团队成员：陈淑筠、杨家安、陈曦
团队选题：小学四则运算APP
第二次冲刺阶段时间：11.29~12.09
本次发布的是已完成的功能二（选择题）：
ChoiceActivity.java：
package com.example.calculator; import java.util.Random; import android.os.Bundle;
import android.app.ActionBar;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.RadioButton;
import android.widget.TextView;
import android.widget.Toast; public class ChoiceActivity extends Activity {
private TextView text1,text2,text3;
private CheckBox checkbox1,checkbox2,checkbox3,checkbox4;
private Button btn; private final Random num1=new Random();
private final Random num2=new Random();
private final Random num3=new Random();
private final Random r = new Random();
private int x1;
private int x2;
private int x3; private char[] ch={'+','-','*','/'}; //字符数组
private int index = r.nextInt(ch.length); //随机数，小于数组的长度数, 0~3
private char d=ch[index]; @Override
protected void onCreate(Bundle savedInstanceState) {
ActionBar actionBar=getActionBar();
actionBar.setDisplayShowHomeEnabled(true);
actionBar.setDisplayHomeAsUpEnabled(true);
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_choice);
text1=(TextView)findViewById(R.id.textView1);
text2=(TextView)findViewById(R.id.textView2);
text3=(TextView)findViewById(R.id.textView3); checkbox1=(CheckBox)findViewById(R.id.checkBox1);
checkbox2=(CheckBox)findViewById(R.id.checkBox2);
checkbox3=(CheckBox)findViewById(R.id.checkBox3);
checkbox4=(CheckBox)findViewById(R.id.checkBox4);
btn=(Button)findViewById(R.id.button1); final String a=String.valueOf(num1.nextInt(100));
x1=Integer.valueOf(a);
final String b=String.valueOf(num2.nextInt(100));
x2=Integer.valueOf(b);
final String c=String.valueOf(num3.nextInt(100));
final String e=String.valueOf(d); text1.setText(a);
text3.setText(b);
text2.setText(e); checkbox1.setText(a);
checkbox2.setText(b);
checkbox4.setText(c); if(index==0){
x3=x1+x2;
final String h=String.valueOf(x3);
checkbox3.setText(h);
}
if(index==1){
x3=x1-x2;
final String h=String.valueOf(x3);
checkbox3.setText(h);
}
if(index==2){
x3=x1*x2;
final String h=String.valueOf(x3);
checkbox3.setText(h);
}
if(index==3){
x3=x1/x2;
final String h=String.valueOf(x3);
checkbox3.setText(h);
} btn.setOnClickListener(new OnClickListener() {
final String h=String.valueOf(x3);
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
if(checkbox3.isChecked()){
Toast.makeText(ChoiceActivity.this, "正确", Toast.LENGTH_SHORT).show();
}
if(!(checkbox3.isChecked())){
Toast.makeText(ChoiceActivity.this, "错误"+h, Toast.LENGTH_SHORT).show();
}
}
}); } @Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.choice, menu);
return true;
} @Override
public boolean onOptionsItemSelected(MenuItem item) {
// TODO Auto-generated method stub
switch (item.getItemId()) {
case android.R.id.home:
//创建启动MainActivity的Intent
Intent intent=new Intent(this,TypesActivity.class);
//添加额外的Flag，将Activity栈中处于MainActivity之上的Activity弹出
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
break; default:
break;
}
return super.onOptionsItemSelected(item);
} }
activity_choice.xml：
<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:background="@drawable/animal"
tools:context=".ChoiceActivity" > <TextView
android:id="@+id/textView1"
android:layout_width="50dp"
android:layout_height="wrap_content"
android:layout_marginTop="100dp" /> <TextView
android:id="@+id/textView2"
android:layout_width="30dp"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/textView1"
android:layout_alignBottom="@+id/textView1"
android:layout_toRightOf="@+id/textView1" /> <TextView
android:id="@+id/textView3"
android:layout_width="50dp"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/textView2"
android:layout_alignBottom="@+id/textView2"
android:layout_toRightOf="@+id/textView2" /> <TextView
android:id="@+id/textView4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/textView3"
android:layout_alignBottom="@+id/textView3"
android:layout_toRightOf="@+id/textView3"
android:text="=" /> <CheckBox
android:id="@+id/checkBox2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/checkBox1"
android:layout_below="@+id/checkBox1"
android:layout_marginTop="14dp" /> <CheckBox
android:id="@+id/checkBox3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/checkBox2"
android:layout_below="@+id/checkBox2"
android:layout_marginTop="17dp" /> <CheckBox
android:id="@+id/checkBox1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true" /> <CheckBox
android:id="@+id/checkBox4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/button1"
android:layout_alignLeft="@+id/checkBox3" /> <Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:text="确定" /> </RelativeLayout>
运行结果：
按“选择题练习”按钮后：
选择正确答案后显示正确：
选择错误答案后显示错误：
虽然功能实现了，可是界面还不美观，继续完善！