RadioButton

最新推荐文章于 2025-05-15 12:13:00 发布

原创最新推荐文章于 2025-05-15 12:13:00 发布 · 507 阅读

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本文介绍如何在Android中使用RadioButton和RadioGroup实现单项选择功能，包括布局设计和代码实现。

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RadioButton结合RadioGroup实现单项选择

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity" >

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal" >

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="性别" />

        <RadioGroup
            android:id="@+id/sex"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="10sp"
            android:orientation="vertical" >

            <RadioButton
                android:id="@+id/nan"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="男	" />

            <RadioButton
                android:id="@+id/nv"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="女	" />
        </RadioGroup>
    </LinearLayout>

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="选择性别" />

</LinearLayout>

package com.example.android_radiobutton;

import android.os.Bundle;
import android.app.Activity;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.Toast;

public class MainActivity extends Activity {

	private RadioGroup radioGroup;
	private Button button;

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

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		radioGroup = (RadioGroup) findViewById(R.id.sex);
		button = (Button) findViewById(R.id.button1);
		button.setOnClickListener(new View.OnClickListener() {

			@Override
			public void onClick(View arg0) {
				// TODO Auto-generated method stub
				int radioButtonCount=radioGroup.getChildCount();
				/*for(int i=0;i<radioButtonCount;i++){
					RadioButton radioButton=(RadioButton) radioGroup.getChildAt(i);
					String text=radioButton.getText().toString();
					Toast.makeText(MainActivity.this,text, 1).show();
				}*/
				RadioButton radioButton1 = (RadioButton) findViewById(radioGroup.getCheckedRadioButtonId());
				String text=radioButton1.getText().toString();
				Toast.makeText(MainActivity.this,text, 1).show();
			}
		});
		return true;
	}

}