1 files changed, 68 insertions, 0 deletions
diff --git a/src/com/android/gallery3d/filtershow/tools/BitmapTask.java b/src/com/android/gallery3d/filtershow/tools/BitmapTask.java
new file mode 100644
index 000000000..62801c1f2
--- /dev/null
+++ b/src/com/android/gallery3d/filtershow/tools/BitmapTask.java
@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.gallery3d.filtershow.tools;
+
+import android.graphics.Bitmap;
+import android.os.AsyncTask;
+
+/**
+ * Asynchronous task filtering or doign I/O with bitmaps.
+ */
+public class BitmapTask <T> extends AsyncTask<T, Void, Bitmap> {
+
+    private Callbacks<T> mCallbacks;
+    private static final String LOGTAG = "BitmapTask";
+
+    public BitmapTask(Callbacks<T> callbacks) {
+        mCallbacks = callbacks;
+    }
+
+    @Override
+    protected Bitmap doInBackground(T... params) {
+        if (params == null || mCallbacks == null) {
+            return null;
+        }
+        return mCallbacks.onExecute(params[0]);
+    }
+
+    @Override
+    protected void onPostExecute(Bitmap result) {
+        if (mCallbacks == null) {
+            return;
+        }
+        mCallbacks.onComplete(result);
+    }
+
+    @Override
+    protected void onCancelled() {
+        if (mCallbacks == null) {
+            return;
+        }
+        mCallbacks.onCancel();
+    }
+
+    /**
+     * Callbacks for the asynchronous task.
+     */
+    public interface Callbacks<P> {
+        void onComplete(Bitmap result);
+
+        void onCancel();
+
+        Bitmap onExecute(P param);
+    }
+}