Android : Way To Write PerformanceTestCases?
Apr 11, 2009
Does anyone have a simple example of a PerformanceTestCase<http://www.google.co.in/codesearch/p?hl=en#uX1GffpyOZk/core/java/andr...>I want to get some timing metrics for certain business logic functions in my ap. Until now I have been using the current milliseconds and logging functionality but if there is a better way to gather performance metrics I'd love to hear it. Do I have to implement the Intermediates interface or am I missing something?
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Apr 12, 2010
Sorry for the ambiguous title but I'm doing the following to write a simple string to a file:
try {
File root = Environment.getExternalStorageDirectory();
if (root.canWrite()){
System.out.println("Can write.");
File def_file = new File(root, "default.txt");
FileWriter fw = new FileWriter(def_file);
BufferedWriter out = new BufferedWriter(fw);
String defbuf = "default";
out.write(defbuf);
out.flush();
out.close();
}
else
System.out.println("Can't write.");
}catch (IOException e) {
e.printStackTrace();
}
But root.canWrite() seems to be returning false everytime. I am not running this off of an emulator, I have my android Eris plugged into my computer via USB and running the app off of my phone via Eclipse. Is there a way of giving my app permission so this doesn't happen? Also, this code seems to be create the file default.txt but what if it already exists, will it ignore the creation and just open it to write or do I have to catch something like FileAlreadyExists(if such an exception exists) which then just opens it and writes?
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Jun 16, 2009
I'm trying to develop/port a game to Android, but it's in C, and Android supports Java, but I'm sure there must be a way to get a C app on there, anyone knows of a good tutorial on the subject?
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Sep 12, 2009
Is there anyway to write android applications in PHP? This page clearly mentions that Android apps should be written in Java. Just wondering if there is another way. http://developer.android.com/guide/topics/fundamentals.html.
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Nov 8, 2010
in my application I have strings.xml file under values folder. strings.xml file contain array. Now I want to add element to that array at runtime. How to do that?
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Apr 4, 2009
I would like to know how to write to file. I have tried using OutPutStream out = new FileOutPutStream(fileName); out.write(byte [], 0, length);This way always returns Parent directory or File is not writable.I have also used openFileOutPut(fileName, MODE_PRIVATE) method but this method works properly if it is called from the same class which has extended Activity and I am writing to the file in different class and that too in different thread.I have tried to get the Application Context through getApplciationContext and call openFileOutPut method but still theres something wrong that I am doing.So please can someone suggest me a proper way to write to a file.
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Jun 18, 2010
I'm writing a Android.mk to make a APK-A. and APK-A would use other classes defined in APK-B. I wonder that how should I wrote the Android.mk to include APK-B. Which tag should I use?
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Nov 21, 2010
I am trying to write an XML file to a url e.g. http://myIPAddress/myFolder/myFile.xml
I am using an Apache2 server for my tests on Ubuntu 10.10
Output line example (ignore apostrophe):
<'myEntity id="1" name="me" />
Also, i want to able to reopen the connection anytime and add lines to the end of the file.
I'd post my attempt here for correction but it's a sad one.
I am trying OutputStreamWriter with URLConnection, please correct me if i should be using a different approach.
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Dec 15, 2009
I'll open with, I googled this thing like crazy, searched anddev and a few other boards (including this one) and can't quite find what I'm looking for.
The predicament : all CSV examples are in reference to contacts, and the file read/write posts (the ones that I need) make the assumption that I am not a beginner and most don't even post any code leaving me nothing to learn on.
The hopeful solution : a link to a solid example of simply how to write to a CSV with my own custom fields and values, and how to read a CSV and load said values.
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Mar 25, 2013
How I can show keyboar to write like text on canvas by soft keyboad?
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Nov 22, 2010
I have a bitmap displayed on ImageView now i want to give a facility to write comment typed by the user on that bitmap.i tried using Canvas canvas = new Canvas(srcBitmap); canvas.drawText("Hello", 100,100,null);but this is giving me following error java.lang.IllegalStateException: Immutable bitmap passed to Canvas constructor later on i want to save this whole image a bitmap.
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Aug 5, 2009
I send a lot of sms messages everyday and I'd like to write them using my PC keyboard... then this text should be sent to my Htc Magic which sends it to a specified number. I used to do that with Nokia PC Suite... Is there any software.
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Oct 13, 2010
EDIT: Problem solved, FileOutputStream defined uncorrectly, change to: fos = new FileOutputStream( root + "/" + saveFileName );
I have a problem writing to the SD card, here is the code: (Sorry about the layout of the code, just copy pased it )
public class SaveAndReadManager {
private String result;
private String saveFileName = "eventlist_savefile";
public String writeToFile( ArrayList<Event> arrlEvents ){
FileOutputStream fos = null;
ObjectOutputStream out = null;...............................
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Jan 23, 2010
I would like my app to archive the application DB to the SD card. In my code I check if the directory can Write(), and if not then throw an IOException. In this perticular instance, I am trying to copy the db file to the root directory on the SD card, but its throwing an IOException. How can I change the permission on a folder/file to be able to write to it
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Oct 16, 2009
Current I just use Android 1.6 emulator. I am writing a simple code which needs write one result file to SD card. But It is failed to open one file to write (Reading is ok). I tried to use C level API and Java level API but both of them are failed. Furthermore, I tried to use chmod comand in the shell but it is still useless. It is known in the Android 1.5 or befor, it should be OK. Is it a new feature of 1.6 or it is just my emulator's issue? If it is a new feature, can someone figure out how to write the data into SD card?
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Aug 23, 2010
I am using the following code to download a file from my server then write it to the root directory of the sd card, it all works fine:
package com.downloader;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import android.os.Environment;
import android.util.Log;
public class Downloader {......................
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Mar 17, 2010
I'm trying to write a file from an Http post reply to a file on the sdcard. Everything works fine until the byte array of data is retrieved. I've tried setting WRITE_EXTERNAL_STORAGE permission in the manifest and tried many different combinations of tutorials I found on the net. How my app writes file is by using a thread. Specifically, a thread is invoked from another thread when a file has to be written, so giving an activity object didn't work even though I tried it. The app has come a long way and I cannot change how the app is currently written. CODE:..................
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Nov 1, 2010
my application is contact list and i want to store my contact data in sd card but how can i store data in sd card, or if i will use database then how i want to store it or using simple file than how i want to store it
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Apr 30, 2010
im just trying to save some text to a file on android and while it works fine on the emulator "dont crash", when i try it on my phone it crashes, what am i doing wrong?i do know it crashes on " File root = Environment.getExternalStorageDirectory(); " i just dont know why. showMes() is just a function to make toast.
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Nov 20, 2010
Please tell that In which topics of Java, One should already be an expert, in order to write Android Applications?
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Oct 10, 2010
I am trying to write a select query from one single table in SQLite DB in my app where data exists.
This is the SQL.table has these columns - id(INTEGER), start_time(INTEGER), category(TEXT)
select category from tuuserid_pref where id = (select max(id) from tuuserid_pref
where start_time < '1242'); by the way I want to bind the value shown in 1242 which I have in an Integer variable.
I have written selects and inserts and updates without binding parameters and they work using db.execSQL and db.rawQuery functions but just cannot figure the binding parameters out.
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Jan 6, 2010
I use the youtube api and other libs such as gdata_client... http://code.google.com/intl/zh-TW/apis/youtube/getting_started.html but I always get the verify error: so I want to confirm whether Android can integrate gdata and youtube api(lib)? or is there have mailing list for "gdata" that I can serach for problems?
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Apr 23, 2009
Though there is a library written by a c language, I cannot call it from UI side because it is not a JNI library.
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Mar 2, 2010
I want to write some debugging output to the log to review it with logcat. If I write something to System.out this is already displayed in logcat. What is the clean way to write to the log and add levels and tags to my output?
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Sep 22, 2010
I've already written a game engine in java using eclipse and opengl es, I had one project (an android project) which contained both of my packages com.logic.engine com.logic.testapp I wanted a way to keep my engine and test app seperate, I've made an earlier post about how this is done, and I figured out how to reference one project in the build path of another (or just creating a jar file). My problem is that, lets say I now have my engine all wrapped up in an android project com.logic.engine, and now someone would like to use this engine to create a game, so they create an android project com.someclient.game, well now because we have one android project referencing another, it crashes everytime. Now obviously i need the android sdk in my engine package in order to reference things, but its also required on the client app, since the activity is what is actually being run by android. I guess my question is, how can i create a project for my game engine without it being an android project, but still referencing the android sdk, and without causing it to crash the client app using it?
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Sep 26, 2010
This should be trivial, but for whatever reason I can't find any easy way to do this. Coming from C# where this is a 1 line call, I don't understand why Java makes this so complicated, and on top of that android leaves even that out of its libraries. Anyway all I want to do is write an
org.w3c.dom.Document
that I have populated to a xml file. It should be as easy as opening a stream and writing document.toString(). But that doesn't work. My hope is I'm just missing something.
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Apr 17, 2009
I wrote a file to the sdcard, but it failed as follow:String sdcardFIle = "/sdcard/xxx.txt" FileOutputStream fos = openFileOutput (sdcardFile, Context. MODE_ WORLD_ WRITABLE ) ; openFileOutput failed, because fIle "/sdcard/xxx.txt" contains a path seperator. It is so strange. Is there another way to handle the situation?
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Mar 31, 2010
I'm trying to save a file in a subdirectory in Android 1.5.I get a exception saying I can't have directory separator in a file name ("/"). I'm missing something of working with files in Android..I thought I could use the standard Java classes but they don't seem to work.I searched the Android documentation but I couldn't fine example and google is not helping me too.I'm asking the wrong question (to google).
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May 27, 2010
i'm having this issue of not being able write text file into the SDCard. I'm running the program through eclipse on a HTC magic version 2.1. i had the USB cable unplugged before i run the program. It says that the parent directory of file does not exist: data2/ abc.text
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Jul 3, 2010
Today, i tried to read and write file on the android. but it seems that file write mode is only provided for SD card? most of article is asked about SD card written. Is there no way to save data internal side?So when i install the application to real device. then its application installed in SD card or internal space? because we have make it log file from our application for everytime while application run.So, how do we write the file to SD card and specified the absolute path where we saved? to load this file.
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