プロジェクト作成時などに、 gen フォルダはデフォルトで警告無視となるようにします。 Eclipse JUNO 以降でのみ効果あり。

set_IgnoreCompilerWarnings_to_gen.diff

diff --git a/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/wizards/newproject/NewProjectCreator.java b/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/wizards/newproject/NewProjectCreator.java
index 19a7101..d7409da 100644
--- a/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/wizards/newproject/NewProjectCreator.java
+++ b/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/wizards/newproject/NewProjectCreator.java
@@ -210,6 +210,8 @@ public class NewProjectCreator  {
     private static final String LAYOUT_TEMPLATE = "layout.template";            //$NON-NLS-1$
     private static final String MAIN_LAYOUT_XML = "main.xml";                   //$NON-NLS-1$
 
+    private static final String KEY_IGNORE_WARNINGS = "ignore_optional_problems"; //$NON-NLS-1$
+
     private final NewProjectWizardState mValues;
     private final IRunnableContext mRunnableContext;
 
@@ -719,7 +721,8 @@ public class NewProjectCreator  {
 
         // Setup class path: mark folders as source folders
         IJavaProject javaProject = JavaCore.create(project);
-        setupSourceFolders(javaProject, sourceFolders, monitor);
+        setupSourceFolder(javaProject, sourceFolders[0], monitor);
+        setupGenSourceFolder(javaProject, sourceFolders[1], monitor);
 
         if (((Boolean) parameters.get(PARAM_IS_NEW_PROJECT)).booleanValue()) {
             // Create files in the project if they don't already exist
@@ -1326,12 +1329,39 @@ public class NewProjectCreator  {
      * Adds the given folder to the project's class path.
      *
      * @param javaProject The Java Project to update.
-     * @param sourceFolders Template Parameters.
+     * @param sourceFolder Source folder path to add.
      * @param monitor An existing monitor.
      * @throws JavaModelException if the classpath could not be set.
      */
-    private void setupSourceFolders(IJavaProject javaProject, String[] sourceFolders,
+    private void setupSourceFolder(IJavaProject javaProject, String sourceFolder,
             IProgressMonitor monitor) throws JavaModelException {
+        setupSourceFolder(javaProject, sourceFolder, false, monitor);
+    }
+
+    /**
+     * Adds the given folder to the project's class path as a generated source folder.
+     *
+     * @param javaProject The Java Project to update.
+     * @param sourceFolder Source folder path to add.
+     * @param monitor An existing monitor.
+     * @throws JavaModelException if the classpath could not be set.
+     */
+    private void setupGenSourceFolder(IJavaProject javaProject, String sourceFolder,
+            IProgressMonitor monitor) throws JavaModelException {
+        setupSourceFolder(javaProject, sourceFolder, true, monitor);
+    }
+
+    /**
+     * Adds the given folder to the project's class path.
+     *
+     * @param javaProject The Java Project to update.
+     * @param sourceFolder Source folder path to add.
+     * @param forGenerated whether {@code sourceFolder} is for generated code.
+     * @param monitor An existing monitor.
+     * @throws JavaModelException if the classpath could not be set.
+     */
+    private void setupSourceFolder(IJavaProject javaProject, String sourceFolder,
+            boolean forGenerated, IProgressMonitor monitor) throws JavaModelException {
         IProject project = javaProject.getProject();
 
         // get the list of entries.
@@ -1340,15 +1370,23 @@ public class NewProjectCreator  {
         // remove the project as a source folder (This is the default)
         entries = removeSourceClasspath(entries, project);
 
-        // add the source folders.
-        for (String sourceFolder : sourceFolders) {
-            IFolder srcFolder = project.getFolder(sourceFolder);
+        IFolder srcFolder = project.getFolder(sourceFolder);
 
-            // remove it first in case.
-            entries = removeSourceClasspath(entries, srcFolder);
-            entries = ProjectHelper.addEntryToClasspath(entries,
-                    JavaCore.newSourceEntry(srcFolder.getFullPath()));
+        // remove it first in case.
+        entries = removeSourceClasspath(entries, srcFolder);
+
+        // add the source folder.
+        IClasspathEntry srcEntry;
+        if (forGenerated) {
+            // suppress compiler warnings in the folder
+            srcEntry = JavaCore.newSourceEntry(srcFolder.getFullPath(), new IPath[] {},
+                    new IPath[] {}, null, new IClasspathAttribute[] {
+                        JavaCore.newClasspathAttribute(KEY_IGNORE_WARNINGS, "true")
+                    });
+        } else {
+            srcEntry = JavaCore.newSourceEntry(srcFolder.getFullPath());
         }
+        entries = ProjectHelper.addEntryToClasspath(entries, srcEntry);
 
         javaProject.setRawClasspath(entries, new SubProgressMonitor(monitor, 10));
     }