Android Studio输入整数或浮点数相加

1.activity_main.xml

2.MainActivity.java

package com.example.abc;

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 MainActivity extends AppCompatActivity {
    private EditText ed1,ed2;
    private Button add;
    private TextView sum;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ed1=(EditText) findViewById(R.id.num1);
        ed2=(EditText) findViewById(R.id.num2);
        sum=(TextView) findViewById(R.id.show);
        add=(Button) findViewById(R.id.add);
        add.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                float num1=Float.parseFloat(ed1.getText().toString());
                float num2=Float.parseFloat(ed2.getText().toString());
                float num3=num1+num2;
                sum.setText(num1+"+"+num2+"="+num3);
            }
        });
    }
}

3.运行结果