Android Open Source - OpenHSK Create Word List Activity

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License

The source code is released under:

This work is licensed under a Creative Commons Attribution 3.0 Unported License. Original author of word lists: http://lingomi.com/ Original author of definitions: http://cc-cedict.org Original autho...

Java Source Code

package edu.openhsk;
// w ww  .  j  a v a 2s  .c o  m
import static edu.openhsk.repository.DatabaseMetadata.T_WORDS;

import java.io.IOException;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.LoaderManager.LoaderCallbacks;
import android.support.v4.content.Loader;
import android.util.Log;
import android.view.ContextMenu;
import android.view.ContextMenu.ContextMenuInfo;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.AdapterContextMenuInfo;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;
import android.widget.SimpleCursorAdapter.ViewBinder;
import android.widget.TextView;
import edu.openhsk.repository.DatabaseHelper;
import edu.openhsk.repository.SimpleCursorLoader;

public class CreateWordListActivity extends FragmentActivity implements LoaderCallbacks<Cursor> {
  private static final String LOG_TAG = CreateWordListActivity.class.getSimpleName();
  private static final int ADD_WORD_REQUEST_CODE = 1;

  protected static final String NEW_WORD_LIST_ID_EXTRA = "edu.openhsk.createwordlist.wordListId";
  protected static final String NEW_WORD_LIST_NAME_EXTRA = "edu.openhsk.createwordlist.wordListName";
  
  private ListView listView;
  private DatabaseHelper dbh;
  private SimpleCursorAdapter adapter;
  private ViewBinder viewBinder;
  private static int wordListId;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.create_word_list);
    
    Intent intent = getIntent();
    wordListId = intent.getIntExtra(NEW_WORD_LIST_ID_EXTRA, -1);
    setTitle(intent.getStringExtra(NEW_WORD_LIST_NAME_EXTRA));
    
    dbh = getDBHelper();
    
    listView = (ListView) findViewById(R.id.wordListListView);
    registerForContextMenu(listView);
    refreshList();
    
    getSupportLoaderManager().initLoader(1, null, this);
    
    View footerView = findViewById(R.id.wordListFooterButtonAddNewWord);
    footerView.setOnClickListener(new OnClickListener() {
      @Override
      public void onClick(View view) {
        Intent intent = new Intent(CreateWordListActivity.this, CreateWordActivity.class);
        startActivityForResult(intent, ADD_WORD_REQUEST_CODE);
      }
    });
    View footerView2 = findViewById(R.id.wordListFooterButtonSaveWordList);
    footerView2.setOnClickListener(new OnClickListener() {
      @Override
      public void onClick(View v) {
        startActivity(new Intent(CreateWordListActivity.this, WordListSelectionActivity.class));
      }
    });
    
    listView.setOnItemClickListener(new ListView.OnItemClickListener() {
      @Override
      public void onItemClick(AdapterView<?> parent, View view,
          int position, long id) {
        editWord((int)id);
      }
    });
  }
  
  @Override
  protected void onResume() {
    if (listView == null) {
      listView = (ListView) findViewById(R.id.wordListListView);
      refreshList();
    }
    super.onResume();
  }
  
  @Override
  protected void onNewIntent(Intent intent) {
    //unused
    super.onNewIntent(intent);
  }
  
  @Override
  protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == ADD_WORD_REQUEST_CODE && resultCode == Activity.RESULT_OK) {
      int wordId = data.getIntExtra(CreateWordActivity.EDITED_WORD_ID, -1);
      String hanzi = data.getStringExtra(CreateWordActivity.NEW_WORD_HANZI);
      String pinyin = data.getStringExtra(CreateWordActivity.NEW_WORD_PINYIN);
      String definition = data.getStringExtra(CreateWordActivity.NEW_WORD_DEFINITION);
      try {
        if (wordId != -1) {
          getDBHelper().editWord(wordId, hanzi, pinyin, definition, wordListId);
        } else {
          getDBHelper().addNewWord(hanzi, pinyin, definition, wordListId);
        }
        getSupportLoaderManager().restartLoader(1, null, this);
        Log.d(LOG_TAG, "Added " + hanzi + " to list " + wordListId);
      } catch (IOException e) {
        e.printStackTrace();
      }
    }
    
    super.onActivityResult(requestCode, resultCode, data);
  }

  private void refreshList() {
    TextView tv = new TextView(this);
    tv.setText(R.string.no_chars_found);
    listView.setEmptyView(tv);
    String[] from = new String[] {"word", "pinyin", "definition", "islearned"};
    int[] to = new int[] {R.id.charListView, R.id.pinyinListView, R.id.defListView};
    adapter = new SimpleCursorAdapter(this, R.layout.list_item, null, from, to);
    adapter.setViewBinder(viewBinder);
    listView.setAdapter(adapter);
  }

  private DatabaseHelper getDBHelper() {
    if (dbh == null) {
      dbh = new DatabaseHelper(this);
    }
    return dbh;
  }
  
  @Override
  public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
      super.onCreateContextMenu(menu, v, menuInfo);
      MenuInflater inflater = getMenuInflater();
      inflater.inflate(R.menu.word_context_menu, menu);
  }
  
  @Override
  public boolean onContextItemSelected(MenuItem item) {
    AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo();
      switch (item.getItemId()) {
          case R.id.deleteWordOptionsItem:
            getDBHelper().deleteWord(info.id);
            getSupportLoaderManager().restartLoader(1, null, this);
            return true;
          case R.id.editWordOptionsItem:
            editWord((int)info.id);
              return true;
          default:
              return super.onContextItemSelected(item);
      }
  }

  private void editWord(int id) {
    Intent intent = new Intent(CreateWordListActivity.this, CreateWordActivity.class);
    intent.putExtra(CreateWordActivity.ID_OF_WORD_TO_EDIT_EXTRA, id);
    startActivityForResult(intent, ADD_WORD_REQUEST_CODE);
  }

  @Override
  public Loader<Cursor> onCreateLoader(int id, Bundle args) {
    return new WordCursorLoader(this, getDBHelper());
  }

  @Override
  public void onLoadFinished(Loader<Cursor> loader, Cursor cursor) {
    adapter.changeCursor(cursor);
  }

  @Override
  public void onLoaderReset(Loader<Cursor> loader) {
    adapter.changeCursor(null);
  }
  
  @Override
  protected void onDestroy() {
    DatabaseHelper.closeDatabase(getDBHelper().getReadableDatabase());
    super.onDestroy();
  }
  
  public static final class WordCursorLoader extends SimpleCursorLoader {
    private static final String[] queryColumns = new String[] {"_id", "word", "pinyin", "definition", "islearned"};
    private final DatabaseHelper dbh;

    public WordCursorLoader(Context context, DatabaseHelper dbh) {
      super(context);
      this.dbh = dbh;
    }

    @Override
    public Cursor loadInBackground() {
      return dbh.getReadableDatabase().query(T_WORDS, queryColumns, "wordlistid = ?", 
          new String[] {String.valueOf(wordListId)}, "", "", "");
    }
  }
}

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