Add code cache directory for apps.

This provides a directory where apps can cache compiled or optimized
code generated at runtime.  The platform will delete all files in
this location on both app and platform upgrade.

Bug: 16187224
Change-Id: I641b21d841c436247f35ff235317e3a4ba520441

2 files changed, 21 insertions, 0 deletions

diff --git a/core/java/android/content/Context.java b/core/java/android/content/Context.java
index a52cbdd..d068b1f 100644
--- a/core/java/android/content/Context.java
+++ b/core/java/android/content/Context.java
@@ -867,6 +867,22 @@ public abstract class Context {
     public abstract File getCacheDir();
 
     /**
+     * Returns the absolute path to the application specific cache directory on
+     * the filesystem designed for storing cached code. The system will delete
+     * any files stored in this location both when your specific application is
+     * upgraded, and when the entire platform is upgraded.
+     * <p>
+     * This location is optimal for storing compiled or optimized code generated
+     * by your application at runtime.
+     * <p>
+     * Apps require no extra permissions to read or write to the returned path,
+     * since this path lives in their private storage.
+     *
+     * @return The path of the directory holding application code cache files.
+     */
+    public abstract File getCodeCacheDir();
+
+    /**
      * Returns the absolute path to the directory on the primary external filesystem
      * (that is somewhere on {@link android.os.Environment#getExternalStorageDirectory()
      * Environment.getExternalStorageDirectory()} where the application can
diff --git a/core/java/android/content/ContextWrapper.java b/core/java/android/content/ContextWrapper.java
index 13eed07..4e1c4a7 100644
--- a/core/java/android/content/ContextWrapper.java
+++ b/core/java/android/content/ContextWrapper.java
@@ -232,6 +232,11 @@ public class ContextWrapper extends Context {
     }
 
     @Override
+    public File getCodeCacheDir() {
+        return mBase.getCodeCacheDir();
+    }
+
+    @Override
     public File getExternalCacheDir() {
         return mBase.getExternalCacheDir();
     }