Java tutorial
/* * Copyright 2014 WNCOutdoors.info * * 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. * * SearchHikeFragment.java * Fragment which controls the Hike search tab, which allows users to * find waterfalls based on parameters of the hike it takes to get to them. */ package info.wncwaterfalls.app; import android.app.Activity; import android.os.Bundle; import android.support.v4.app.Fragment; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.ArrayAdapter; import android.widget.Button; import android.widget.CheckBox; import android.widget.Spinner; import info.wncwaterfalls.app.R; public class SearchHikeFragment extends Fragment implements OnClickListener { private final String TAG = "SearchHikeFragment"; OnHikeSearchListener sListener; private Spinner trailLengthSpinner; private Spinner trailDifficultySpinner; private Spinner trailClimbSpinner; // Interface for listening to our searches public interface OnHikeSearchListener { public void onHikeSearch(boolean onlyShared, short trailLength, short trailDifficulty, short trailClimb); } @Override public void onAttach(Activity activity) { super.onAttach(activity); // Make sure the containing activity implements the search listener interface try { sListener = (OnHikeSearchListener) activity; } catch (ClassCastException e) { throw new ClassCastException(activity.toString() + " must implement OnHikeSearchListener"); } } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View hikeSearchFragmentView = inflater.inflate(R.layout.fragment_hike_search, container, false); setupSpinners(hikeSearchFragmentView); // Up-set the Find button. Button b = (Button) hikeSearchFragmentView.findViewById(R.id.search_hike_find_button); b.setOnClickListener(this); return hikeSearchFragmentView; } // Set up the spinners on this fragment with their drop-down items private void setupSpinners(View view) { // Trail Length spinner trailLengthSpinner = (Spinner) view.findViewById(R.id.search_hike_trail_length_spinner); ArrayAdapter<CharSequence> trailLengthAdapter = ArrayAdapter.createFromResource(getActivity(), R.array.hike_trail_length_labels, android.R.layout.simple_spinner_item); trailLengthAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); trailLengthSpinner.setAdapter(trailLengthAdapter); // Trail Difficulty spinner trailDifficultySpinner = (Spinner) view.findViewById(R.id.search_hike_trail_difficulty_spinner); ArrayAdapter<CharSequence> trailDifficultyAdapter = ArrayAdapter.createFromResource(getActivity(), R.array.hike_trail_difficulty_labels, android.R.layout.simple_spinner_item); trailDifficultyAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); trailDifficultySpinner.setAdapter(trailDifficultyAdapter); // Trail Climb spinner trailClimbSpinner = (Spinner) view.findViewById(R.id.search_hike_trail_climb_spinner); ArrayAdapter<CharSequence> trailClimbingAdapter = ArrayAdapter.createFromResource(getActivity(), R.array.hike_trail_climb_labels, android.R.layout.simple_spinner_item); trailClimbingAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); trailClimbSpinner.setAdapter(trailClimbingAdapter); } public void performHikeSearch() { // Get the value of the selected items in the various spinners. Spinner trailLengthSpinner = (Spinner) getView().findViewById(R.id.search_hike_trail_length_spinner); short lengthSelected = (short) getResources() .getIntArray(R.array.hike_trail_length_values)[trailLengthSpinner.getSelectedItemPosition()]; Spinner trailDifficultySpinner = (Spinner) getView() .findViewById(R.id.search_hike_trail_difficulty_spinner); short difficultySelected = (short) getResources().getIntArray( R.array.hike_trail_difficulty_values)[trailDifficultySpinner.getSelectedItemPosition()]; Spinner trailClimbSpinner = (Spinner) getView().findViewById(R.id.search_hike_trail_climb_spinner); short climbSelected = (short) getResources().getIntArray(R.array.hike_trail_climb_values)[trailClimbSpinner .getSelectedItemPosition()]; // Get the state of the "Only falls I've Shared" checkbox CheckBox searchTrailSharedCheckbox = (CheckBox) getView().findViewById(R.id.search_hike_shared_checkbox); boolean isChecked = searchTrailSharedCheckbox.isChecked(); // Call the search listener on parent activity sListener.onHikeSearch(isChecked, lengthSelected, difficultySelected, climbSelected); } @Override public void onClick(View button) { int buttonId = button.getId(); if (buttonId == R.id.search_hike_find_button) { performHikeSearch(); } } }