TelephonyManager Tutorial
The android.telephony.TelephonyManager class provides information about the telephony services such as subscriber id, sim serial number, phone network type etc. Moreover, you can determine the phone state etc.
Android TelephonyManager Example
Let's see the simple example of TelephonyManager that prints information of the telephony services.
activity_main.xml
Drag one textview from the pallete, now the xml file will look like this.
File: activity_main.xml
<RelativeLayout xmlns:androclass="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:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="38dp"
android:layout_marginTop="30dp"
android:text="Phone Details:" />
</RelativeLayout>
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="38dp"
android:layout_marginTop="30dp"
android:text="Phone Details:" />
</RelativeLayout>
Activity class
Now, write the code to display the information about the telephony services.
File: MainActivity.java
package com.javatpoint.telephonymanager;
import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.telephony.TelephonyManager;
import android.view.Menu;
import android.widget.TextView;
public class MainActivity extends Activity {
TextView textView1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textView1=(TextView)findViewById(R.id.textView1);
//Get the instance of TelephonyManager
TelephonyManager tm=(TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE);
//Calling the methods of TelephonyManager the returns the information
String IMEINumber=tm.getDeviceId();
String subscriberID=tm.getDeviceId();
String SIMSerialNumber=tm.getSimSerialNumber();
String networkCountryISO=tm.getNetworkCountryIso();
String SIMCountryISO=tm.getSimCountryIso();
String softwareVersion=tm.getDeviceSoftwareVersion();
String voiceMailNumber=tm.getVoiceMailNumber();
//Get the phone type
String strphoneType="";
int phoneType=tm.getPhoneType();
switch (phoneType)
{
case (TelephonyManager.PHONE_TYPE_CDMA):
strphoneType="CDMA";
break;
case (TelephonyManager.PHONE_TYPE_GSM):
strphoneType="GSM";
break;
case (TelephonyManager.PHONE_TYPE_NONE):
strphoneType="NONE";
break;
}
//getting information if phone is in roaming
boolean isRoaming=tm.isNetworkRoaming();
String info="Phone Details:\n";
info+="\n IMEI Number:"+IMEINumber;
info+="\n SubscriberID:"+subscriberID;
info+="\n Sim Serial Number:"+SIMSerialNumber;
info+="\n Network Country ISO:"+networkCountryISO;
info+="\n SIM Country ISO:"+SIMCountryISO;
info+="\n Software Version:"+softwareVersion;
info+="\n Voice Mail Number:"+voiceMailNumber;
info+="\n Phone Network Type:"+strphoneType;
info+="\n In Roaming? :"+isRoaming;
textView1.setText(info);//displaying the information in the textView
}
}
import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.telephony.TelephonyManager;
import android.view.Menu;
import android.widget.TextView;
public class MainActivity extends Activity {
TextView textView1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textView1=(TextView)findViewById(R.id.textView1);
//Get the instance of TelephonyManager
TelephonyManager tm=(TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE);
//Calling the methods of TelephonyManager the returns the information
String IMEINumber=tm.getDeviceId();
String subscriberID=tm.getDeviceId();
String SIMSerialNumber=tm.getSimSerialNumber();
String networkCountryISO=tm.getNetworkCountryIso();
String SIMCountryISO=tm.getSimCountryIso();
String softwareVersion=tm.getDeviceSoftwareVersion();
String voiceMailNumber=tm.getVoiceMailNumber();
//Get the phone type
String strphoneType="";
int phoneType=tm.getPhoneType();
switch (phoneType)
{
case (TelephonyManager.PHONE_TYPE_CDMA):
strphoneType="CDMA";
break;
case (TelephonyManager.PHONE_TYPE_GSM):
strphoneType="GSM";
break;
case (TelephonyManager.PHONE_TYPE_NONE):
strphoneType="NONE";
break;
}
//getting information if phone is in roaming
boolean isRoaming=tm.isNetworkRoaming();
String info="Phone Details:\n";
info+="\n IMEI Number:"+IMEINumber;
info+="\n SubscriberID:"+subscriberID;
info+="\n Sim Serial Number:"+SIMSerialNumber;
info+="\n Network Country ISO:"+networkCountryISO;
info+="\n SIM Country ISO:"+SIMCountryISO;
info+="\n Software Version:"+softwareVersion;
info+="\n Voice Mail Number:"+voiceMailNumber;
info+="\n Phone Network Type:"+strphoneType;
info+="\n In Roaming? :"+isRoaming;
textView1.setText(info);//displaying the information in the textView
}
}
AndroidManifest.xml
You need to provide READ_PHONE_STATE permission in the AndroidManifest.xml file.
File: AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:androclass="http://schemas.android.com/apk/res/android"
package="com.javatpoint.telephonymanager"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<uses-permission android:name="android.permission.READ_PHONE_STATE"/>
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.javatpoint.telephonymanager.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
<manifest xmlns:androclass="http://schemas.android.com/apk/res/android"
package="com.javatpoint.telephonymanager"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<uses-permission android:name="android.permission.READ_PHONE_STATE"/>
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.javatpoint.telephonymanager.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
Output:
