MainActivity

MainActivity

package com.example.motoharu.shoplist;

import android.app.*;
import android.content.Context;
import android.content.CursorLoader;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.Loader;
import android.database.Cursor;
import android.os.Bundle;
import android.view.ContextMenu;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;
import android.widget.Toast;


public class MyActivity extends ListActivity implements LoaderManager.LoaderCallbacks<Cursor> {
    private ListView lw;
    private EditText edtxt;
    private static EditText alertEd;
    private static DBhelper dbhelper;

    private SimpleCursorAdapter adapter;
    private static final int ACTIVITY_CREATE = 0;
    private static final int ACTIVITY_EDIT = 1;
    private Cursor cursor;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_my);
        dbhelper = new DBhelper(this);
        fillData();
        //layout elements
        lw = (ListView) findViewById(android.R.id.list);
        //edittext view for adding list items
        edtxt = (EditText) findViewById(R.id.editText);
        //edittext view for context menu edit dialog
        alertEd = (EditText) findViewById(R.id.alertEdit);



        registerForContextMenu(lw);
        getLoaderManager().initLoader(0, null, this);

        lw.setOnItemClickListener(new OnItemClickListener() {
            public void onItemClick(AdapterView<?> adapter, View v,
                                    int position, long id) {

                        addToGoodsList(id);
                   }
        });


        edtxt.setOnKeyListener(new View.OnKeyListener() {
            @Override
            public boolean onKey(View v, int keyCode, KeyEvent event) {

                if (event.getAction()== KeyEvent.ACTION_DOWN) {
                    if (keyCode == KeyEvent.KEYCODE_ENTER) {
                        String name = edtxt.getText().toString();
                        dbhelper.createTitlesValue(name);
                        getLoaderManager().getLoader(0).forceLoad();
                        adapter.notifyDataSetChanged();

                        if (edtxt.length() > 0) {
                            edtxt.getText().clear();
                        }
                        return true;
                    }
                }
               return false;
            }
        });

        }
    @Override
    protected void onDestroy()
    {
        super.onDestroy();
        dbhelper.close();
    }
    private void fillData() {
        cursor = dbhelper.getAllTitles();
        String[] from = new String[] { DBhelper.TITLES_NAME};
        int[] to = new int[] { R.id.title_name};
        // Теперь создадим адаптер массива и установим его для отображения наших
        // данных
        adapter = new SimpleCursorAdapter(this,
                R.layout.list_item_view, cursor, from, to, 0);
        setListAdapter(adapter);
        adapter.notifyDataSetChanged();
        cursor.close();
    }
    protected void onActivityResult(int requestCode, int resultCode,
                                   Intent intent) {
       super.onActivityResult(requestCode, resultCode, intent);

       if (resultCode == RESULT_OK) {
           return;
       }

   }

    private void addToGoodsList(long id) {
        Intent intent = new Intent(this, ItemsActivity.class);
        intent.putExtra(DBhelper.MAIN_ID, id);
        startActivityForResult(intent, ACTIVITY_CREATE);
        String idshow = DBhelper.MAIN_ID;
        Toast.makeText(this, idshow, Toast.LENGTH_SHORT).show();

    }
    public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo info){
        super.onCreateContextMenu(menu, v, info);
        getMenuInflater().inflate(R.menu.actions, menu);

    }
    public boolean onContextItemSelected(MenuItem item) {

       AdapterView.AdapterContextMenuInfo info = (AdapterView.AdapterContextMenuInfo) item.getMenuInfo();
       final long titleID = info.id;
        switch (item.getItemId()) {
            case R.id.cnt_mnu_delete:
                dbhelper.deleteData(info.id);
                getLoaderManager().getLoader(0).forceLoad();
                adapter.notifyDataSetChanged();
                return true;
            case R.id.cnt_mnu_edit:
                AlertDialog.Builder alert = new AlertDialog.Builder(this);
                // Set an EditText view to get user input
                final EditText input = new EditText(this);
                input.requestFocus();
                alert.setTitle("Edit");
                alert.setMessage("Change an item");
                alert.setView(input);
                Cursor c = dbhelper.readData();
                input.setText(c.getString(c.getColumnIndex(dbhelper.TITLES_NAME)));
                alert.setPositiveButton("Save", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int whichButton) {
                        String name = input.getText().toString();
                        dbhelper.updateTitlesValue(titleID, name);
                        getLoaderManager().getLoader(0).forceLoad();
                        adapter.notifyDataSetChanged();
                    }
                });
                alert.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int whichButton) {
                       dialog.cancel();
                    }
                });
               alert.show();
        }
        return super.onContextItemSelected(item);
    }
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.my, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

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

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

    @Override
    public void onLoaderReset(Loader<Cursor> loader) {
            adapter.swapCursor(null);
    }

    static class MyCursorLoader extends CursorLoader {
        DBhelper dBhelper;
        public MyCursorLoader(Context context, DBhelper dbcon) {
            super(context);
            this.dBhelper = dbcon;
        }
        public Cursor loadInBackground() {
            Cursor cursor = dbhelper.getAllData();
            return cursor;
        }


    }

}