TelephonyManager.requestNetworkScan - Android P Preview

[vit...@1-family.net]

Hello!

I'm developing a privileged system app to scan the network.

Trying to use the new API in Android P -  TelephonyManager.requestNetworkScan for this purpose.

For some reason I get error 2 'Wrong parameters' when I try using the API .
Granted the app MODIFY_PHONE_STATE permission, and still get the error.

First thought that it might be an LTE / 3G issue, but I get the same results both for UTRAN & EUTRAN.

I also ruled out SIM issue - the same error happens with 2 different SIMS, both successfully scanning the network form settings app for example.

Trying to run it on Pixel 2, AOSP P release 4 - beta 3 - build: PPP4.180612.004

Here's the relevant extract of the code:

private class RadioCallback extends TelephonyScanManager.NetworkScanCallback {

    private List<CellInfo> mCellInfoResults;
    private int mScanError;

    @Override
    public void onResults(List<CellInfo> cellInfoResults) {
        mCellInfoResults = cellInfoResults;
           ScannerActivity.this.runOnUiThread(new Runnable() {
               @Override
               public void run() {
                   for (CellInfo cellInfo:mCellInfoResults) {
                       resultsTextView.append(" " + cellInfo.toString() + " ");
                   }
               }
           });
    }


    @Override
    public void onError(int error) {
        mScanError = error;
        ScannerActivity.this.runOnUiThread(new Runnable() {
            @Override
            public void run() {
                resultsTextView.append(" Error: " + mScanError);
            }
        });
    }

    @Override
    public void onComplete() {
        ScannerActivity.this.runOnUiThread(new Runnable() {
            @Override
            public void run() {
                resultsTextView.append(" Scan Completed! ");
            }
        });
    }

}

public void onClick(View view) {

    NetworkScanRequest networkScanRequest;
    RadioAccessSpecifier radioAccessSpecifiers[];
    int bands[];
    ArrayList<String> PLMNIds = new ArrayList<String>(Arrays.asList("42501"));


    TelephonyManager telephonyManager = (TelephonyManager) getApplicationContext()
            .getSystemService(Context.TELEPHONY_SERVICE);

    bands[0] = AccessNetworkConstants.UtranBand.BAND_1;
    radioAccessSpecifiers = new RadioAccessSpecifier[1];
    radioAccessSpecifiers[0] = new RadioAccessSpecifier(
            AccessNetworkConstants.AccessNetworkType.UTRAN,
            bands,
            null);

    networkScanRequest = new NetworkScanRequest(
            NetworkScanRequest.SCAN_TYPE_ONE_SHOT,
            radioAccessSpecifiers,
            0,
            60,
            false,
            0,
            PLMNIds);

    telephonyManager.requestNetworkScan(networkScanRequest, AsyncTask.SERIAL_EXECUTOR,new RadioCallback());
}

In logcat's radio buffer I only see the message:
D/TelephonyScanManager( 3634): onError: 2

In main logcat buffer I see:

07-12 14:02:48.348 E/AndroidRuntime(10563): FATAL EXCEPTION: TelephonyScanManager
07-12 14:02:48.348 E/AndroidRuntime(10563): java.lang.RuntimeException: Failed to find NetworkScanInfo with id 10
07-12 14:02:48.348 E/AndroidRuntime(10563):     at android.telephony.TelephonyScanManager$1.handleMessage(TelephonyScanManager.java:117)
07-12 14:02:48.348 E/AndroidRuntime(10563):     at android.os.Handler.dispatchMessage(Handler.java:106)
07-12 14:02:48.348 E/AndroidRuntime(10563):     at android.os.Looper.loop(Looper.java:193)
07-12 14:02:48.348 E/AndroidRuntime(10563):     at android.os.HandlerThread.run(HandlerThread.java:65)

Would appreciate any input!

Vitaliy

[vit...@1-family.net]

OK, figured it out - for anyone who may come across this issue -

searchPeriodicity & incrementalResultsPeriodicity cannot be 0, despite the documentation,
and irrelevance of these parameters for a one shot scan.