Android手机软件开发简单计算功能一例

<pre name="code" class="java">//Android手机软件开发简单计算功能一例 //应用界面 //res/layout/cal.xml //------------------------------------------------- <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/RelativeLayout1" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <EditText android:id="@+id/cal_et_one" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" android:inputType="numberDecimal" > <requestFocus /> </EditText> <TextView android:id="@+id/cal_textview" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_below="@+id/cal_et_one" android:text="乘以" /> <RadioGroup android:id="@+id/radioGroup1" android:layout_width="wrap_content" android:layout_height="wrap_content" > </RadioGroup> <RadioButton android:id="@+id/cal_rb_sheng" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBaseline="@+id/cal_textview" android:layout_alignBottom="@+id/cal_textview" android:layout_toRightOf="@+id/cal_tv_result_display" android:checked="true" android:clickable="true" android:text="乘以" /> <RadioButton android:id="@+id/cal_rb_div" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBaseline="@+id/cal_rb_sheng" android:layout_alignBottom="@+id/cal_rb_sheng" android:layout_marginLeft="43dp" android:layout_toRightOf="@+id/cal_rb_sheng" android:text="除以" /> <EditText android:id="@+id/cal_et_two" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_below="@+id/cal_textview" android:inputType="number" /> <Button android:id="@+id/cal_btn_cal" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_below="@+id/cal_et_two" android:text="开始计算" /> <TextView android:id="@+id/cal_tv_result_display" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_below="@+id/cal_btn_cal" android:text="结果为:" /> <TextView android:id="@+id/cal_tv_result" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_below="@+id/cal_tv_result_display" /> </RelativeLayout> //源代码 //cal.java //------------------------------------------------------------------------------- package LC.HelloWorld; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.TextView; import android.widget.EditText; import android.widget.RadioButton; //定义一个简单计算类 public class cal extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.cal); //添加计算按钮事件 Button btn_cal=(Button)this.findViewById(R.id.cal_btn_cal); btn_cal.setOnClickListener(new MycalOnClickListener()); //mule RadioButton rbMul=(RadioButton)this.findViewById(R.id.cal_rb_sheng); rbMul.setOnClickListener(new MyMulOnClickListener()); //dive RadioButton rbDiv=(RadioButton)this.findViewById(R.id.cal_rb_div); rbDiv.setOnClickListener(new MyDivOnClickListener()); } //定义计算按钮事件 class MycalOnClickListener implements android.view.View.OnClickListener { @Override public void onClick(View v) { //获取参数一 EditText et_one=(EditText)cal.this.findViewById(R.id.cal_et_one); String one=et_one.getText().toString(); //获取参数二 EditText et_two=(EditText)cal.this.findViewById(R.id.cal_et_two); String two=et_two.getText().toString(); //获取运算符 boolean IsMul=true,IsDiv=false; RadioButton rb_mul=(RadioButton)cal.this.findViewById(R.id.cal_rb_sheng); RadioButton rb_div=(RadioButton)cal.this.findViewById(R.id.cal_rb_div); IsMul=rb_mul.isChecked(); IsDiv=rb_div.isChecked(); //开始运算 int result=0; if(IsMul==true) result=Integer.parseInt(one)*Integer.parseInt(two); if(IsDiv==true) result=Integer.parseInt(one)/Integer.parseInt(two); //显示结束 TextView tv=(TextView)cal.this.findViewById(R.id.cal_tv_result); tv.setText(result+""); } } class MyMulOnClickListener implements android.view.View.OnClickListener { @Override public void onClick(View v) { //获取运算符 boolean IsMul=false; RadioButton rb_mul=(RadioButton)cal.this.findViewById(R.id.cal_rb_sheng); RadioButton rb_div=(RadioButton)cal.this.findViewById(R.id.cal_rb_div); IsMul=rb_mul.isChecked(); if(IsMul==true) { rb_div.setChecked(false); } } } class MyDivOnClickListener implements android.view.View.OnClickListener { @Override public void onClick(View v) { boolean IsDiv=false; RadioButton rb_mul=(RadioButton)cal.this.findViewById(R.id.cal_rb_sheng); RadioButton rb_div=(RadioButton)cal.this.findViewById(R.id.cal_rb_div); IsDiv=rb_div.isChecked(); if(IsDiv==true) { rb_mul.setChecked(false); } } } // } //2011-11-17 //vp:hsg