安卓radiobutton控件代码

Android中的RadioButton是一种单选按钮组件，用户只能从一组选项中选择一个。以下是创建一个简单的RadioButton的基本步骤及代码示例：

import android.app.Activity;
import android.os.Bundle;
import android.widget.Button;
import android.widget.RadioButton;
import android.widget.RadioGroup;

public class RadioButtonActivity extends Activity {
    private RadioGroup radioGroup;
    private RadioButton radioButton1;
    private RadioButton radioButton2;

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

        // 初始化RadioGroup和RadioButton
        radioGroup = findViewById(R.id.radio_group);
        radioButton1 = findViewById(R.id.radioButton1); // 假设id为"radioButton1"
        radioButton2 = findViewById(R.id.radioButton2); // 假设id为"radioButton2"

        // 设置初始选中的RadioButton
        radioButton1.setChecked(true);

        // 创建一个Button并设置点击事件监听
        Button selectButton = findViewById(R.id.select_button);
        selectButton.setOnClickListener(view -> {
            if (radioButton1.isChecked()) {
                radioButton2.setChecked(false);
            } else {
                radioButton1.setChecked(true);
            }
        });
    }

    // 如果需要的话，可以添加RadioGroup的CheckedChangeListener监听广播组的状态变化
    @Override
    protected void onResume() {
        super.onResume();
        radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(RadioGroup group, int checkedId) {
                switch (checkedId) {
                    case R.id.radioButton1:
                        Toast.makeText(RadioButtonActivity.this, "RadioButton 1 selected", Toast.LENGTH_SHORT).show();
                        break;
                    case R.id.radioButton2:
                        Toast.makeText(RadioButtonActivity.this, "RadioButton 2 selected", Toast.LENGTH_SHORT).show();
                        break;
                }
            }
        });
    }
}

在这个例子中，我们首先设置了第一个RadioButton为默认选中状态，然后当用户点击按钮时会切换选中状态。`RadioGroup`的`OnCheckedChangeListener`会在用户切换选项时触发回调。