dialer java

MainActivity.java


package com.example.program9;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.content.Intent;
import android.widget.TextView;
import androidx.appcompat.app.AppCompatActivity;
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
 TextView display;
 Button one, two, three, four, five, six, seven, eight, nine, zero, star, hash, save, call, delete;
 @Override
 protected void onCreate(Bundle b) {
 super.onCreate(b);
 setContentView(R.layout.activity_main);
 display = findViewById(R.id.idDisplay);
 one = findViewById(R.id.id1);
 two = findViewById(R.id.id2);
 three = findViewById(R.id.id3);
 four = findViewById(R.id.id4);
 five = findViewById(R.id.id5);
 six = findViewById(R.id.id6);
 seven = findViewById(R.id.id7);
 eight = findViewById(R.id.id8);
 nine = findViewById(R.id.id9);
 zero = findViewById(R.id.id0);
 star = findViewById(R.id.idStar);
 hash = findViewById(R.id.idHash);
 save = findViewById(R.id.idSave);
call = findViewById(R.id.idCall);
 delete = findViewById(R.id.idDelete);
 one.setOnClickListener(this);
 two.setOnClickListener(this);
 three.setOnClickListener(this);
 four.setOnClickListener(this);
 five.setOnClickListener(this);
 six.setOnClickListener(this);
 seven.setOnClickListener(this);
 eight.setOnClickListener(this);
 nine.setOnClickListener(this);
 zero.setOnClickListener(this);
 star.setOnClickListener(this);
 hash.setOnClickListener(this);
 save.setOnClickListener(this);
 call.setOnClickListener(this);
 delete.setOnClickListener(this);
 }
 @Override
 public void onClick(View v) {
 String numStr = display.getText().toString();
 switch (v.getId()){
 case R.id.id1:
 display.append("1");
 break;
 case R.id.id2:
 display.append("2");
 break;
 case R.id.id3:
 display.append("3");
 break;
 case R.id.id4:
 display.append("4");
 break;
 case R.id.id5:
 display.append("5");
 break;
 case R.id.id6:
 display.append("6");
break;
 case R.id.id7:
 display.append("7");
 break;
 case R.id.id8:
 display.append("8");
 break;
 case R.id.id9:
 display.append("9");
 break;
 case R.id.id0:
 display.append("0");
 break;
 case R.id.idStar:
 display.append("*");
 break;
 case R.id.idHash:
 display.append("#");
 break;
 case R.id.idSave:
 Intent it1 = new Intent(Intent.ACTION_INSERT);
 it1.setType("vnd.android.cursor.dir/contact");
 it1.putExtra("phone", numStr);
 startActivity(it1);
 break;
 case R.id.idCall:
 Intent it2 = new Intent(Intent.ACTION_DIAL);
 it2.setData(Uri.parse("tel:"+numStr));
 startActivity(it2);
 break;
 case R.id.idDelete:
 if (numStr.length() > 0){
 numStr = numStr.substring(0, numStr.length()-1);
 display.setText(numStr);
 }
 break;
 }
 }
}