Android Open Source - checkin Check In List

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License

The source code is released under:

# License Copyright ? 2014 Sam Whited Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the ?Software??), to deal ...

Java Source Code

package com.samwhited.checkin;
// w  w w.  j  a  va  2s .c  om
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.CursorAdapter;
import android.widget.SimpleCursorAdapter;

import com.samwhited.checkin.database.CheckInDB;
import com.samwhited.checkin.database.CheckInOpenHelper;
import com.samwhited.checkin.util.NetworkUtils;


public class CheckInList extends Activity
    implements CheckInListFragment.OnListInteractionListener {

  private CheckInListFragment fragment;

  public CheckInList() {
    // Empty constructor.
  }

  /**
   * A handler to use for long running tasks that shouldn't block the UI thread (uploads).
   */
  private CheckInHandler mHandler;

  /**
   * The database to use for storing checkins.
   */
  private CheckInDB db;

    @Override
    protected void onCreate(final Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_check_in_list);

    db = new CheckInDB(this);
    mHandler = new CheckInHandler(this);

    fragment = new CheckInListFragment();
    fragment.setListAdapter(new CheckInListAdapter(this,
        android.R.layout.simple_list_item_1,
        db.selectRecords(),
        new String[]{CheckInOpenHelper.ID_NAME},
        new int[]{android.R.id.text1},
        CursorAdapter.FLAG_REGISTER_CONTENT_OBSERVER
    ));
        if (savedInstanceState == null) {
            getFragmentManager().beginTransaction()
                    .add(R.id.container, fragment)
          .addToBackStack(null)
          .commit();
        }
    }


    @Override
    public boolean onCreateOptionsMenu(final Menu menu) {
        
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.check_in_list, menu);
        return true;
    }

  @Override
  public boolean onOptionsItemSelected(final 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.
    switch (item.getItemId()) {
      case R.id.action_settings:
        startActivity(new Intent(this, SettingsActivity.class));
        return true;
      case R.id.action_discard:
        handleDiscard();
        return true;
      case R.id.action_upload:
        handleUpload();
        return true;
    }
    return super.onOptionsItemSelected(item);
  }

  private void handleDiscard() {
    final AlertDialog.Builder alertDialog = new AlertDialog.Builder(CheckInList.this);
    alertDialog.setTitle(R.string.title_discard_all_checkins);
    alertDialog.setMessage(R.string.confirm_discard_all_checkins);
    alertDialog.setPositiveButton(R.string.delete, new DialogInterface.OnClickListener() {
      public void onClick(final DialogInterface dialogInterface, final int arg1) {
        new AsyncTask<Void, Void, Void>() {
          @Override
          protected Void doInBackground(Void... params) {
            db.deleteAllRecords();
            return null;
          }
          @Override
          protected void onPostExecute(Void result) {
            notifyDatasetChanged();
            if (fragment.getLoaderManager() != null) {
              fragment.getLoaderManager().restartLoader(0, null, fragment);
            }
          }
        }.execute();
      }
    });
    alertDialog.setNegativeButton(android.R.string.cancel, null);
    alertDialog.show();
  }

  private void handleUpload() {
    NetworkUtils.uploadCheckIns(db, mHandler);
    notifyDatasetChanged();
  }

  private void notifyDatasetChanged() {
    if (fragment.getListAdapter() != null) {
      ((CheckInListAdapter) fragment.getListAdapter()).notifyDataSetChanged();
    }
  }

  /**
   * Fires when the list fragment is interacted with.
   * @param id The id of the list element which was clicked.
   */
  @Override
  public void onListInteraction(final long id) {
    // TODO: Show a map view?
  }
}

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