Fragment State Manager


Source link: https://github.com/okaybroda/FragmentStateManager

FragmentStateManager

An Android library that holds fragment states for BottomNavigationView. Saves fragment back stack even after activity rotation. Implementation derived from FragmentStatePagerAdapter.

Installation

Add Jitpack to project level gradle file

allprojects {

  repositories {

maven {
 url "https://jitpack.io" 
}

  
}
 
}

Then add library to module level gradle file

dependencies {

compile 'com.github.okaybroda:FragmentStateManager:1.+' 
}

Usage

Create a FragmentStateManager instance in the OnCreate function of your Activity

FragmentStateManager fragmentStateManager;  @Override protected void onCreate(Bundle savedInstanceState) {

  // ... your code ...
  FrameLayout content = findViewById(R.id.content);

  fragmentStateManager = new FragmentStateManager(content, getSupportFragmentManager()) {

 @Override

 public Fragment getItem(int position) {

  switch (position) {

case 0:

 return new MainFragment();

case 1:

 return new SearchFragment();

case 2:

 return new MeFragment();

  
}

 
}

}
; 
}

To change current fragment, call

fragmentStateManager.changeFragment(0);
 // 0 is the index of the fragment

Integration with BottomNavigationView

Add item selected listener

navigation.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {

  @Override
  public boolean onNavigationItemSelected(@NonNull MenuItem item) {

int position = getNavPositionFromMenuItem(item);

if (position != -1) {

 fragmentStateManager.changeFragment(getNavPositionFromMenuItem(item));

 return true;

}

 return false;
  
}
 
}
);

(Optional) Add item reselected listener. This will reset the fragment to it's original state

navigation.setOnNavigationItemReselectedListener(new BottomNavigationView.OnNavigationItemReselectedListener() {

  @Override
  public void onNavigationItemReselected(@NonNull MenuItem item) {

int position = getNavPositionFromMenuItem(item);

if (position != -1) {

 fragmentStateManager.removeFragment(position);

 fragmentStateManager.changeFragment(position);

}

  
}
 
}
);

Resources

Nox

Nox is an Android library created to show a custom view with some NoxItem instances inside which are drawn following a shape indicated by the library user. You can create you own Shape implementations if you want, by default there are some interesting Shape implementations to show NoxItem instances following a circular, spiral or linear shape.

Simple Android URL Media Player.

One-click screenshots, video recordings, APK installations for Android phones and smart watches connected to your Mac.

If you like developing Android, you must "hate" Spinners. I had countless issues with Spinners and I decided to make a new one. BetterSpinner is using AutoCompleteTextView to do what a Spinner really should do.

A collection of TextWatchers for Android, it comes with CPF/CNPJ formatting, and a Brazil telephone.

A quick and simple way to paint your Drawables the color you want.

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