android动态radiobutton androidradiobutton|Android

除了通过从调色板中拖放来创建RadioButton之外，android还可以帮助你以编程方式（动态）创建它。为了创建动态RadioButton，我们需要使用android.view.ViewGroup.LayoutParams，它配置视图的宽度和高度并实现RadioGroup类的setOnCheckedChangeListener（）方法。
动态单选按钮的示例
【android动态radiobutton】让我们看一个动态RadioButton的例子。
activity_main.xml
文件：activity_main.xml

< ?xml version="1.0" encoding="utf-8"?> < RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" android:id="@+id/relativeLayout" tools:context="com.example.test.dynamicradiobutton.MainActivity">< /RelativeLayout>

活动类
文件：MainActivity.java

package com.example.test.dynamicradiobutton; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.widget.RadioButton; import android.widget.RadioGroup; import android.widget.RelativeLayout; import android.widget.RelativeLayout.LayoutParams; import android.widget.Toast; public class MainActivity extends AppCompatActivity { RadioGroup rg; RelativeLayout rl; RadioButton rb1, rb2; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); rg = new RadioGroup(this); rl = (RelativeLayout) findViewById(R.id.relativeLayout); rb1 = new RadioButton(this); rb2 = new RadioButton(this); rb1.setText("Male"); rb2.setText("Female"); rg.addView(rb1); rg.addView(rb2); rg.setOrientation(RadioGroup.HORIZONTAL); RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams((int) LayoutParams.WRAP_CONTENT, (int)LayoutParams.WRAP_CONTENT); params.leftMargin =150; params.topMargin = 100; rg.setLayoutParams(params); rl.addView(rg); rg.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() { @Override public void onCheckedChanged(RadioGroup group, int checkedId) { RadioButton radioButton = (RadioButton) findViewById(checkedId); Toast.makeText(getApplicationContext(), radioButton.getText(), Toast.LENGTH_LONG).show(); } }); } }