(by @andrestaltz)
If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.
package in.codesmith.contactusexample; | |
import android.content.Context; | |
import android.os.AsyncTask; | |
import android.os.Bundle; | |
import android.support.v7.app.ActionBarActivity; | |
import android.text.TextUtils; | |
import android.view.View; | |
import android.widget.Button; | |
import android.widget.EditText; |
/** | |
* Fancy ID generator that creates 20-character string identifiers with the following properties: | |
* | |
* 1. They're based on timestamp so that they sort *after* any existing ids. | |
* 2. They contain 72-bits of random data after the timestamp so that IDs won't collide with other clients' IDs. | |
* 3. They sort *lexicographically* (so the timestamp is converted to characters that will sort properly). | |
* 4. They're monotonically increasing. Even if you generate more than one in the same timestamp, the | |
* latter ones will sort after the former ones. We do this by using the previous random bits | |
* but "incrementing" them by 1 (only in the case of a timestamp collision). | |
*/ |
(by @andrestaltz)
If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.
package com.javatarts.basketballgm.data; | |
import java.io.File; | |
import java.io.FileOutputStream; | |
import java.io.IOException; | |
import java.io.InputStream; | |
import java.io.OutputStream; | |
import android.content.Context; | |
import android.database.sqlite.SQLiteDatabase; |