1月14日 Radiobutton

Radio button

学习Radiobutton

package com.example.firstapp;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.Toast;

import java.security.acl.Group;

public class RadioButtonActivity extends AppCompatActivity {
    private RadioGroup mRg1;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_radio_button);
        mRg1=findViewById(R.id.rg_1);
        mRg1.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(RadioGroup group, int checkedId) {
                RadioButton radioButton= group.findViewById(checkedId);
                Toast.makeText(RadioButtonActivity.this, radioButton.getText(), Toast.LENGTH_SHORT).show();
            }
        });
    }
}