Create an application to call specific entered number by user in the EditText


MainActivity.java

package com.example.assignment14;

import androidx.appcompat.app.AppCompatActivity;

import androidx.core.app.ActivityCompat;

import android.Manifest;

import android.content.Intent;

import android.content.pm.PackageManager;

import android.net.Uri;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.EditText;

import android.os.Bundle;

import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    EditText txt_phoneNumber;

    Button btn_call;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        txt_phoneNumber = (EditText) findViewById(R.id.txt_number);

        btn_call = (Button) findViewById(R.id.btn_call);

        btn_call.setOnClickListener(new OnClickListener() {

            @Override

            public void onClick(View v) {

                Intent intentCall = new Intent(Intent.ACTION_CALL);

                String number = txt_phoneNumber.getText().toString();

                if (number.trim().isEmpty()) {

                    Toast.makeText(MainActivity.this, "Please Enter  Your Number", Toast.LENGTH_SHORT).show();

                } else {

                    intentCall.setData(Uri.parse("tel:" + number));

                }

                if (ActivityCompat.checkSelfPermission(getApplicationContext(), Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED) {

                    Toast.makeText(MainActivity.this, "Please Grant Permission", Toast.LENGTH_SHORT).show();

                    requestPermission();

                } else {

                    startActivity(intentCall);

                }

            }

        });

    }

    private void requestPermission(){

        ActivityCompat.requestPermissions(MainActivity.this,new String[]{Manifest.permission.CALL_PHONE},1);

    }

}

activity_main.xml

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

<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"

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

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

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    tools:context=".MainActivity">

    <EditText

        android:id="@+id/txt_number"

        android:layout_width="225dp"

        android:layout_height="52dp"

        android:layout_marginTop="236dp"

        android:ems="10"

        android:hint="Enter Phone Number"

        android:inputType="phone"

        android:textColor="#040303"

        app:layout_constraintEnd_toEndOf="parent"

        app:layout_constraintStart_toStartOf="parent"

        app:layout_constraintTop_toTopOf="parent"

        app:layout_goneMarginTop="50dp">

    </EditText>

    <Button

        android:id="@+id/btn_call"

        android:layout_width="99dp"

        android:layout_height="53dp"

        android:layout_centerHorizontal="true"

        android:layout_marginBottom="304dp"

        android:text="Call"

        android:textSize="20sp"

        app:layout_constraintBottom_toBottomOf="parent"

        app:layout_constraintEnd_toEndOf="parent"

        app:layout_constraintStart_toStartOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

AndroidManifest.xml

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

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

    package="com.example.assignment14">

    <uses-sdk android:minSdkVersion="8"/>

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

    <application

        android:allowBackup="true"

        android:icon="@mipmap/ic_launcher"

        android:label="@string/app_name"

        android:roundIcon="@mipmap/ic_launcher_round"

        android:supportsRtl="true"

        android:theme="@style/AppTheme">

        <activity android:name=".MainActivity">

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

    </application>

</manifest>

Output

To download follow this link : Program 14