MainActivity.java

package com.baruberbagi.callphone;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.net.Uri;
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 {

    Button permanencall,manualCall;
    EditText edtManual;
    String noTLP = "tel:1234567";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        permanencall = findViewById(R.id.btnPermanenCall);
        manualCall = findViewById(R.id.btnManualCall);
        edtManual = findViewById(R.id.edtManual);

        permanencall.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(Intent.ACTION_DIAL);
                intent.setData(Uri.parse(noTLP));
                startActivity(intent);
            }
        });


        manualCall.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String nomor = edtManual.getText().toString();
               if (nomor.equals("")){
                   edtManual.setError("Harus di isi");
               }else {
                   Intent i = new Intent(Intent.ACTION_DIAL);
                   i.setData(Uri.parse("tel:"+nomor));
                   startActivity(i);
               }
            }
        });


    }
}