upload_anr.java

for (ApplicationExitInfo exitInfo: unprocessedExitInfos) {
    if (exitInfo.getReason() == ApplicationExitInfo.REASON_ANR) {
        UUID uuid = UUID.randomUUID();
        String fileName = "anr_info_" + uuid.toString() + ".trace";
        File outFile = new File(getFilesDir().getAbsolutePath() + "/" + fileName);

        try (InputStream inputStream = exitInfo.getTraceInputStream()) {
            copyStreamToFile(inputStream, outFile);
        } catch (IOException e) {
            Log.e(TAG, "copyStreamToFile: ", e);
        }

        // upload the file to server
    }
}