org.flerda.android.honeypad.NoteEditFragment.java Source code

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Here is the source code for org.flerda.android.honeypad.NoteEditFragment.java

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/*
 * Copyright (C) 2011 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.flerda.android.honeypad;

import org.flerda.android.honeypad.R;
import org.flerda.android.honeypad.widget.WidgetProvider;

import android.appwidget.AppWidgetManager;
import android.content.ComponentName;
import android.content.ContentValues;
import android.database.Cursor;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.text.Editable;
import android.text.TextUtils;
import android.text.TextWatcher;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class NoteEditFragment extends Fragment {

    private EditText mTitleText;
    private EditText mBodyText;
    private boolean mIsV11 = Build.VERSION.SDK_INT >= 11;
    public static String ARGUMENT_POP_ON_SAVE = "POPS";

    // expose the currently displayed note
    protected Uri mCurrentNote;
    private Button mConfirmButton;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View v = inflater.inflate(R.layout.note_edit, container, false);

        mTitleText = (EditText) v.findViewById(R.id.title);
        mBodyText = (EditText) v.findViewById(R.id.body);
        mConfirmButton = (Button) v.findViewById(R.id.confirm);
        mConfirmButton.setOnClickListener(new View.OnClickListener() {
            public void onClick(View view) {
                saveNote();
            }
        });
        TextWatcher confirmButtonEnabledStateUpdater = new TextWatcher() {
            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {
            }

            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
            }

            @Override
            public void afterTextChanged(Editable s) {
                updateConfirmButton();
            }
        };
        mTitleText.addTextChangedListener(confirmButtonEnabledStateUpdater);

        if (savedInstanceState != null && savedInstanceState.containsKey(NotesProvider.KEY_ID)) {
            mCurrentNote = Uri.parse((String) savedInstanceState.getString(NotesProvider.KEY_ID));
        }
        populateFields();
        updateConfirmButton();
        return v;
    }

    private void updateConfirmButton() {
        mConfirmButton.setEnabled(!TextUtils.isEmpty(mTitleText.getText()));
    }

    /**
     * Display a particular note in this fragment.
     * 
     * @param noteUri
     *            The Uri of the note to display
     */
    protected void loadNote(Uri noteUri) {
        mCurrentNote = noteUri;
        if (isAdded()) {
            populateFields();
        }
    }

    /**
     * Clear all fields on this fragment.
     */
    protected void clear() {
        mTitleText.setText(null);
        mBodyText.setText(null);
        mCurrentNote = null;
    }

    /**
     * Helper method which retrieves & displays the content of the current note.
     */
    private void populateFields() {
        if (mCurrentNote != null) {

            Cursor c = null;
            try {
                c = getActivity().getContentResolver().query(mCurrentNote, null, null, null, null);
                if (c.moveToFirst()) {
                    mTitleText.setText(c.getString(NotesProvider.TITLE_COLUMN));
                    mBodyText.setText(c.getString(NotesProvider.BODY_COLUMN));
                }
            } finally {
                if (c != null) {
                    c.close();
                }
            }
        }
    }

    @Override
    public void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        if (mCurrentNote != null) {
            outState.putString(NotesProvider.KEY_ID, mCurrentNote.toString());
        }
    }

    /**
     * Persists the details of the current note. This will either create a new
     * note, or update an existing note.
     */
    private void saveNote() {
        ContentValues values = new ContentValues(2);
        values.put(NotesProvider.KEY_TITLE, mTitleText.getText().toString());
        values.put(NotesProvider.KEY_BODY, mBodyText.getText().toString());
        final boolean updating = mCurrentNote != null;
        if (updating) {
            getActivity().getContentResolver().update(mCurrentNote, values, null, null);
        } else {
            Uri newNote = getActivity().getContentResolver().insert(NotesProvider.CONTENT_URI, values);

            if (newNote != null) {
                mCurrentNote = newNote;
            }
        }

        // show a toast confirmation
        Toast.makeText(getActivity(), updating ? R.string.note_updated : R.string.note_saved, Toast.LENGTH_SHORT)
                .show();

        if (mIsV11) {
            // update widget
            AppWidgetManager awm = AppWidgetManager.getInstance(getActivity());

            awm.notifyAppWidgetViewDataChanged(
                    awm.getAppWidgetIds(new ComponentName(getActivity(), WidgetProvider.class)), R.id.stack_view);
        }
        Toast.makeText(getActivity(), "Note Saved", Toast.LENGTH_SHORT).show();
        Bundle b = getArguments();
        if (null != b && b.containsKey(ARGUMENT_POP_ON_SAVE)) {
            getFragmentManager().popBackStack();
        }
    }

}