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termux-telephony-cellinfo: return empty array if not allowed to read …
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…Cell Info

Fixes #363.

On Android 10/Q we should be able to get a cached CellInfo as
stated in https://developer.android.com/reference/android/telephony/TelephonyManager#getAllCellInfo().
We may try to use that later to recover termux-telephony-cellinfo on SDK 29.
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Leonid Pliushch committed Sep 30, 2020
1 parent 19229ad commit 67954de
Showing 1 changed file with 79 additions and 66 deletions.
145 changes: 79 additions & 66 deletions app/src/main/java/com/termux/api/TelephonyAPI.java
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Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,8 @@

import java.io.IOException;

import java.util.List;

/**
* Exposing {@link android.telephony.TelephonyManager}.
*/
Expand All @@ -34,73 +36,84 @@ public void writeJson(JsonWriter out) throws Exception {
TelephonyManager manager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
out.beginArray();

for (CellInfo cellInfo : manager.getAllCellInfo()) {
out.beginObject();
if (cellInfo instanceof CellInfoGsm) {
CellInfoGsm gsmInfo = (CellInfoGsm) cellInfo;
out.name("type").value("gsm");
out.name("registered").value(cellInfo.isRegistered());

out.name("asu").value(gsmInfo.getCellSignalStrength().getAsuLevel());
writeIfKnown(out, "dbm", gsmInfo.getCellSignalStrength().getDbm());
out.name("level").value(gsmInfo.getCellSignalStrength().getLevel());

writeIfKnown(out, "cid", gsmInfo.getCellIdentity().getCid());
writeIfKnown(out, "lac", gsmInfo.getCellIdentity().getLac());
writeIfKnown(out, "mcc", gsmInfo.getCellIdentity().getMcc());
writeIfKnown(out, "mnc", gsmInfo.getCellIdentity().getMnc());
} else if (cellInfo instanceof CellInfoLte) {
CellInfoLte lteInfo = (CellInfoLte) cellInfo;
out.name("type").value("lte");
out.name("registered").value(cellInfo.isRegistered());

out.name("asu").value(lteInfo.getCellSignalStrength().getAsuLevel());
out.name("dbm").value(lteInfo.getCellSignalStrength().getDbm());
writeIfKnown(out, "level", lteInfo.getCellSignalStrength().getLevel());
writeIfKnown(out, "timing_advance", lteInfo.getCellSignalStrength().getTimingAdvance());

writeIfKnown(out, "ci", lteInfo.getCellIdentity().getCi());
writeIfKnown(out, "pci", lteInfo.getCellIdentity().getPci());
writeIfKnown(out, "tac", lteInfo.getCellIdentity().getTac());
writeIfKnown(out, "mcc", lteInfo.getCellIdentity().getMcc());
writeIfKnown(out, "mnc", lteInfo.getCellIdentity().getMnc());
} else if (cellInfo instanceof CellInfoCdma) {
CellInfoCdma cdmaInfo = (CellInfoCdma) cellInfo;
out.name("type").value("cdma");
out.name("registered").value(cellInfo.isRegistered());

out.name("asu").value(cdmaInfo.getCellSignalStrength().getAsuLevel());
out.name("dbm").value(cdmaInfo.getCellSignalStrength().getDbm());
out.name("level").value(cdmaInfo.getCellSignalStrength().getLevel());
out.name("cdma_dbm").value(cdmaInfo.getCellSignalStrength().getCdmaDbm());
out.name("cdma_ecio").value(cdmaInfo.getCellSignalStrength().getCdmaEcio());
out.name("cdma_level").value(cdmaInfo.getCellSignalStrength().getCdmaLevel());
out.name("evdo_dbm").value(cdmaInfo.getCellSignalStrength().getEvdoDbm());
out.name("evdo_ecio").value(cdmaInfo.getCellSignalStrength().getEvdoEcio());
out.name("evdo_level").value(cdmaInfo.getCellSignalStrength().getEvdoLevel());
out.name("evdo_snr").value(cdmaInfo.getCellSignalStrength().getEvdoSnr());

out.name("basestation").value(cdmaInfo.getCellIdentity().getBasestationId());
out.name("latitude").value(cdmaInfo.getCellIdentity().getLatitude());
out.name("longitude").value(cdmaInfo.getCellIdentity().getLongitude());
out.name("network").value(cdmaInfo.getCellIdentity().getNetworkId());
out.name("system").value(cdmaInfo.getCellIdentity().getSystemId());
} else if (cellInfo instanceof CellInfoWcdma) {
CellInfoWcdma wcdmaInfo = (CellInfoWcdma) cellInfo;
out.name("type").value("wcdma");
out.name("registered").value(cellInfo.isRegistered());

out.name("asu").value(wcdmaInfo.getCellSignalStrength().getAsuLevel());
writeIfKnown(out, "dbm", wcdmaInfo.getCellSignalStrength().getDbm());
out.name("level").value(wcdmaInfo.getCellSignalStrength().getLevel());

writeIfKnown(out, "cid", wcdmaInfo.getCellIdentity().getCid());
writeIfKnown(out, "lac", wcdmaInfo.getCellIdentity().getLac());
writeIfKnown(out, "mcc", wcdmaInfo.getCellIdentity().getMcc());
writeIfKnown(out, "mnc", wcdmaInfo.getCellIdentity().getMnc());
writeIfKnown(out, "psc", wcdmaInfo.getCellIdentity().getPsc());
List<CellInfo> cellInfoData = null;

try {
cellInfoData = manager.getAllCellInfo();
} catch (SecurityException e) {
// Direct call of getAllCellInfo() doesn't work on Android 10 (Q).
// https://developer.android.com/reference/android/telephony/TelephonyManager#getAllCellInfo().
}

if (cellInfoData != null) {
for (CellInfo cellInfo : cellInfoData) {
out.beginObject();
if (cellInfo instanceof CellInfoGsm) {
CellInfoGsm gsmInfo = (CellInfoGsm) cellInfo;
out.name("type").value("gsm");
out.name("registered").value(cellInfo.isRegistered());

out.name("asu").value(gsmInfo.getCellSignalStrength().getAsuLevel());
writeIfKnown(out, "dbm", gsmInfo.getCellSignalStrength().getDbm());
out.name("level").value(gsmInfo.getCellSignalStrength().getLevel());

writeIfKnown(out, "cid", gsmInfo.getCellIdentity().getCid());
writeIfKnown(out, "lac", gsmInfo.getCellIdentity().getLac());
writeIfKnown(out, "mcc", gsmInfo.getCellIdentity().getMcc());
writeIfKnown(out, "mnc", gsmInfo.getCellIdentity().getMnc());
} else if (cellInfo instanceof CellInfoLte) {
CellInfoLte lteInfo = (CellInfoLte) cellInfo;
out.name("type").value("lte");
out.name("registered").value(cellInfo.isRegistered());

out.name("asu").value(lteInfo.getCellSignalStrength().getAsuLevel());
out.name("dbm").value(lteInfo.getCellSignalStrength().getDbm());
writeIfKnown(out, "level", lteInfo.getCellSignalStrength().getLevel());
writeIfKnown(out, "timing_advance", lteInfo.getCellSignalStrength().getTimingAdvance());

writeIfKnown(out, "ci", lteInfo.getCellIdentity().getCi());
writeIfKnown(out, "pci", lteInfo.getCellIdentity().getPci());
writeIfKnown(out, "tac", lteInfo.getCellIdentity().getTac());
writeIfKnown(out, "mcc", lteInfo.getCellIdentity().getMcc());
writeIfKnown(out, "mnc", lteInfo.getCellIdentity().getMnc());
} else if (cellInfo instanceof CellInfoCdma) {
CellInfoCdma cdmaInfo = (CellInfoCdma) cellInfo;
out.name("type").value("cdma");
out.name("registered").value(cellInfo.isRegistered());

out.name("asu").value(cdmaInfo.getCellSignalStrength().getAsuLevel());
out.name("dbm").value(cdmaInfo.getCellSignalStrength().getDbm());
out.name("level").value(cdmaInfo.getCellSignalStrength().getLevel());
out.name("cdma_dbm").value(cdmaInfo.getCellSignalStrength().getCdmaDbm());
out.name("cdma_ecio").value(cdmaInfo.getCellSignalStrength().getCdmaEcio());
out.name("cdma_level").value(cdmaInfo.getCellSignalStrength().getCdmaLevel());
out.name("evdo_dbm").value(cdmaInfo.getCellSignalStrength().getEvdoDbm());
out.name("evdo_ecio").value(cdmaInfo.getCellSignalStrength().getEvdoEcio());
out.name("evdo_level").value(cdmaInfo.getCellSignalStrength().getEvdoLevel());
out.name("evdo_snr").value(cdmaInfo.getCellSignalStrength().getEvdoSnr());

out.name("basestation").value(cdmaInfo.getCellIdentity().getBasestationId());
out.name("latitude").value(cdmaInfo.getCellIdentity().getLatitude());
out.name("longitude").value(cdmaInfo.getCellIdentity().getLongitude());
out.name("network").value(cdmaInfo.getCellIdentity().getNetworkId());
out.name("system").value(cdmaInfo.getCellIdentity().getSystemId());
} else if (cellInfo instanceof CellInfoWcdma) {
CellInfoWcdma wcdmaInfo = (CellInfoWcdma) cellInfo;
out.name("type").value("wcdma");
out.name("registered").value(cellInfo.isRegistered());

out.name("asu").value(wcdmaInfo.getCellSignalStrength().getAsuLevel());
writeIfKnown(out, "dbm", wcdmaInfo.getCellSignalStrength().getDbm());
out.name("level").value(wcdmaInfo.getCellSignalStrength().getLevel());

writeIfKnown(out, "cid", wcdmaInfo.getCellIdentity().getCid());
writeIfKnown(out, "lac", wcdmaInfo.getCellIdentity().getLac());
writeIfKnown(out, "mcc", wcdmaInfo.getCellIdentity().getMcc());
writeIfKnown(out, "mnc", wcdmaInfo.getCellIdentity().getMnc());
writeIfKnown(out, "psc", wcdmaInfo.getCellIdentity().getPsc());
}
out.endObject();
}
out.endObject();
}

out.endArray();
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