Writing a zip to internal storage -- file doesn't exist after download completion

Question

I used a tutorial to download a zip into a subdirectory of my application's internal storage. I wrote the zip to /data/data/my.package.name/files/mySubDirectory/the.zip.

But, when I check to see whether the zip exists, it doesn't:

    String fileDirectory = this.getFilesDir().getAbsolutePath() + "/mySubDirectory/the.zip";
    File file = new File(fileDirectory);
    if(file.exists()) {
        Log.e(this.class.getName(), "file exists");
    } else {
        Log.e(this.class.getName(), "file doesn't exist");
    }

I verified that fileDirectory is the same path as the File outFile for the FileOutputStream.

What could be the problem?

Please can you please tell me the exact path of where your file lies? — GrIsHu, Jan 20 '13 at 06:32
I wrote it to `/data/data/my.package.name/files/mySubDirectory/the.zip` — boo-urns, Jan 20 '13 at 06:35
@DarrenGreen: Wouldn't accessing /data/data folder require root access?? Perhaps that is the reason for the problem? — Siddharth Lele, Jan 20 '13 at 06:45
@DarrenGreen: Also, the tutorial you have followed describes how you can download and store files on the SD card. — Siddharth Lele, Jan 20 '13 at 06:47
I know that the tutorial is for the SD card, but I tweaked it to write to internal storage. I actually figured out my problem. — boo-urns, Jan 20 '13 at 06:51

Ryan Heitner · Answer 1 · 2013-01-20T13:43:08.357

Try using getFilesDir() + "/" subdirectory + "/" "the.zip" Without the getabsolutepath(). That is what I used could be the issue.

OK maybe you problem is with permissions do you see the file in the DDMS under data/data/package/files ? Check the permissions for the files

Here is my code

         String path = getFilesDir() + "/"
            + subDirName + "/";
            File file = new File(path);
            file.mkdirs();
            setReadable(file);

I use the following to make the file readable

            @TargetApi(9)
            private void setReadable(File file) {
                    if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN) {
                            try {
                                    Runtime.getRuntime().exec(
                                                    "chmod 777 " + file.getCanonicalPath());
                            } catch (IOException e1) {
                                    e1.printStackTrace();
                            }
                    } else {
                            file.setReadable(true, false);
                    }
            }
            }

`getFileDir()` returns a `File`. What does that mean when I concat it with other `String`s? — boo-urns, Jan 20 '13 at 06:30

score 0 · Answer 2 · answered Jan 20 '13 at 06:44

0

Try getting your file path as below :

 String fileDirectory=Environment.getExternalStorageDirectory().getAbsolutePath() + File.separator + "data" + File.separator + "data" + File.separator+ getActivity().getPackageName()+ File.separator +"mySubDirectory"+File.separator+"the.zip";

answered Jan 20 '13 at 06:44

GrIsHu

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The OP asked about internal storage - your answer is referring to external storage – galaxigirl Oct 01 '19 at 19:31

score 0 · Accepted Answer · edited May 23 '17 at 10:24

Using this SO question, I created a subdirectory using this example:

File mydir = context.getDir("mydir", Context.MODE_PRIVATE); //Creating an internal dir;
File fileWithinMyDir = new File(mydir, "myfile"); //Getting a file within the dir.
FileOutputStream out = new FileOutputStream(fileWithinMyDir); //Use the stream as usual to write into the file

The problem is that I didn't expect the subdirectory to be prepended with "app_", so I was looking for the zip in the wrong place.

Writing a zip to internal storage -- file doesn't exist after download completion

3 Answers3