去掉native设置

Removing the C nature:

The only way I could find to reliably removed the C nature from the project was by hand editing Eclipse's .project file for the project.

1. Close the Eclipse project (e.g. by quitting Eclipse).

2. Open the .project file in a text or xml editor. There will be at least 2 <buildCommand> nodes that need to be removed. Remove the <buildCommand> node with name org.eclipse.cdt.managedbuilder.core.genmakebuilder and all its children, and the <buildCommand> node with name org.eclipse.cdt.managedbuilder.core.ScannerConfigBuilder and its children. Finally, remove the lines:

   <nature>org.eclipse.cdt.core.cnature</nature> <nature>org.eclipse.cdt.core.ccnature</nature> <nature>org.eclipse.cdt.managedbuilder.core.managedBuildNature</nature> <nature>org.eclipse.cdt.managedbuilder.core.ScannerConfigNature</nature>

3. Completely remove the .cproject file.

Adding back the Android Native nature

Reopen the project in Eclipse. Then right-click on the project in the Project Explorer, and from the "Android Tools" contextual menu, choose "Add Native Support...".