Android 3G mobile phone signal Information Acquisition

The mobile phone signal information in androi can be obtained through the TELEPHONY_SERVICE provided by the system.

[Java]
TelephonyManager tel = (TelephonyManager) getSystemService (Context. TELEPHONY_SERVICE );

TelephonyManager can listen to PhoneStateListener, which provides
[Java]
OnSignalStrengthsChanged mobile phone signal change
OnServiceStateChanged mobile service status change

OnSignalStrengthsChanged can obtain the following useful information:
[Java]
/*
SignalStrength. isGsm () whether the GSM signal is 2G or 3G
SignalStrength. getCdmaDbm (); Unicom 3G signal strength
SignalStrength. getcdma ecio (); 3G load ratio of China Unicom
SignalStrength. getEvdoDbm (); Telecom 3G signal strength
SignalStrength. getEvdoEcio (); 3G load ratio of China Telecom
SignalStrength. getEvdoSnr (); 3G signal-to-noise ratio of China Telecom
SignalStrength. getGsmSignalStrength (); 2G signal strength
SignalStrength. getGsmBitErrorRate (); 2G Error Rate
 
Load-to-dry ratio refers to the ratio of signal to noise in simulated radio waves in the air.
*/
The strange thing is that mobile 3G signal TD-SCDMA information can not be obtained

OnServiceStateChanged provides the following status changes:

[Java]
/*
ServiceState. STATE_EMERGENCY_ONLY only for emergency calls
ServiceState. STATE_IN_SERVICE signal normal
ServiceState. STATE_OUT_OF_SERVICE is not in the service area
ServiceState. STATE_POWER_OFF Power Failure
*/

The following are examples:

1. Add a 3G icon and text (activity_g3_example.xml) to the layout file)

[Html]
<LinearLayout xmlns: android = "http://schemas.android.com/apk/res/android"
Xmlns: tools = "http://schemas.android.com/tools"
Android: layout_width = "match_parent"
Android: layout_height = "match_parent"
Android: gravity = "center"
Android: orientation = "vertical">
 
<ImageButton
Android: id = "@ + id/Icon_3GStatus"
Android: layout_width = "wrap_content"
Android: layout_height = "wrap_content"
Android: src = "@ drawable/ic_3g"/>

<TextView
Android: id = "@ + id/Label_3GDetail"
Android: layout_width = "wrap_content"
Android: layout_height = "wrap_content"
Android: maxWidth = "320dp"/>
 
</LinearLayout>

2. Add an optional set of 3G icons and add the ic_3g.xml file to the drawable-hdpi directory. The content is as follows:
[Html]
<? Xml version = "1.0" encoding = "UTF-8"?>
 
<Level-list xmlns: android = "http://schemas.android.com/apk/res/android">
<Item android: maxLevel = "60" android: drawable = "@ drawable/ic_3g_s3"/>
<Item android: maxLevel = "90" android: drawable = "@ drawable/ic_3g_s2"/>
<Item android: maxLevel = "96" android: drawable = "@ drawable/ic_3g_s1"/>
<Item android: maxLevel = "100" android: drawable = "@ drawable/ic_3g_s0"/>
</Level-list>

Note the image to be imported

3. Listen for changes in the cell phone signal and status in the Code (G3Example. java)
[Java]
Package com. example. g3example;
 
Import android. OS. Bundle;
Import android. app. Activity;
Import android. content. Context;
Import android. telephony. PhoneStateListener;
Import android. telephony. ServiceState;
Import android. telephony. SignalStrength;
Import android. telephony. TelephonyManager;
Import android. util. Log;
Import android. view. Menu;
Import android. widget. ImageButton;
Import android. widget. TextView;
 
Public class G3Example extends Activity {
 
Private final String TAG = "G3Example ";
 
Private ImageButton mIcon3G;
Private TextView mLabel3G;
 
@ Override
Public void onCreate (Bundle savedInstanceState ){
Super. onCreate (savedInstanceState );
SetContentView (R. layout. activity_g3_example );
 
MIcon3G = (ImageButton) findViewById (R. id. Icon_3GStatus );
MLabel3G = (TextView) findViewById (R. id. Label_3GDetail );
 
TelephonyManager tel = (TelephonyManager) getSystemService (Context. TELEPHONY_SERVICE );
Tel. listen (new PhoneStateMonitor (), PhoneStateListener. LISTEN_SIGNAL_STRENGTHS | PhoneStateListener. LISTEN_SERVICE_STATE );
}
 
@ Override
Public boolean onCreateOptionsMenu (Menu menu ){
GetMenuInflater (). inflate (R. menu. activity_g3_example, menu );
Return true;
}
 
Public class PhoneStateMonitor extends PhoneStateListener {
Public void onSignalStrengthsChanged (SignalStrength signalStrength ){
Super. onSignalStrengthsChanged (signalStrength );
/*
SignalStrength. isGsm () whether the GSM signal is 2G or 3G
SignalStrength. getCdmaDbm (); Unicom 3G signal strength
SignalStrength. getcdma ecio (); 3G load ratio of China Unicom
SignalStrength. getEvdoDbm (); Telecom 3G signal strength
SignalStrength. getEvdoEcio (); 3G load ratio of China Telecom
SignalStrength. getEvdoSnr (); 3G signal-to-noise ratio of China Telecom
SignalStrength. getGsmSignalStrength (); 2G signal strength
SignalStrength. getGsmBitErrorRate (); 2G Error Rate
 
Load-to-dry ratio refers to the ratio of signal to noise in simulated radio waves in the air.
*/
MLabel3G. setText ("IsGsm:" + signalStrength. isGsm () +
"\ NCDMA Dbm:" + signalStrength. getCdmaDbm () + "Dbm" +
"\ NCDMA Ecio:" + signalStrength. getcdma Ecio () + "dB * 10" +
"\ NEvdo Dbm:" + signalStrength. getEvdoDbm () + "Dbm" +
"\ NEvdo Ecio:" + signalStrength. getEvdoEcio () + "dB * 10" +
"\ NGsm SignalStrength:" + signalStrength. getGsmSignalStrength () +
"\ NGsm BitErrorRate:" + signalStrength. getGsmBitErrorRate ());
 
MIcon3G. setImageLevel (Math. abs (signalStrength. getGsmSignalStrength ()));
}
 
Public void onServiceStateChanged (ServiceState serviceState ){
Super. onServiceStateChanged (serviceState );
 
/*
ServiceState. STATE_EMERGENCY_ONLY only for emergency calls
ServiceState. STATE_IN_SERVICE signal normal
ServiceState. STATE_OUT_OF_SERVICE is not in the service area
ServiceState. STATE_POWER_OFF Power Failure
*/
Switch (serviceState. getState ())
{
Case ServiceState. STATE_EMERGENCY_ONLY:
Log. d (TAG, "3g status: STATE_EMERGENCY_ONLY ");
Break;
Case ServiceState. STATE_IN_SERVICE:
Log. d (TAG, "3g status: STATE_IN_SERVICE ");
Break;
Case ServiceState. STATE_OUT_OF_SERVICE:
Log. d (TAG, "3g status: STATE_OUT_OF_SERVICE ");
Break;
Case ServiceState. STATE_POWER_OFF:
Log. d (TAG, "3g status: STATE_POWER_OFF ");
Break;
Default:
Break;
}
}
}
}

4. Added support for obtaining mobile phone signals in AndroidManifest. xml.

[Html] view plaincopy
<Uses-permission android: name = "android. permission. ACCESS_NETWORK_STATE"/>