Android Open Source - gonzomemory Gonzonotes Android Presenter

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License

The source code is released under:
Apache License
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Java Source Code

package de.janpeuker.apps.gonzonotes.mvp;
//from   w  w  w . j av  a  2 s.  com
import android.annotation.SuppressLint;
import android.app.LoaderManager;
import android.content.Context;
import android.content.CursorLoader;
import android.content.Loader;
import android.database.Cursor;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CursorAdapter;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.SimpleCursorAdapter;
import android.widget.TextView;

import com.parse.ParseException;
import com.parse.SaveCallback;

import de.janpeuker.apps.gonzonotes.Constants;
import de.janpeuker.apps.gonzonotes.GonzonotesActivity;
import de.janpeuker.apps.gonzonotes.ParseTransfer;
import de.janpeuker.apps.gonzonotes.R;
import de.janpeuker.apps.gonzonotes.provider.NotesContract;

@SuppressLint("NewApi")
public class GonzonotesAndroidPresenter extends SaveCallback implements GonzonotesPresenter, LoaderManager.LoaderCallbacks<Cursor> {

  private static final String SHOW_READABLE_KEY = "ShowReadable";

  private final Context context;
  private final GonzonotesActivity activity;
  private SimpleCursorAdapter adapter;

  private final GonzonotesViewModel model;

  private static GonzonotesAndroidPresenter instance;

  public static GonzonotesAndroidPresenter getInstance(final GonzonotesActivity activity) {
    instance = new GonzonotesAndroidPresenter(activity);
    return instance;
  }

  private GonzonotesAndroidPresenter(final GonzonotesActivity activity) {
    this.activity = activity;
    context = activity.getBaseContext();
    model = new SharedPreferencesBasedGonzonotesViewModel(context);
  }

  @Override
  public void createView(final Bundle savedInstanceState) {
    final Button button = (Button) activity.findViewById(R.id.buttonStart);
    button.setOnClickListener(new OnClickListener() {

      @Override
      public void onClick(final View view) {

        startTransfer();

      }

    });

    boolean checked = false;

    if ((savedInstanceState != null) && (savedInstanceState.containsKey(SHOW_READABLE_KEY))) {
      checked = savedInstanceState.getBoolean(SHOW_READABLE_KEY);
    }

    ((CheckBox) activity.findViewById(R.id.checkBoxReadable)).setChecked(checked);

    createLoaderAdapter();
  }

  @Override
  public void resumeView() {

    Log.d(Constants.TAG, "Presenter in resumeView");

    model.loadState(context);

    final TextView it = (TextView) activity.findViewById(R.id.textInput);
    it.setText(model.getLastEnteredText());

    activity.getLoaderManager().restartLoader(0, null, this);
  }

  @Override
  public void pauseView() {
    model.persistState(context);
  }

  @Override
  public void startTransfer() {

    final CharSequence lastEnteredText = ((TextView) activity.findViewById(R.id.textInput)).getText();

    model.setLastEnteredText(lastEnteredText.toString());

    final ProgressBar pb = (ProgressBar) activity.findViewById(R.id.progressBarTransfer);
    pb.setIndeterminate(true);
    pb.setVisibility(View.VISIBLE);

    ParseTransfer.storeObject(model, this);

  }

  @Override
  public void storeInstanceState(final Bundle storeBundle) {
    model.persistState(context);
    // Store state the model does not persist itself
    final CheckBox checkBox = (CheckBox) activity.findViewById(R.id.checkBoxReadable);
    storeBundle.putBoolean(SHOW_READABLE_KEY, checkBox.isChecked());
  }

  @Override
  public void done(final ParseException e) {
    final ProgressBar pb = (ProgressBar) activity.findViewById(R.id.progressBarTransfer);

    pb.setVisibility(View.INVISIBLE);

    final TextView ot = (TextView) activity.findViewById(R.id.textOutput);

    if (e == null) {
      ot.setText("Finish");
      // Reload List from Server
      activity.getLoaderManager().restartLoader(0, null, this);

    } else {
      if (((CheckBox) activity.findViewById(R.id.checkBoxReadable)).isChecked()) {
        ot.setText("Error");
      } else {
        ot.setText(e.getMessage());
      }
      Log.w(Constants.TAG, "Error in Parse done", e);
    }

  }

  public void createLoaderAdapter() {

    activity.getLoaderManager().initLoader(0, null, this);

    adapter = new SimpleCursorAdapter(context, R.layout.noteslistitem, null, new String[] { NotesContract.KEY_NOTE_ID,
        NotesContract.KEY_NOTE_CONTENT_TEXT }, new int[] { R.id.textNoteKey, R.id.textNoteContent },
        CursorAdapter.FLAG_REGISTER_CONTENT_OBSERVER);

    // Bind to our new adapter.
    final ListView lv = (ListView) activity.findViewById(R.id.listOfNotes);
    lv.setAdapter(adapter);

  }

  // Creates a new loader after the initLoader () call
  @Override
  public Loader<Cursor> onCreateLoader(final int id, final Bundle args) {
    final String[] projection = { NotesContract.KEY_ID, NotesContract.KEY_NOTE_ID, NotesContract.KEY_NOTE_CONTENT_TEXT };
    final CursorLoader cursorLoader = new CursorLoader(context, NotesContract.AUTHORITY_URI, projection, null, null, null);
    return cursorLoader;
  }

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

  @Override
  public void onLoaderReset(final Loader<Cursor> loader) {
    // data is not available anymore, delete reference
    adapter.swapCursor(null);
  }

}
Java Source Code List
