How to open dialer in Android through Intent?

 How to open dialer in Android through Intent

1.MainActivity.java:

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();

        }

    }

}

2. activity_main.xml:

<?xml version="1.0" encoding="utf-8"?>

<android.support.constraint.ConstraintLayout

xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:tools="http://schemas.android.com/tools"

xmlns:app="http://schemas.android.com/apk/res-auto"

<!-- 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>

3.Use Permission on Mainfeast.xml:

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