我正在开发一个特权系统应用程序来扫描网络。执行 API 后,结果不包含有效的小区身份信息。所有值都返回为 0、null 或 max int。
授予相关系统特权权限。
代码摘录:
public class ScannerActivity extends Activity implements View.OnClickListener {
private final int PHONE_STATE_REQUEST = 1;
private Button scanButton;
private TextView resultsTextView;
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! ");
}
});
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_scanner);
scanButton = (Button) findViewById(R.id.scan_button);
scanButton.setOnClickListener(this);
resultsTextView = (TextView) findViewById(R.id.results_text_view);
}
public void onClick(View view) {
NetworkScanRequest networkScanRequest;
RadioAccessSpecifier radioAccessSpecifiers[];
TelephonyManager telephonyManager = (TelephonyManager) getApplicationContext()
.getSystemService(Context.TELEPHONY_SERVICE);
radioAccessSpecifiers = new RadioAccessSpecifier[1];
radioAccessSpecifiers[0] = new RadioAccessSpecifier(
AccessNetworkConstants.AccessNetworkType.UTRAN,
null,
null);
networkScanRequest = new NetworkScanRequest(
NetworkScanRequest.SCAN_TYPE_ONE_SHOT,
radioAccessSpecifiers,
30,
300,
true,
3,
null);
telephonyManager.requestNetworkScan(networkScanRequest, AsyncTask.SERIAL_EXECUTOR,new RadioCallback());
}
知道为什么会这样吗?在 Pixel 2 上试过。