How to save byte array as a file in android and how to view that file in codenameone?

[kantha...@gmail.com]

If you are experiencing an issue please mention the full platform your issue applies to:
IDE: NetBeans/Eclipse/IDEA
Desktop OS
Simulator
Device

I am trying to save the byte array as a file using below code.

FileSystemStorage fs = FileSystemStorage.getInstance();
        OutputStream os = fs.openOutputStream(fs.getAppHomePath() + "MyFileName.txt");
        os.write(myByteData);
        Util.cleanup(os);

I have tested this in android 7.0 and android 4.4.. 

In android 7.0, fs.getAppHomePath() returning path like file:///data/user/0/com.engravsystems.emqim/files/

In android 4.4, fs.getAppHomePath() returning path like file:///data/data/com.engravsystems.emqim/files/ 

and i am getting exception like "java.io.IOException: /com.engravsystems.emqim/files/MyFileName.pdf not found" in both devices.

Is there something I'm missing? 

[Shai Almog]

I think your code is correct. I think that app home might not exist which seems to me like an omission on our part.
Try

fs.mkdir(fs.getAppHomePath());

[kantha...@gmail.com]

Thanks shai for reply.. I have tried "fs.mkdir(fs.getAppHomePath());" like below but still i'm getting  

java.io.IOException: file:///data/data/com.engravsystems.emqim/files//MyFileName.pdf not found ..

here is the code :

  FileSystemStorage fs = FileSystemStorage.getInstance();

                    try {

                        if(!fs.exists(fs.getAppHomePath()))
                            fs.mkdir(fs.getAppHomePath());

                        OutputStream os = fs.openOutputStream(fs.getAppHomePath() + "MyFileName.pdf");
                        os.write(hrFiles.get(finalI).get("fileData").toString().getBytes());
                        Util.cleanup(os);
                    } catch (IOException e) {
                        e.printStackTrace();
                    }

[Steve Hannah]

It is very strange that the IOException is reporting the path with the file:/// prefix.   This should have been stripped by the time it gets there.  Can you post a full stack trace?

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Steve Hannah

Software Developer

Codename One

http://www.codenameone.com

[kantha...@gmail.com]

Sorry for late reply Steve..
here is the full stack trace

Resource not found: file:///data/data/com.mypackage.myapp/files/MyFileName.pdf

java.io.IOException: file:///data/data/com.mypackage.myapp/files/MyFileName.pdf not found

     at com.codename1.ui.util.Resources.open(Resources.java:740)

     at com.codename1.ui.util.Resources.open(Resources.java:679)

     at com.mypackage.myapp.MyFileNameForm$1.actionPerformed(MyFileNameForm.java:158)

     at com.codename1.ui.util.EventDispatcher.fireActionEvent(EventDispatcher.java:349)

     at com.codename1.ui.Button.fireActionEvent(Button.java:499)

     at com.codename1.ui.Button.released(Button.java:533)

     at com.codename1.ui.Button.pointerReleased(Button.java:637)

     at com.codename1.ui.Form.pointerReleased(Form.java:2980)

     at com.codename1.ui.Component.pointerReleased(Component.java:4100)

     at com.codename1.ui.Display.handleEvent(Display.java:2061)

     at com.codename1.ui.Display.edtLoopImpl(Display.java:1043)

     at com.codename1.ui.Display.mainEDTLoop(Display.java:961)

     at com.codename1.ui.RunnableWrapper.run(RunnableWrapper.java:120)

     at com.codename1.impl.CodenameOneThread$1.run(CodenameOneThread.java:60)

     at java.lang.Thread.run(Thread.java:841)

and i forgot to mention that , while trying to open file using below code getting this exception.. 

try {
    Resources.open(fs.getAppHomePath() + "MyFileName.pdf");
} catch (IOException e) {
    e.printStackTrace();
}

but still don't know it is saving or not..

[Shai Almog]

Why are you calling Resources.open?
Try Display.getInstance().execute().

Resources.open works with "resource files" not files.

[kantha...@gmail.com]

when i tried to call "Display.getInstance().execute()" method it is asking URL but here i have byte array(byte[])..
so how can i use "Display.getInstance().execute()" for byte array(byte[]).

[Steve Hannah]

If you're loading a resource file from the file system, you'll need to use the Resources.open(InputStream) variant.  (i.e. open an input stream from the file system, and pass that to Resources.open().

Steve

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[kantha...@gmail.com]

No Steve, i don't want to load resource file,  here i want to load byte array(getting from service) as pdf file.

how to load byte array as pdf file? .    

[Shai Almog]

You did 99% of the work. You saved the file to the right location now you just need to execute that file:

Display.getInstance().execute(fs.getAppHomePath() + "MyFileName.pdf");

[kantha...@gmail.com]

Thank you so much shai.. its working now ..