android 使用intent传递参数实现乘法计算

主界面上是两个EditText和一个按钮。用于输入两个数字参数。

calcute.xml：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:gravity="center">

<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:gravity="center"
>

<EditText
android:id="@+id/factory1"
android:layout_height="wrap_content"
android:layout_width="100dip"
/>
<TextView
android:layout_width="50dip"
android:layout_height="wrap_content"
android:text="X"
android:layout_marginLeft="30dip"
/>
<EditText
android:id="@+id/factory2"
android:layout_height="wrap_content"
android:layout_width="100dip"
/>
</LinearLayout>
<Button
android:id="@+id/calute"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="计算"
/>

</LinearLayout>

处理calcute的java程序

CaluteMain.java：

package com.example.wenandroid;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;

public class CaluteMain extends Activity {
private EditText factory1;
private EditText factory2;
private Button calute;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.calcute);
factory1=(EditText)findViewById(R.id.factory1);
factory2=(EditText)findViewById(R.id.factory2);
calute=(Button)findViewById(R.id.calute);
calute.setOnClickListener(new MyOnClickListener());
}
class MyOnClickListener implements OnClickListener{

@Override
public void onClick(View v) {
String factoryStr1=factory1.getText().toString();
String factoryStr2=factory2.getText().toString();
Intent intent=new Intent(CaluteMain.this,CaluteResult.class);
intent.putExtra("one", factoryStr1);
intent.putExtra("two", factoryStr2);
startActivity(intent);
}

}
}

计算结果的界面：caluteresult.xml：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/result"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
</LinearLayout>

接收两个数字参数并显示结果的Activity。CaluteResult.java：

package com.example.wenandroid;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.TextView;

public class CaluteResult extends Activity {
private TextView resultView;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.caluteresult);
resultView=(TextView)findViewById(R.id.result);
Intent intent=getIntent();
String factoryStr1=intent.getStringExtra("one");
String factoryStr2=intent.getStringExtra("two");
//将字符串转换为整形
int factoryInt1=Integer.parseInt(factoryStr1);
int factoryInt2=Integer.parseInt(factoryStr2);
int result=factoryInt1*factoryInt2;
resultView.setText("结果是："+result+"");

}

}