Creating a file

[bv-noake]

Hi, I have this code that i am using to write to a file, I know it works as i have tested it normally using python however, when i try to use it in android studio it tells me the file is read only.

images.execute("SELECT Picture FROM Pictures") record = images.fetchall() for row in record: photo = row[0]

    if os.path.exists("myfile.jpg"):
        print("The file exists")
        os.remove("myfile.jpg")
        with open("myfile.jpg", "wb") as fh:
            fh.write(photo)
            fh.close()
        image = face_recognition.load_image_file("myfile.jpg")
        known_face_encodings.append(face_recognition.face_encodings(image)[0])
    else:
        print("The file does not exist")
        with open("myfile.jpg", "wb") as fh:
            fh.write(photo)
            fh.close()
        image = face_recognition.load_image_file("myfile.jpg")
        known_face_encodings.append(face_recognition.face_encodings(image)[0])

[bv-noake]

D/AndroidRuntime: Shutting down VM E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.wit, PID: 25369 java.lang.IllegalStateException: Could not execute method for android:onClick at androidx.appcompat.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:402) at android.view.View.performClick(View.java:7125) at android.view.View.performClickInternal(View.java:7102) at android.view.View.access$3500(View.java:801) at android.view.View$PerformClick.run(View.java:27336) at android.os.Handler.handleCallback(Handler.java:883) at android.os.Handler.dispatchMessage(Handler.java:100) at android.os.Looper.loop(Looper.java:214) at android.app.ActivityThread.main(ActivityThread.java:7356) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930) Caused by: java.lang.reflect.InvocationTargetException at java.lang.reflect.Method.invoke(Native Method) at androidx.appcompat.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:397) at android.view.View.performClick(View.java:7125)  at android.view.View.performClickInternal(View.java:7102)  at android.view.View.access$3500(View.java:801)  at android.view.View$PerformClick.run(View.java:27336)  at android.os.Handler.handleCallback(Handler.java:883)  at android.os.Handler.dispatchMessage(Handler.java:100)  at android.os.Looper.loop(Looper.java:214)  at android.app.ActivityThread.main(ActivityThread.java:7356)  at java.lang.reflect.Method.invoke(Native Method)  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)  Caused by: com.chaquo.python.PyException: OSError: [Errno 30] Read-only file system: 'myfile.jpg' at .facerecognition.main(facerecognition.py:64) at .chaquopy_java.call(chaquopy_java.pyx:283) at .chaquopy_java.Java_com_chaquo_python_PyObject_callAttrThrows(chaquopy_java.pyx:255) at com.chaquo.python.PyObject.callAttrThrows(Native Method) at com.chaquo.python.PyObject.callAttr(PyObject.java:207) at com.example.wit.MainActivity.takepicture(MainActivity.java:99) at java.lang.reflect.Method.invoke(Native Method)  at androidx.appcompat.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:397)  at android.view.View.performClick(View.java:7125)  at android.view.View.performClickInternal(View.java:7102)  at android.view.View.access$3500(View.java:801)  at android.view.View$PerformClick.run(View.java:27336)  at android.os.Handler.handleCallback(Handler.java:883)  at android.os.Handler.dispatchMessage(Handler.java:100)  at android.os.Looper.loop(Looper.java:214)  at android.app.ActivityThread.main(ActivityThread.java:7356)  at java.lang.reflect.Method.invoke(Native Method)  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)  I/Process: Sending signal. PID: 25369 SIG: 9 Process 25369 terminated.

[mhsmith]

If you want to read a file included with your source code, please see #144.

If you want to write a file, use getFilesDir as described in https://github.com/chaquo/chaquopy/issues/177#issuecomment-557496897.

[bv-noake]

How would i use this line to make a jpg file:

df_signaures.to_csv(files_dir+'graduate_signatures.csv')

[mhsmith]

I'm not familiar with the library you're using, but if you want to construct a filename, then you'll need to do it like this:

files_dir + "/" + filename

or this:

from os.path import join
join(files_dir, filename)

[mhsmith]

I'm not sure why you've re-asked the original question on StackOverflow: you won't get a better answer than what I've already provided. If you need some clarification then let's continue the conversation here.

[anuuzsoni]

i want to write a file so that i can see it in my phone's internal storage..plz tell how to do...

[mhsmith]

As I wrote above, you can use getFilesDir as described in https://github.com/chaquo/chaquopy/issues/177#issuecomment-557496897.

[anuuzsoni]

sorry sir, but i did the same...but i cannot locate the file in my mobile's file manager...plz give a full demostration and share the related documents....thank you sir

[anuuzsoni]

More specifically i want to write a file to the downloads folder of my internal storage

[anuuzsoni]

check this and plz help me solve

[mhsmith]

The Android documentation refers to the downloads folder as "external storage", although most recent phones store it on the same hardware as everything else.

Unfortunately the rules around accessing external storage are complex and have changed several times in the history of Android. For details, see https://github.com/chaquo/chaquopy/issues/38#issuecomment-388632574.