极简三位数加减出题软件

暑假帮妹妹在预习三年级的数学，我觉得每天要给她出算术题批改太麻烦了= =

所以今天花了半天给妹妹做了个安卓端的简单出题软件让她装她手机上。

思路就是：妹妹打开软件，点击按钮生成题目，她把题目抄在本子上列竖式计算，最后再让她点击答案自己批改。

科技改变生活啊！算术书都不用买了2333333

 

界面什么的都很简单：

 

代码也非常简单：

MainActivity.java

  1 package com.example.studentc;
  2 
  3 import android.app.Activity;
  4 import android.os.Bundle;
  5 import android.view.Menu;
  6 import android.view.MenuItem;
  7 import android.view.View;
  8 import android.view.View.OnClickListener;
  9 import android.widget.Button;
 10 import android.widget.TextView;
 11 
 12 
 13 public class MainActivity extends Activity {
 14     private TextView[] a;   //使用数组批量使用id
 15     private TextView textViewKey;
 16     private Button button1;
 17     private Button button2;
 18     int[] key = new int[20];
 19     @Override
 20     protected void onCreate(Bundle savedInstanceState) {
 21         super.onCreate(savedInstanceState);
 22         setContentView(R.layout.activity_main);
 23 
 24         a = new TextView[20];
 25         int[] textViewID = new int[] { R.id.textView1, R.id.textView2,
 26                 R.id.textView3, R.id.textView4, R.id.textView5, R.id.textView6,
 27                 R.id.textView7, R.id.textView8, R.id.textView9,
 28                 R.id.textView10, R.id.textView11, R.id.textView12,
 29                 R.id.textView13, R.id.textView14, R.id.textView15,
 30                 R.id.textView16, R.id.textView17, R.id.textView18,
 31                 R.id.textView19, R.id.textView20 };
 32         for (int i = 0; i < 20; i++) {
 33             a[i] = (TextView) findViewById(textViewID[i]);
 34         }
 35         textViewKey = (TextView)findViewById(R.id.textView21);
 36         button1 = (Button)findViewById(R.id.button1);
 37         button2 = (Button)findViewById(R.id.button2);
 38         
 39         OnClickButtonListener listener = new OnClickButtonListener();
 40         OnClickKeyButtonListener listener2 = new OnClickKeyButtonListener();
 41         button1.setOnClickListener(listener);
 42         button2.setOnClickListener(listener2);
 43     }
 44 
 45     class OnClickButtonListener implements OnClickListener{
 46         @Override
 47         public void onClick(View v) {
 48             int first;
 49             int second;
 50 
 51             textViewKey.setText("KEY: ");
 52 
 53             for (int i = 0; i < 10; i++) {
 54                 first = (int) (Math.random() * 1000);
 55                 second = (int) (Math.random() * 1000);
 56                 Formula formula = new Formula(first, "+", second);
 57                 a[i].setText("(" + (i + 1) + ")" + formula.getFirst()
 58                         + formula.getSign() + formula.getSecond() + "=");
 59                 key[i] = formula.getFirst() + formula.getSecond();
 60             }
 61             for (int i = 0; i < 10; i++) {
 62                 first = (int) (Math.random() * 1000);
 63                 second = (int) (Math.random() * 1000);
 64                 Formula formula = new Formula(first, "-", second);
 65                 if (first < second) {
 66                     int t = formula.getFirst();
 67                     formula.setFirst(formula.getSecond());
 68                     formula.setSecond(t);
 69                 }
 70                 a[10 + i].setText("(" + (i + 11) + ")" + formula.getFirst()
 71                         + formula.getSign() + formula.getSecond() + "=");
 72                 key[10 + i] = formula.getFirst() - formula.getSecond();
 73             }
 74             button2.setEnabled(true);
 75         }    
 76     } 
 77     
 78     class OnClickKeyButtonListener implements OnClickListener{
 79         @Override
 80         public void onClick(View v) {
 81             int count=0;
 82             for(int i=0;i<20;i++){
 83                 count++;
 84                 if(count%3==0){
 85                     textViewKey.append("\n");
 86                 }
 87                 textViewKey.append("("+(i+1)+")"+key[i]+"  ");
 88             }
 89             button2.setEnabled(false);
 90         }
 91     }
 92     
 93     @Override
 94     public boolean onCreateOptionsMenu(Menu menu) {
 95         getMenuInflater().inflate(R.menu.main, menu);
 96         return true;
 97     }
 98 
 99     @Override
100     public boolean onOptionsItemSelected(MenuItem item) {
101         int id = item.getItemId();
102         if (id == R.id.action_settings) {
103             return true;
104         }
105         return super.onOptionsItemSelected(item);
106     }
107 }

*写代码的过程里，学习到了使用数组批量引用ID

 

activity_main.xml：

  1 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  2     xmlns:tools="http://schemas.android.com/tools"
  3     android:layout_width="match_parent"
  4     android:layout_height="match_parent"
  5     android:paddingBottom="@dimen/activity_vertical_margin"
  6     android:paddingLeft="@dimen/activity_horizontal_margin"
  7     android:paddingRight="@dimen/activity_horizontal_margin"
  8     android:paddingTop="@dimen/activity_vertical_margin"
  9     tools:context="com.example.studentc.MainActivity" >
 10 
 11     <LinearLayout
 12         android:id="@+id/linearLayout1"
 13         android:layout_width="match_parent"
 14         android:layout_height="wrap_content"
 15         android:orientation="horizontal" >
 16 
 17         <LinearLayout
 18             android:layout_width="wrap_content"
 19             android:layout_height="wrap_content"
 20             android:layout_weight="1"
 21             android:orientation="vertical" >
 22 
 23             <TextView
 24                 android:id="@+id/textView1"
 25                 android:layout_width="match_parent"
 26                 android:layout_height="wrap_content"
 27                 android:layout_alignParentLeft="true"
 28                 android:layout_alignParentTop="true"
 29                 android:layout_marginBottom="3dp"
 30                 android:text=" "
 31                 android:textSize="16sp" />
 32 
 33             <TextView
 34                 android:id="@+id/textView2"
 35                 android:layout_width="match_parent"
 36                 android:layout_height="wrap_content"
 37                 android:layout_alignRight="@+id/textView1"
 38                 android:layout_below="@+id/textView1"
 39                 android:layout_marginBottom="3dp"
 40                 android:text=" "
 41                 android:textSize="16sp" />
 42 
 43             <TextView
 44                 android:id="@+id/textView3"
 45                 android:layout_width="match_parent"
 46                 android:layout_height="wrap_content"
 47                 android:layout_alignLeft="@+id/textView2"
 48                 android:layout_below="@+id/textView2"
 49                 android:layout_marginBottom="3dp"
 50                 android:text=" "
 51                 android:textSize="16sp" />
 52 
 53             <TextView
 54                 android:id="@+id/textView4"
 55                 android:layout_width="match_parent"
 56                 android:layout_height="wrap_content"
 57                 android:layout_alignRight="@+id/textView3"
 58                 android:layout_below="@+id/textView3"
 59                 android:layout_marginBottom="3dp"
 60                 android:text=" "
 61                 android:textSize="16sp" />
 62 
 63             <TextView
 64                 android:id="@+id/textView5"
 65                 android:layout_width="match_parent"
 66                 android:layout_height="wrap_content"
 67                 android:layout_alignRight="@+id/textView4"
 68                 android:layout_below="@+id/textView4"
 69                 android:layout_marginBottom="3dp"
 70                 android:text=" "
 71                 android:textSize="16sp" />
 72 
 73             <TextView
 74                 android:id="@+id/textView6"
 75                 android:layout_width="match_parent"
 76                 android:layout_height="wrap_content"
 77                 android:layout_alignRight="@+id/textView5"
 78                 android:layout_below="@+id/textView5"
 79                 android:layout_marginBottom="3dp"
 80                 android:text=" "
 81                 android:textSize="16sp" />
 82 
 83             <TextView
 84                 android:id="@+id/textView7"
 85                 android:layout_width="match_parent"
 86                 android:layout_height="wrap_content"
 87                 android:layout_alignLeft="@+id/textView6"
 88                 android:layout_below="@+id/textView6"
 89                 android:layout_marginBottom="3dp"
 90                 android:text=" "
 91                 android:textSize="16sp" />
 92 
 93             <TextView
 94                 android:id="@+id/textView8"
 95                 android:layout_width="match_parent"
 96                 android:layout_height="wrap_content"
 97                 android:layout_alignRight="@+id/textView7"
 98                 android:layout_below="@+id/textView7"
 99                 android:layout_marginBottom="3dp"
100                 android:text=" "
101                 android:textSize="16sp" />
102 
103             <TextView
104                 android:id="@+id/textView9"
105                 android:layout_width="match_parent"
106                 android:layout_height="wrap_content"
107                 android:layout_alignLeft="@+id/textView8"
108                 android:layout_below="@+id/textView8"
109                 android:layout_marginBottom="3dp"
110                 android:text=" "
111                 android:textSize="16sp" />
112 
113             <TextView
114                 android:id="@+id/textView10"
115                 android:layout_width="match_parent"
116                 android:layout_height="wrap_content"
117                 android:layout_alignLeft="@+id/textView9"
118                 android:layout_below="@+id/textView9"
119                 android:layout_marginBottom="3dp"
120                 android:text=" "
121                 android:textSize="16sp" />
122         </LinearLayout>
123 
124         <LinearLayout
125             android:layout_width="wrap_content"
126             android:layout_height="wrap_content"
127             android:layout_weight="1"
128             android:orientation="vertical" >
129 
130             <TextView
131                 android:id="@+id/textView11"
132                 android:layout_width="match_parent"
133                 android:layout_height="wrap_content"
134                 android:layout_alignParentLeft="true"
135                 android:layout_alignParentTop="true"
136                 android:layout_marginBottom="3dp"
137                 android:text=" "
138                 android:textSize="16sp" />
139 
140             <TextView
141                 android:id="@+id/textView12"
142                 android:layout_width="match_parent"
143                 android:layout_height="wrap_content"
144                 android:layout_alignRight="@+id/textView1"
145                 android:layout_below="@+id/textView1"
146                 android:layout_marginBottom="3dp"
147                 android:text=" "
148                 android:textSize="16sp" />
149 
150             <TextView
151                 android:id="@+id/textView13"
152                 android:layout_width="match_parent"
153                 android:layout_height="wrap_content"
154                 android:layout_alignLeft="@+id/textView2"
155                 android:layout_below="@+id/textView2"
156                 android:layout_marginBottom="3dp"
157                 android:text=" "
158                 android:textSize="16sp" />
159 
160             <TextView
161                 android:id="@+id/textView14"
162                 android:layout_width="match_parent"
163                 android:layout_height="wrap_content"
164                 android:layout_alignRight="@+id/textView3"
165                 android:layout_below="@+id/textView3"
166                 android:layout_marginBottom="3dp"
167                 android:text=" "
168                 android:textSize="16sp" />
169 
170             <TextView
171                 android:id="@+id/textView15"
172                 android:layout_width="match_parent"
173                 android:layout_height="wrap_content"
174                 android:layout_alignRight="@+id/textView4"
175                 android:layout_below="@+id/textView4"
176                 android:layout_marginBottom="3dp"
177                 android:text=" "
178                 android:textSize="16sp" />
179 
180             <TextView
181                 android:id="@+id/textView16"
182                 android:layout_width="match_parent"
183                 android:layout_height="wrap_content"
184                 android:layout_alignRight="@+id/textView5"
185                 android:layout_below="@+id/textView5"
186                 android:layout_marginBottom="3dp"
187                 android:text=" "
188                 android:textSize="16sp" />
189 
190             <TextView
191                 android:id="@+id/textView17"
192                 android:layout_width="match_parent"
193                 android:layout_height="wrap_content"
194                 android:layout_alignLeft="@+id/textView6"
195                 android:layout_below="@+id/textView6"
196                 android:layout_marginBottom="3dp"
197                 android:text=" "
198                 android:textSize="16sp" />
199 
200             <TextView
201                 android:id="@+id/textView18"
202                 android:layout_width="match_parent"
203                 android:layout_height="wrap_content"
204                 android:layout_alignRight="@+id/textView7"
205                 android:layout_below="@+id/textView7"
206                 android:layout_marginBottom="3dp"
207                 android:text=" "
208                 android:textSize="16sp" />
209 
210             <TextView
211                 android:id="@+id/textView19"
212                 android:layout_width="match_parent"
213                 android:layout_height="wrap_content"
214                 android:layout_alignLeft="@+id/textView8"
215                 android:layout_below="@+id/textView8"
216                 android:layout_marginBottom="3dp"
217                 android:text=" "
218                 android:textSize="16sp" />
219 
220             <TextView
221                 android:id="@+id/textView20"
222                 android:layout_width="match_parent"
223                 android:layout_height="wrap_content"
224                 android:layout_alignLeft="@+id/textView9"
225                 android:layout_below="@+id/textView9"
226                 android:layout_marginBottom="3dp"
227                 android:text=" "
228                 android:textSize="16sp" />
229         </LinearLayout>
230     </LinearLayout>
231     
232         <TextView
233         android:id="@+id/textView21"
234         android:layout_width="match_parent"
235         android:layout_height="wrap_content"
236         android:layout_alignLeft="@+id/linearLayout1"
237         android:layout_below="@+id/linearLayout1"
238         android:layout_margin="10dp"
239         android:text="   欢迎许佳懿小朋友来做算术!!!^0^" 
240         android:textSize="16sp"/>
241     
242     <RelativeLayout
243         android:layout_width="wrap_content"
244         android:layout_height="wrap_content"
245         android:layout_alignParentBottom="true"
246         android:layout_centerHorizontal="true" >
247 
248         <Button
249             android:id="@+id/button1"
250             android:layout_width="wrap_content"
251             android:layout_height="wrap_content"
252             android:text="生成" />
253 
254         <Button
255             android:id="@+id/button2"
256             android:layout_width="wrap_content"
257             android:layout_height="wrap_content"
258             android:layout_below="@id/button1"
259             android:text="答案" />
260     </RelativeLayout>
261 
262 </RelativeLayout>
View Code

 

Formula类：

 1 package com.example.studentc;
 2 
 3 public class Formula {
 4     private int first;
 5     private String sign;
 6     private int second;
 7     public Formula(){}
 8     public Formula(int first, String sign, int second){
 9         this.first = first;
10         this.sign = sign;
11         this.second = second;
12     }
13     public int getFirst() {
14         return first;
15     }
16     public void setFirst(int first) {
17         this.first = first;
18     }
19     public String getSign() {
20         return sign;
21     }
22     public void setSign(String sign) {
23         this.sign = sign;
24     }
25     public int getSecond() {
26         return second;
27     }
28 
29     public void setSecond(int second) {
30         this.second = second;
31     }
32 }

 

*在老爸的手机上试了下，发现内容装不下，差了些资料关于android实现上下滑动：

在布局最外包一层滚动条

<ScrollView
        android:id="@+id/scrollView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >
 
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical" >
        </LinearLayout>
    </ScrollView>

 

posted @ 2015-08-08 16:41  susyxu  阅读(390)  评论(0)    收藏  举报