android:required="true" /> 
    <activity 
     android:name=".Splash" 
     android:theme="@android:style/Theme.NoTitleBar" 
    > 
     <intent-filter> 
      <action 
       android:name="android.intent.action.MAIN" /> 
      <category 
       android:name="android.intent.category.LAUNCHER" /> 
     </intent-filter> 
    </activity> 
    <activity 
     android:name=".Home" 
     android:theme="@android:style/Theme.NoTitleBar" 
    > 
    </activity> 
    <activity 
     android:name=".LocationSetter" 
     android:theme="@android:style/Theme.NoTitleBar" 
    ></activity> 
</application> 
</manifest>

locationsetter.xml：

<?xml version="1.0" encoding="utf-8"?> 
<com.google.android.maps.MapView 
xmlns:android="http://schemas.android.com/apk/res/android" 
android:orientation="vertical" 
android:id="@+id/mapView" 
android:layout_width="fill_parent" 
android:layout_height="fill_parent" 
android:clickable="true" 
android:apiKey="xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" />

我不知道我在做什麼錯在這裏。我有使用Google API的10級（其中包括谷歌地圖庫）聲明的Android項目。我在日食中沒有相關的警告或錯誤。我很確定我的API密鑰是正確的。

爲什麼LocationSetter找不到？

提前致謝。

編輯：

堆棧跟蹤：

08-26 02:04:55.506: ERROR/dalvikvm(15748): Could not find class 'com.knox.vicinity.LocationSetter', referenced from method com.knox.vicinity.Home.onOptionsItemSelected 

08-26 02:04:58.905: ERROR/AndroidRuntime(15748): FATAL EXCEPTION: main 

08-26 02:04:58.905: ERROR/AndroidRuntime(15748): java.lang.NoClassDefFoundError: com.knox.vicinity.LocationSetter 

08-26 02:04:58.905: ERROR/AndroidRuntime(15748):  at com.knox.vicinity.Home.onOptionsItemSelected(Home.java:45) 

08-26 02:04:58.905: ERROR/AndroidRuntime(15748):  at android.app.Activity.onMenuItemSelected(Activity.java:2251) 

08-26 02:04:58.905: ERROR/AndroidRuntime(15748):  at com.android.internal.policy.impl.PhoneWindow.onMenuItemSelected(PhoneWindow.java:809) 

08-26 02:04:58.905: ERROR/AndroidRuntime(15748):  at com.android.internal.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:143) 

08-26 02:04:58.905: ERROR/AndroidRuntime(15748):  at com.android.internal.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:855) 

08-26 02:04:58.905: ERROR/AndroidRuntime(15748):  at com.android.internal.view.menu.IconMenuView.invokeItem(IconMenuView.java:553) 

08-26 02:04:58.905: ERROR/AndroidRuntime(15748):  at com.android.internal.view.menu.IconMenuItemView.performClick(IconMenuItemView.java:122) 

08-26 02:04:58.905: ERROR/AndroidRuntime(15748):  at android.view.View$PerformClick.run(View.java:9089) 

08-26 02:04:58.905: ERROR/AndroidRuntime(15748):  at android.os.Handler.handleCallback(Handler.java:587) 

08-26 02:04:58.905: ERROR/AndroidRuntime(15748):  at android.os.Handler.dispatchMessage(Handler.java:92) 

08-26 02:04:58.905: ERROR/AndroidRuntime(15748):  at android.os.Looper.loop(Looper.java:123) 

08-26 02:04:58.905: ERROR/AndroidRuntime(15748):  at android.app.ActivityThread.main(ActivityThread.java:3806) 

08-26 02:04:58.905: ERROR/AndroidRuntime(15748):  at java.lang.reflect.Method.invokeNative(Native Method) 

08-26 02:04:58.905: ERROR/AndroidRuntime(15748):  at java.lang.reflect.Method.invoke(Method.java:507) 

08-26 02:04:58.905: ERROR/AndroidRuntime(15748):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 

08-26 02:04:58.905: ERROR/AndroidRuntime(15748):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 

08-26 02:04:58.905: ERROR/AndroidRuntime(15748):  at dalvik.system.NativeStart.main(Native Method) 

08-26 02:05:06.842: ERROR/NetStatUtils(15757): The report APN is not in local map, un-match case, fatal error!!

來源

2011-08-26 Teddy

你可以記錄整個堆棧跟蹤（並在這裏發佈）？ – Thilo

你確定你的模擬器中有google api嗎？在我的應用程序中，uses-library就在應用程序結束標記 – Samuel

我發現的問題是，在我的Droid X上運行的紮根ROM SBF'ing我的電話後程序應用程序工作。

來源

2011-08-27 16:31:58 Teddy

嘗試Intent locationSetter = new Intent(Home.this, LocationSetter.class);，而不是

來源

2011-08-26 01:39:18

之前「我不認爲使用Class.forName（）是必要的，直到LocationSetter.class開始拋出異常」 – Teddy

Android ClassNotFoundException帶Google Maps API

回答

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