The phone dialer is an activity available with the Android operating system to call a number. Usually, such activity may or may not have an EditText, for taking the number as input, and a Call button. When the user presses the Call button, it invokes the dialer app activity. Use of ‘tel:’ prefix is recommended, else java.lang.IllegalStateException will be thrown. Action_Dial doesn’t require any permission. Below is the code for MainActivity file in both Java and Kotlin.
package com.geeksforgeeks.gfg.dial;
// importing packages import android.content.Intent;
import android.net.Uri;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState)
{
super .onCreate(savedInstanceState);
// Binding MainActivity.java with
// activity_main.xml file
setContentView(R.layout.activity_main);
}
// This function is called when button is clicked.
public void Call(View v)
{
// Find the EditText by its unique ID
EditText e = (EditText)findViewById(R.id.editText);
// show() method display the toast with message
// "clicked"
Toast.makeText( this , "clicked" , Toast.LENGTH_LONG)
.show();
// Use format with "tel:" and phoneNumber created is
// stored in u.
Uri u = Uri.parse( "tel:" + e.getText().toString());
// Create the intent and set the data for the
// intent as the phone number.
Intent i = new Intent(Intent.ACTION_DIAL, u);
try
{
// Launch the Phone app's dialer with a phone
// number to dial a call.
startActivity(i);
}
catch (SecurityException s)
{
// show() method display the toast with
// exception message.
Toast.makeText( this , "An error occurred" , Toast.LENGTH_LONG)
.show();
}
}
} |
package com.geeksforgeeks.gfg.dial
import android.content.Intent
import android.net.Uri
import android.os.Bundle
import android.view.View
import android.widget.EditText
import android.widget.Toast
import androidx.appcompat.app.AppCompatActivity
import com.example.gfgreviewinjava.R
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super .onCreate(savedInstanceState)
// Binding MainActivity.java with
// activity_main.xml file
setContentView(R.layout.activity_main)
}
// This function is called when button is clicked.
fun Call(v: View?) {
// Find the EditText by its unique ID
val e = findViewById<View>(R.id.editText) as EditText
// show() method display the toast with message
// "clicked"
Toast.makeText( this , "clicked" , Toast.LENGTH_LONG)
.show()
// Use format with "tel:" and phoneNumber created is
// stored in u.
val u = Uri.parse( "tel:" + e.text.toString())
// Create the intent and set the data for the
// intent as the phone number.
val i = Intent(Intent.ACTION_DIAL, u)
try {
// Launch the Phone app's dialer with a phone
// number to dial a call.
startActivity(i)
} catch (s: SecurityException) {
// show() method display the toast with
// exception message.
Toast.makeText( this , "An error occurred" , Toast.LENGTH_LONG)
.show()
}
}
} |
In order to make a direct call without switching into dialer activity, you need to add Intent.ACTION_CALL in place of Intent.ACTION_DIAL.
activity_main.xml
<? xml version = "1.0" encoding = "utf-8" ?>
< android.support.constraint.ConstraintLayout
<!-- covers entire width of the screen -->
android:layout_width="match_parent"
<!-- covers entire height of the screen -->
android:layout_height="match_parent"
tools:context="com.example.hp.dial.MainActivity">
< EditText
android:id = "@+id/editText"
<!-- covers as much width as required. -->
android:layout_width="wrap_content"
<!-- covers as much height as required. -->
android:layout_height="wrap_content"
<!-- left spacing from the parent layout-->
android:layout_marginLeft="8dp"
<!-- right spacing from the parent layout-->
android:layout_marginRight="8dp"
<!-- top spacing from the parent layout-->
android:layout_marginTop="65dp"
<!-- hint works as a place holder -->
android:hint="Phone No."
<!-- Expressing the given input should be phone no -->
android:inputType="phone"
app:layout_constraintHorizontal_bias="0.503"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
< Button
android:id = "@+id/button"
<!-- covers as much width as required. -->
android:layout_width="wrap_content"
<!-- covers as much height as required. -->
android:layout_height="wrap_content"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginTop="67dp"
<!-- name of function is Call, and it is -->
<!-- invoked when the button is clicked.-->
android:onClick="Call"
android:text="DIAL"
<!-- below are the positions of the button -->
<!-- with respect to editText and parent layout. -->
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/editText"
/>
</ android.support.constraint.ConstraintLayout >
|
In AndroidManifest.xml, include the below permission to directly call without opening in a dialer. To make a call through open in a dialer, below permission is not needed.
uses-permission android:name="android.permission.CALL_PHONE"