<?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:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:orientation="vertical"
    tools:context="com.example.pengtuanyuan.personcalculate.MainActivity">

    <EditText
        android:id="@+id/ed_name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:hint="請輸入姓名"/>


    <RadioGroup
        android:layout_marginTop="20dp"
        android:id="@+id/rdg_group"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <RadioButton
            android:id="@+id/rb_female"
            android:layout_weight="1"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:text="女"/>

        <RadioButton
            android:layout_marginLeft="20dp"
            android:id="@+id/rb_male"
            android:layout_weight="1"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:text="男"/>

        <RadioButton
            android:layout_marginLeft="20dp"
            android:id="@+id/rb_other"
            android:layout_weight="1"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:text="人妖"/>

    </RadioGroup>

    <Button
        android:layout_marginTop="20dp"
        android:id="@+id/bt_calculate"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="計算"/>
</LinearLayout>
----------------------------------------------------------

<?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/resultName"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Union"/>

    <TextView
        android:id="@+id/resultSex"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="男"/>
    <TextView
        android:id="@+id/resultContext"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="你的人品好的不得了"/>

</LinearLayout>
--------------------------------------------------------

package com.example.pengtuanyuan.personcalculate;

import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.text.TextUtils;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.RadioGroup;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    private EditText ed_name;
    private RadioGroup rdg_group;
    private Button bt_calculate;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ed_name = (EditText) findViewById(R.id.ed_name);
        rdg_group = (RadioGroup) findViewById(R.id.rdg_group);
        bt_calculate = (Button) findViewById(R.id.bt_calculate);

        bt_calculate.setOnClickListener(this);

    }

    @Override
    public void onClick(View v) {


        String name = ed_name.getText().toString().trim();
        if (TextUtils.isEmpty(name)) {
            Toast.makeText(getApplicationContext(), "用戶名不能為空", Toast.LENGTH_SHORT).show();
            return;
        }
        int checkedRadioButtonId = rdg_group.getCheckedRadioButtonId();
        int sex = 0;

        switch (checkedRadioButtonId) {
            case R.id.rb_female:
                sex = 1;
                break;
            case R.id.rb_male:
                sex = 2;
                break;
            case R.id.rb_other:
                sex = 3;
                break;
            default:
                break;
        }
        if (sex == 0) {

            Toast.makeText(getApplicationContext(), "親，請你要選擇性別喔", Toast.LENGTH_SHORT).show();
        }
        Intent intent=new Intent(this,ResultActivity.class);
        startActivity(intent);

    }
}
--------------------------------------------------------------
package com.example.pengtuanyuan.personcalculate;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.TextView;

public class ResultActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_result);

        TextView resultName= (TextView) findViewById(R.id.resultName);
        TextView resultSex= (TextView) findViewById(R.id.resultSex);
        TextView resultContext= (TextView) findViewById(R.id.resultContext);
    }
}