Android example source code file (WikiNoteEditor.java)

This example Android source code file (WikiNoteEditor.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" ^TM.

Java - Android tags/keywords

activity_result, android, bundle, button, content, edittext, intent, onclicklistener, os, override, string, ui, view, widget, wikinoteeditor

The WikiNoteEditor.java Android example source code

/* 
 * Copyright (C) 2008 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 com.google.android.wikinotes;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;

import com.google.android.wikinotes.db.WikiNote;

/**
 * Wikinote editor activity. This is a very simple activity that allows the user
 * to edit a wikinote using a text editor and confirm or cancel the changes. The
 * title and body for the wikinote to edit are passed in using the extras bundle
 * and the onFreeze() method provisions for those values to be stored in the
 * icicle on a lifecycle event, so that the user retains control over whether
 * the changes are committed to the database.
 */
public class WikiNoteEditor extends Activity {

    protected static final String ACTIVITY_RESULT =
	    "com.google.android.wikinotes.EDIT";
    private EditText mNoteEdit;
    private String mWikiNoteTitle;

    @Override
    protected void onCreate(Bundle icicle) {
	super.onCreate(icicle);
	setContentView(R.layout.wiki_note_edit);

	mNoteEdit = (EditText) findViewById(R.id.noteEdit);

	// Check to see if the icicle has body and title values to restore
	String wikiNoteText =
	        icicle == null ? null : icicle.getString(WikiNote.Notes.BODY);
	String wikiNoteTitle =
	        icicle == null ? null : icicle.getString(WikiNote.Notes.TITLE);

	// If not, check to see if the extras bundle has these values passed in
	if (wikiNoteTitle == null) {
	    Bundle extras = getIntent().getExtras();
	    wikiNoteText =
		    extras == null ? null : extras
		            .getString(WikiNote.Notes.BODY);
	    wikiNoteTitle =
		    extras == null ? null : extras
		            .getString(WikiNote.Notes.TITLE);
	}

	// If we have no title information, this is an invalid intent request
	if (TextUtils.isEmpty(wikiNoteTitle)) {
	    // no note title - bail
	    setResult(RESULT_CANCELED);
	    finish();
	    return;
	}

	mWikiNoteTitle = wikiNoteTitle;

	// but if the body is null, just set it to empty - first edit of this
	// note
	wikiNoteText = wikiNoteText == null ? "" : wikiNoteText;

	// set the title so we know which note we are editing
	setTitle(getString(R.string.wiki_editing, wikiNoteTitle));

	// set the note body to edit
	mNoteEdit.setText(wikiNoteText);

	// set listeners for the confirm and cancel buttons
	((Button) findViewById(R.id.confirmButton))
	        .setOnClickListener(new OnClickListener() {
		    public void onClick(View view) {
		        Intent i = new Intent();
		        i.putExtra(ACTIVITY_RESULT, mNoteEdit.getText()
		                .toString());
		        setResult(RESULT_OK, i);
		        finish();
		    }
	        });

	((Button) findViewById(R.id.cancelButton))
	        .setOnClickListener(new OnClickListener() {
		    public void onClick(View view) {
		        setResult(RESULT_CANCELED);
		        finish();
		    }
	        });
	if (!getSharedPreferences(Eula.PREFERENCES_EULA,
				  Activity.MODE_PRIVATE)
	    .getBoolean(Eula.PREFERENCE_EULA_ACCEPTED, false)) {
	    Eula.showEula(this);
	}
    }

    @Override
    protected void onSaveInstanceState(Bundle outState) {
	super.onSaveInstanceState(outState);
	outState.putString(WikiNote.Notes.TITLE, mWikiNoteTitle);
	outState.putString(WikiNote.Notes.BODY, mNoteEdit.getText().toString());
    }
}