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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.gallery3d.photoeditor;
import android.content.Context;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.AsyncTask;
import android.view.Gravity;
import android.widget.Toast;
import com.android.gallery3d.R;
/**
* Asynchronous task for loading source photo screennail.
*/
public class LoadScreennailTask extends AsyncTask<Uri, Void, Bitmap> {
/**
* Callback for the completed asynchronous task.
*/
public interface Callback {
void onComplete(Bitmap result);
}
private static final int SCREENNAIL_WIDTH = 1280;
private static final int SCREENNAIL_HEIGHT = 960;
private final Context context;
private final Callback callback;
public LoadScreennailTask(Context context, Callback callback) {
this.context = context;
this.callback = callback;
}
/**
* The task should be executed with one given source photo uri.
*/
@Override
protected Bitmap doInBackground(Uri... params) {
if (params[0] == null) {
return null;
}
return new BitmapUtils(context).getBitmap(params[0], SCREENNAIL_WIDTH, SCREENNAIL_HEIGHT);
}
@Override
protected void onPostExecute(Bitmap result) {
if (result == null) {
Toast toast = Toast.makeText(context, R.string.loading_failure, Toast.LENGTH_SHORT);
toast.setGravity(Gravity.CENTER, 0, 0);
toast.show();
}
callback.onComplete(result);
}
}
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