KalkulatorZakat

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
    android:layout_marginStart="8dp"
    android:layout_marginTop="8dp"
    android:layout_marginEnd="8dp"
    android:layout_marginBottom="8dp"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <EditText
        android:id="@+id/gaji"
        android:layout_width="250dp"
        android:layout_height="wrap_content"
        android:hint="Penghasilan/Gaji per Bulan" />

    <EditText
        android:id="@+id/lain"
        android:layout_width="250dp"
        android:layout_height="wrap_content"
        android:hint="Penghasilan lainnya per Bulan" />

    <EditText
        android:id="@+id/hutang"
        android:layout_width="250dp"
        android:layout_height="wrap_content"
        android:hint="Cicilan/Hutang per Bulan" />

    <EditText
        android:id="@+id/beras"
        android:layout_width="250dp"
        android:layout_height="wrap_content"
        android:layout_marginBottom="20dp"
        android:hint="Harga beras saat ini" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:layout_marginBottom="20dp"
        android:onClick="hitung"
        android:text="Hitung" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="4dp"
        android:text="Total Pendapatan"
        android:textSize="18dp" />
    I
    <TextView
        android:id="@+id/pendapatan"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="18dp"
        android:text="0"
        android:textSize="18dp" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="4dp"
        android:text="Nishab Zakat"
        android:textSize="18dp" />

    I

    <TextView
        android:id="@+id/nishab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="18dp"
        android:text="0"
        android:textSize="18dp" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="4dp"
        android:text="Zakat yang harus dikeluarkan /bulan"
        android:textSize="18dp" />

    <TextView
        android:id="@+id/total"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="0"
        android:textSize="24dp" />
</LinearLayout>


public class MainActivity extends AppCompatActivity {

    EditText edGaji, edLain, edHutang, edBeras;
    TextView tvNishab, tvTotal, tvPendapatan;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        edGaji = findViewById(R.id.gaji);
        edLain = findViewById(R.id.lain);
        edHutang = findViewById(R.id.hutang);
        tvPendapatan = findViewById(R.id.pendapatan);
        edBeras = findViewById(R.id.beras);
        tvNishab = findViewById(R.id.nishab);
        tvTotal = findViewById(R.id.total);
    }

    public void hitung(View view) {
        double vGaji, vLain, vHutang, vZakat,
                vBeras, vHasil, vNishab;
        vGaji = Double.parseDouble(
                edGaji.getText().toString());
        vLain = Double.parseDouble(
                edLain.getText().toString());
        vHutang = Double.parseDouble(
                edHutang.getText().toString());
        vBeras = Double.parseDouble(
                edBeras.getText().toString());

        vHasil = vGaji + vLain - vHutang;
        vNishab = 522 * vBeras;

        vZakat = vHasil * 0.025;

        tvPendapatan.setText(
                Double.toString(vHasil));
        tvNishab.setText(
                Double.toString(vNishab));

        if(vHasil > vNishab){
            tvTotal.setText(
                    Double.toString(vZakat));
        }else{
            tvTotal.setText(
                    "Anda Tidak Wajib Membayar" +
                            "Zakat");
        }
    }
}