Service

package com.example.test;

import android.content.ComponentName;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.IBinder;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.RadioGroup;
import android.widget.TextView;

public class HeightActivity extends AppCompatActivity {
private Button mBt;
    private EditText mEt;
    private TextView mTv;
    private RadioGroup mRg;
    int sex=0;
    double height=0;
    private ServiceConnection coon=new ServiceConnection() {
        @Override
        public void onServiceConnected(ComponentName name, IBinder service) {
            HeightService.MyBinder binder= (HeightService.MyBinder) service;
            double result=binder.getResult();
            mTv.setText("你的标准体重是："+result+""+"kg");

        }

        @Override
        public void onServiceDisconnected(ComponentName name) {

        }
    };
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_height);
        mBt= (Button) findViewById(R.id.bt_height);
        mTv= (TextView) findViewById(R.id.tv_height);
        mEt= (EditText) findViewById(R.id.et_height);
        mRg= (RadioGroup) findViewById(R.id.rg_height);
        mRg.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(RadioGroup group, int checkedId) {
                switch (checkedId){
                    case R.id.ab_nan:
                        sex=0;
                        break;
                    case R.id.ab_nv:
                        sex=1;
                        break;
                }
            }
        });
        mBt.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent=new Intent(HeightActivity.this,HeightService.class);
                intent.putExtra("sex",sex);

                try {
                    height=Double.parseDouble(mEt.getText().toString()+"");
                }catch (Exception e){
                    mEt.setText("");
                    mEt.requestFocus();
                    return;
                }
                intent.putExtra("height",height);
                bindService(intent,coon,BIND_AUTO_CREATE);

            }
        });

    }
}

package com.example.test;

import android.app.Service;
import android.content.Intent;
import android.os.Binder;
import android.os.IBinder;
import android.support.annotation.Nullable;
import android.util.Log;

/**
 * Created by Administrator on 2016/10/28.
 */
public class HeightService extends Service {
double result=0;
    @Override
    public IBinder onBind(Intent intent) {
        int sex=intent.getIntExtra("sex",0);
        double height=intent.getDoubleExtra("height",0);
        calc(sex,height);
        return new MyBinder();
    }
    private void calc(int sex,double height){
        if (sex==0){
            result=(height-80)*0.7;
        }else {
            result=(height-70)*0.6;
        }
    }
    class MyBinder extends Binder{
        public double getResult(){
            return result;
        }
    }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:orientation="vertical"
    tools:context="com.example.test.HeightActivity">
    <LinearLayout
        android:layout_marginTop="50dp"
        android:gravity="center"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <TextView
            android:layout_gravity="center"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textSize="20sp"
            android:layout_marginLeft="40dp"
            android:text="性别："/>
        <RadioGroup
            android:id="@+id/rg_height"

            android:orientation="horizontal"
            android:layout_width="match_parent"
            android:layout_height="wrap_content">
            <RadioButton
                android:id="@+id/ab_nan"
                android:checked="true"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="男的"/>
            <RadioButton
                android:id="@+id/ab_nv"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="女的"/>
        </RadioGroup>
    </LinearLayout>
    <LinearLayout
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textSize="20sp"
            android:layout_marginLeft="40dp"
            android:text="身高："/>
        <EditText
            android:id="@+id/et_height"
            android:layout_width="100dp"
            android:layout_height="wrap_content" />
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="cm"
            android:textSize="20sp" />
    </LinearLayout>
    <Button
        android:layout_marginTop="20dp"
        android:layout_gravity="center"
        android:id="@+id/bt_height"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="计算"/>
    <TextView
        android:id="@+id/tv_height"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

</LinearLayout>