1

我尝试实现一个基于 rscm（中间件）的应用程序。当我尝试在模拟器上运行时，我收到下面列出的错误：

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 VM 03-27 21:53:21.610: W/dalvikvm(3803): threadid=1: 线程退出未捕获异常 (group=0x40a71930) 03 -27 21:53:21.760: E/AndroidRuntime(3803): 致命异常: main 03-27 21:53:21.760: E/AndroidRuntime(3803): java.lang.RuntimeException: 无法实例化活动 ComponentInfo{com.example .context_application/com.example.context_application.MyContextAwareActivity}：java.lang.ClassNotFoundException：在路径上找不到类“com.example.context_application.MyContextAwareActivity”：/data/app/com.example.context_application-2.apk 03 -27 21:53:21.760: E/AndroidRuntime(3803): 在 android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2106) 03-27 21:53:21.760: E/AndroidRuntime(3803): 在 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 21:53:21.760: E/AndroidRuntime(3803): 在 android.os.Handler.dispatchMessage(Handler. java:99) 03-27 21:53:21.760: E/AndroidRuntime(3803): 在 android.os.Looper.loop(Looper.java:137) 03-27 21:53:21.760: E/AndroidRuntime(3803) : 在 android.app.ActivityThread.main(ActivityThread.java:5041) 03-27 21:53:21.760: E/AndroidRuntime(3803): 在 java.lang.reflect.Method.invokeNative(Native Method) 03-27 21 :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): 在 com.android.internal.os.ZygoteInit.main( ZygoteInit.java:560) 03-27 21:53:21.760: E/AndroidRuntime(3803): at dalvik.system.NativeStart.main(Native Method) 03-27 21:53:21.760: E/AndroidRuntime(3803):引起：java.lang.ClassNotFoundException：在路径上找不到类“com.example.context_application.MyContextAwareActivity”：/data/app/com.example.context_application-2.apk 03-27 21:53:21.760: E /AndroidRuntime(3803): 在 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): 在 java.lang.ClassLoader。loadClass(ClassLoader.java:461) 03-27 21:53:21.760: E/AndroidRuntime(3803): 在 android.app.Instrumentation.newActivity(Instrumentation.java:1054) 03-27 21:53:21.760: E/ AndroidRuntime(3803): 在 android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2097) 03-27 21:53:21.760: E/AndroidRuntime(3803): ... 11 更多

任何人都可以帮忙吗？

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>
4

1 回答 1

0

您告诉它写入外部存储。你在eclipse中设置了SD卡吗？

这些答案有帮助吗？打开跟踪文件时出错：没有这样的文件或目录 (2)

于 2013-03-27T18:35:55.930 回答