eclipse android 错误列表
1.eclipse 编译android工程，发生如下错误：
Conversion to Dalvik format failed:Unable to execute dex:null

处理方法：
1.采用用户库导入JAR包的形式。导入JAR包。操作步骤如下：
1. Right-click the project in Eclipse and select "Build Path -> Add Libraries...".
2. Select User Library from the list and click Next.
3. Click the "User Libraries..." button.
4. Click "New..." in the User Libraries dialog.
5. Give the user library a name and select the System library checkbox and click OK.
6. Highlight the newly added user library in the list and click the "Add JARs..." button and add the desired jar files.
7. Click OK on the User Libraries dialog.
8. Make sure the new user library is checked in the Add Library dialog and