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/*
* Copyright (C) 2013 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.app.Service;
import android.content.ContentResolver;
import android.content.Intent;
import android.location.Location;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Binder;
import android.os.IBinder;
import android.util.Log;
/*
* Service for saving images in the background thread.
*/
public class MediaSaveService extends Service {
private static final int SAVE_TASK_LIMIT = 3;
private static final String TAG = MediaSaveService.class.getSimpleName();
private final IBinder mBinder = new LocalBinder();
private int mTaskNumber;
private Listener mListener;
interface Listener {
public void onQueueStatus(boolean full);
}
interface OnMediaSavedListener {
public void onMediaSaved(Uri uri);
}
class LocalBinder extends Binder {
public MediaSaveService getService() {
return MediaSaveService.this;
}
}
@Override
public IBinder onBind(Intent intent) {
return mBinder;
}
@Override
public int onStartCommand(Intent intent, int flag, int startId) {
return START_STICKY;
}
@Override
public void onDestroy() {
}
@Override
public void onCreate() {
mTaskNumber = 0;
}
public boolean isQueueFull() {
return (mTaskNumber >= SAVE_TASK_LIMIT);
}
// Runs in main thread
public void addImage(final byte[] data, String title, long date, Location loc,
int width, int height, int orientation,
OnMediaSavedListener l, ContentResolver resolver) {
if (isQueueFull()) {
Log.e(TAG, "Cannot add image when the queue is full");
return;
}
SaveTask t = new SaveTask(data, title, date, (loc == null) ? null : new Location(loc),
width, height, orientation, resolver, l);
mTaskNumber++;
if (isQueueFull()) {
onQueueFull();
}
t.execute();
}
public void setListener(Listener l) {
mListener = l;
if (l == null) return;
l.onQueueStatus(isQueueFull());
}
private void onQueueFull() {
if (mListener != null) mListener.onQueueStatus(true);
}
private void onQueueAvailable() {
if (mListener != null) mListener.onQueueStatus(false);
}
private class SaveTask extends AsyncTask <Void, Void, Uri> {
private byte[] data;
private String title;
private long date;
private Location loc;
private int width, height;
private int orientation;
private ContentResolver resolver;
private OnMediaSavedListener listener;
public SaveTask(byte[] data, String title, long date, Location loc,
int width, int height, int orientation, ContentResolver resolver,
OnMediaSavedListener listener) {
this.data = data;
this.title = title;
this.date = date;
this.loc = loc;
this.width = width;
this.height = height;
this.orientation = orientation;
this.resolver = resolver;
this.listener = listener;
}
@Override
protected void onPreExecute() {
// do nothing.
}
@Override
protected Uri doInBackground(Void... v) {
return Storage.addImage(
resolver, title, date, loc, orientation, data, width, height);
}
@Override
protected void onPostExecute(Uri uri) {
listener.onMediaSaved(uri);
mTaskNumber--;
if (mTaskNumber == SAVE_TASK_LIMIT - 1) onQueueAvailable();
}
}
}
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