/***
Copyright (c) 2008-2012 CommonsWare, LLC
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.
From _The Busy Coder's Guide to Advanced Android Development_
http://commonsware.com/AdvAndroid
*/
package com.commonsware.android.constants;
import android.app.AlertDialog;
import android.app.ListActivity;
import android.content.ContentValues;
import android.content.DialogInterface;
import android.database.Cursor;
import android.os.Bundle;
import android.view.ContextMenu;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.EditText;
import android.widget.ListAdapter;
import android.widget.SimpleCursorAdapter;
public class ConstantsBrowser extends ListActivity {
private static final int ADD_ID = Menu.FIRST+1;
private static final int DELETE_ID = Menu.FIRST+3;
private static final String[] PROJECTION = new String[] {
Provider.Constants._ID, Provider.Constants.TITLE,
Provider.Constants.VALUE};
private Cursor constantsCursor;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
constantsCursor=managedQuery(Provider.Constants.CONTENT_URI,
PROJECTION, null, null, null);
ListAdapter adapter=new SimpleCursorAdapter(this,
R.layout.row, constantsCursor,
new String[] {Provider.Constants.TITLE,
Provider.Constants.VALUE},
new int[] {R.id.title, R.id.value});
setListAdapter(adapter);
registerForContextMenu(getListView());
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
menu.add(Menu.NONE, ADD_ID, Menu.NONE, "Add")
.setIcon(R.drawable.add)
.setAlphabeticShortcut('a');
return(super.onCreateOptionsMenu(menu));
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case ADD_ID:
add();
return(true);
}
return(super.onOptionsItemSelected(item));
}
@Override
public void onCreateContextMenu(ContextMenu menu, View v,
ContextMenu.ContextMenuInfo menuInfo) {
menu.add(Menu.NONE, DELETE_ID, Menu.NONE, "Delete")
.setIcon(R.drawable.delete)
.setAlphabeticShortcut('d');
}
@Override
public boolean onContextItemSelected(MenuItem item) {
switch (item.getItemId()) {
case DELETE_ID:
AdapterView.AdapterContextMenuInfo info=
(AdapterView.AdapterContextMenuInfo)item.getMenuInfo();
delete(info.id);
return(true);
}
return(super.onOptionsItemSelected(item));
}
private void add() {
LayoutInflater inflater=LayoutInflater.from(this);
View addView=inflater.inflate(R.layout.add_edit, null);
final DialogWrapper wrapper=new DialogWrapper(addView);
new AlertDialog.Builder(this)
.setTitle(R.string.add_title)
.setView(addView)
.setPositiveButton(R.string.ok,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int whichButton) {
processAdd(wrapper);
}
})
.setNegativeButton(R.string.cancel,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int whichButton) {
// ignore, just dismiss
}
})
.show();
}
private void delete(final long rowId) {
if (rowId>0) {
new AlertDialog.Builder(this)
.setTitle(R.string.delete_title)
.setPositiveButton(R.string.ok,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int whichButton) {
processDelete(rowId);
}
})
.setNegativeButton(R.string.cancel,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int whichButton) {
// ignore, just dismiss
}
})
.show();
}
}
private void processAdd(DialogWrapper wrapper) {
ContentValues values=new ContentValues(2);
values.put(Provider.Constants.TITLE, wrapper.getTitle());
values.put(Provider.Constants.VALUE, wrapper.getValue());
getContentResolver().insert(Provider.Constants.CONTENT_URI,
values);
constantsCursor.requery();
}
private void processDelete(long rowId) {
String[] args={String.valueOf(rowId)};
getContentResolver().delete(Provider.Constants.CONTENT_URI,
Provider.Constants._ID+"=?", args);
constantsCursor.requery();
}
class DialogWrapper {
EditText titleField=null;
EditText valueField=null;
View base=null;
DialogWrapper(View base) {
this.base=base;
valueField=(EditText)base.findViewById(R.id.value);
}
String getTitle() {
return(getTitleField().getText().toString());
}
float getValue() {
return(new Float(getValueField().getText().toString())
.floatValue());
}
private EditText getTitleField() {
if (titleField==null) {
titleField=(EditText)base.findViewById(R.id.title);
}
return(titleField);
}
private EditText getValueField() {
if (valueField==null) {
valueField=(EditText)base.findViewById(R.id.value);
}
return(valueField);
}
}
}