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R-sf.html - simple answers to questions

What is SF R?

Package sf represents simple features as native R objects. Simple features are implemented as R native data, using simple data structures (S3 classes, lists, matrix, vector). Typical use involves reading, manipulating and writing of sets of features, with attributes and geometries.

What is the SF package in R?

sf: Simple Features for R

Support for simple features, a standardized way to encode spatial vector data. Binds to 'GDAL' for reading and writing data, to 'GEOS' for geometrical operations, and to 'PROJ' for projection conversions and datum transformations.

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How do I view a .SF file?

read.sf: read simple features from file or database
  1. dsn. data source name (interpretation varies by driver - for some drivers, dsn is a file name, but may also be a folder)
  2. layer. layer name (varies by driver, may be a file name without extension)
  3. ... parameter(s) passed on to ST_as.sf.

In this article we are going to see how to get the source code from an APK file and how to customize any android apphi friends the legality before using this guide in a real application, you will find this guide handy in a number of cases e.g.

B. if you accidentally deleted your source code and want to extract it from Apkor to analyze the application for security vulnerabilities or threat detection, this guide can also be used to modify apps to add a new feature or customize the look and feel you can too Add support for unsupported Android versions, but there are some limitations in this guide, this guide does not allow you to extract the exact same source code as it was originally written, some of the code cannot be recovered correctly due to the loss of information during the Dex t o jar conversion, if the app uses a custom framework, you need the custom framework apk file, but most apps do not use custom frameworks, they are mainly used by apps made by OEM manufacturers like HTC, Samsung, LG n, but I'll show you a method that you can use to make some basic changes to Android app easily.The requirements for this guide areYou need a system with JRE 1.7 installedYou needApktoolsDex2jarJD GUILuytenand ZipSigner App a ZIP fileThis ZIP file consists of xmland other Android application resources such as Images in addition to the Android byte code file called dexApktools decodes the resources and XML files and converts the Android byte code into Samli files at assembly level, the Dex2jar converter then converts the Dex files into a Java byte code file umwhi ch will be archived in the JAR file with jd-gui and Luytenwe will decompile Java byte code into Java source code file and then with any Android IDE like eclipseyou can easily bring all files into a single project file.

Let's start installing the required software for this tutorial, after downloading the required software from the links given in the article description below, create a directory with any name in a convenient location on your computer to store the required software, I'll create a directory in my c drive and name it as apk extract if you go to the apktools website choose the latest version of the software at the time of this article the latest version was 2.2 so i will be downloading these apktool_2.2.0.jar files so here is the jar File that i downloaded i will copy it to the directory we just created.

After that there is another link in the description which is apktool.bat to save it as a bat file Right click on Link Click on the save link, after that you will get this apktool.bat file copy this apktool.bat file in the same directory like the apk extract, if your system already has the java runtime installed but the version is 1.8, you can still try to use apktool, if apktool doesn't work then you may need to install the 1.7 versions as the official support of apktools is only for the 1.7 version after you have installed java runtime when opening command prompt that is by clicking starttyping cmd and then clicking cmd.exe typing java version this should show the latest version of your java runtime in my system is it 1.8 but i have both versions installed next we go to the luyten website and download di e download the latest version of the software so under this go to the downloads and select the exe file of this oneluyten-0.4.8.exe click on it to start the download after the download is complete you will receive this exe file again copy the exe file and paste Put them in the apk extract directory next we go down to jd guiagain go and select the zip file which is jd-gui-windows-1.4.0.zip, click on it to start the download process afterwards the download is complete, copy it again to the directory similar to APK extracts for dex in jar.

Don't go to the nightly build that's the unstable version go down and select dex2jar 2.0 version in this select dex-tools-2.0.zip from the apk extraction directory ok now we are going to extract these two zip files by doing right Mouse button click on it and since i have installed winrarit it shows me extract itself here, so i click extract here, similar for jd guiextract here we will copy the entire contents of these two directories into our APK extraction directory, so select all files Ctrl + Aand then cut all files with Ctrl + X go back and then paste all files with Ctrl + V similarly for jd-gui-windows we only need the exe files right-click-copy and then Ctrl + V to paste select d2j-dex2jar.batright click on that file and hit rename and we will rename it to d2j twarevia prompt so shorter the name it would simply be the befe hle the rest we can leave it right now we are going to set the path variables so that we can access these software utilities without mentioning the location in the command prompt, to set the path variable to this new directory, click the start button and then right click on computer and then select properties in Windows 8 and 10 you can right click the Start button directly and then select System Properties which will bring you to the same screen, select Advanced System Settings here and then go to Environment Variables under the 'Advanced' tab click Environment Variables under these in User Variables select the path and click on Edit in this type semicolon and then the path name so we go to the directory and click on the address bar Select the address path of the directory and then copy it back again by pressing Ctrl + C Go to the Edit User Variable dialog, and then paste it by pressing Ctrl + V, then click OK, then click OK again and then OK again Now you should be able to access these software packages from the command prompt without going into the directory go so we can check if it works or notTo do this, open a new command prompt click on startup type in cmd then select cmd.exe and enter the command apktool –versionok here we made a mistake we need to find the apktool_2.2.0.jar file in apktool.

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jar so we are going to do that right away select apktool_2.2.0.yes and hit rename rename to apktool.jarhit just enter and now we are going to test it as you can see that it works correctly shows the correct version 2.2, this guide is divided into two parts In the first part we will see how to decompile and extract the source code from an APK file In the second part we will see s Next, how you can make fundamental changes to the look and feel of any Android app without full decompilation, now we can begin Part One Extracting Java Source Code from APK File The first step is to get the APK file from which you will extract the source code want when you don't have them and This app is available on the Play Store.

Then you can watch our tutorial on how to download the APK file directly from the Play Store by clicking the article link that you can see on the screen once you have the APK file. The second step is to use the APK tools to decode the APK and extract Dex files and the resource files, if the APK uses a custom framework then you will also need a custom framework APK file before starting with start decoding the process, but most of the apps as I mentioned earlier don't use a custom framework and so this shouldn't cause you any problems so let's start the decoding process using the command prompt, go to the directory where your APK file is present In my case, it's this directory, I'm just going to this directory quickly, I'll copy the location and change the directory in the command prompt Type cd, then space double quotes to paste the copied location, right click and choose Paste, and then close the quotes again when your Location on another drive you'll have to re-enter the drive letters so that I wi I just enter that, since my location is EI, will enter E: and then hit Enterok, now our location is set to the location where the APK file is present is. Let's go through the decoding process for this.

If you also have a framework apkt, install the framework apktool, if for framework install then the framework apk name xyz.apkaber since this app which is the pokemongo.apk doesn't have a custom framework, we will do the decoding process for run this type directly inapktool d to decode -m the apk filename, in my case it is pokemongo.apk, I'll copy it quickly quickly rename it ctrl + cthen pasteok this m is for match this is usually done when you don't have to recreate the apkonce that You've changed if you just need the exact same XML file and resource file we are using this command with the match option ok now press enter to start the decoding process ok the command prompt got confused because we have the apktool.bat file in the same directory where the APK file was present in so I had to delete that and then again we'll be running the same command his time it should work right OK as you can see the pokemongo.apk file is being decoded.

A new directory has also been created pokemon gow we will fast-forward it. Ok the decoding process is complete, and we just go to the directory, we will review the files as you would can see the android manifest file is there and there is a lib directory this is the resource directory so this should contain all the images used by the apphere is the app icon ok so we extracted all the resources properly now let's look at the Steps to Extract Java Code from the APK File To do this We are going to use the dex2jar utility to convert the dex file to a jar file Extract the Java code from the JAR file, however Since the conversion of Android Dex code to Java Jar file is not perfect, certain information is lost at this stage, leading to incorrect Java code can hear. Because of this, we are going to use two applications to convert the JAR file to Java code.

If a certain file was not correctly decoded by the first application, we check the code generated by the second applicationlet we start with jd-guito decompile these jar files to do this, go to the apk extract directory and click on jd-gui.exe this file click on runit will take some time to loadok now under this select a file open go to the directory you just converted the apk file to jar files so i select this newly created jar file who have favourited pokemongo-dextojar.jar Click Open, this is all of the Java code that has been converted.

To save this Java code click Files Save All Sources and then select the directory you want to save it in I will save it here click Saveit save will take some time I will fast forward now that you have the resource file as well as the Java Source code you both have from t. can copy heminto an android project now let's see how to do the same with luyten software click on lyuten.exe click on run click on file click on open files go to the directory where the jar file is stored select the jar files select the entire source code click on the files save all the Choosing a location it's going to take some time ok Now the conversion is complete and we have the Java code form and the software Now let's see how you can make basic changes to the look and feel of any Android applet that will start with Part 2 of this tutorial for that we decode the APK file again but this time without the m option, which is the match option, since now we need to rebuild the application after modifying the files we need.

First we are going to delete the previously decoded application. After that go to the Command Prompt again go to the directory where the APK file is located and then type the command apktool d your APK file name without the m option and then hit Enter to do decrypt the apk file and extract all the resource files as well as convert the d ex files to the samli assembly files we will fast forward the article until the decoding process is complete ok the decoding is complete we will make a simple modification we will change the welcome screen of the pokemon go app and add a modified image to do this click on the asset directory, go to bingo to dataand then look for splash.png here, here is the file you can open with any image editor I will use the paint.net, you can also edit with the Run Windows Paint Software Here is the file, I'm going to give this file a very cute pica add kchu picture, for this I will open the picture that I want to overlap here is the picture cute_pickachu.png select the picture click on copyCtrl + Atrl + Cthen we add a new layerthen we will make Ctrl + V keep canvas sizethen we will resizewe save this modified splash screen override it on the original picture click yes okflatt, go there to build the project again, go to command prompt, and then type apktool, you need to be in the same directory where you had the apk file decrypted, here you need to enter the directory name, in my case it is pokemongonow it will start the build process until it is built, make sure you install the zipsigner app, the links are in the article description, or you can search the google play store, ok the build process is now ready to e Click on Pokemon, click on the Dist directory and here is the modified APK, now you need to transfer this modified APK file from your computer to your mobile phone, you can use a USB data cable for this or any application I will do it with ez file -Explorer do and wirelessly transfer transfer file from my pc to phone so open ezfile explorer app click network click remote manager click turn on OK now the FTP server is on so I'll just open the phone directory the APK- File that you just copied to your phone, here is the apk file and then tap the sign file to finish the signing process, now we will go back to the directory on the phone to check the signed apk file now apptap update on the pokemongo-signed.apkit is installed as an update for the app click installok the modified pokemongo app installed Welcome screen we will open the app and here we go we have the cute Picckachu picture right in the middle of the original welcome screen hope this guide has helped you, if so click the like button below if you run into any problem follow this guide share it below in the comment section, we'll do our best to fix it, you can help others by sharing this guide with your friends who you think might benefit from itat howisolve.com.

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What are simple features ( SF ) in your for?

sf: Simple Features for R Support for simple features, a standardized way to encode spatial vector data. Binds to 'GDAL' for reading and writing data, to 'GEOS' for geometrical operations, and to 'PROJ' for projection conversions and datum transformations. Version: 0.9-2 Depends: methods, R (≥ 3.3.0) Imports:

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What does SF stand for in programming language?

sf: Simple Features for R. Support for simple features, a standardized way to encode spatial vector data. Binds to 'GDAL' for reading and writing data, to 'GEOS' for geometrical operations, and to 'PROJ' for projection conversions and datum transformations.

What are the basic features of Cran SF?

CRAN - Package sf sf: Simple Features for R Support for simple features, a standardized way to encode spatial vector data. Binds to 'GDAL' for reading and writing data, to 'GEOS' for geometrical operations, and to 'PROJ' for projection conversions and datum transformations. Version: 0.9-2 Depends: methods, R (≥ 3.3.0) Imports:

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