// give me the date X days from the day represented by cal
public static String getOffsetDate(Calendar cal, int daysOffset){
cal.add(Calendar.DATE, daysOffset);
return dateFormat.format(cal.getTime());
}
Today :2011-01-15 1 days ago : 2011-01-14 2 days ago : 2011-01-12 3 days ago : 2011-01-09 4 days ago : 2011-01-05 5 days ago : 2010-12-31 // wait. what?!
package com.test.calendar;
import java.text.SimpleDateFormat;
import java.util.Calendar;
public class CalendarTestDaysAgo {
private static final SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
/**
* @param args
*/
public static void main(String[] args) {
Calendar cal = Calendar.getInstance(); // today
// set to January 15
cal.set(Calendar.MONTH, Calendar.JANUARY);
cal.set(Calendar.DAY_OF_MONTH, 15);
System.out.print("Today :"+getOffsetDate(cal,0) + "\n");
for (int d = 1; d < 32; d++){
System.out.print(d + " days ago: " + getOffsetDate(cal, d * -1) + "\n");
}
}
// give me the date X days hence from the day represented by cal
public static String getOffsetDate(Calendar cal, int daysOffset){
// this clone() call is required
// otherwise subsequent changes are additive
Calendar newCal = (Calendar) cal.clone();
newCal.add(Calendar.DATE, daysOffset);
return dateFormat.format(newCal.getTime());
}
}
Results in:
Today :2011-01-15 1 days ago : 2011-01-14 2 days ago : 2011-01-13 3 days ago : 2011-01-12 4 days ago : 2011-01-11 5 days ago : 2011-01-10 // that's better. ...
...
<div class='post-footer'>
<div class='post-footer-line post-footer-line-1'><span class='post-author vcard'>
<b:if cond='data:top.showAuthor'>
<data:top.authorLabel/>
<span class='fn'>
<a href='https://plus.google.com/103507786235300238642?rel=author'>
+<data:post.author/></a>
</span>
</b:if>
</span> <span class='post-timestamp'>
...
Props to the Kevin & Amanda blog for providing the blogger signature template tips that lead to this solution.
package com.example.android.filemanagement;
import java.io.File;
import java.io.FilenameFilter;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
import android.app.Activity;
import android.os.Bundle;
import android.os.Environment;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class FileCleanupActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button b = (Button) findViewById(R.id.go);
b.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// Delete those files!
Iterator it = listFiles().iterator();
while (it.hasNext()){
it.next().delete();
}
}
});
TextView tv = (TextView) findViewById(R.id.file_list);
StringBuffer sb = new StringBuffer();
Iterator it = listFiles().iterator();
while (it.hasNext()){
sb.append(it.next().getName() + "\n");
}
tv.setText(sb.toString());
}
private static List listFiles(){
File[] files = Environment.getExternalStorageDirectory()
.listFiles(new ExtensionFilter("jpg"));
return Arrays.asList(files);
}
}
class ExtensionFilter implements FilenameFilter {
private String ext;
public ExtensionFilter(String ext){
this.ext = "."+ext;
}
@Override
public boolean accept(File dir, String filename) {
return filename.endsWith(ext);
}
}
private static Uri getImageFileUri(){
// Create a storage directory for the images
// To be safe(er), you should check that the SDCard is mounted
// using Environment.getExternalStorageState() before doing this
File imagePath = new File(Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_PICTURES), "CameraTest");
if (! imagePath.exists()){
if (! imagePath.mkdirs()){
Log.d("CameraTestIntent", "failed to create directory");
return null;
}
}
// Create an image file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
image = new File(image.getPath() + File.separator +
"IMG_"+ timeStamp + ".jpg");
// Create an File Uri
return Uri.fromFile(image);
}
File imagePath = context.getExternalFilesDirectory(
Environment.DIRECTORY_PICTURES);
#include <SPI.h>
#include <Ethernet.h>
byte mac[] = { 0x90, 0xA2, 0xDA, 0x00, 0x50, 0xA0 }; //physical mac address
byte ip[] = { 192, 168, 1, 177 }; // ip in lan
byte gateway[] = { 192, 168, 1, 1 }; // internet access via router
byte subnet[] = { 255, 255, 255, 0 }; //subnet mask
Server server(80); //server port
byte sampledata=50; //some sample data - outputs 2 (ascii = 50 DEC)
String readString = String(30); //string for fetching data from address
void setup(){
//start Ethernet
Ethernet.begin(mac, ip, gateway, subnet);
//Set pins 2 through 9 to output
for (int i = 2; i <= 9; i++){
pinMode(i, OUTPUT);
}
//enable serial data print
Serial.begin(9600);
}
void loop(){
// Create a client connection
Client client = server.available();
if (client) {
while (client.connected()) {
if (client.available()) {
char c = client.read();
//read char by char HTTP request
if (readString.length() < 30) {
//store characters to string
readString.concat(c);
}
//output chars to serial port
Serial.print(c);
//if HTTP request has ended
if (c == '\n') {
if(readString.indexOf("test=all") > -1) {
httpReply(client);
// cycle through pins 2 to 9
for (int i = 2; i <= 9; i++){
Serial.print("Writing pin ");
Serial.print(i);
Serial.println(" HIGH");
digitalWrite(i, HIGH); // set the LED on
delay(500);
Serial.print("Writing pin ");
Serial.print(i);
Serial.println(" LOW");
digitalWrite(i, LOW);
delay(500);
}
}
//clearing string for next read
readString="";
//stopping client
client.stop();
}
}
}
}
}
void httpReply(Client client){
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println();
client.println("{\"status\" : \"executing\" , \"cmd\" : \"test=all\"}");
client.stop();
}
(MISO) 50 <-- 1 o o 2 --> +5V
(SOCK) 52 <-- 3 o o 4 --> 51 (MOSI)
RESET <-- 5 o o 6 --> GND
Arduino communicates with both the W5100 and SD card using the SPI bus (through the ICSP header).
// Get all of the items from the database and create a list
Cursor cursor = mDbHelper.fetchAllItems();
startManagingCursor(cursor);
// Create a mapping between database columns and layout fields
String[] from = new String[] { DbAdapter.COL_TITLE };
int[] to = new int[] {R.id.text1};
// Create a cursor adapter and set it to display using a row layout
SimpleCursorAdapter notes =
new SimpleCursorAdapter(this, R.layout.list_item, cursor,
from, to);
setListAdapter(notes); // assumes this is a ListArray class
public class CustomDataList extends ListActivity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
}
<ListView
android:id="@android:id/list" ...
private class MyListAdapter extends ResourceCursorAdapter {
public MyListAdapter(Context context, Cursor cursor) {
super(context, R.layout.list_item_with_description, cursor);
}
@Override
public void bindView(View view, Context context, Cursor cursor) {
// TODO Auto-generated method stub
}
}
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
DbAdapter dbHelper = new DbAdapter(this);
dbHelper.open();
// Get a Cursor for the list items
Cursor listCursor = dbHelper.fetchListItems();
startManagingCursor(listCursor);
// set the custom list adapter
setListAdapter(new MyListAdapter(this, listCursor));
}
@Override
public void bindView(View view, Context context, Cursor cursor) {
TextView title = (TextView) view.findViewById(R.id.item_title);
title.setText(cursor.getString(
cursor.getColumnIndex(DbAdapter.COL_TITLE)));
TextView details = (TextView) view.findViewById(
R.id.item_details);
StringBuffer detailsText = new StringBuffer();
int price = cursor.getInt(cursor.getColumnIndex(DbAdapter.COL_PRICE));
if (price > 0){
detailsText.append("$"+price+".00");
} else {
detailsText.append("Price Unavailable");
}
String description = cursor.getString(cursor.getColumnIndex(
DbAdapter.COL_DESCRIPTION));
if (description != null && description.length() > 0){
detailsText.append(", "+description);
}
details.setText(detailsText.toString());
}
public static final String DATE_FORMAT = "yyyyMMddHHmmss";
private static final SimpleDateFormat dateFormat = new
SimpleDateFormat(DATE_FORMAT);
public static long formatDateAsLong(Calendar cal){
return Long.parseLong(dateFormat.format(cal.getTime()));
}
public static Calendar getCalendarFromFormattedLong(long l){
try {
Calendar c = Calendar.getInstance();
c.setTime(dateFormat.parse(String.valueOf(l)));
return c;
} catch (ParseException e) {
return null;
}
}
public long updateDateRecord(long id, Calendar calendar){
ContentValues values = new ContentValues();
// Here is where we apply the Data DateFormat:
values.put(COL_DATE, DateDataFormat
.formatDateAsLong(calendar));
return mDb.update(TABLE_DATES, values, COL_ID + "=" + id, null);
}
private void populateDate(){
String date = null;
if (mListCursor != null && mListCursor.getCount() > 0){
dateId = mListCursor.getLong(
mListCursor.getColumnIndex(DbAdapter.COL_ID));
long d = mListCursor.getLong(
mListCursor.getColumnIndex(DbAdapter.COL_DATE));
if (d > 0){
mDate = DateDataFormat
.getCalendarFromFormattedLong(d);
date = DateDisplayFormat.getFormattedDate(mDate);
}
}
if (date != null){
mDateText.setText(date);
}
}