Java tutorial
/** * Copyright 2016 Lloyd Torres * * 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. */ package com.lloydtorres.stately.telegrams; import android.app.Dialog; import android.os.Build; import android.os.Bundle; import android.support.v4.app.DialogFragment; import android.support.v7.app.AppCompatDialog; import android.support.v7.widget.LinearLayoutManager; import android.support.v7.widget.RecyclerView; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import com.lloydtorres.stately.R; import com.lloydtorres.stately.dto.TelegramFolder; import java.util.ArrayList; /** * Created by Lloyd on 2016-03-11. * A dialog showing the available telegram folders. */ public class FoldersDialog extends DialogFragment { public static final String DIALOG_TAG = "fragment_folder_dialog"; public static final String FOLDERS_KEY = "folders"; public static final String SELECTED_KEY = "selected"; // RecyclerView variables private RecyclerView mRecyclerView; private RecyclerView.LayoutManager mLayoutManager; private RecyclerView.Adapter mRecyclerAdapter; private ArrayList<TelegramFolder> folders; private int selected; public void setFolders(ArrayList<TelegramFolder> f) { folders = f; } public void setSelected(int s) { selected = s; } @Override public Dialog onCreateDialog(Bundle savedInstanceState) { AppCompatDialog dialog = null; if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { dialog = new AppCompatDialog(getActivity(), R.style.AlertDialogCustom); } else { dialog = new AppCompatDialog(getActivity(), R.style.MaterialDialog); } dialog.setCanceledOnTouchOutside(true); return dialog; } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.fragment_dialog_recycler, container, false); // Restore saved state if (savedInstanceState != null) { folders = savedInstanceState.getParcelableArrayList(FOLDERS_KEY); selected = savedInstanceState.getInt(SELECTED_KEY); } getDialog().setTitle(getString(R.string.telegrams_folders)); initRecycler(view); return view; } private void initRecycler(View view) { mRecyclerView = (RecyclerView) view.findViewById(R.id.recycler_padded); mRecyclerView.setHasFixedSize(true); mLayoutManager = new LinearLayoutManager(getContext()); mRecyclerView.setLayoutManager(mLayoutManager); mRecyclerAdapter = new FoldersRecyclerAdapter(getParentFragment(), this, folders, selected); mRecyclerView.setAdapter(mRecyclerAdapter); } @Override public void onSaveInstanceState(Bundle outState) { // Save state super.onSaveInstanceState(outState); outState.putParcelableArrayList(FOLDERS_KEY, folders); outState.putInt(SELECTED_KEY, selected); } }