org.bwgz.quotation.activity.CursorLoaderManagerActivity.java Source code

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Here is the source code for org.bwgz.quotation.activity.CursorLoaderManagerActivity.java

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/*
 * Copyright (C) 2014 bwgz.org
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 3 as 
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.bwgz.quotation.activity;

import java.util.HashMap;
import java.util.Map;

import org.bwgz.quotation.core.CursorLoaderManager;

import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.content.CursorLoader;
import android.support.v4.content.Loader;
import android.util.Log;
import android.util.SparseArray;

public class CursorLoaderManagerActivity extends VolleyActivity implements CursorLoaderManager {
    static public final String TAG = CursorLoaderManagerActivity.class.getSimpleName();

    private int loaderId;
    private SparseArray<CursorLoaderListener> loaderIdMap;

    protected synchronized int getNextLoaderId() {
        return loaderId++;
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        loaderIdMap = new SparseArray<CursorLoaderListener>();
    }

    @Override
    public int initLoader(CursorLoaderListener listener, Bundle bundle) {
        int loaderId = getNextLoaderId();

        getSupportLoaderManager().initLoader(loaderId, bundle, this);
        loaderIdMap.put(loaderId, listener);

        return loaderId;
    }

    @Override
    public void destroyLoader(int id) {
        Log.d(TAG, String.format("destroyLoader - id: %d", id));
        getSupportLoaderManager().destroyLoader(id);
        loaderIdMap.remove(id);
    }

    @Override
    public int initLoader(CursorLoaderListener listener, Uri uri, String[] projection, String selection,
            String[] selectionArgs, String sortOrder) {
        //Log.d(TAG, String.format("onPickLoad - view: %s  uri: %s  projection: %s  selection: %s  selectionArgs: %s  String sortOrder: %s", view, uri, projection, selection, selectionArgs, sortOrder));

        Bundle bundle = new Bundle();
        bundle.putParcelable(LOADER_BUNDLE_URI, uri);
        bundle.putStringArray(LOADER_BUNDLE_PROJECTION, projection);
        bundle.putString(LOADER_BUNDLE_SELECTION, selection);
        bundle.putStringArray(LOADER_BUNDLE_SELECTION_ARGS, selectionArgs);
        bundle.putString(LOADER_BUNDLE_SORT_ORDER, sortOrder);

        return initLoader(listener, bundle);
    }

    @Override
    public Loader<Cursor> onCreateLoader(int id, Bundle bundle) {
        Log.d(TAG, String.format("onCreateLoader - id: %d  bundle: %s", id, bundle));

        Uri uri = bundle.getParcelable(LOADER_BUNDLE_URI);
        String[] projection = bundle.getStringArray(LOADER_BUNDLE_PROJECTION);
        String selection = bundle.getString(LOADER_BUNDLE_SELECTION);
        String[] selectionArgs = bundle.getStringArray(LOADER_BUNDLE_SELECTION_ARGS);
        String sortOrder = bundle.getString(LOADER_BUNDLE_SORT_ORDER);

        Log.d(TAG, String.format("onCreateLoader - uri: %s", uri));

        return new CursorLoader(this, uri, projection, selection, selectionArgs, sortOrder);
    }

    @Override
    public void onLoadFinished(Loader<Cursor> loader, Cursor cursor) {
        Log.d(TAG,
                String.format("onLoadFinished - loader: %s  cursor: %s (%d)", loader, cursor, cursor.getCount()));

        CursorLoaderListener listener = loaderIdMap.get(loader.getId());
        if (listener != null) {
            listener.onCursorLoadFinished(loader, cursor);
        }
    }

    @Override
    public void onLoaderReset(Loader<Cursor> loader) {
        Log.d(TAG, String.format("onLoaderReset - loader: %s", loader));
    }
}