[Solved]-Android test project cannot find app classes-eclipse

check the manifest of the test app, it should contain the following:

1. package definition for the test code

2. uses-sdk that is appropriate for your app

3. uses-library that links in the test runner

4. instrumentation with link to the app code

   <manifest xmlns:android="http://schemas.android.com/apk/res/android"
   package="com.example.test"      <!-- package of the test code -->
   android:versioncode="1"
   android:versionname="1.0" >
   
   <uses-sdk
       android:minsdkversion="8"
       android:targetsdkversion="17" />
   
   <instrumentation
       android:name="android.test.instrumentationtestrunner"
       android:targetpackage="com.example.app" />      <!-- package of the app code -->
   
   <application android:allowbackup="false">
       <!-- linkage for the test runner -->
       <uses-library android:name="android.test.runner" />     
   </application>