Make background media saving a service

bug:8091328
Change-Id: If35c1832238e921b6582d8642fdbaa4378ea0c48

1 files changed, 155 insertions, 0 deletions

diff --git a/src/com/android/camera/MediaSaveService.java b/src/com/android/camera/MediaSaveService.java
new file mode 100644
index 000000000..f8719756c
--- /dev/null
+++ b/src/com/android/camera/MediaSaveService.java
@@ -0,0 +1,155 @@
+/*
+ * 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;
+
+import java.util.ArrayList;
+
+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 onQueueAvailable();
+        public void onQueueFull();
+    }
+
+    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;
+        if (isQueueFull()) {
+            l.onQueueFull();
+        } else {
+            l.onQueueAvailable();
+        }
+    }
+
+    private void onQueueFull() {
+        if (mListener != null) mListener.onQueueFull();
+    }
+
+    private void onQueueAvailable() {
+        if (mListener != null) mListener.onQueueAvailable();
+    }
+
+    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();
+        }
+    }
+}