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java.lang.RuntimeException：無法啓動活動ComponentInfo {...}：java.lang.ClassCastException：android.app.Application無法投射到

2013-02-08 60 views
0

我正在創建一個使用Microsoft夏威夷OCR的Android應用程序;我的應用程序的測試過程中，它崩潰給我這個錯誤：java.lang.RuntimeException：無法啓動活動ComponentInfo {...}：java.lang.ClassCastException：android.app.Application無法投射到

02-08 11:38:38.861: E/AndroidRuntime(4704): FATAL EXCEPTION: main 
02-08 11:38:38.861: E/AndroidRuntime(4704): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.mobile/com.example.mobile.RecognitionActivity}: java.lang.ClassCastException: android.app.Application cannot be cast to microsoft.hawaii.sampleappbase.HawaiiBaseApplication 
02-08 11:38:38.861: E/AndroidRuntime(4704):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1960) 
02-08 11:38:38.861: E/AndroidRuntime(4704):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1985) 
02-08 11:38:38.861: E/AndroidRuntime(4704):  at android.app.ActivityThread.access$600(ActivityThread.java:127) 
02-08 11:38:38.861: E/AndroidRuntime(4704):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1151) 
02-08 11:38:38.861: E/AndroidRuntime(4704):  at android.os.Handler.dispatchMessage(Handler.java:99) 
02-08 11:38:38.861: E/AndroidRuntime(4704):  at android.os.Looper.loop(Looper.java:137) 
02-08 11:38:38.861: E/AndroidRuntime(4704):  at android.app.ActivityThread.main(ActivityThread.java:4476) 
02-08 11:38:38.861: E/AndroidRuntime(4704):  at java.lang.reflect.Method.invokeNative(Native Method) 
02-08 11:38:38.861: E/AndroidRuntime(4704):  at java.lang.reflect.Method.invoke(Method.java:511) 
02-08 11:38:38.861: E/AndroidRuntime(4704):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:816) 
02-08 11:38:38.861: E/AndroidRuntime(4704):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:583) 
02-08 11:38:38.861: E/AndroidRuntime(4704):  at dalvik.system.NativeStart.main(Native Method) 
02-08 11:38:38.861: E/AndroidRuntime(4704): Caused by: java.lang.ClassCastException: android.app.Application cannot be cast to microsoft.hawaii.sampleappbase.HawaiiBaseApplication 
02-08 11:38:38.861: E/AndroidRuntime(4704):  at microsoft.hawaii.sampleappbase.HawaiiBaseAuthActivity.getBaseApplication(HawaiiBaseAuthActivity.java:204) 
02-08 11:38:38.861: E/AndroidRuntime(4704):  at microsoft.hawaii.sampleappbase.HawaiiBaseAuthActivity.getAuthenticationTypeFromApp(HawaiiBaseAuthActivity.java:117) 
02-08 11:38:38.861: E/AndroidRuntime(4704):  at microsoft.hawaii.sampleappbase.HawaiiBaseAuthActivity.onCreate(HawaiiBaseAuthActivity.java:52) 
02-08 11:38:38.861: E/AndroidRuntime(4704):  at com.example.mobile.RecognitionActivity.onCreate(RecognitionActivity.java:32) 
02-08 11:38:38.861: E/AndroidRuntime(4704):  at android.app.Activity.performCreate(Activity.java:4636) 
02-08 11:38:38.861: E/AndroidRuntime(4704):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1051) 
02-08 11:38:38.861: E/AndroidRuntime(4704):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1924) 
02-08 11:38:38.861: E/AndroidRuntime(4704):  ... 11 more

的錯誤指的是進口的項目，特別是這樣的代碼：

package microsoft.hawaii.sampleappbase; 

import microsoft.hawaii.hawaiiClientLibraryBase.Identities.ClientIdentity; 
import microsoft.hawaii.hawaiiClientLibraryBase.Util.Utility; 
import microsoft.hawaii.sampleappbase.HawaiiBaseApplication.AuthenticationType; 
import android.app.Activity; 
import android.app.AlertDialog; 
import android.app.Dialog; 
import android.content.Context; 
import android.content.DialogInterface; 
import android.content.DialogInterface.OnCancelListener; 
import android.net.ConnectivityManager; 
import android.net.NetworkInfo; 
import android.os.Bundle; 
import android.widget.Toast; 

/** 
* Base Activity for Hawaii authentication 
*/ 
public class HawaiiBaseAuthActivity extends Activity { 

/** 
* Error code for missing authentication type in configuration file 
*/ 
static final int MISSING_NETWORK_CONNECTION = 0; 

/** 
* Error code for missing authentication value in configuration file 
*/ 
static final int MISSING_AUTHENTICATION_TYPE = 1; 

/** 
* Error code for missing authentication value in configuration file 
*/ 
static final int MISSING_AUTHENTICATION_VALUES = 2; 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 

    ConnectivityManager connMgr = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE); 
    NetworkInfo networkInfo = connMgr.getActiveNetworkInfo(); 
    if (networkInfo == null || !networkInfo.isConnected()) { 
     this.showDialog(MISSING_NETWORK_CONNECTION); 
     return; 
    } 

    if (!this.shouldAuthenticate()) { 
     return; 
    } 

    AuthenticationType authType = this.getAuthenticationTypeFromApp(); 
    if (authType == AuthenticationType.NOVALUE) { 
     this.showDialog(MISSING_AUTHENTICATION_TYPE); 
     return; 
    } 

    // create ClientIdentity object based on configured Hawaii client 
    // credential 
    ClientIdentity identity = null; 
    try { 
     switch (authType) { 
     case GUID: 
      String appId = this.getString(R.string.hawaii_GUID_app_ID); 
      if (Utility.isStringNullOrEmpty(appId)) { 
       this.showDialog(MISSING_AUTHENTICATION_VALUES); 
       return; 
      } 

      identity = ClientIdentity.createClientIdentity(appId); 
      break; 
     case ADM: 
      String clientId = this.getString(R.string.hawaii_ADM_client_ID); 
      String clientSecret = this 
        .getString(R.string.hawaii_ADM_client_secret); 
      String serviceScope = this 
        .getString(R.string.hawaii_ADM_service_scope); 

      if (Utility.isStringNullOrEmpty(clientId) 
        || Utility.isStringNullOrEmpty(clientSecret) 
        || Utility.isStringNullOrEmpty(serviceScope)) { 
       this.showDialog(MISSING_AUTHENTICATION_VALUES); 
       return; 
      } 
      identity = ClientIdentity.createClientIdentity(clientId, 
        clientSecret, serviceScope); 
      break; 
     case NOVALUE: 
      this.showErrorMessage(
        "Couldn't configure client identity for calling Hawaii service", 
        null); 
      return; 
     } 
    } catch (Exception exception) { 
     this.showErrorMessage(
       "Couldn't configure client identity for calling Hawaii service", 
       exception); 
    } 

    if (identity != null) { 
     this.getBaseApplication().setClientIdentity(identity); 
    } else { 
     this.showErrorMessage(
       "Couldn't configure client identity for calling Hawaii service", 
       null); 
    } 
} 

/** 
* 
* getAuthenticationTypeFromApp Return authentication type which assigned by 
* application 
* 
* @return AuthenticationType 
*/ 
protected AuthenticationType getAuthenticationTypeFromApp() { 
    return this.getBaseApplication().getAuthType(); 
} 

/** 
* Return a flag to indicate whether current Activity needs authentication 
* 
* @return boolean 
*/ 
protected boolean shouldAuthenticate() { 
    return true; 
} 

/** 
* show ErrorMessage using AlertDialog 
* 
* @param title 
*   title to display on the dialog 
* @param exception 
*   exception to display on the dialog 
*/ 
protected void showErrorMessage(String title, Throwable exception) { 
    if (exception != null) { 
     exception.printStackTrace(); 
     System.out.println(exception.toString()); 
    } 

    AlertDialog dialog = dialogToShow(title, exception).create(); 
    dialog.setCanceledOnTouchOutside(true); 
    dialog.show(); 
} 

/** 
* show ErrorMessage using AlertDialog 
* 
* @param title 
*   title to display on the dialog 
* @param exception 
*   exception to display on the dialog 
*/ 
protected void showErrorMessage(AlertDialog.Builder builder) { 
    if (builder == null) { 
     return; 
    } 

    AlertDialog dialog = builder.create(); 
    dialog.setCanceledOnTouchOutside(true); 
    dialog.show(); 
} 

/** 
* show specified message in toast 
* 
* @param message 
*   specified message 
*/ 
protected void showMessage(String message) { 
    if (!Utility.isStringNullOrEmpty(message)) { 
     Toast.makeText(this, message, Toast.LENGTH_SHORT).show(); 
    } 
} 

/** 
* create a {@link AlertDialog.Builder} to show dialog 
* 
* @param title 
*   title to display on the dialog 
* @param exception 
*   exception to display on the dialog 
* @return AlertDialog.Builder 
*/ 
protected AlertDialog.Builder dialogToShow(String title, Throwable exception) { 
    AlertDialog.Builder builder = new AlertDialog.Builder(this); 
    builder.setTitle(title); 
    if (exception != null) { 
     builder.setMessage(exception.getLocalizedMessage()); 
    } 

    builder.setCancelable(true); 
    return builder; 
} 

/** 
* gets current {@link HawaiiBaseApplication} object 
* 
* @return HawaiiBaseApplication 
*/ 
protected HawaiiBaseApplication getBaseApplication() { 
    return (HawaiiBaseApplication) this.getApplication(); 
} 

@Override 
protected Dialog onCreateDialog(int id) { 
    AlertDialog dialog = new AlertDialog.Builder(this).create(); 
    dialog.setTitle(getString(R.string.configuration_error_title)); 
    dialog.setCanceledOnTouchOutside(true); 
    dialog.setCancelable(true); 

    String errorMessage = this.getErrorMessage(id); 
    dialog.setMessage(errorMessage); 

    final Activity activity = this; 
    dialog.setOnCancelListener(new OnCancelListener() { 
     public void onCancel(DialogInterface dialog) { 
      activity.finish(); 
     } 
    }); 

    return dialog; 
} 

protected String getErrorMessage(int id) { 
    switch (id) { 
    case MISSING_NETWORK_CONNECTION: 
     return getString(R.string.error_missing_network_connection); 
    case MISSING_AUTHENTICATION_TYPE: 
     return getString(R.string.error_missing_authentication_type); 
    case MISSING_AUTHENTICATION_VALUES: 
     return getString(R.string.error_missing_authentication_value); 
    default: 
     return null; 
    } 
} 
}

這是HawaiiBaseApplication

的代碼 
/** 
* Copyright (c) Microsoft Corporation. All rights reserved. 
*/ 
package microsoft.hawaii.sampleappbase; 

import microsoft.hawaii.hawaiiClientLibraryBase.Identities.ClientIdentity; 
import android.app.Application; 

/** 
* Base application class for Hawaii sample applications 
*/ 
public class HawaiiBaseApplication extends Application { 

/** 
* Hawaii authentication type 
*/ 
private AuthenticationType authType; 

/** 
* ClientIdentity object 
*/ 
private ClientIdentity identity; 

/** 
* Enum class to represent Hawaii authentication type 
*/ 
public enum AuthenticationType { 
    GUID, ADM, NOVALUE; 

    /** 
    * Convert to authentication type enum for specified String 
    * 
    * @param str 
    *   specified String 
    * @return AuthenticationType 
    */ 
    public static AuthenticationType convertToAuthType(String str) { 
     try { 
      return valueOf(str.toUpperCase()); 
     } catch (Exception ex) { 
      return NOVALUE; 
     } 
    } 
} 

/** 
* Gets current authentication type 
* 
* @return AuthenticationType 
*/ 
public AuthenticationType getAuthType() { 
    if (authType == null) { 
     authType = AuthenticationType 
       .convertToAuthType(getString(R.string.hawaii_authentication_type)); 
    } 

    return authType; 
} 

/** 
* Gets current ClientIdentity object 
* 
* @return ClientIdentity 
*/ 
public ClientIdentity getClientIdentity() { 
    return this.identity; 
} 

/** 
* Sets current ClientIdentity object 
* 
* @param identity 
*   current ClientIdentity object 
*/ 
public void setClientIdentity(ClientIdentity identity) { 
    this.identity = identity; 
} 

}

請問有人可以幫我嗎？我卡在這一點，我不知道它有什麼問題..

非常感謝你！

來源

2013-02-08 Sergio Picheo

+0

郵編.. – user370305

回答

0

您的application元素在您的AndroidManifest.xml中有android:name="microsoft.hawaii.sampleappbase.HawaiiBaseApplication"屬性嗎？這可能是缺少的。 `HawaiiBaseApplication`類

http://developer.android.com/guide/topics/manifest/application-element.html

來源

2013-02-08 11:18:22

+0

沒有..也許你是對的..但我必須將它添加到我的應用程序清單或導入的項目清單？ –

+0

它爲我工作..非常感謝！ –

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