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My Life with Android

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Android 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.
File: activity_main.xml


<RelativeLayout 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: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>

Now, write the code to display the information about the telephony services.
File: MainActivity.java


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>

OUTPUT :

How to make a phone call in android

We are able to make a phone call in android via intent. You need to write only three lines of code to make a phone call.
Android provides Built-in applications for phone calls, in some occasions we may need to make a phone call through our application. This could easily be done by using implicit Intent with appropriate actions.

Intent Object - Action to make Phone Call
You will use ACTION_CALL action to trigger built-in phone call functionality available in Android device.

Intent phoneIntent = new Intent(Intent.ACTION_CALL);
To make a phone call at a given number 91-000-000-0000, you need to specify tel: as URI using setData() method as follows
phoneIntent.setData(Uri.parse("tel:91-000-000-0000"));


Intent callIntent = new Intent(Intent.ACTION_CALL);  
callIntent.setData(Uri.parse("tel:8465984320"));//change the number  
startActivity(callIntent);

Example of phone call in android

File: activity_main.xml


<RelativeLayout 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"  
    tools:context=".MainActivity" >  
  
    <Button  
        android:id="@+id/button1"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:layout_alignParentTop="true"  
        android:layout_centerHorizontal="true"  
        android:layout_marginTop="118dp"  
        android:text="Call" />  
  
    <EditText  
        android:id="@+id/editText1"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:layout_alignParentTop="true"  
        android:layout_centerHorizontal="true"  
        android:layout_marginTop="25dp"  
        android:ems="10" />  
  
</RelativeLayout>

Write the permission code in Android-Manifest.xml file
You need to write CALL_PHONE permission as given below:

<uses-permission android:name="android.permission.CALL_PHONE" />

File: Android-Manifest.xml


<?xml version="1.0" encoding="utf-8"?>  
  
<manifest xmlns:androclass="http://schemas.android.com/apk/res/android"  
    package="com.example.phonecall"  
    android:versionCode="1"  
    android:versionName="1.0" >  
  
    <uses-sdk  
        android:minSdkVersion="8"  
        android:targetSdkVersion="16" />  
  
    <uses-permission android:name="android.permission.CALL_PHONE" />  
    <application  
        android:allowBackup="true"  
        android:icon="@drawable/ic_launcher"  
        android:label="@string/app_name"  
        android:theme="@style/AppTheme" >  
        <activity  
            android:name="com.example.phonecall.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>

File: MainActivity.java


import android.net.Uri;  
import android.os.Bundle;  
import android.app.Activity;  
import android.content.Intent;  
import android.view.Menu;  
import android.view.View;  
import android.view.View.OnClickListener;  
import android.widget.Button;  
import android.widget.EditText;  
  
public class MainActivity extends Activity {  
    EditText edittext1;  
    Button button1;  
    @Override  
    protected void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.activity_main);  
  
        //Getting the edittext and button instance  
        edittext1=(EditText)findViewById(R.id.editText1);  
        button1=(Button)findViewById(R.id.button1);  
  
        //Performing action on button click  
        button1.setOnClickListener(new OnClickListener(){  
  
            @Override  
            public void onClick(View arg0) {  
                String number=edittext1.getText().toString();  
                Intent callIntent = new Intent(Intent.ACTION_CALL);  
                callIntent.setData(Uri.parse("tel:"+number));  
                startActivity(callIntent);  
            }  
              
        });  
    }  
  
    @Override  
    public boolean onCreateOptionsMenu(Menu menu) {  
        // Inflate the menu; this adds items to the action bar if it is present.  
        getMenuInflater().inflate(R.menu.activity_main, menu);  
        return true;  
    }  
      
}

OUTPUT :

How to send sms in android

We can send sms in android via intent. You need to write only 4 lines of code the send sms in android.


//Getting intent and PendingIntent instance  
Intent intent=new Intent(getApplicationContext(),MainActivity.class);  
PendingIntent pi=PendingIntent.getActivity(getApplicationContext(), 0, intent,0);  
  
//Get the SmsManager instance and call the sendTextMessage method to send message                 
SmsManager sms=SmsManager.getDefault();  
sms.sendTextMessage("8465984320", null, "hello javatpoint", pi,null);

Example of sending sms in android

File: activity_main.xml


<RelativeLayout 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"  
    tools:context=".MainActivity" >  
  
    <EditText  
        android:id="@+id/editText1"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:layout_alignParentRight="true"  
        android:layout_alignParentTop="true"  
        android:layout_marginRight="20dp"  
        android:ems="10" />  
  
    <EditText  
        android:id="@+id/editText2"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:layout_alignLeft="@+id/editText1"  
        android:layout_below="@+id/editText1"  
        android:layout_marginTop="26dp"  
        android:ems="10"  
        android:inputType="textMultiLine" />  
  
    <TextView  
        android:id="@+id/textView1"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:layout_alignBaseline="@+id/editText1"  
        android:layout_alignBottom="@+id/editText1"  
        android:layout_toLeftOf="@+id/editText1"  
        android:text="Mobile No:" />  
  
    <TextView  
        android:id="@+id/textView2"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:layout_alignBaseline="@+id/editText2"  
        android:layout_alignBottom="@+id/editText2"  
        android:layout_alignLeft="@+id/textView1"  
        android:text="Message:" />  
  
    <Button  
        android:id="@+id/button1"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:layout_alignLeft="@+id/editText2"  
        android:layout_below="@+id/editText2"  
        android:layout_marginLeft="34dp"  
        android:layout_marginTop="48dp"  
        android:text="Send SMS" />  
  
</RelativeLayout>

Write the permission code in Android-Manifest.xml file

You need to write SEND_SMS permission as given below:

<uses-permission android:name="android.permission.SEND_SMS"/>

File: Android-Manifest.xml


<?xml version="1.0" encoding="utf-8"?>  
<manifest   
xmlns:androclass="http://schemas.android.com/apk/res/android"  
    package="com.example.sendsms"  
    android:versionCode="1"  
    android:versionName="1.0" >  
  
    <uses-sdk  
        android:minSdkVersion="8"  
        android:targetSdkVersion="16" />  
  
    <uses-permission android:name="android.permission.SEND_SMS"/>  
    
    <uses-permission android:name="android.permission.RECEIVE_SMS"/>  
  
    <application  
        android:allowBackup="true"  
        android:icon="@drawable/ic_launcher"  
        android:label="@string/app_name"  
        android:theme="@style/AppTheme" >  
        <activity  
            android:name="com.example.sendsms.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>

Let's write the code to make the phone call via intent.
File: MainActivity.java


import android.os.Bundle;  
import android.app.Activity;  
import android.app.PendingIntent;  
import android.content.Intent;  
import android.telephony.SmsManager;  
import android.view.Menu;  
import android.view.View;  
import android.view.View.OnClickListener;  
import android.widget.Button;  
import android.widget.EditText;  
import android.widget.Toast;  
  
public class MainActivity extends Activity {  
  
    EditText mobileno,message;  
    Button sendsms;  
    @Override  
    protected void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.activity_main);  
          
        mobileno=(EditText)findViewById(R.id.editText1);  
        message=(EditText)findViewById(R.id.editText2);  
        sendsms=(Button)findViewById(R.id.button1);  
          
    //Performing action on button click  
        sendsms.setOnClickListener(new OnClickListener() {  
              
            @Override  
            public void onClick(View arg0) {  
                String no=mobileno.getText().toString();  
                String msg=message.getText().toString();  
                  
                //Getting intent and PendingIntent instance  
                Intent intent=new Intent(getApplicationContext(),MainActivity.class);  
                PendingIntent pi=PendingIntent.getActivity(getApplicationContext(), 0, intent,0);  
                  
                //Get the SmsManager instance and call the sendTextMessage method to send message  
                SmsManager sms=SmsManager.getDefault();  
                sms.sendTextMessage(no, null, msg, pi,null);  
                  
                Toast.makeText(getApplicationContext(), "Message Sent successfully!",  
                    Toast.LENGTH_LONG).show();  
            }  
        });  
    }  
  
    @Override  
    public boolean onCreateOptionsMenu(Menu menu) {  
        // Inflate the menu; this adds items to the action bar if it is present.  
        getMenuInflater().inflate(R.menu.activity_main, menu);  
        return true;  
    }  
      
}

OUTPUT :

How to send email in android using intent

We can easily send email in android via intent. You need to write few lines of code only as given below


Intent email = new Intent(Intent.ACTION_SEND);  
email.putExtra(Intent.EXTRA_EMAIL, new String[]{ to});  
email.putExtra(Intent.EXTRA_SUBJECT, subject);  
email.putExtra(Intent.EXTRA_TEXT, message);  
       
//need this to prompts email client only  
email.setType("message/rfc822");  
  
startActivity(Intent.createChooser(email, "Choose an Email client :"));

Example of phone call in android

File: activity_main.xml


<RelativeLayout 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"  
    tools:context=".MainActivity" >  
  
    <EditText  
        android:id="@+id/editText1"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:layout_alignParentRight="true"  
        android:layout_alignParentTop="true"  
        android:layout_marginRight="22dp"  
        android:layout_marginTop="16dp"  
        android:ems="10" />  
  
    <EditText  
        android:id="@+id/editText2"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:layout_alignLeft="@+id/editText1"  
        android:layout_below="@+id/editText1"  
        android:layout_marginTop="18dp"  
        android:ems="10" >  
  
        <requestFocus />  
    </EditText>  
  
    <EditText  
        android:id="@+id/editText3"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:layout_alignLeft="@+id/editText2"  
        android:layout_below="@+id/editText2"  
        android:layout_marginTop="28dp"  
        android:ems="10"  
        android:inputType="textMultiLine" />  
  
    <TextView  
        android:id="@+id/textView1"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:layout_alignBaseline="@+id/editText1"  
        android:layout_alignBottom="@+id/editText1"  
        android:layout_alignParentLeft="true"  
        android:text="To:" />  
  
    <TextView  
        android:id="@+id/textView2"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:layout_alignBaseline="@+id/editText2"  
        android:layout_alignBottom="@+id/editText2"  
        android:layout_alignParentLeft="true"  
        android:text="Subject:" />  
  
    <TextView  
        android:id="@+id/textView3"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:layout_alignBaseline="@+id/editText3"  
        android:layout_alignBottom="@+id/editText3"  
        android:layout_alignParentLeft="true"  
        android:text="Message:" />  
  
    <Button  
        android:id="@+id/button1"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:layout_alignLeft="@+id/editText3"  
        android:layout_below="@+id/editText3"  
        android:layout_marginLeft="76dp"  
        android:layout_marginTop="20dp"  
        android:text="Send" />  
  
</RelativeLayout>

File: MainActivity.java


import android.os.Bundle;  
import android.app.Activity;  
import android.content.Intent;  
import android.view.Menu;  
import android.view.View;  
import android.view.View.OnClickListener;  
import android.widget.Button;  
import android.widget.EditText;  
  
public class MainActivity extends Activity {  
    EditText editTextTo,editTextSubject,editTextMessage;  
    Button send;  
    @Override  
    protected void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.activity_main);  
          
        editTextTo=(EditText)findViewById(R.id.editText1);  
        editTextSubject=(EditText)findViewById(R.id.editText2);  
        editTextMessage=(EditText)findViewById(R.id.editText3);  
          
        send=(Button)findViewById(R.id.button1);  
          
        send.setOnClickListener(new OnClickListener(){  
  
            @Override  
            public void onClick(View arg0) {  
                 String to=editTextTo.getText().toString();  
                 String subject=editTextSubject.getText().toString();  
                 String message=editTextMessage.getText().toString();  
                   
                  
                 Intent email = new Intent(Intent.ACTION_SEND);  
                  email.putExtra(Intent.EXTRA_EMAIL, new String[]{ to});  
                  email.putExtra(Intent.EXTRA_SUBJECT, subject);  
                  email.putExtra(Intent.EXTRA_TEXT, message);  
       
                  //need this to prompts email client only  
                  email.setType("message/rfc822");  
       
                  startActivity(Intent.createChooser(email, "Choose an Email client :"));  
       
            }  
              
        });  
    }  
  
    @Override  
    public boolean onCreateOptionsMenu(Menu menu) {  
        // Inflate the menu; this adds items to the action bar if it is present.  
        getMenuInflater().inflate(R.menu.activity_main, menu);  
        return true;  
    }  
  
}