Android Open Source - Note Note Activity

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License

The source code is released under:

MIT License

Java Source Code

package com.bq.note;
/*from  w  ww  .j  a  va2  s  . co m*/
import java.util.HashSet;

import org.bq.app.NoteApplication;
import org.bq.db.Note;
import org.bq.db.NoteDao;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.ActionMode;
import android.view.HapticFeedbackConstants;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MenuItem.OnMenuItemClickListener;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AdapterView.OnItemLongClickListener;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Toast;

public class NoteActivity extends Activity {
  // private static final String TAG = "NoteActivity";
  private SQLiteDatabase db;

  private ListView noteListView;
  private ModeCallback mModeCallBack;
  private NoteDao noteDao;
  private Cursor cursor;
  private Button newNote;
  private NoteAdapter adapter;
  private String textColumn = NoteDao.Properties.Text.columnName;
  private String ORDER_BY = textColumn + " COLLATE LOCALIZED ASC";

  @SuppressLint("InflateParams")
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    noteDao = NoteApplication.daoSession.getNoteDao();
    db = NoteApplication.getDB();
    noteListView = (ListView) findViewById(R.id.notes_list);
    newNote = (Button) findViewById(R.id.btn_new_note);
    newNote.setOnClickListener(new NewNoteOnClickListener());
    cursor = db.query(noteDao.getTablename(), noteDao.getAllColumns(),
        null, null, null, null, ORDER_BY);
    noteListView.addFooterView(
        LayoutInflater.from(this).inflate(R.layout.note_list_footer,
            null), null, false);
    adapter = new NoteAdapter(this, cursor, true);
    noteListView.setAdapter(adapter);
    noteListView.setOnItemClickListener(new OnMyItemClickListener());
    noteListView
        .setOnItemLongClickListener(new OnMyItemLongClickListener());
    mModeCallBack = new ModeCallback();
  }

  @Override
  protected void onResume() {
    super.onResume();
    cursor.requery();
  }

  @Override
  public void onContextMenuClosed(Menu menu) {
    if (noteListView != null) {
      noteListView.setOnCreateContextMenuListener(null);
    }
    super.onContextMenuClosed(menu);
  }

  class ModeCallback implements ListView.MultiChoiceModeListener,
      OnMenuItemClickListener {
    private ActionMode mActionMode;

    @Override
    public boolean onActionItemClicked(ActionMode mode, MenuItem item) {

      return false;
    }

    @Override
    public boolean onCreateActionMode(ActionMode mode, Menu menu) {
      getMenuInflater().inflate(R.menu.note_list_options, menu);
      menu.findItem(R.id.delete).setOnMenuItemClickListener(this);

      mActionMode = mode;
      adapter.setChoiceMode(true);
      noteListView.setLongClickable(false);
      newNote.setVisibility(View.GONE);
      return true;
    }

    public void finishActionMode() {
      mActionMode.finish();
    }

    @Override
    public void onDestroyActionMode(ActionMode mode) {
      adapter.setChoiceMode(false);
      noteListView.setLongClickable(true);
      newNote.setVisibility(View.VISIBLE);
    }

    @Override
    public boolean onPrepareActionMode(ActionMode mode, Menu menu) {

      return false;
    }

    @Override
    public boolean onMenuItemClick(MenuItem item) {
      if (adapter.getSelectedCount() == 0) {
        Toast.makeText(NoteActivity.this,
            getString(R.string.menu_select_none),
            Toast.LENGTH_SHORT).show();
        return true;
      }
      AlertDialog.Builder builder = new AlertDialog.Builder(
          NoteActivity.this);
      builder.setTitle(getString(R.string.alert_title_delete));
      builder.setIcon(android.R.drawable.ic_dialog_alert);
      builder.setMessage(getString(R.string.alert_message_delete_notes,
          adapter.getSelectedCount()));
      builder.setPositiveButton(android.R.string.ok,
          new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int which) {
              batchDelete();
            }
          });
      builder.setNegativeButton(android.R.string.cancel, null);
      builder.show();
      return false;
    }

    @Override
    public void onItemCheckedStateChanged(ActionMode mode, int position,
        long id, boolean checked) {
      adapter.setCheckedItem(position, checked);
    }

  }

  private void batchDelete() {
    new AsyncTask<Integer, Integer, Integer>() {
      protected Integer doInBackground(Integer... params) {
        HashSet<Long> ids = adapter.getSelectedItemIds();
        noteDao.deleteByKeyInTx(ids);
        return ids.size();
      }

      @Override
      protected void onPostExecute(Integer i) {
        cursor = db.query(noteDao.getTablename(),
            noteDao.getAllColumns(), null, null, null, null,
            ORDER_BY);
        adapter.changeCursor(cursor);
        mModeCallBack.finishActionMode();
      }
    }.execute();
  }

  class NewNoteOnClickListener implements OnClickListener {

    @Override
    public void onClick(View v) {
      Intent intent = new Intent(NoteActivity.this,
          NoteEditActivity.class);
      intent.putExtra(Intent.EXTRA_UID, 0);
      startActivity(intent);
    }

  }

  class OnMyItemClickListener implements OnItemClickListener {

    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position,
        long id) {
      if (adapter.isInChoiceMode()) {
        position = position - noteListView.getHeaderViewsCount();
        mModeCallBack.onItemCheckedStateChanged(null, position, id,
            !adapter.isSelectedItem(position));
      } else {
        Note item = ((NotesListItem) view).getItemData();
        Intent intent = new Intent(NoteActivity.this,
            NoteEditActivity.class);
        intent.putExtra(Intent.EXTRA_UID, item.getId());
        startActivity(intent);
      }
      return;
    }

  }

  class OnMyItemLongClickListener implements OnItemLongClickListener {

    @Override
    public boolean onItemLongClick(AdapterView<?> parent, View view,
        int position, long id) {
      if (view instanceof NotesListItem) {
        position = position - noteListView.getHeaderViewsCount();
        if (noteListView.startActionMode(mModeCallBack) != null) {
          mModeCallBack.onItemCheckedStateChanged(null, position, id,
              !adapter.isSelectedItem(position));
          noteListView
              .performHapticFeedback(HapticFeedbackConstants.LONG_PRESS);
        }
        return true;
      }
      return false;
    }
  }

}

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