Android练习之RadioButton

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  1 package com.example.flexd15;
  2 
  3 import android.os.Bundle;
  4 import android.app.Activity;
  5 import android.view.Menu;
  6 import android.view.View;
  7 import android.view.View.OnClickListener;
  8 import android.view.animation.Animation;
  9 import android.view.animation.AnimationUtils;
 10 import android.widget.AnalogClock;
 11 import android.widget.Button;
 12 import android.widget.RadioButton;
 13 import android.widget.RadioGroup;
 14 import android.widget.RadioGroup.OnCheckedChangeListener;
 15 import android.widget.TextView;
 16 import android.widget.Toast;
 17 
 18 /**
 19  * 每次在RadioGroup中随机内定一个作为正确答案，
 20  * 点选RadioButton 点Button提交 判断是否正确
 21  */
 22 public class MainActivity extends Activity {
 23     
 24     private RadioButton rb1,rb2,rb3;
 25     private Button bt1,bt2;
 26     private TextView tv1;
 27     private RadioGroup rg1;
 28     private boolean choice = false;//选择是否正确
 29     private int correctChoice = -2;//正确答案的ID
 30     private int intTimes = 0;
 31 
 32     @Override
 33     protected void onCreate(Bundle savedInstanceState) {
 34         super.onCreate(savedInstanceState);
 35         setContentView(R.layout.activity_main);
 36         
 37         //widget
 38         bt1 = (Button)findViewById(R.id.bt1);
 39         bt2 = (Button)findViewById(R.id.bt2);
 40         rg1 = (RadioGroup) findViewById(R.id.rg1);
 41         tv1 = (TextView) findViewById(R.id.tv1);
 42         
 43         //指定答案
 44         getAnswer();
 45         
 46         //Listener
 47         bt1.setOnClickListener(buttonListener);
 48         bt2.setOnClickListener(buttonListener);
 49         rg1.setOnCheckedChangeListener(radioGroupListener);
 50     }
 51     
 52     /**
 53      * 生成答案方法
 54      */
 55     private void getAnswer(){
 56         rb1 = (RadioButton)findViewById(R.id.rb1);
 57         rb2 = (RadioButton)findViewById(R.id.rb2);
 58         rb3 = (RadioButton)findViewById(R.id.rb3);
 59         
 60         // 供选择的答案，即三个RadioButton的ID
 61         int[] choiceArray = { rb1.getId(), rb2.getId(), rb3.getId() };
 62         // 随机产生一个答案
 63         int random = (int) (Math.random() * 3);// [0,1) => [0,2.7...) => 0,1,2
 64         correctChoice = choiceArray[random];
 65     }
 66     
 67     /**
 68      * RadioGroup选择事件,选择后判断正误
 69      */
 70     private RadioGroup.OnCheckedChangeListener radioGroupListener = new OnCheckedChangeListener() {
 71         
 72         @Override
 73         public void onCheckedChanged(RadioGroup group, int checkedId) {
 74             if(checkedId==correctChoice){
 75                 choice = true;
 76             }else{
 77                 choice = false;
 78             }
 79         }
 80     };
 81     
 82     /**
 83      * Button事件
 84      */
 85     private View.OnClickListener buttonListener = new OnClickListener() {
 86         
 87         @Override
 88         public void onClick(View v) {
 89             
 90             if(bt1.getId()==v.getId()){
 91                 //ButtonSubmit
 92                 if(choice){
 93                     //answer correct
 94                     getAnswer();//init
 95                     Toast.makeText(MainActivity.this, "correct", Toast.LENGTH_LONG).show();
 96                     choice = false;
 97                     rg1.clearCheck();
 98                 }else{
 99                     //answer wrong
100                     Toast.makeText(MainActivity.this, "error", Toast.LENGTH_LONG).show();
101                     rg1.clearCheck();
102                     Animation ani = AnimationUtils.loadAnimation(MainActivity.this, R.anim.shake);
103                     v.startAnimation(ani);
104                 }
105             }else if(bt1.getId()==v.getId()){
106                 //ButtonClear
107                 getAnswer();
108                 choice = false;
109                 rg1.clearCheck();
110             }
111         }
112     };
113     
114 
115     @Override
116     public boolean onCreateOptionsMenu(Menu menu) {
117         // Inflate the menu; this adds items to the action bar if it is present.
118         getMenuInflater().inflate(R.menu.activity_main, menu);
119         return true;
120     }
121 
122 }

 

转载于:https://www.cnblogs.com/imzzh/archive/2013/02/05/2893006.html