I'm programming an android app where I want to send large sets of data from an MySQL Table to the app and write this data to an SQLite database.So I know i have send an HttpRequest and I can send data with json, but how can I handle large datasets like tables?I think its no good idea to just concatinate a string together in php and then send it?
View RepliesI am looping through data in Android, using Parse data. I came up with this as a way to get user information; the larger goal is to create a model of data that I can use in an array adapter, so I can create a custom list view (as described here [URL] .... In the example, the data are hard-coded, not pulled from a database.
public static ArrayList<Midwifefirm> getUsers() {
//Parse data to get users
ParseQuery<ParseUser> query = ParseUser.getQuery();
query.orderByAscending(ParseConstants.KEY_PRACTICE_NAME);
query.findInBackground(new FindCallback<ParseUser>() {
[Code] ....
The intention is that for every user that does not have the type patient, collect this data about them, then store it in the arrayList.
On the return statement, though, there is an error: cannot return a value from a method with a void return type.
I may be over complicating this...read through various sources to get a model for this...in the end, I want to display a list of information about specific users, after the user makes a selection of a city...it would therefore display all the information about the medical practices in that city.
I have an application which has 10 million rows and 1000 columns in Oracle. Each value has a different set of calculations that are stored in User Defined PLSQL functions.
Data is displayed in form of data grid. When a user updates any value, the calculation is performed using plsql function and value is stored in database. Is there an easy way through which calculation is performed on the fly and i get maximum performance ?
Our client has a user facing web application running on Jboss. There is a separate admin application (in its own ear) but deployed on same Jboss server on which user facing web application is running.
They need a screen to upload large amount of data into database. Their original files were in excel with size > 60 mb. We suggested following to them:
a. Change upload format to CSV - this brought down file sizes to 25-30 mb
b. Upload process will be MDB - asynchronous processing of data so that admin web app does not stop responding
We also suggested following to them:
a. Host admin app on a different machine so that user facing site does not respond slow during data processing
b. We can provide incremental upload feature and they should upload files in the chunks of 4-5 mb, specifically if they have user a web page to upload such files - they don't buy this argument though.
c. Data processing can be a separate script instead of a part of admin web application. They can FTP files to a designated location and this script will process those files.
I have following questions:
Q1 - Have you seen upload of such large datafiles to a web application? I see sites like Zoho CRM or Salesforce do not support such data imports and mostly fail or not respond.
Q2 - Is there a set of guidelines/best practices to upload large data files of this nature? How do insurance companies or others with enormous set of data accomplish such tasks (what is the architecture of such programs)?
I have a huge data set 10000+ rows which I need to show in the tableview. It take a lot of time to render the UI and is slow.
View Replies View Relatedi have to write more than 100000 rows in a excel sheet (file size more than 20 MB) via java.
when i use XSSF, i am getting below Error.
java.lang.OutOfMemoryError: Java heap space
at org.apache.xmlbeans.impl.store.Saver$TextSaver.resize(Saver.java:1592)
at org.apache.xmlbeans.impl.store.Saver$TextSaver.preEmit(Saver.java:1223)
at org.apache.xmlbeans.impl.store.Saver$TextSaver.emit(Saver.java:1144)
[Code]....
when i use HSSF , i am getting the below Error.
java.lang.OutOfMemoryError: Java heap space
I have tried increasing the java heap size , by giving upto -Xms1500m -Xmx2048m
I am having an array of strings and i want to find out whether these strings contained in the array contain a similar character or not.For example i am having following strings in the array of string:
aadafbd
dsfgdfbvc
sdfgyub
fhjgbjhjd
my program should provide following result: 3 because i have 3 characters which are similar in all the strings of the array(f,b,d).
I can sort strings in a collection by uppercase and then lowercase though I was wondering if there is any way of doing it in reverse, sorting by lowercase then by uppercase.
View Replies View RelatedI am trying to run a project and i am getting different errors, I know the code is working because i have seen it running, but now i cant even get the app to load up. sometime I get a AndroidManifest cannot be found error and sometimes i get a error like
[2014-04-14 17:28:31 - DatabasePrototype5] Failed to install DatabasePrototype5.apk on device 'emulator-5554!
[2014-04-14 17:28:31 - DatabasePrototype5] (null)
[2014-04-14 17:28:32 - DatabasePrototype5] Launch canceled!
my AndroidManifest
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.databaseprototype5"
android:versionCode="1"
android:versionName="1.0" >
[Code] ....
I want to make the board for the game, I want it to be a two-dimensional array of buttons.I know how to make a array but is there a class of buttons that I need to use? and how do I connect it to the xml?I am using eclipse.
View Replies View RelatedI didn't see anything specific to Android. I am a very basic beginner when it comes to JAVA and Android programming.
The app is a very simple comic strip viewer that views 3 panels of a comic strip one at a time. My problem is going from a second activity to another. I can go from the main activity to the second fine but when I press the next button to go from the second activity to the third nothing happens. I have tried a few different things but end up with either nothing happening or the app crashes.
Here is my MainActivity Code:
package net.androidbootcamp.comicapp;
import android.support.v7.app.ActionBarActivity;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
[Code]...
Here is the code for the second panel:
package net.androidbootcamp.comicapp;
import android.app.Activity;
import android.os.Bundle;
public class Panel2 extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
[Code]...
Here is the code for Panel 3:
package net.androidbootcamp.comicapp;
import android.app.Activity;
import android.os.Bundle;
public class Panel3 extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
[Code]...
And here is the manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="[URL].."
package="net.androidbootcamp.comicapp"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
[Code]...
I am sure it is something very simple but I am not sure what it could be.
I have an integer variable called 'selectedname' which is declared as shown below.
public class MainActivity extends Activity implements View.onclickListener, AdapterView.OnItemClickListener {
int selectedname;
So when the app starts an Alert Dialog with two buttons asks the user if they want to tell the first or the last name. The two buttons are 'first' and 'last'.
The problem I'm facing is that in the code the value of selectedname is suppose to change depending on the users choice as shown below.
public void displayWelcome() {
//*other code comes here but it works fine*
AlertDialog.Builder choice = new AlertDialog.Builder(this);
choice.setTitle("Yo!");
choice.setMessage("First name or last");
choice.setPositiveButton("First", new DialogInterface.onclickListener() {
public void onclick(DialogInterface dialog, int whichButton) {
selectedname = 1;
[Code] .....
I am trying to make my first application on Android. I have never done it before. I am totally new at it. I want my app to show as an icon on the launcher but how to do it.
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="net.graphicport.homeinventory" >
<!-- To auto-complete the email text field in the login form with the user's emails -->
<uses-permission android:name="android.permission.GET_ACCOUNTS" />
<uses-permission android:name="android.permission.READ_PROFILE" />
<uses-permission android:name="android.permission.READ_CONTACTS" />
<uses-permission android:name="android.permission.INTERNET" />
[code]...
I am trying to present the user with a response of 'correct' or 'incorrect'. I do the following, but mResultTextView never updates.
mResultTextView.setText("Correct");
android.os.SystemClock.sleep(1000);
I think the problem is that my view needs to be re-drawn.
package com.example.quiz;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Random;
import android.graphics.Color;
[code]...
I have been trying to draw a bitmap image onto the canvas from Android and all it displays is a blank white screen. Whenever my app starts up, I am calling this in my game - view class which extends View and overrides the onDraw method:
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Paint;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
[Code] ....
I'm planning to make a unique news app for android (maybe iOS later) and I am fairly experienced in Java. Im thinking to most likely use RSS feeds, but am unaware how to implement them into JAVA.
View Replies View RelatedI have a gameengine stil partially in the works for pc made in java, I am attempting a port over to java but certain classes and other fuctions are not available for android that there is in java. this means that my render engine, gameengine and a couple of other clases therefore don't work.
My question is, is there anyway of using the gameengine classes that work into the project so that all i have to do is declare within the engine what i want to export for wheather this is android or java. or importing packages from the game engine project and directly linking with the ability of re-writing the odd few classes that do not work.
I'm trying to get my animation for my java game to move along the edges of my device. Once it hits the edge I would like it to turn and keep moving along the edges. I'm sure this is easier than I'm making it but I can't find much on this. Right now my animation moves right and goes right off the screen until the app is closed and restarted.
This is my code so far:
package com.pjf.animation;
import java.io.IOException;
import java.io.InputStream;
import android.content.Context;
import android.content.res.AssetManager;
import android.graphics.Bitmap;
[Code] .....
I'm making a game to teach myself programming java so I can start making android. I have this game I'm making where there will be objects(so far its asteroids) will be falling with a progressive velocity (they will move faster as time goes on). The object is the click on the objects before they hit the bottom. It's still early meaning not all the parts I want to implement are there but it works the way I want it to so far besides my click function.
I'm using the Mouse.isButtonDown(0) to record left click but It lets me hold it down and hover over them instead of clicking on each one. Here is a snippet of the part of the code im talking about :
I uploaded a .jar and a exe file so you can see what I mean
[URL] .... -jar
[URL] .... -exe
public void update(GameContainer gc, int d) throws SlickException
{
posX = Mouse.getX();
posY = (Mouse.getY()-height)*-1;
timePassed += d;
deltaTime= deltaTime();
[Code] .....
I am currently developing an android application. there is a problem i got just now. here's the code for java.
public class doReceipt extends Activity
{
boolean nsPutih, nsBeriyani,nsMinyak,aymKurma,aymLemak,aymKari,aymRendang,aymMerah,
prtAsam, dggTomato, dggSinggang, dggMerah,kerabuTaugeh, pindangKacang,jelatah,dalcaSayur,papadom,
kariIkan,ikanMasin, sirapAis, oren,tehTarik,agarAgar, buburKacang,kuih, price;
TextView tvOutput1,tvOutput2, tvOutput3, tvOutput4, tvOutput5, tvOutput6, tvOutput7, tvOutput8, tvOutput9, tvOutput10,
[Code] ....
There is no error shown in the code. but, when i run my program for start, the page before cannot proceed and yet, i cannot proceed to this page and the application stop unexpectedly. below is the error that i gain in logcat.
11-22 06:59:57.664: D/dalvikvm(290): GC_EXPLICIT freed 1505 objects / 106560 bytes in 184ms
11-22 07:00:39.174: D/dalvikvm(320): GC_FOR_MALLOC freed 2489 objects / 160496 bytes in 109ms
11-22 07:00:39.534: E/MENU PAKEJ A(320): Total Price: RM 0.0
11-22 07:00:39.544: D/AndroidRuntime(320): Shutting down VM
[Code] .....
I tried many times to return a string from java project to an android project But it keeps sending incorrect values as in as it should be 1 here is an example.
Java Project:
boolean somethingboolean = false;
if(something == "1"){
somethingboolean = true;
}
public static String getString(){
if(somethingboolean == true){
return "TRUE";
}else{
return "FALSE";
}
}
Android project:
System.out.println(JavaProject.getString())
And in the android project it prints "FALSE"
So what should i do?
I'm trying to create a Texas hold'em Poker application. A rough idea of it would be similar to those poker games on the playstore e.g. Zynga Poker, however it will be a simplified version, more of a home-based application, for a small group of friends. This way, we can get to play poker on the go with each other, like a private table on the go. Anyway, right now how do I get started?
1) How should I even start this project? Do I start the GUI for the application first? Start designing the applications with photoshop? I figured I need a skeletal guide to start and follow.
2) How do I connect all the players together to a table? I know I could use my phone as a Server, where the rest could connect to mine. But I'm not sure what I should research on. Also, as I'm working towards a "Portable, On the go Application". So I would like to work this more based on 3G/4G networks.
3) Database, I would like something to keep a record on the buy-in, winnings & losings so we can keep track of it. However, if the server was my phone. When I turn off the server, would the database be gone? Maybe I might be able to save it on a notepad in a folder on my phone? I think this is possible.
I am making an android racing game. I have a method that draws the track to the screen, the map is bigger than the screen so i clip the bitmap and draw it to the screen hence to draw the track I have to get the visible track points and then draw them. I have noticed that when I enable drawing the track the game lags quite a bit but when i disable it is smooth as expected the code is below :
public void drawTrack(Canvas canvas) {
if (this.trackPoints != null && this.trackPoints.size() > 0) {
// get points, convert back to screen coords and add them to array,
// then
// use that arraylist<point> below
getCurrentVisibleTrack();
counter++;
if (this.visibleTrackPoints.size() > 0) {
[Code] .....
Using exp4j which is a mathematical parser twice in one routine (or separated) in Eclipse and only the size2 is calculated when app is run in eclipse.
private void calculate size(){
String s1 = size.getText().toString();
String s2 = size2.getText().toString();
try {
Calculable result= new ExpressionBuilder(s1).build();
size1.setText(Double.toString(result.calculate())) ;
[Code] .....
I have some software I need to write. I am planning to write two apps for Android, one of which will send and receive Morse code, and the other to send and receive PSK31 data.
Programming is not my strong point, and I am currently struggling on how to do this. I have researched the software, and I am having a hard time finding out how to decode the audio streams on Android. I have also had difficulty finding examples and source code as what I have found is mostly written in C/C++, whereas I need examples in Java.
At this point I know how to utilize Google Maps within Android but it always seems to take up the full window, there is an image below which shows what I'm attempting to accomplish (having a box below the Google maps where I can store text i.e. "Hello World"
How do I add box below Google Maps, so to store text i.e. "Hello World"
Code so far:
ActivityMain:
Java Code:
public class MainActivity extends Activity {
private GoogleMap googleMap;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
[Code] .....
Image: