Android : Calcul a+b

Créer une application de calcul simple permettant de calcuer a+b

1.Layout

<LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        android:paddingHorizontal="55dp"
        android:weightSum="3"
        android:background="#D8FDF3">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal"
            android:layout_marginTop="300dp"
            android:layout_weight="0.1">

            <EditText
                android:id="@+id/x"
                android:layout_width="wrap_content"
                android:layout_height="match_parent"
                android:layout_marginHorizontal="10dp"
                android:layout_weight="2"
                android:inputType="number"
                android:backgroundTint="#09BC8A"
                android:hint="X"
                android:textAlignment="center"
                android:textColor="#000"
                android:textSize="25dp" />

            <requestFocus />

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="match_parent"
                android:text="+"
                android:textSize="25dp"
                android:gravity="center"
                android:layout_weight="0.6"
                android:backgroundTint="#D8FDF3"
                android:textColor="#004346"

                android:layout_marginHorizontal="10dp"/>

            <EditText
                android:id="@+id/y"
                android:layout_width="wrap_content"
                android:layout_height="match_parent"
                android:hint="Y"
                android:inputType="number"
                android:textAlignment="center"
                android:backgroundTint="#09BC8A"
                android:textColor="#000"
                android:layout_weight="2"
                android:textSize="25dp"
                android:layout_marginHorizontal="10dp"/>

        </LinearLayout>
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="0">

            <Button
                android:id="@+id/equal"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginHorizontal="10dp"
                android:layout_weight="0"
                android:backgroundTint="#004346"
                android:paddingHorizontal="30dp"
                android:text="="
                android:textColor="#09BC8A"
                android:textSize="25dp" />
        </LinearLayout>
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="0">

            <TextView
                android:id="@+id/resultat"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text=""
                android:textAlignment="center"
                android:textSize="60dp"
                android:textColor="#09BC8A"/>

        </LinearLayout>

    </LinearLayout>

2.Java

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class CalculApusBActivity extends AppCompatActivity implements View.OnClickListener {

    //1.Délarer les objet java
    EditText x_input, y_input;
    Button equal_button;
    TextView resultat;

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

     //2.Lier les objet graphique avec les objet java
        x_input = findViewById(R.id.x);
        y_input = findViewById(R.id.y);
        equal_button = findViewById(R.id.equal);
        resultat = findViewById(R.id.resultat);
    //3.Ecouter les boutons
        equal_button.setOnClickListener(this);

    }



    @Override
    public void onClick(View view) {
      if(view.getId()==equal_button.getId())
      {
          double x1, y1, result;
          if (!x_input.getText().toString().isEmpty() && !y_input.getText().toString().isEmpty()){
              x1 = Double.parseDouble(x_input.getText().toString());
              y1 = Double.parseDouble(y_input.getText().toString());
              result = x1 + y1;
              resultat.setText(String.valueOf(result));
          } else {
              resultat.setText("champs obligatoires");
              resultat.setTextSize(18);
          }
      }
    }
}