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/*
* Copyright (C) 2013 The CyanogenMod 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 org.cyanogenmod.wallpapers.photophase.tasks;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.os.AsyncTask;
import android.widget.ImageView;
import org.cyanogenmod.wallpapers.photophase.utils.BitmapUtils;
import java.io.File;
/**
* A class for load images associated to a ImageView in background.
*/
public class AsyncPictureLoaderTask extends AsyncTask<File, Void, Drawable> {
/**
* Notify whether the picture was loaded
*/
public static abstract class OnPictureLoaded {
Object[] mRefs;
/**
* Constructor of <code>OnPictureLoaded</code>
*
* @param refs References to notify
*/
public OnPictureLoaded(Object...refs) {
super();
mRefs = refs;
}
/**
* Invoked when a picture is loaded
*
* @param o The original object reference
* @param drawable The drawable
*/
public abstract void onPictureLoaded(Object o, Drawable drawable);
}
private final Context mContext;
private final ImageView mView;
private final OnPictureLoaded mCallback;
/**
* Constructor of <code>AsyncPictureLoaderTask</code>
*
* @param context The current context
* @param v The associated view
*/
public AsyncPictureLoaderTask(Context context, ImageView v) {
this(context, v, null);
}
/**
* Constructor of <code>AsyncPictureLoaderTask</code>
*
* @param context The current context
* @param v The associated view
* @param callback A callback to notify when the picture was loaded
*/
public AsyncPictureLoaderTask(Context context, ImageView v, OnPictureLoaded callback) {
super();
mContext = context;
mView = v;
mCallback = callback;
}
/**
* {@inheritDoc}
*/
@Override
protected Drawable doInBackground(File... params) {
int width = mView.getMeasuredWidth();
int height = mView.getMeasuredHeight();
Bitmap bitmap = BitmapUtils.decodeBitmap(params[0], width, height);
if (bitmap != null) {
Drawable dw = new BitmapDrawable(mContext.getResources(), bitmap);
if (mCallback != null) {
for (Object o : mCallback.mRefs) {
if (!isCancelled()) {
mCallback.onPictureLoaded(o, dw);
}
}
}
return dw;
}
return null;
}
/**
* {@inheritDoc}
*/
@Override
protected void onPostExecute(Drawable result) {
if (!isCancelled()) {
mView.setImageDrawable(result);
}
}
}
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