问android应用程序错误5

EN

我试图实现一个基于rscm (中间件)的应用程序。当我试图在模拟器上运行时，我会得到下面列出的错误：

错误:03-27 16:58:20.490: E/ trace (1508)：打开跟踪文件时出错:没有这样的文件或目录(2) 03-27 21:53:21.610: D/AndroidRuntime(3803)：关闭VM03-27 21:53:21.610: W/dalvikvm(3803)：threadid=1:线程退出带有未知异常的线程(group=0x40a71930) 03-27 21:53:21.760: E/AndroidRuntime(3803)：致命异常:主03-27 21:53:21.760: E/AndroidRuntime(3803)：java.lang.RuntimeException:无法实例化活动/data/app/com.example.context_application-2.apk 03-27 21:53:21.760: E/AndroidRuntime(3803)：at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2106) 03-27 21:21.760: E/AndroidRuntime(3803)：at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230) 03-27 21:53:21.760: E/AndroidRuntime(3803)：在android.app.ActivityThread.access$600(ActivityThread.java:141) 03-27 21:53:21.760: E/AndroidRuntime(3803)：在android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234) 03-27 21:21.760: E/AndroidRuntime(3803)：android.os.Handler.dispatchMessage(Handler.java:99) 03-27 21:53: 53:53:53:53:53:53：21.760: E/AndroidRuntime(3803)：android.os.Looper.loop(Looper.java:137) 03-27 21:53:21.760: E/AndroidRuntime(3803)：at Looper.java:137 03-27 21:53:21.760: E/AndroidRuntime(3803)：at java.lang.reflect.Method.invokeNative(原生方法) 03-27 :53:21.760: E/AndroidRuntime(3803)：在java.lang.reflect.Method.invoke(Method.java:511) 03-27 21:53:21.760: E/AndroidRuntime(3803)：在com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 03-27 21:53:21.760: E/AndroidRuntime(3803)：com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 03-27 21:53:21.760: E/AndroidRuntime(3803)：at dalvik.system.NativeStart.main(原生方法) 03-27 21:53:21.760: E/AndroidRuntime(3803)：由:java.lang.ClassNotFoundException引起:在path上没有找到类dalvik.system.NativeStart.main: dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:65) 03-27 21:53:21.760: E/AndroidRuntime(3803)：at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:65) 03-27 : 21:53:21.760: E/AndroidRuntime(3803)：在java.lang.ClassLoader.loadClass(ClassLoader.java:501) 03-27 21:53:21.760: E/AndroidRuntime(3803)：at java.lang.ClassLoader.loadClass(ClassLoader.java:461) 03-27 21:53:21.760: E/AndroidRuntime(3803)：android.app.Instrumentation.newActivity(Instrumentation.java:1054) 03-27 21:53:21.760: eandroid.app.ActivityThread.performLaunchActivity(ActivityThread.java:2097) 03-27 21:53:21.760: E/AndroidRuntime(3803)：. 11

有人能帮忙吗？

package com.example.context;

import android.os.Bundle;
import android.widget.TextView;
import android.widget.Toast;
import org.aspectsense.rscm.ContextValue;
import org.aspectsense.rscm.context.client.ContextListenerActivity;
import org.json.JSONException;

import java.util.Date;

public class MyContextAwareActivity extends ContextListenerActivity
{
    @Override public String[] getRequestedScopes()
    {
        return new String[] { "battery.level" };
    }

    private TextView messageTextView;

    @Override protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        messageTextView = new TextView(this);
        setContentView(messageTextView);
        appendMessage("Activity created");
    }

    private void appendMessage(final String message)
    {
        final String currentMessage = messageTextView.getText().toString();
        messageTextView.setText(currentMessage + "\n" + message);
    }

    @Override public void onContextValueChanged(ContextValue contextValue)
    {
       try
        {
            appendMessage(new Date() + ": The battery level is " +         contextValue.getValueAsInteger() + "%");
        }
        catch (JSONException jsone)
        {
            Toast.makeText(this, "Error while displaying context event: " + contextValue, Toast.LENGTH_SHORT).show();
        }
    }
}










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

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />
<uses-permission android:name="android.permission.READ_CONTACTS" />
  <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>  
    <application
        android:allowBackup="true"
       android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.context.MyContextAwareActivity"
            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>