在dbm中获取SignalStrength

Question

我想展示dbm的信号强度。但用我的代码，我总是成为结果-1。但当我看到设置中的信号强度是-81.你能发现一个错误吗？谢谢!

public class MainActivity extends Activity implements OnClickListener {
    TextView dateAndTimeLabel;
    private int signalDBM = 0;

    public class GetParams extends PhoneStateListener {
        @Override  
        public void onSignalStrengthsChanged(SignalStrength signalStrength) {
            super.onSignalStrengthsChanged(signalStrength);
            signalDBM = signalStrength.getEvdoDbm();
        }
    }

    @Override
    public void onCreate(Bundle icicle) {
        super.onCreate(icicle);
        setContentView(R.layout.main);

        GetParams listener = new GetParams();
        TelephonyManager TelManager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
        TelManager.listen(listener ,PhoneStateListener.LISTEN_SIGNAL_STRENGTHS);

        Button btn = (Button)findViewById(R.id.start);
        btn.setOnClickListener(this);             
    }

    public void onClick(View v) {
        Toast.makeText(this, "CDMA signal strength is " + this.signalDBM, Toast.LENGTH_SHORT).show();               
    }

    /* Create options menu etc*/
}

Answer 1

试试这个：

list cellInfoList = tm.getAllCellInfo()；//检查列表值是否为空if (cellInfoList != null) { for (最终CellInfo info : cellInfoList) { if (info instanceof CellInfoGsm) { //GSM网络CellSignalStrengthGsm cellSignalStrength = ((CellInfoGsm)info).getCellSignalStrength()；dBmlevel = cellSignalStrength.getDbm()；asulevel = cellSignalStrength.getAsuLevel()；} if (info instanceof CellInfoCdma) { //CDMA网络CellSignalStrengthCdma cellSignalStrength = ((CellInfoCdma)info).getCellSignalStrength()；dBmlevel = cellSignalStrength.getDbm()；asulevel = cellSignalStrength.getAsuLevel()；} if (info instanceof CellInfoLte) { //LTE cellSignalStrength = ((CellInfoLte)info).getCellSignalStrength()；dBmlevel = cellSignalStrength.getDbm()；asulevel = cellSignalStrength.getAsuLevel()；} if (info instanceof CellInfoWcdma) { //WCDMA网络CellSignalStrengthWcdma cellSignalStrength =cellSignalStrength.getAsuLeveldBmlevel = cellSignalStrength.getDbm()；asulevel = cellSignalStrength.getAsuLevel()；} callbackContext {//开发为Cordova插件，这就是为什么我使用callbackContext callbackContext.error(“未知类型的细胞信号”)；}}

如果你的手机是三星，它将返回0 dBm，0 asu。如果没有，那么它应该可以工作(它在我的Xperia M2 Aqua中有效)。