期末作业基于安卓系统开发的单词记录和背诵APP源码.zip

package com.esdut.ciremember; import android.app.AlertDialog; import android.content.Context; import android.content.DialogInterface; import android.content.SharedPreferences; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.drawable.ColorDrawable; import android.graphics.drawable.Drawable; import android.os.Bundle; import androidx.annotation.NonNull; import androidx.annotation.Nullable; import androidx.core.content.ContextCompat; import androidx.fragment.app.Fragment; import androidx.lifecycle.LiveData; import androidx.lifecycle.Observer; import androidx.lifecycle.ViewModelProvider; import androidx.navigation.NavController; import androidx.navigation.Navigation; import androidx.recyclerview.widget.DefaultItemAnimator; import androidx.recyclerview.widget.DividerItemDecoration; import androidx.recyclerview.widget.ItemTouchHelper; import androidx.recyclerview.widget.LinearLayoutManager; import androidx.recyclerview.widget.RecyclerView; import android.util.Log; 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.view.inputmethod.InputMethodManager; import android.widget.SearchView; import android.widget.TextView; import com.google.android.material.floatingactionbutton.FloatingActionButton; import com.google.android.material.snackbar.Snackbar; import java.util.List; public class WordsFragment extends Fragment { private WordViewModel wordViewModel; private RecyclerView recyclerView; private MyAdapter myAdapter1, myAdapter2; private FloatingActionButton floatingActionButton; private LiveData<List<Word>> filteredWords; private static final String VIEW_TYPE_SHP = "view_type_shp"; private static final String IS_USING_CARD_VIEW = "is_using_card_view"; private List<Word> allWords; private boolean undoAction; private DividerItemDecoration dividerItemDecoration; private TextView view; public WordsFragment() { // Required empty public constructor setHasOptionsMenu(true); } @Override public boolean onOptionsItemSelected(@NonNull MenuItem item) { switch (item.getItemId()) { case R.id.clearData: AlertDialog.Builder builder = new AlertDialog.Builder(requireActivity()); builder.setTitle("清空数据"); builder.setPositiveButton("确定", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { wordViewModel.clearWords(); } }); builder.setNegativeButton("取消", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { } }); builder.create(); builder.show(); break; case R.id.switchViewType: SharedPreferences shp = requireActivity().getSharedPreferences(VIEW_TYPE_SHP, Context.MODE_PRIVATE); boolean viewType = shp.getBoolean(IS_USING_CARD_VIEW, false); SharedPreferences.Editor editor = shp.edit(); if (viewType) { recyclerView.setAdapter(myAdapter1); recyclerView.addItemDecoration(dividerItemDecoration); editor.putBoolean(IS_USING_CARD_VIEW, false); } else { recyclerView.setAdapter(myAdapter2); recyclerView.removeItemDecoration(dividerItemDecoration); editor.putBoolean(IS_USING_CARD_VIEW, true); } editor.apply(); break; case R.id.exit: requireActivity().finish(); } return super.onOptionsItemSelected(item); } @Override public void onCreateOptionsMenu(@NonNull Menu menu, @NonNull MenuInflater inflater) { super.onCreateOptionsMenu(menu, inflater); inflater.inflate(R.menu.main_menu, menu); SearchView searchView = (SearchView) menu.findItem(R.id.app_bar_search).getActionView(); searchView.setMaxWidth(500); searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() { @Override public boolean onQueryTextSubmit(String query) { return false; } @Override public boolean onQueryTextChange(String newText) { String patten = newText.trim(); //移除！ 原有的观察 filteredWords.removeObservers(getViewLifecycleOwner()); filteredWords = wordViewModel.findWordsWithPatten(patten); filteredWords.observe(getViewLifecycleOwner(), new Observer<List<Word>>() { @Override public void onChanged(List<Word> words) { int temp = myAdapter1.getItemCount(); allWords = words; // myAdapter1.setAllWords(words); // myAdapter2.setAllWords(words); if (temp != words.size()) { // myAdapter1.notifyDataSetChanged(); // myAdapter2.notifyDataSetChanged(); myAdapter1.submitList(words); myAdapter2.submitList(words); } } }); return true; } }); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // Inflate the layout for this fragment return inflater.inflate(R.layout.fragment_words, container, false); } @Override public void onActivityCreated(@Nullable Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); wordViewModel = new ViewModelProvider(this).get(WordViewModel.class); recyclerView = requireActivity().findViewById(R.id.WordsFragmentView); recyclerView.setLayoutManager(new LinearLayoutManager(requireActivity())); myAdapter1 = new MyAdapter(false, wordViewModel); myAdapter2 = new MyAdapter(true, wordViewModel); recyclerView.setItemAnimator(new DefaultItemAnimator() { @Override public void onAnimationFinished(@NonNull RecyclerView.ViewHolder viewHolder) { super.onAnimationFinished(viewHolder); LinearLayoutManager linearLayoutManager = (LinearLayoutManager) recyclerView.getLayoutManager(); if (linearLayoutManager != null) { int firstPostion = linearLayoutManager.findFirstVisibleItemPosition(); int lastPositon = linearLayoutManager.findLastVisibleItemPosition(); for (int i = firstPostion; i <= lastPositon; i++) { MyAdapter.MyViewHolder holder = (MyAdapter.MyViewHolder) recyclerView.findViewHolderForAdapterPosition(i); if (holder != null) { holder.textViewNumber.setText(String.valueOf(i + 1)); } } } } }); /// /// 读取SHP /////////////////////////////////////////////////////////////////////////////////////////////////////// SharedPreferences shp = requireActivity().getSharedPreferences(VIEW_TYPE_SHP, Context.MODE_PRIVATE); boolean viewType = shp.getBoolean(IS_USING_CARD_VIEW, false); //SharedPreferences.Editor editor = shp.edit(); /////////////////////////////////////////////////////////////////////////////////////////////////////////