1 files changed, 101 insertions, 0 deletions
diff --git a/src/com/android/camera/ThumbnailAdapter.java b/src/com/android/camera/ThumbnailAdapter.java
new file mode 100644
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--- /dev/null
+++ b/src/com/android/camera/ThumbnailAdapter.java
@@ -0,0 +1,101 @@
+/*
+ * Copyright (C) 2010 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.camera;
+
+import android.content.Context;
+import android.database.Cursor;
+import android.graphics.Bitmap;
+import android.net.Uri;
+import android.provider.MediaStore;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ResourceCursorAdapter;
+import android.util.Log;
+
+import java.lang.Math;
+import java.util.LinkedHashMap;
+import java.util.Map;
+
+public class ThumbnailAdapter extends ResourceCursorAdapter {
+    private final String TAG = "ThumbnailAdapter";
+    private int idIndex;
+    private boolean mIsImage;
+    private LinkedHashMap<String, Bitmap> mMap;
+
+    public ThumbnailAdapter(Context context, int layout, Cursor c,
+            boolean isImage) {
+        super(context, layout, c, false);
+        mIsImage = isImage;
+        if (mIsImage) {
+            idIndex = c.getColumnIndexOrThrow(MediaStore.Images.Thumbnails._ID);
+        } else {
+            idIndex = c.getColumnIndexOrThrow(MediaStore.Video.Thumbnails._ID);
+        }
+        final int capacity = Math.max(c.getCount() * 2, 16);
+        mMap = new LinkedHashMap<String, Bitmap>(16, 0.75f, true) {
+            @Override
+            protected boolean removeEldestEntry(Map.Entry<String, Bitmap> eldest) {
+                return size() > capacity;
+            }
+        };
+
+    }
+
+    @Override
+    public void bindView(View view, Context context, Cursor cursor) {
+        int id = cursor.getInt(idIndex);
+        Bitmap b;
+        Uri uri;
+        RotateImageView v = (RotateImageView) view;
+
+        if (mIsImage) {
+            uri = Uri.withAppendedPath(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
+                    Integer.toString(id));
+        } else {
+            uri = Uri.withAppendedPath(MediaStore.Video.Media.EXTERNAL_CONTENT_URI,
+                    Integer.toString(id));
+        }
+        long start = System.currentTimeMillis();
+        // Sometimes MetadataRetriever fails to generate video thumbnail. To
+        // avoid wasting time to get thumbnail again, null is still put into
+        // hash map.
+        if (!mMap.containsKey(uri.toString())) {
+            if (mIsImage) {
+                b = MediaStore.Images.Thumbnails.getThumbnail(
+                        context.getContentResolver(), id,
+                        MediaStore.Images.Thumbnails.MICRO_KIND, null);
+            } else {
+                b = MediaStore.Video.Thumbnails.getThumbnail(
+                        context.getContentResolver(), id,
+                        MediaStore.Video.Thumbnails.MICRO_KIND, null);
+            }
+            mMap.put(uri.toString(), b);
+        } else {
+            b = mMap.get(uri.toString());
+        }
+        long end = System.currentTimeMillis();
+        Log.v(TAG, "Getting thumbnail takes " + (end - start) + "ms");
+        v.setData(uri, b);
+    }
+
+    @Override
+    public View newView(Context context, Cursor cursor, ViewGroup parent) {
+        View view = super.newView(context, cursor, parent);
+        ((RotateImageView)view).enableAnimation(false);
+        return view;
+    }
+}