ArrayPagerAdapter

Small and simple library that has custom ViewPager adapters which are able to change data dynamically.

Sample application is available on the Play Store.

Usage

This library includes 3 useful adapters like general ViewPager's : FragmentStatePagerAdapter, FragmentPagerAdapter, and PagerAdapter.

ArrayPagerAdapters contain items passed from outside internally. You can change data dynamically by calling adapter's methods like add(T item), remove(int position).

1 ArrayFragmentStatePagerAdapter

Implemented based on android.support.v4.app.FragmentStatePagerAdapter.

Like FragmentStatePagerAdapter, it is recommended to use this adapter if there are large number of pages or need to save fragments' and items' state. This adapter handles saving and restoring of fragments' and items' state.

Subclasses only need to implement getFragment(T item, int position) and return a fragment that display the page.

Here is a simple example implementation of ArrayFragmentStatePagerAdapter.

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_pager);
    MyStatePagerAdapter adapter = new MyStatePagerAdapter(getSupportFragmentManager(), new String[]{"1", "2", "3"});
    ((ViewPager)findViewById(R.id.view_pager)).setAdapter(adapter);
}

class MyStatePagerAdapter extends ArrayFragmentStatePagerAdapter<String> {

    public MyStatePagerAdapter(FragmentManager fm, String[] datas) {
        super(fm, datas);
    }

    @Override
    public Fragment getFragment(String item, int position) {
        return MyFragment.newInstance(item);
    }
}

Constraints: Item class (generic type T) must be implementation of Serializable or Parcelable because the adapter automatically save and restore items state. For example, above example use String that is implementation of Serializable.

2 ArrayFragmentPagerAdapter

Implemented based on android.support.v4.app.FragmentPagerAdapter.

Compared to ArrayFragmentStatePagerAdapter, you can use this adapter if there is a few number of pages and no need to save states (or implement by yourself).

Usage is almost the same as ArrayFragmentStatePagerAdapter, and item class does not need to implement Serializable or Parcelable.

class MyFragmentPagerAdapter extends ArrayFragmentPagerAdapter<String> {

    public MyFragmentPagerAdapter(FragmentManager fm, String[] datas) {
        super(fm, datas);
    }

    @Override
    public Fragment getFragment(String item, int position) {
        return MyFragment.newInstance(item);
    }
}

3 ArrayViewPagerAdapter

If you want to use View to create page, you can use this adapter. Subclass of ArrayViewPagerAdapter just need to implement getView() and return a view of the page.

class MyPagerAdapter extends ArrayViewPagerAdapter<String> {

    public MyPagerAdapter(String[] data) {
        super(data);
    }

    @Override
    public View getView(LayoutInflater inflater, ViewGroup container, String item, int position) {
        View v = inflater.inflate(R.layout.item_page, container, false);
        ((TextView) v.findViewById(R.id.item_txt)).setText(item);
        return v;
    }
}

Dynamic item changing

All of these adapters are subclass of ArrayPagerAdapter and have following methods to support dynamic data changing.

void add(T item)
void add(int index, T item)
void addAll(T... items)
void addAll(List<T> items)
void remove(int position)
void clear()

You don't need to call notifyDataSetChanged() since it is called internally when you call above methods.

Sample

Sample usage is available in demo directory.

Download

compile 'com.nakama.arraypageradapter:arraypageradapter:0.1.3'

License

Copyright (C) 2015 Takaaki Nakama (http://rane.jp)

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.

lucasorso / ArrayPagerAdapter