src/com/android/camera/data/CameraDataAdapter.java - fp2-dev/platform/packages/apps/Camera2 - Gitiles

 /*
  * 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.data;

 import android.content.ContentResolver;
 import android.content.Context;
 import android.database.Cursor;
 import android.graphics.drawable.Drawable;
 import android.net.Uri;
 import android.os.AsyncTask;
 import android.provider.MediaStore;
 import android.util.Log;
 import android.view.View;

 import com.android.camera.Storage;
 import com.android.camera.ui.FilmStripView.ImageData;

 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.Comparator;
 import java.util.List;

 /**
  * A {@link LocalDataAdapter} that provides data in the camera folder.
  */
 public class CameraDataAdapter implements LocalDataAdapter {
     private static final String TAG = "CAM_CameraDataAdapter";

     private static final int DEFAULT_DECODE_SIZE = 3000;
     private static final String[] CAMERA_PATH = { Storage.DIRECTORY + "%" };

     private List<LocalData> mImages;

     private Listener mListener;
     private Drawable mPlaceHolder;

     private int mSuggestedWidth = DEFAULT_DECODE_SIZE;
     private int mSuggestedHeight = DEFAULT_DECODE_SIZE;

     private LocalData mLocalDataToDelete;

     public CameraDataAdapter(Drawable placeHolder) {
         mImages = new ArrayList<LocalData>();
         mPlaceHolder = placeHolder;
     }

     @Override
     public void requestLoad(ContentResolver resolver) {
         QueryTask qtask = new QueryTask();
         qtask.execute(resolver);
     }

     @Override
     public LocalData getLocalData(int dataID) {
         if (dataID < 0 || dataID >= mImages.size()) {
             return null;
         }

         return mImages.get(dataID);
     }

     @Override
     public int getTotalNumber() {
         return mImages.size();
     }

     @Override
     public ImageData getImageData(int id) {
         return getLocalData(id);
     }

     @Override
     public void suggestViewSizeBound(int w, int h) {
         if (w <= 0 || h <= 0) {
             mSuggestedWidth  = mSuggestedHeight = DEFAULT_DECODE_SIZE;
         } else {
             mSuggestedWidth = (w < DEFAULT_DECODE_SIZE ? w : DEFAULT_DECODE_SIZE);
             mSuggestedHeight = (h < DEFAULT_DECODE_SIZE ? h : DEFAULT_DECODE_SIZE);
         }
     }

     @Override
     public View getView(Context c, int dataID) {
         if (dataID >= mImages.size() || dataID < 0) {
             return null;
         }

         return mImages.get(dataID).getView(
                 c, mSuggestedWidth, mSuggestedHeight,
                 mPlaceHolder.getConstantState().newDrawable());
     }

     @Override
     public void setListener(Listener listener) {
         mListener = listener;
         if (mImages != null) {
             mListener.onDataLoaded();
         }
     }

     @Override
     public void onDataFullScreen(int dataID, boolean fullScreen) {
         if (dataID < mImages.size() && dataID >= 0) {
             mImages.get(dataID).onFullScreen(fullScreen);
         }
     }

     @Override
     public boolean canSwipeInFullScreen(int dataID) {
         if (dataID < mImages.size() && dataID > 0) {
             return mImages.get(dataID).canSwipeInFullScreen();
         }
         return true;
     }

     @Override
     public void removeData(Context c, int dataID) {
         if (dataID >= mImages.size()) return;
         LocalData d = mImages.remove(dataID);
         // Delete previously removed data first.
         executeDeletion(c);
         mLocalDataToDelete = d;
         mListener.onDataRemoved(dataID, d);
     }

     // TODO: put the database query on background thread
     @Override
     public void addNewVideo(ContentResolver cr, Uri uri) {
         Cursor c = cr.query(uri,
                 LocalMediaData.VideoData.QUERY_PROJECTION,
                 MediaStore.Images.Media.DATA + " like ? ", CAMERA_PATH,
                 LocalMediaData.VideoData.QUERY_ORDER);
         if (c == null || !c.moveToFirst()) {
             return;
         }
         int pos = findDataByContentUri(uri);
         LocalMediaData.VideoData newData = LocalMediaData.VideoData.buildFromCursor(c);
         if (pos != -1) {
             // A duplicate one, just do a substitute.
             updateData(pos, newData);
         } else {
             // A new data.
             insertData(newData);
         }
     }

     // TODO: put the database query on background thread
     @Override
     public void addNewPhoto(ContentResolver cr, Uri uri) {
         Cursor c = cr.query(uri,
                 LocalMediaData.PhotoData.QUERY_PROJECTION,
                 MediaStore.Images.Media.DATA + " like ? ", CAMERA_PATH,
                 LocalMediaData.PhotoData.QUERY_ORDER);
         if (c == null || !c.moveToFirst()) {
             return;
         }
         int pos = findDataByContentUri(uri);
         LocalMediaData.PhotoData newData = LocalMediaData.PhotoData.buildFromCursor(c);
         if (pos != -1) {
             // a duplicate one, just do a substitute.
             Log.v(TAG, "found duplicate photo");
             updateData(pos, newData);
         } else {
             // a new data.
             insertData(newData);
         }
     }

     @Override
     public int findDataByContentUri(Uri uri) {
         for (int i = 0; i < mImages.size(); i++) {
             Uri u = mImages.get(i).getContentUri();
             if (u == null) {
                 continue;
             }
             if (u.equals(uri)) {
                 return i;
             }
         }
         return -1;
     }

     @Override
     public boolean undoDataRemoval() {
         if (mLocalDataToDelete == null) return false;
         LocalData d = mLocalDataToDelete;
         mLocalDataToDelete = null;
         insertData(d);
         return true;
     }

     @Override
     public boolean executeDeletion(Context c) {
         if (mLocalDataToDelete == null) return false;

         DeletionTask task = new DeletionTask(c);
         task.execute(mLocalDataToDelete);
         mLocalDataToDelete = null;
         return true;
     }

     @Override
     public void flush() {
         replaceData(new ArrayList<LocalData>());
     }

     @Override
     public void refresh(ContentResolver resolver, Uri contentUri) {
         int pos = findDataByContentUri(contentUri);
         if (pos == -1) {
             return;
         }

         LocalData data = mImages.get(pos);
         if (data.refresh(resolver)) {
             updateData(pos, data);
         }
     }

     @Override
     public void updateData(final int pos, LocalData data) {
         mImages.set(pos, data);
         if (mListener != null) {
             mListener.onDataUpdated(new UpdateReporter() {
                 @Override
                 public boolean isDataRemoved(int dataID) {
                     return false;
                 }

                 @Override
                 public boolean isDataUpdated(int dataID) {
                     return (dataID == pos);
                 }
             });
         }
     }

     @Override
     public void insertData(LocalData data) {
         // Since this function is mostly for adding the newest data,
         // a simple linear search should yield the best performance over a
         // binary search.
         int pos = 0;
         Comparator<LocalData> comp = new LocalData.NewestFirstComparator();
         for (; pos < mImages.size()
                 && comp.compare(data, mImages.get(pos)) > 0; pos++);
         mImages.add(pos, data);
         if (mListener != null) {
             mListener.onDataInserted(pos, data);
         }
     }

     /** Update all the data */
     private void replaceData(List<LocalData> list) {
         if (list.size() == 0 && mImages.size() == 0) {
             return;
         }
         mImages = list;
         if (mListener != null) {
             mListener.onDataLoaded();
         }
     }

     private class QueryTask extends AsyncTask<ContentResolver, Void, List<LocalData>> {

         /**
          * Loads all the photo and video data in the camera folder in background
          * and combine them into one single list.
          *
          * @param resolver {@link ContentResolver} to load all the data.
          * @return An {@link ArrayList} of all loaded data.
          */
         @Override
         protected List<LocalData> doInBackground(ContentResolver... resolver) {
             List<LocalData> l = new ArrayList<LocalData>();
             // Photos
             Cursor c = resolver[0].query(
                     LocalMediaData.PhotoData.CONTENT_URI,
                     LocalMediaData.PhotoData.QUERY_PROJECTION,
                     MediaStore.Images.Media.DATA + " like ? ", CAMERA_PATH,
                     LocalMediaData.PhotoData.QUERY_ORDER);
             if (c != null && c.moveToFirst()) {
                 // build up the list.
                 while (true) {
                     LocalData data = LocalMediaData.PhotoData.buildFromCursor(c);
                     if (data != null) {
                         l.add(data);
                     } else {
                         Log.e(TAG, "Error loading data:"
                                 + c.getString(LocalMediaData.PhotoData.COL_DATA));
                     }
                     if (c.isLast()) {
                         break;
                     }
                     c.moveToNext();
                 }
             }
             if (c != null) {
                 c.close();
             }

             c = resolver[0].query(
                     LocalMediaData.VideoData.CONTENT_URI,
                     LocalMediaData.VideoData.QUERY_PROJECTION,
                     MediaStore.Video.Media.DATA + " like ? ", CAMERA_PATH,
                     LocalMediaData.VideoData.QUERY_ORDER);
             if (c != null && c.moveToFirst()) {
                 // build up the list.
                 c.moveToFirst();
                 while (true) {
                     LocalData data = LocalMediaData.VideoData.buildFromCursor(c);
                     if (data != null) {
                         l.add(data);
                     } else {
                         Log.e(TAG, "Error loading data:"
                                 + c.getString(LocalMediaData.VideoData.COL_DATA));
                     }
                     if (!c.isLast()) {
                         c.moveToNext();
                     } else {
                         break;
                     }
                 }
             }
             if (c != null) {
                 c.close();
             }

             if (l.size() != 0) {
                 Collections.sort(l, new LocalData.NewestFirstComparator());
             }

             return l;
         }

         @Override
         protected void onPostExecute(List<LocalData> l) {
             replaceData(l);
         }
     }

     private class DeletionTask extends AsyncTask<LocalData, Void, Void> {
         Context mContext;

         DeletionTask(Context context) {
             mContext = context;
         }

         @Override
         protected Void doInBackground(LocalData... data) {
             for (int i = 0; i < data.length; i++) {
                 if (!data[i].isDataActionSupported(LocalData.ACTION_DELETE)) {
                     Log.v(TAG, "Deletion is not supported:" + data[i]);
                     continue;
                 }
                 data[i].delete(mContext);
             }
             return null;
         }
     }
 }
	/*
	* 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.data;

	import android.content.ContentResolver;
	import android.content.Context;
	import android.database.Cursor;
	import android.graphics.drawable.Drawable;
	import android.net.Uri;
	import android.os.AsyncTask;
	import android.provider.MediaStore;
	import android.util.Log;
	import android.view.View;

	import com.android.camera.Storage;
	import com.android.camera.ui.FilmStripView.ImageData;

	import java.util.ArrayList;
	import java.util.Collections;
	import java.util.Comparator;
	import java.util.List;

	/**
	* A {@link LocalDataAdapter} that provides data in the camera folder.
	*/
	public class CameraDataAdapter implements LocalDataAdapter {
	private static final String TAG = "CAM_CameraDataAdapter";

	private static final int DEFAULT_DECODE_SIZE = 3000;
	private static final String[] CAMERA_PATH = { Storage.DIRECTORY + "%" };

	private List<LocalData> mImages;

	private Listener mListener;
	private Drawable mPlaceHolder;

	private int mSuggestedWidth = DEFAULT_DECODE_SIZE;
	private int mSuggestedHeight = DEFAULT_DECODE_SIZE;

	private LocalData mLocalDataToDelete;

	public CameraDataAdapter(Drawable placeHolder) {
	mImages = new ArrayList<LocalData>();
	mPlaceHolder = placeHolder;
	}

	@Override
	public void requestLoad(ContentResolver resolver) {
	QueryTask qtask = new QueryTask();
	qtask.execute(resolver);
	}

	@Override
	public LocalData getLocalData(int dataID) {
	if (dataID < 0 \|\| dataID >= mImages.size()) {
	return null;
	}

	return mImages.get(dataID);
	}

	@Override
	public int getTotalNumber() {
	return mImages.size();
	}

	@Override
	public ImageData getImageData(int id) {
	return getLocalData(id);
	}

	@Override
	public void suggestViewSizeBound(int w, int h) {
	if (w <= 0 \|\| h <= 0) {
	mSuggestedWidth = mSuggestedHeight = DEFAULT_DECODE_SIZE;
	} else {
	mSuggestedWidth = (w < DEFAULT_DECODE_SIZE ? w : DEFAULT_DECODE_SIZE);
	mSuggestedHeight = (h < DEFAULT_DECODE_SIZE ? h : DEFAULT_DECODE_SIZE);
	}
	}

	@Override
	public View getView(Context c, int dataID) {
	if (dataID >= mImages.size() \|\| dataID < 0) {
	return null;
	}

	return mImages.get(dataID).getView(
	c, mSuggestedWidth, mSuggestedHeight,
	mPlaceHolder.getConstantState().newDrawable());
	}

	@Override
	public void setListener(Listener listener) {
	mListener = listener;
	if (mImages != null) {
	mListener.onDataLoaded();
	}
	}

	@Override
	public void onDataFullScreen(int dataID, boolean fullScreen) {
	if (dataID < mImages.size() && dataID >= 0) {
	mImages.get(dataID).onFullScreen(fullScreen);
	}
	}

	@Override
	public boolean canSwipeInFullScreen(int dataID) {
	if (dataID < mImages.size() && dataID > 0) {
	return mImages.get(dataID).canSwipeInFullScreen();
	}
	return true;
	}

	@Override
	public void removeData(Context c, int dataID) {
	if (dataID >= mImages.size()) return;
	LocalData d = mImages.remove(dataID);
	// Delete previously removed data first.
	executeDeletion(c);
	mLocalDataToDelete = d;
	mListener.onDataRemoved(dataID, d);
	}

	// TODO: put the database query on background thread
	@Override
	public void addNewVideo(ContentResolver cr, Uri uri) {
	Cursor c = cr.query(uri,
	LocalMediaData.VideoData.QUERY_PROJECTION,
	MediaStore.Images.Media.DATA + " like ? ", CAMERA_PATH,
	LocalMediaData.VideoData.QUERY_ORDER);
	if (c == null \|\| !c.moveToFirst()) {
	return;
	}
	int pos = findDataByContentUri(uri);
	LocalMediaData.VideoData newData = LocalMediaData.VideoData.buildFromCursor(c);
	if (pos != -1) {
	// A duplicate one, just do a substitute.
	updateData(pos, newData);
	} else {
	// A new data.
	insertData(newData);
	}
	}

	// TODO: put the database query on background thread
	@Override
	public void addNewPhoto(ContentResolver cr, Uri uri) {
	Cursor c = cr.query(uri,
	LocalMediaData.PhotoData.QUERY_PROJECTION,
	MediaStore.Images.Media.DATA + " like ? ", CAMERA_PATH,
	LocalMediaData.PhotoData.QUERY_ORDER);
	if (c == null \|\| !c.moveToFirst()) {
	return;
	}
	int pos = findDataByContentUri(uri);
	LocalMediaData.PhotoData newData = LocalMediaData.PhotoData.buildFromCursor(c);
	if (pos != -1) {
	// a duplicate one, just do a substitute.
	Log.v(TAG, "found duplicate photo");
	updateData(pos, newData);
	} else {
	// a new data.
	insertData(newData);
	}
	}

	@Override
	public int findDataByContentUri(Uri uri) {
	for (int i = 0; i < mImages.size(); i++) {
	Uri u = mImages.get(i).getContentUri();
	if (u == null) {
	continue;
	}
	if (u.equals(uri)) {
	return i;
	}
	}
	return -1;
	}

	@Override
	public boolean undoDataRemoval() {
	if (mLocalDataToDelete == null) return false;
	LocalData d = mLocalDataToDelete;
	mLocalDataToDelete = null;
	insertData(d);
	return true;
	}

	@Override
	public boolean executeDeletion(Context c) {
	if (mLocalDataToDelete == null) return false;

	DeletionTask task = new DeletionTask(c);
	task.execute(mLocalDataToDelete);
	mLocalDataToDelete = null;
	return true;
	}

	@Override
	public void flush() {
	replaceData(new ArrayList<LocalData>());
	}

	@Override
	public void refresh(ContentResolver resolver, Uri contentUri) {
	int pos = findDataByContentUri(contentUri);
	if (pos == -1) {
	return;
	}

	LocalData data = mImages.get(pos);
	if (data.refresh(resolver)) {
	updateData(pos, data);
	}
	}

	@Override
	public void updateData(final int pos, LocalData data) {
	mImages.set(pos, data);
	if (mListener != null) {
	mListener.onDataUpdated(new UpdateReporter() {
	@Override
	public boolean isDataRemoved(int dataID) {
	return false;
	}

	@Override
	public boolean isDataUpdated(int dataID) {
	return (dataID == pos);
	}
	});
	}
	}

	@Override
	public void insertData(LocalData data) {
	// Since this function is mostly for adding the newest data,
	// a simple linear search should yield the best performance over a
	// binary search.
	int pos = 0;
	Comparator<LocalData> comp = new LocalData.NewestFirstComparator();
	for (; pos < mImages.size()
	&& comp.compare(data, mImages.get(pos)) > 0; pos++);
	mImages.add(pos, data);
	if (mListener != null) {
	mListener.onDataInserted(pos, data);
	}
	}

	/** Update all the data */
	private void replaceData(List<LocalData> list) {
	if (list.size() == 0 && mImages.size() == 0) {
	return;
	}
	mImages = list;
	if (mListener != null) {
	mListener.onDataLoaded();
	}
	}

	private class QueryTask extends AsyncTask<ContentResolver, Void, List<LocalData>> {

	/**
	* Loads all the photo and video data in the camera folder in background
	* and combine them into one single list.
	*
	* @param resolver {@link ContentResolver} to load all the data.
	* @return An {@link ArrayList} of all loaded data.
	*/
	@Override
	protected List<LocalData> doInBackground(ContentResolver... resolver) {
	List<LocalData> l = new ArrayList<LocalData>();
	// Photos
	Cursor c = resolver[0].query(
	LocalMediaData.PhotoData.CONTENT_URI,
	LocalMediaData.PhotoData.QUERY_PROJECTION,
	MediaStore.Images.Media.DATA + " like ? ", CAMERA_PATH,
	LocalMediaData.PhotoData.QUERY_ORDER);
	if (c != null && c.moveToFirst()) {
	// build up the list.
	while (true) {
	LocalData data = LocalMediaData.PhotoData.buildFromCursor(c);
	if (data != null) {
	l.add(data);
	} else {
	Log.e(TAG, "Error loading data:"
	+ c.getString(LocalMediaData.PhotoData.COL_DATA));
	}
	if (c.isLast()) {
	break;
	}
	c.moveToNext();
	}
	}
	if (c != null) {
	c.close();
	}

	c = resolver[0].query(
	LocalMediaData.VideoData.CONTENT_URI,
	LocalMediaData.VideoData.QUERY_PROJECTION,
	MediaStore.Video.Media.DATA + " like ? ", CAMERA_PATH,
	LocalMediaData.VideoData.QUERY_ORDER);
	if (c != null && c.moveToFirst()) {
	// build up the list.
	c.moveToFirst();
	while (true) {
	LocalData data = LocalMediaData.VideoData.buildFromCursor(c);
	if (data != null) {
	l.add(data);
	} else {
	Log.e(TAG, "Error loading data:"
	+ c.getString(LocalMediaData.VideoData.COL_DATA));
	}
	if (!c.isLast()) {
	c.moveToNext();
	} else {
	break;
	}
	}
	}
	if (c != null) {
	c.close();
	}

	if (l.size() != 0) {
	Collections.sort(l, new LocalData.NewestFirstComparator());
	}

	return l;
	}

	@Override
	protected void onPostExecute(List<LocalData> l) {
	replaceData(l);
	}
	}

	private class DeletionTask extends AsyncTask<LocalData, Void, Void> {
	Context mContext;

	DeletionTask(Context context) {
	mContext = context;
	}

	@Override
	protected Void doInBackground(LocalData... data) {
	for (int i = 0; i < data.length; i++) {
	if (!data[i].isDataActionSupported(LocalData.ACTION_DELETE)) {
	Log.v(TAG, "Deletion is not supported:" + data[i]);
	continue;
	}
	data[i].delete(mContext);
	}
	return null;
	}
	}
	}