Problems with saving Signal Strength of current cell in android

Question

I'm trying to get the get the signal strength of the current cell that I'm connected to. So far, I've found this example:

http://www.android10.org/index.php/forums/44-maplocation/868-tutorialget-gsm-signal

But that is only to get a Toast when the signal is changed. Is there any way to save the value of the signal strength in a variable?

I tried this with the following code, by saving the value on a variable and getting it, but I keep getting the "initial value". Here's the code:

package org.mode.gsm;

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.telephony.PhoneStateListener;
import android.telephony.SignalStrength;
import android.telephony.TelephonyManager;
import android.widget.TextView;
import android.widget.Toast;

public class GetGsmSignalStrength extends Activity {

    TelephonyManager Tel;
    MyPhoneStateListener MyListener;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        TextView abcd = new TextView(this);
        abcd.setText(getRSSI());
        setContentView(abcd);
    }

    public String getRSSI() {
        MyListener = new MyPhoneStateListener();
        Context context = (Context) getApplicationContext();
        Tel = (TelephonyManager) context
                .getSystemService(Context.TELEPHONY_SERVICE);
        Tel.listen(MyListener, PhoneStateListener.LISTEN_SIGNAL_STRENGTHS);
        String GSMCinr = "GSM CINR = " + MyListener.getCinr();
        return GSMCinr;
    }

    private class MyPhoneStateListener extends PhoneStateListener {

        String cinr = "initial value";

        @Override
        public void onSignalStrengthsChanged(SignalStrength signalStrength) {
            super.onSignalStrengthsChanged(signalStrength);
            cinr = String.valueOf(signalStrength.getGsmSignalStrength());
            Toast.makeText(
                    getApplicationContext(),
                    "GSM Cinr = "
                            + String.valueOf(signalStrength
                                .getGsmSignalStrength()), Toast.LENGTH_LONG)
                    .show();
        }

        public String getCinr() {
            return cinr;
        }
    }
}

And the manifest:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="org.mode.gsm"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="7" />

    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
    <uses-permission android:name="android.permission.READ_PHONE_STATE"/>
    <uses-permission android:name="android.permission.ACCESS_COARSE_UPDATES" />

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:label="@string/app_name"
            android:name=".GetGsmSignalStrength" >
            <intent-filter >
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
         </activity>
    </application>

</manifest>

I would really appreciate it if anyone could help me save the value of the Signal Strength, or suggest any other way to do it...

Thanks

Answer 1

GetRssi listener = new GetRssi();
protected int Rssi;
Rssi = 99;

private class GetRssi extends PhoneStateListener 
{
    @Override  
    public void onSignalStrengthsChanged(SignalStrength signalStrength)
    {
         super.onSignalStrengthsChanged(signalStrength);
         Rssi  = signalStrength.getGsmSignalStrength();
    }
    }

Rssi was declared in interger; So after you can create a function (String) which return ""+Rssi like that

public String getRssi(){
        return ""+Rssi;
}

You have to convert the value in dBm. Hope that will help!!!