package com.example.ulanganharian;

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import androidx.appcompat.app.AppCompatActivity;

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import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import android.widget.EditText;

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import java.util.ArrayList;

import java.util.List;

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public class MainActivity extends AppCompatActivity {

    private EditText et_Panjang, et_Lebar, et_Tinggi;

    private double p, 1, t;

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    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

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        et_Panjang = findViewById(R.id.etPanjang);

        et_Lebar = findViewById(R.id.etLebar);

        et_Tinggi = findViewById(R.id.etTinggi);

    }

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    private void data (List<string> variabel) {

        String panjang = et_Panjang.getText().toString();

        String lebar = et_Lebar.getText().toString();

        p = Double.parseDouble(panjang);

        l = Double.parseDouble(lebar);

        t = Double.parseDouble(tinggi);

    }

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    public void hitung_luas(View view) {

       List<string> variabel = new ArrayList<>();

       data(variabel);

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       Double luas = 2*(p*l + p*t + l*t);

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       Intent intent = new Intent(packageContext: this, ResultActivity.class);

       intent.putExtra(name: "data", String.valueOf(luas));

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       startActivity(intent);

    }

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    public void hitung_keliling(View view) {

        List<string> variabel = new ArrayList<>();

        data(variabel);

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        Double keliling = 4*(p+l+t);

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        Intent intent = new Intent(packageContext: this, ResultActivity.class);

        intent.putExtra(name: "data", String.valueOf(keliling));

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        startActivity(intent);

    }

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    public void hitung_volume(View view) {

        List<string> variabel = new ArrayList<>();

        data(variabel);

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        Double Volume = p*l*t;

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        Intent intent = new Intent(packageContext: this, ResultActivity.class);

        intent.putExtra(name: "data", String.valueOf(volume));

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        startActivity(intent);

    }

}

​