I want to make my application as a system application. But my application crashes when i make it as system app (placed .apk file inside System/app).
It crashes because its not able to load .so files.
My first question here is do i need to copy the libs( Extract .apk and i will be getting libs) inside System/libs or the System automatically does it?
My Second question here is does the system load libraries(.so files) from System/libs or data/data/myApp.PackageName/lib folder?
Any Help would be Appreciated.
My first question here is do i need to copy the libs( Extract .apk and i will be getting libs) inside System/libs or the System automatically does it?
You don't need to manually copy the .so files.
But, please double check why
It crashes because its not able to load .so files.
you need to ensure that you have the corresponding ABI for your target phone, e.g. you need to have arm64-v8a for your real devices, but this ABI won't work for emulators as usually emulators are x86 or x86_64.
My Second question here is does the system load libraries(.so files) from System/libs or data/data/myApp.PackageName/lib folder?
From data/data/myApp.PackageName/lib
Related
My Android-APP creates text files that have to be read by other apps.
I originally chose the following directory, which no longer works:
Environment.getExternalStoragePublicDirectory((Environment.DIRECTORY_DOCUMENTS))
Right now I'm trying the directory:
getFilesDir()
The problem here is that no other app can access this folder.
I'm puzzled as I simply don't know which directory I can use for an exchange between apps.
I have some files you can say a trained model that I need to get their path in my activity class.
I want to use getFilesDir()but it return "data/user/0/com.example.abc/files/".
I just don't know which folder or directory I have to paste my files exactly in order to be in this path so that these file can be get through getFilesDir().
This is the folder on your device
You can find it by opening "Device File Explorer" (this is a collapsed tab in the bottom right of your Android Studio - written vertically on the right edge, bottom)
There you open the folders data/data/com.yourpackage.name/files
Upload your files to this folder and your app can pick them up.
Hope this helps.
Use this way only to test things. For a production scenario you need to package your files in the project, like in the raw or assets folders of your app's resources, so they are contained in the .apk or .aab app bundle.
You can not access this folder via Windows Explorer. The Device must be in developer mode and adb must be running, so you can only access it through android studio or adb command shell. Keep that in mind.
I'm trying to download an APK file online from within my app and then install it using Java. My code basically, downloads the file to the device from my server and then uses an Intent to open the installation message from the package manager and allow the app to be installed.
It works perfectly for me... unless I save the file to cache instead of regular storage. If I save it to cache instead, I get an error that it could not parse the APK file.
I checked and it is downloading the entire file to the cache correctly, but it just not installing. Any ideas?
The only difference in my code is that instead of using Environment.getExternalStorageDirectory() + "/file.apk" I'm trying to use context.getCacheDir() + "/file.apk" as for my file path.
I want to put the file in the cache so that Android can handle the cleaning of the file and so that I don't need to worry about handling write permissions on different Android versions and the variations of dealing with external storage.
I would like to extract the images from an android game.
Firstly, I took the APK on my windows 10 laptop then I extracted the files (rename files.apk to files.apk.zip and extracted it with 7zip).
Inside my folders I got many .png files but I get an error when I try to open one. Each .png file has another file with the same name but with .png#. Some even have 2 otherfiles with them : one with .skel (can't open this one too) and .atlas (I can open it with notepad):
Did I make mistakes? What can I do to "repair" all these png files?
Thank you for you help!
If you are authorised to do so then you can apktool.
Its easy to use and may that #png files will be converted to some meaningful resource.
Installation for Apktool
Windows:
Download Windows wrapper script (Right click, Save Link As apktool.bat)
Download apktool-2 (find newest here)
Rename downloaded jar to apktool.jar
Move both files (apktool.jar & apktool.bat) to your Windows directory (Usually C://Windows)
If you do not have access to C://Windows, you may place the two files anywhere then add that directory to your Environment Variables System PATH variable.
Try running apktool via command prompt
Link
I created a simple file write/read app in Eclipse and have successfully tested that it could read what it wrote. The structure is fairly simple. I use FileOutputStream to write a samplefile.txt using openFileOutput and a FileInputStream using openFileInput to read it back. The only minor thing is that I don't know where is the file on my physical hard drive? Can anybody point me to where I could find the file in Windows?
If you dont give a absolute path the file will be creataed in aplication directory.
This is /data/data/packge-name-of-your-app/
e.g:
/data/data/com.example.test/
See more http://developer.android.com/training/basics/data-storage/files.html
Go to DDMS perspective, select the emulator which you are using, go to package explorer tag ,then you will get a list of folders hierarchy.
Go to /data/data/
Now you will see a list of packages installed, search for the package name of your app and expand it.
Here you will see the files which your application created when it was running.
P.S : You cannot find this file on the physical drive of your computer,because it is present in the storage of the emulated android virtual device. This storage cannot be directly accessed by you.