Questions CachePot helps answer.
Here is a summary of the problems cachepot helps you answer:
- How to Pass Data Between Activities
- How to Pass Data Between Fragments
- How to pass multiple data types between activities/fragments.
- How to Pass Data Between Activities and Fragments
- How to Pass Data From PageAdapter to Fragments.
Difference to other similar Libraries
- Its easy to use.
- Complete, encompassing both fragments and activities.
- Ability to pass single or multiple data or types. Easily pass custom objects or collections for example.
- No annotations or extension of classes.
DescriptionInfoDownloadExample
CachePot - Android Simple Data Cache
CachePot is a simple open source for data cache management and passing data object between Fragments(Activities) without Pacelable and Serializable.
WARNING: It would be inappropriate to pass data both ways between different android applications, it's a better way to use
Intentproperly.
Download
Gradle:
repositories {
jcenter()
}
dependencies {
compile 'com.github.kimkevin:cachepot:1.2.0’
}Maven:
<dependency>
<groupId>com.github.kimkevin</groupId>
<artifactId>cachepot</artifactId>
<version>1.2.0</version>
</dependency>Usage
It works anywhere. there're examples as below
- Between
ActivityandActivity - Between
ActivityandFragment - Between
FragmentandFragment - From
PagerAdapterto individualFragment
1. Single Type, Single Data
Push your data object to CachePot instance in your Activity or Fragment.
public void push(Object data)
KoreanFood foodItem = new KoreanFood(1, "Kimchi", "Traditional fermented Korean side dish made of vegetables")
CachePot.getInstance().push(foodItem);
// open your activity or fragmentPop your data object from CachePot after view changes
public Object pop(Class classType)
public class MainFragment extends Fragment{
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
KoreanFood foodItem = CachePot.getInstance().pop(KoreanFood.class);
}In case of Collection or Map
Push
List<KoreanFood> foodItems = new ArrayList<>();
foodItems.add(new KoreanFood(1, "Kimchi", "Traditional fermented Korean side dish made of vegetables"));
foodItems.add(new KoreanFood(2, "Kkakdugi", "A variety of kimchi in Korean cuisine"));
CachePot.getInstance().push(foodItems);
// open your activity or fragmentPop
List<KoreanFood> foodItems = CachePot.getInstance().pop(ArrayList.class);2. Single Type, Multiple Data
How to pass Object(Model) Asynchronously when using ViewPager
First push your data object with position or id to CachePot instance in FragmentStatePagerAdapter(or FragmentPagerAdapter)
public void push(long id, Object data)
private class PagerAdapter extends FragmentStatePagerAdapter {
...
public Fragment getItem(int position) {
KoreanFood foodItem = foodItems.get(position);
CachePot.getInstance().push(position, foodItem);
// or
CachePot.getInstance().push(foodItem.getId(), foodItem);
...
}
}public Object pop(long id)
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
...
if (getArguments() != null) {
final int position = getArguments().getInt(ARG_POSITION);
foodItem = CachePot.getInstance().pop(position);
// or
foodItem = CachePot.getInstance().pop(id);
}
}If more complecated views, use TAG
public void push(String tag, Object data)
public void push(String tag, long id, Object data)
private class PagerAdapter extends FragmentStatePagerAdapter {
...
public Fragment getItem(int position) {
KoreanFood foodItem = foodItems.get(position);
CachePot.getInstance().push(TAG, position, foodItem);
// or
CachePot.getInstance().push(TAG, foodItem.getId(), foodItem);
...
}
}public Object pop(String tag)
public Object pop(String tag, long id)
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
...
if (getArguments() != null) {
final int position = getArguments().getInt(ARG_POSITION);
foodItem = CachePot.getInstance().pop(TAG, position);
// or
foodItem = CachePot.getInstance().pop(TAG, id);
}
}Contributing
All contributions are welcome. Open a Pull Requests or refer to the Issues section.
License
MIT
Copyright (c) 2016-present, “KimKevin” Yongjun Kim
Android Data Object Cache Management
Here is a usage example in a Fragment:
|
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public class FoodFragment extends Fragment { private static final String TAG = FoodFragment.class.getSimpleName(); private static String ARG_POSITION = "position"; private TextView txt; private Button btn; private KoreanFood koreanFoodItem; public static FoodFragment newInstance(int position) { FoodFragment fragment = new FoodFragment(); Bundle args = new Bundle(); args.putInt(ARG_POSITION, position); fragment.setArguments(args); return fragment; } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); if (getArguments() != null) { final int position = getArguments().getInt(ARG_POSITION); koreanFoodItem = CachePot.getInstance().pop(position); } } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.fragment_food, container, false); txt = (TextView) rootView.findViewById(R.id.main_txt); btn = (Button) rootView.findViewById(R.id.main_btn); return rootView; } @Override public void onViewCreated(View view, Bundle savedInstanceState) { super.onViewCreated(view, savedInstanceState); if (koreanFoodItem == null) return; txt.setText("It's " + koreanFoodItem.getName()); btn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { CachePot.getInstance().push(koreanFoodItem); NaviUtil.addFragment(getActivity(), new FoodDetailFragment()); } }); } } |
Here is another example usage with a page adapter:
|
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public class JarFragment extends Fragment { private static final String TAG = JarFragment.class.getSimpleName(); private ViewPager mViewPager; private List<KoreanFood> foodItems; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); foodItems = new ArrayList<>(); foodItems.add(new KoreanFood(1, "Kimchi", "Traditional fermented Korean side dish made of vegetables")); foodItems.add(new KoreanFood(2, "Kkakdugi", "A variety of kimchi in Korean cuisine")); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.fragment_main, container, false); mViewPager = (ViewPager) rootView.findViewById(R.id.main_pager); return rootView; } @Override public void onViewCreated(View view, Bundle savedInstanceState) { super.onViewCreated(view, savedInstanceState); PagerAdapter mPagerAdapter = new PagerAdapter(getFragmentManager()); mViewPager.setAdapter(mPagerAdapter); } private class PagerAdapter extends FragmentStatePagerAdapter { public PagerAdapter(FragmentManager fm) { super(fm); } @Override public Fragment getItem(int position) { /** * Put your Obejct with Position to DataCache */ CachePot.getInstance().push(position, foodItems.get(position)); return FoodFragment.newInstance(position); } @Override public int getCount() { return foodItems.size(); } } } |
Find full example in the download
