How do I programmatically show data usage of all applications?

Question

On Android 4.0 onwards we have data usage control options in the phone. Please check the attached screen shot for further understanding.

http://developer.android.com

Answer 1

The solution from Arunendra, dated 2015, didn't immediately work for me on SDK 28 (Pie).

So I modified as follows:

void networkUsage() {
    // Get running processes
    ActivityManager manager = (ActivityManager) getSystemService(ACTIVITY_SERVICE);
    List runningApps = manager.getRunningAppProcesses();
    for (ActivityManager.RunningAppProcessInfo runningApp : runningApps) {
        long received = TrafficStats.getUidRxBytes(runningApp.uid);
        long sent = TrafficStats.getUidTxBytes(runningApp.uid);
        Log.d(LOG_TAG, String.format(Locale.getDefault(), 
                "uid: %1d - name: %s: Sent = %1d, Rcvd = %1d", runningApp.uid, runningApp.processName, sent, received));
    }
}