Java tutorial
/* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you 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. */ package org.apache.taverna.mobile.ui.workflow; import android.app.SearchManager; import android.content.Context; import android.content.Intent; import android.os.Bundle; import android.support.design.widget.Snackbar; import android.support.v4.app.Fragment; import android.support.v4.widget.SwipeRefreshLayout; import android.support.v7.widget.DefaultItemAnimator; import android.support.v7.widget.LinearLayoutManager; import android.support.v7.widget.RecyclerView; import android.support.v7.widget.SearchView; import android.text.TextUtils; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ProgressBar; import android.widget.Toast; import org.apache.taverna.mobile.R; import org.apache.taverna.mobile.data.DataManager; import org.apache.taverna.mobile.data.model.Workflow; import org.apache.taverna.mobile.data.model.Workflows; import org.apache.taverna.mobile.ui.adapter.EndlessRecyclerOnScrollListener; import org.apache.taverna.mobile.ui.adapter.RecyclerItemClickListner; import org.apache.taverna.mobile.ui.adapter.WorkflowAdapter; import org.apache.taverna.mobile.ui.workflowdetail.WorkflowDetailActivity; import org.apache.taverna.mobile.utils.ConnectionInfo; import org.apache.taverna.mobile.utils.Constants; import org.apache.taverna.mobile.utils.ScrollChildSwipeRefreshLayout; import java.util.ArrayList; import java.util.List; import butterknife.BindView; import butterknife.ButterKnife; public class WorkflowFragment extends Fragment implements WorkflowMvpView, RecyclerItemClickListner.OnItemClickListener, SwipeRefreshLayout.OnRefreshListener, SearchView.OnQueryTextListener, SearchView.OnCloseListener { public final String LOG_TAG = getClass().getSimpleName(); @BindView(R.id.rv_workflows) RecyclerView mRecyclerView; @BindView(R.id.progress_circular) ProgressBar mProgressBar; @BindView(R.id.swipe_refresh) ScrollChildSwipeRefreshLayout mSwipeRefresh; private WorkflowPresenter mWorkflowPresenter; private WorkflowAdapter mWorkflowAdapter; private WorkflowAdapter mSearchWorkflowAdapter; private int mPageNumber = 1; private List<Workflow> mWorkflowList; private SearchView searchView; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); mWorkflowList = new ArrayList<>(); DataManager dataManager = new DataManager(); mWorkflowPresenter = new WorkflowPresenter(dataManager); setHasOptionsMenu(true); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.fragment_dashboard, container, false); ButterKnife.bind(this, rootView); mWorkflowPresenter.attachView(this); final LinearLayoutManager layoutManager = new LinearLayoutManager(getActivity()); mRecyclerView.setLayoutManager(layoutManager); mRecyclerView.setItemAnimator(new DefaultItemAnimator()); mRecyclerView.hasFixedSize(); mWorkflowAdapter = new WorkflowAdapter(mWorkflowList, getActivity()); mRecyclerView.setAdapter(mWorkflowAdapter); mRecyclerView.addOnItemTouchListener(new RecyclerItemClickListner(getActivity(), this)); mWorkflowPresenter.loadAllWorkflow(mPageNumber); mRecyclerView.addOnScrollListener(new EndlessRecyclerOnScrollListener(layoutManager) { @Override public void onLoadMore(int current_page) { if (ConnectionInfo.isConnectingToInternet(getContext()) && mWorkflowList.size() % 10 == 0) { addLoadMoreProgressbar(); ++mPageNumber; mWorkflowPresenter.loadAllWorkflow(mPageNumber); } else if (!ConnectionInfo.isConnectingToInternet(getContext())) { showSnackBar(R.string.no_internet_connection); } } }); mSwipeRefresh.setColorSchemeColors(getActivity().getResources().getIntArray(R.array.swipeRefreshColors)); mSwipeRefresh.setOnRefreshListener(this); return rootView; } @Override public void onRefresh() { if (ConnectionInfo.isConnectingToInternet(getContext())) { mPageNumber = 1; mWorkflowPresenter.loadAllWorkflow(mPageNumber); mSwipeRefresh.setRefreshing(true); } else { showSnackBar(R.string.no_internet_connection); if (mSwipeRefresh.isRefreshing()) { mSwipeRefresh.setRefreshing(false); } } } @Override public void showProgressbar(boolean show) { if (show && mWorkflowAdapter.getItemCount() == 0) { mProgressBar.setVisibility(View.VISIBLE); } else { mProgressBar.setVisibility(View.GONE); } } @Override public void showSnackBar(int message) { final Snackbar snackbar = Snackbar.make(mRecyclerView, getActivity().getString(message), Snackbar.LENGTH_INDEFINITE); snackbar.setAction(getActivity().getString(R.string.ok), new View.OnClickListener() { @Override public void onClick(View view) { snackbar.dismiss(); } }); snackbar.show(); } @Override public void showWorkflows(Workflows workflows) { if (mPageNumber == 1) { mSwipeRefresh.setRefreshing(false); mWorkflowList.clear(); } mWorkflowList.addAll(workflows.getWorkflowList()); mWorkflowAdapter.notifyDataSetChanged(); } @Override public void removeLoadMoreProgressbar() { if (mPageNumber != 1) { mWorkflowList.remove(mWorkflowList.size() - 1); mWorkflowAdapter.notifyDataSetChanged(); } } @Override public void addLoadMoreProgressbar() { mWorkflowList.add(null); mWorkflowAdapter.notifyItemInserted(mWorkflowList.size()); } @Override public void onDestroyView() { super.onDestroyView(); mWorkflowPresenter.detachView(); } @Override public void onItemClick(View childView, int position) { if (searchView.isIconified() || TextUtils.isEmpty(searchView.getQuery())) { if (mWorkflowAdapter.getItem(position) != null && position != -1) { Intent intent = new Intent(getActivity(), WorkflowDetailActivity.class); intent.putExtra(Constants.WORKFLOW_ID, mWorkflowAdapter.getItem(position).getId()); intent.putExtra(Constants.WORKFLOW_TITLE, mWorkflowAdapter.getItem(position).getTitle()); startActivity(intent); } } else { if (mSearchWorkflowAdapter.getItem(position) != null && position != -1) { Intent intent = new Intent(getActivity(), WorkflowDetailActivity.class); intent.putExtra(Constants.WORKFLOW_ID, mSearchWorkflowAdapter.getItem(position).getId()); intent.putExtra(Constants.WORKFLOW_TITLE, mSearchWorkflowAdapter.getItem(position).getTitle()); startActivity(intent); } } } @Override public void onItemLongPress(View childView, int position) { } @Override public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { super.onCreateOptionsMenu(menu, inflater); SearchManager searchManager = (SearchManager) getActivity().getSystemService(Context.SEARCH_SERVICE); searchView = (SearchView) menu.findItem(R.id.action_search).getActionView(); searchView.setSearchableInfo(searchManager.getSearchableInfo(getActivity().getComponentName())); searchView.setSubmitButtonEnabled(false); searchView.setOnQueryTextListener(this); searchView.setOnCloseListener(this); } private void performSearch(String search) { mSearchWorkflowAdapter = new WorkflowAdapter(new ArrayList<Workflow>(), getContext()); WorkflowAdapter wk = mWorkflowAdapter; if (!TextUtils.isEmpty(search)) { if (null != wk) for (int i = 0; i < wk.getItemCount(); i++) { Workflow workflow = wk.getItem(i); if (workflow.getTitle().toLowerCase().contains(search.toLowerCase())) { mSearchWorkflowAdapter.addWorkflow(workflow); } } mRecyclerView.swapAdapter(mSearchWorkflowAdapter, true); if (mSearchWorkflowAdapter.getItemCount() == 0) Toast.makeText(getActivity(), getString(R.string.msg_no_workflow_found), Toast.LENGTH_SHORT).show(); } else { mRecyclerView.swapAdapter(mWorkflowAdapter, true); } } @Override public boolean onQueryTextSubmit(String query) { performSearch(query); searchView.clearFocus(); return true; } @Override public boolean onQueryTextChange(String newText) { performSearch(newText); return true; } @Override public boolean onClose() { mRecyclerView.swapAdapter(mWorkflowAdapter, true); return true; } }