加载中…Android开发之简单的四则运算器的程序
(2013-01-25 16:16:19)
标签：
android安卓计算器四则运算it |
分类： android |
http://s8/mw690/7256fe8fgd4188dfce097&690
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity"
android:orientation="vertical">
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
tools:context=".MainActivity"
android:orientation="horizontal">
<EditText
android:id="@+id/num1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="12px"
android:text="请输入第一个数字"/>
<TextView
android:id="@+id/tips"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=""/>
<EditText
android:id="@+id/num2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="12px"
android:text="请输入第二个数字"/>
<TextView
android:id="@+id/txt"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="="/>
<TextView
android:id="@+id/result"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="12px"
android:text="计算结果"/>
</LinearLayout>
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
tools:context=".MainActivity"
android:orientation="horizontal">
<Button
android:id="@+id/add"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="+"/>
<Button
android:id="@+id/sub"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="-"/>
<Button
android:id="@+id/mul"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="*"/>
<Button
android:id="@+id/div"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="/"/>
xml文件
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
</LinearLayout>
</LinearLayout>
.java文件
public class MainActivity
extends Activity {
private EditText
num1=null;
private EditText
num2=null;
private TextView
result=null;
//表示的是符号
private TextView
tips=null;
private Button
butAdd=null;
private Button
butSub=null;
private Button
butMul=null;
private Button
butDiv=null;
protected void onCreate(Bundle
savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
this.num1=(EditText)super.findViewById(R.id.num1);
this.num2=(EditText)super.findViewById(R.id.num2);
this.result=(TextView)super.findViewById(R.id.result);
this.tips=(TextView)super.findViewById(R.id.tips);
this.butAdd=(Button)super.findViewById(R.id.add);
this.butSub=(Button)super.findViewById(R.id.sub);
this.butMul=(Button)super.findViewById(R.id.mul);
this.butDiv=(Button)super.findViewById(R.id.div);
//增加监听
this.butAdd.setOnClickListener(new
AddListener());
this.butSub.setOnClickListener(new
SubListener());
this.butMul.setOnClickListener(new
MulListener());
this.butDiv.setOnClickListener(new
DivListener());
this.num1.setOnClickListener(new
OnClickListener() {
public void onClick(View v)
{
MainActivity.this.num1.setText("");
}
});
this.num2.setOnClickListener(new
OnClickListener() {
public void onClick(View v)
{
MainActivity.this.num2.setText("");
}
});
}
//加法操作
public class AddListener
implements OnClickListener{
int onenum=0;
int twonum=0;
public void onClick(View v)
{
onenum=Integer.parseInt(MainActivity.this.num1.getText().toString());
twonum=Integer.parseInt(MainActivity.this.num2.getText().toString());
MainActivity.this.tips.setText("+");
MainActivity.this.result.setText((onenum+twonum)+"");
}
}
//减法操作
public class SubListener
implements OnClickListener{
int onenum=0;
int twonum=0;
public void onClick(View v)
{
onenum=Integer.parseInt(MainActivity.this.num1.getText().toString());
twonum=Integer.parseInt(MainActivity.this.num2.getText().toString());
MainActivity.this.tips.setText("-");
MainActivity.this.result.setText((onenum-twonum)+"");
}
}
//乘法操作
public class MulListener
implements OnClickListener{
int onenum=0;
int twonum=0;
public void onClick(View v)
{
onenum=Integer.parseInt(MainActivity.this.num1.getText().toString());
twonum=Integer.parseInt(MainActivity.this.num2.getText().toString());
MainActivity.this.tips.setText("*");
MainActivity.this.result.setText((onenum*twonum)+"");
}
}
//除法操作
public class DivListener
implements OnClickListener{
int onenum=0;
int twonum=0;
public void onClick(View v)
{
onenum=Integer.parseInt(MainActivity.this.num1.getText().toString());
twonum=Integer.parseInt(MainActivity.this.num2.getText().toString());
MainActivity.this.tips.setText("/");
MainActivity.this.result.setText((onenum/twonum)+"");
}
}
}
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