com.github.riotopsys.malforandroid2.adapter.DynamicPagerAdapter.java Source code

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Here is the source code for com.github.riotopsys.malforandroid2.adapter.DynamicPagerAdapter.java

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/**
 * Copyright 2013 C. A. Fitzgerald
 *
 *  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.github.riotopsys.malforandroid2.adapter;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.util.Log;

import com.google.inject.Inject;

public class DynamicPagerAdapter extends FragmentPagerAdapter {

    private static final String TAG = DynamicPagerAdapter.class.getSimpleName();

    private Map<String, Fragment> fragmentIndex = new HashMap<String, Fragment>();
    private List<String> indexOrder = new ArrayList<String>();

    public void addFragment(String title, Fragment fragment) {
        fragmentIndex.put(title, fragment);
        indexOrder.add(title);
        notifyDataSetChanged();
    }

    public void removeFragment(String title) {
        fragmentIndex.remove(title);
        indexOrder.remove(title);
        notifyDataSetChanged();
    }

    public int getPosition(String title) {
        return indexOrder.indexOf(title);
    }

    @Inject
    public DynamicPagerAdapter(FragmentManager fm) {
        super(fm);
    }

    @Override
    public Fragment getItem(int position) {
        Log.i(TAG, String.format("get %d", position));
        return fragmentIndex.get(indexOrder.get(position));
    }

    @Override
    public int getCount() {
        return indexOrder.size();
    }

    @Override
    public CharSequence getPageTitle(int position) {
        return indexOrder.get(position);
    }

    @Override
    public int getItemPosition(Object object) {
        Fragment f = (Fragment) object;
        for (int i = 0; i < getCount(); i++) {

            Fragment item = (Fragment) getItem(i);
            if (item.equals(f)) {
                return i;
            }
        }
        return POSITION_NONE;
    }

}