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/*
* 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;
}
}
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