1、單選按鈕(RadioButton)的基本概念
單選按鈕,只能選擇一個;
一組單選按鈕只能選中一個;
2、RadioGroup與RadioButton
3、OnClickListener 與OnCheckedChangeListener監聽器
package com.huan.security.securityapp;
import android.provider.Settings;
import android.support.annotation.IdRes;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.RadioButton;
import android.widget.RadioGroup;
public class MainActivity extends AppCompatActivity {
private RadioGroup radioGroup;
private RadioButton femaleButton;
private RadioButton maleButton;
private CheckBox eatBox;
private CheckBox sleepBox;
private CheckBox dotaBox;
private CheckBox allBox;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.first_layout);
eatBox=(CheckBox)findViewById(R.id.eatId);
sleepBox=(CheckBox)findViewById(R.id.sleepId);
dotaBox=(CheckBox)findViewById(R.id.dotaId);
allBox=(CheckBox)findViewById(R.id.allbox);
radioGroup=(RadioGroup)findViewById(R.id.radioGroupId);
femaleButton=(RadioButton)findViewById(R.id.femaleButtonId);
maleButton =(RadioButton)findViewById(R.id.maleButtonId);
RadioGroupListener radioGroupListener=new RadioGroupListener();
radioGroup.setOnCheckedChangeListener(radioGroupListener);
RadioButtonListener radioButtonListener=new RadioButtonListener();
femaleButton.setOnCheckedChangeListener(radioButtonListener);
CheckBoxListener listener=new CheckBoxListener();
allBox.setOnCheckedChangeListener(listener);
}
class RadioButtonListener implements CompoundButton.OnCheckedChangeListener{
@Override
public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
System.out.println("isChecked--->"+b);
}
}
class RadioGroupListener implements RadioGroup.OnCheckedChangeListener{
@Override
public void onCheckedChanged(RadioGroup radioGroup, @IdRes int i) {
if(i==R.id.femaleButtonId){
System.out.println("選中了female");
}
else if(i==R.id.maleButtonId){
System.out.println("選中了male");
}
}
}
class CheckBoxListener implements CompoundButton.OnCheckedChangeListener{
@Override
public void onCheckedChanged(CompoundButton compoundButton, boolean b) {//CompoundButton是checkbox的父類,onCheckedChanged爲checkbox設計的,當選中與被選中狀態改變時,會調用。
eatBox.setChecked(b);
sleepBox.setChecked(b);
dotaBox.setChecked(b);
}
}
class OnBoxClickListener implements View.OnClickListener{
@Override
public void onClick(View view) {//就是checkbox對象,是可以向上轉型爲view
//view.getId();//控件得ID;
/*
System.out.println("id------>"+view.getId());
if(view.getId()==R.id.eatId){
System.out.println("eatBox");
}
else if (view.getId()==R.id.sleepId){
System.out.println("sleepId");
}
else if (view.getId()==R.id.dotaId){
System.out.println("doatId");
}
*/
CheckBox box=(CheckBox)view;
if(box.getId()==R.id.eatId){
System.out.println("eatId");
}
else if (box.getId()==R.id.sleepId){
System.out.println("sleepId");
}
else if (box.getId()==R.id.dotaId){
System.out.println("dotaId");
}
if(box.isChecked()){
System.out.println("checked");
}
else{
System.out.println("unchecked");
}
System.out.println("Checkbox is clicked");
}
}
}
展示: