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 }
View Code
