CODEWITHSUNDEEP
androidandroid-sdcardfileoutputstream
Raj
Raj

Reputation: 2398

Unable to write Bitmap into SD Card

I am trying to write a Bitmap into SD Card(as Png file), Find below the Code

File file = new File(getExternalFilesDir(null), "DemoFile.png");
OutputStream os = new FileOutputStream(file);
Log.d("JS", "File name -> " + file.getAbsolutePath());
//File name -> /mnt/sdcard/Android/data/com.pocmodule/files/DemoFile.png
bmp.compress(Bitmap.CompressFormat.PNG, 90, os); //here bmp is of type 'Bitmap'
os.close();

But I do not see the file 'DemoFile.png' being created in SD Card. Let alone the Png File, I do not even see the directory 'com.pocmodule' available in the SD Card.

Am I missing anything in my code?

Upvotes: 1

Views: 236

Answers (2)

Raj
Raj

Reputation: 2398

Thanks @CommonsWare for the help. I finally have the Png file available in SD Card :). For anyone who wants to know the working code, Please find below

File file = new File(getExternalFilesDir(null), "DemoFile.png");
FileOutputStream os = new FileOutputStream(file);
    Log.d("JS", "File name -> " + file.getAbsolutePath());
    //Here 'bmp' is of type Bitmap
    bmp.compress(Bitmap.CompressFormat.PNG, 90, os); 
    os.flush();
    os.getFD().sync();
    os.close();

    MediaScannerConnection.scanFile(this,
            new String[]{file.toString()}, null,
            new MediaScannerConnection.OnScanCompletedListener() {
                public void onScanCompleted(String path, Uri uri) {
                    Log.i("ExternalStorage", "Scanned " + path + ":");
                    Log.i("ExternalStorage", "-> uri=" + uri);
                }
            });

Upvotes: 1

CommonsWare
CommonsWare

Reputation: 1007494

I mount my Device(with USB debugging mode selected) and explored the directory

That does not explore the filesystem. It explores what is known to MediaStore.

So, first, call flush(), then getFD().sync(), on your FileOutputStream before you call close() on it, to ensure that all bytes are written to disk.

Then, use MediaScannerConnection and scanFile() to teach MediaStore about your file.

This may still require you to do some sort of "refresh" in your desktop OS's file explorer window to see the change, or possibly even unplug and re-plug in your device, due to the desktop OS possibly caching "directory" contents.

Upvotes: 2

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