我在运行Android单元测试用例时面临一个奇怪的问题：
[2015-01-29 17:47:24 - RFStackTest] R.java was modified manually! Reverting to generated version!
[2015-01-29 17:47:36 - Unable to launch cygpath. Is Cygwin on the path?] java.io.IOException: Cannot run program "cygpath": CreateProcess error=2, The system cannot find the file specified
[2015-01-29 17:47:47 - RFStackTest] ------------------------------
[2015-01-29 17:47:47 - RFStackTest] Android Launch!
[2015-01-29 17:47:47 - RFStackTest] adb is running normally.
[2015-01-29 17:47:47 - RFStackTest] Performing android.test.InstrumentationTestRunner JUnit launch
[2015-01-29 17:47:47 - RFStackTest] Automatic Target Mode: using device '192.168.33.125:5000'
[2015-01-29 17:47:47 - RFStackTest] Uploading RFStackTest.apk onto device '192.168.33.125:5000'
[2015-01-29 17:47:51 - RFStackTest] Installing RFStackTest.apk...
[2015-01-29 17:47:52 - RFStackTest] Success!
[2015-01-29 17:47:52 - RFStackTest] Launching instrumentation android.test.InstrumentationTestRunner on 192.168.33.125:5000
[2015-01-29 17:47:52 - RFStackTest] Failed to launch test
[2015-01-29 17:48:09 - RFStackTest] Dx
trouble writing output: already prepared
[2015-01-29 17:48:09 - RFStackTest] ------------------------------
[2015-01-29 17:48:09 - RFStackTest] Android Launch!
[2015-01-29 17:48:09 - RFStackTest] adb is running normally.
[2015-01-29 17:48:09 - RFStackTest] Performing android.test.InstrumentationTestRunner JUnit launch
[2015-01-29 17:48:10 - RFStackTest] Automatic Target Mode: using device '192.168.33.125:5000'
[2015-01-29 17:48:10 - RFStackTest] Uploading RFStackTest.apk onto device '192.168.33.125:5000'
[2015-01-29 17:48:14 - RFStackTest] Installing RFStackTest.apk...
[2015-01-29 17:48:16 - RFStackTest] Success!
[2015-01-29 17:48:16 - RFStackTest] Launching instrumentation android.test.InstrumentationTestRunner on 192.168.33.125:5000
[2015-01-29 17:48:16 - RFStackTest] Failed to launch test
我该如何解决这个问题？
答案 0 :(得分：1)
尝试删除R.java并让eclipse重新生成它，通过重建项目然后项目 - ＆gt;干净会解决它。
由R.java was modified manually! Reverting to generated version提供