结对编程-四则运算
2016-04-09 13:28
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结对对象:马巍乃(学号:2013110426)博客地址:http://www.cnblogs.com/vshow/
结对编程贡献:1:1.
源代码:
MainActivity.java
package com.example.mldemo;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
public class MainActivity extends Activity {
private EditText num;
private Button start;
private int num2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
num=(EditText) findViewById(R.id.editText1);
start=(Button) findViewById(R.id.button1);
// num2=Integer.parseInt(num.getText().toString());//循环次数
start.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
num2=Integer.parseInt(num.getText().toString());//循环次数
Intent intent=new Intent(MainActivity.this, SecondActivity.class);
intent.putExtra("data", num2);
startActivity(intent);
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
secondActivity.java
package com.example.mldemo;
import java.util.ArrayList;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.ListView;
public class SecondActivity extends Activity {
private ArrayList<String> operations=new ArrayList<String>();
private ArrayAdapter<String> numadapter;
private ListView lv;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_second);
// 取出mainactivity传递过来的数据
Intent intent = getIntent();
int num2 = intent.getIntExtra("data", -1);
lv = (ListView) findViewById(R.id.listView1);
for (int i = 0; i < num2; i++) {
operations.add(operation());
}
numadapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, operations);
lv.setAdapter(numadapter);
}
public String operation() {
int randomNum1; // 随机数第一个值
int randomNum2; // 随机数第二个值
String operation = null;
int operator;// 运算符
operator = (int) (Math.random() * 4);
randomNum1 = (int) (Math.random() * 100 + 1);
randomNum2 = (int) (Math.random() * 100 + 1);
// 通过if语句判断
if (operator == 0) {
operation = (randomNum1 + "+" + randomNum2 + "=").toString();
}
if (operator == 1) {
operation = (randomNum1 + "-" + randomNum2 + "=").toString();
}
if (operator == 2) {
operation = (randomNum1 + "*" + randomNum2 + "=").toString();
}
if (operator == 3) {
operation = (randomNum1 + "/" + randomNum2 + "=").toString();
}
return operation;
}
}
通过本次的学习,让我对结对编程的概念有了新的认识和体会,也让我的编码能力更加深了,我感到特别开心,么么哒
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