Gmail 5.0 app fails with “Permission denied for the attachment” when it receives ACTION_SEND intent

Question

My app creates mails with attachments, and uses an intent with Intent.ACTION_SEND to launch a mail app.

It works with all the mail apps I tested with, e

Answer 1

Use getExternalCacheDir() with File.createTempFile.

Use the following to create a temporary file in the external cache directory:

File tempFile = File.createTempFile("fileName", ".txt", context.getExternalCacheDir());

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Then copy your original file's content to tempFile,

FileWriter fw = new FileWriter(tempFile);

FileReader fr = new FileReader(Data.ERR_BAK_FILE);
int c = fr.read();
while (c != -1) {
    fw.write(c);
    c = fr.read();
}
fr.close();

fw.flush();
fw.close();

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now put your file to intent,

emailIntent.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(tempFile));