content: package com.adafruit.bluefruit.le.connect.app;
  
  import android.content.Context;
  import android.content.SharedPreferences;
  import android.os.Bundle;
  import android.view.LayoutInflater;
  import android.view.Menu;
  import android.view.MenuInflater;
  import android.view.MenuItem;
  import android.view.View;
  import android.view.ViewGroup;
  import android.widget.Button;
  import android.widget.TextView;
  
  import androidx.annotation.NonNull;
  import androidx.annotation.Nullable;
  import androidx.appcompat.app.ActionBar;
  import androidx.appcompat.app.AppCompatActivity;
  import androidx.fragment.app.Fragment;
  import androidx.fragment.app.FragmentActivity;
  import androidx.fragment.app.FragmentManager;
  import androidx.fragment.app.FragmentTransaction;
  
  import com.adafruit.bluefruit.le.connect.R;
  import com.adafruit.bluefruit.le.connect.app.neopixel.NeopixelColorPickerFragment;
  import com.larswerkman.holocolorpicker.ColorPicker;
  import com.larswerkman.holocolorpicker.SaturationBar;
  import com.larswerkman.holocolorpicker.ValueBar;
  
  public class ControllerColorPickerFragment extends Fragment implements ColorPicker.OnColorChangedListener {
      // Log
      @SuppressWarnings("unused")
      private final static String TAG = ControllerColorPickerFragment.class.getSimpleName();
  
      // Constants
      private final static boolean kPersistValues = true;
      private final static String kPreferences = "ColorPickerActivity_prefs";
      private final static String kPreferences_color = "color";
  
      private final static int kFirstTimeColor = 0x0000ff;
  
      // UI
      private ColorPicker mColorPicker;
      private View mRgbColorView;
      private TextView mRgbTextView;
  
      // Data
      private int mSelectedColor;
      private ControllerColorPickerFragmentListener mListener;
  
      // region Lifecycle
      @SuppressWarnings("UnnecessaryLocalVariable")
      public static ControllerColorPickerFragment newInstance() {
          ControllerColorPickerFragment fragment = new ControllerColorPickerFragment();
          return fragment;
      }
  
      public ControllerColorPickerFragment() {
          // Required empty public constructor
      }
  
      @Override
      public void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
  
          AppCompatActivity activity = (AppCompatActivity) getActivity();
          if (activity != null) {
              ActionBar actionBar = activity.getSupportActionBar();
              if (actionBar != null) {
                  actionBar.setTitle(R.string.colorpicker_title);
                  actionBar.setDisplayHomeAsUpEnabled(true);
              }
          }
      }
  
      @Override
      public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
          // Inflate the layout for this fragment
          return inflater.inflate(R.layout.fragment_controller_colorpicker, container, false);
      }
  
      @Override
      public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
          super.onViewCreated(view, savedInstanceState);
  
          // UI
          mRgbColorView = view.findViewById(R.id.rgbColorView);
          mRgbTextView = view.findViewById(R.id.rgbTextView);
  
          Button sendButton = view.findViewById(R.id.sendButton);
          sendButton.setOnClickListener(view1 -> {
              // Set the old color
              mColorPicker.setOldCenterColor(mSelectedColor);
              mListener.onSendColorComponents(mSelectedColor);
          });
  
          SaturationBar mSaturationBar = view.findViewById(R.id.brightnessbar);
          ValueBar mValueBar = view.findViewById(R.id.valuebar);
          mColorPicker = view.findViewById(R.id.colorPicker);
          if (mColorPicker != null) {
              mColorPicker.addSaturationBar(mSaturationBar);
              mColorPicker.addValueBar(mValueBar);
              mColorPicker.setOnColorChangedListener(this);
          }
  
          final Context context = getContext();
          if (context != null && kPersistValues) {
              SharedPreferences preferences = context.getSharedPreferences(kPreferences, Context.MODE_PRIVATE);
              mSelectedColor = preferences.getInt(kPreferences_color, kFirstTimeColor);
          } else {
              mSelectedColor = kFirstTimeColor;
          }
  
          mColorPicker.setOldCenterColor(mSelectedColor);
          mColorPicker.setColor(mSelectedColor);
          onColorChanged(mSelectedColor);
      }
  
      @Override
      public void onStop() {
  
          final Context context = getContext();
          // Preserve values
          if (context != null && kPersistValues) {
              SharedPreferences settings = context.getSharedPreferences(kPreferences, Context.MODE_PRIVATE);
              SharedPreferences.Editor editor = settings.edit();
              editor.putInt(kPreferences_color, mSelectedColor);
              editor.apply();
          }
  
          super.onStop();
      }
  
      @Override
      public void onAttach(@NonNull Context context) {
          super.onAttach(context);
          if (context instanceof NeopixelColorPickerFragment.NeopixelColorPickerFragmentListener) {
              mListener = (ControllerColorPickerFragmentListener) context;
          } else if (getTargetFragment() instanceof ControllerColorPickerFragmentListener) {
              mListener = (ControllerColorPickerFragmentListener) getTargetFragment();
          } else {
              throw new RuntimeException(context.toString() + " must implement NeopixelColorPickerFragmentListener");
          }
      }
  
      @Override
      public void onDetach() {
          super.onDetach();
          mListener = null;
      }
  
      @Override
      public void onCreateOptionsMenu(@NonNull Menu menu, @NonNull MenuInflater inflater) {
          super.onCreateOptionsMenu(menu, inflater);
          inflater.inflate(R.menu.menu_help, menu);
      }
  
      @Override
      public boolean onOptionsItemSelected(MenuItem item) {
          FragmentActivity activity = getActivity();
  
          switch (item.getItemId()) {
              case R.id.action_help:
                  if (activity != null) {
                      FragmentManager fragmentManager = activity.getSupportFragmentManager();
                      CommonHelpFragment helpFragment = CommonHelpFragment.newInstance(getString(R.string.colorpicker_help_title), getString(R.string.colorpicker_help_text));
                      FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction()
                              .replace(R.id.contentLayout, helpFragment, "Help");
                      fragmentTransaction.addToBackStack(null);
                      fragmentTransaction.commit();
                  }
                  return true;
  
              default:
                  return super.onOptionsItemSelected(item);
          }
      }
  
      // endregion
  
      // region OnColorChangedListener
  
      @SuppressWarnings("PointlessBitwiseExpression")
      @Override
      public void onColorChanged(int color) {
          // Save selected color
          mSelectedColor = color;
  
          // Update UI
          mRgbColorView.setBackgroundColor(color);
  
          final int r = (color >> 16) & 0xFF;
          final int g = (color >> 8) & 0xFF;
          final int b = (color >> 0) & 0xFF;
          final String text = String.format(getString(R.string.colorpicker_rgb_format), r, g, b);
          mRgbTextView.setText(text);
      }
  
  
      // endregion
  
      // region
      interface ControllerColorPickerFragmentListener {
          void onSendColorComponents(int color);
      }
  
      // endregion
  }
  