package com.example.demo;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.EditText;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.Spinner;

public class MainActivity extends Activity {

private EditText account;
private EditText psw;
private RadioGroup gender;
private Spinner classroom;
private Button loginButton;
private CheckBox ck1;
private CheckBox ck2;
private CheckBox ck3;

private String myac;
private String mypsw;
private String mygender;
private String myclassroom;

private int ckTag1 = 0;
private int ckTag2 = 0;
private int ckTag3 = 0;

private String toastMsg;

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

}

private void init() {
    account = (EditText) this.findViewById(R.id.account);
    psw = (EditText) this.findViewById(R.id.psw);
    gender = (RadioGroup) this.findViewById(R.id.gender);
    classroom = (Spinner) this.findViewById(R.id.classroom);
    loginButton = (Button) this.findViewById(R.id.loginBtn);
    ck1 = (CheckBox) this.findViewById(R.id.ck1);
    ck2 = (CheckBox) this.findViewById(R.id.ck2);
    ck3 = (CheckBox) this.findViewById(R.id.ck3);

    ck1.setOnCheckedChangeListener(ckListener);
    ck2.setOnCheckedChangeListener(ckListener);
    ck3.setOnCheckedChangeListener(ckListener);

    gender.setOnCheckedChangeListener(genderListener);
    loginButton.setOnClickListener(loginBtnListener);

}

OnCheckedChangeListener ckListener = new OnCheckedChangeListener() {

    @Override
    public void onCheckedChanged(CompoundButton arg0, boolean arg1) {
        if (ck1.isChecked()) {
            ckTag1 = 1;
        }
        if (!ck1.isChecked()) {
            ckTag1 = 0;
        }
        if (ck2.isChecked()) {
            ckTag2 = 1;
        }
        if (!ck2.isChecked()) {
            ckTag2 = 0;
        }
        if (ck3.isChecked()) {
            ckTag3 = 1;
        }
        if (!ck3.isChecked()) {
            ckTag3 = 0;
        }

    }
};

android.widget.RadioGroup.OnCheckedChangeListener genderListener = new android.widget.RadioGroup.OnCheckedChangeListener() {

    @Override
    public void onCheckedChanged(RadioGroup arg0, int arg1) {
        int id = arg0.getCheckedRadioButtonId();
        RadioButton rad = (RadioButton) findViewById(id);
        mygender = rad.getText().toString();
    }
};

OnClickListener loginBtnListener = new OnClickListener() {
    @Override
    public void onClick(View arg0) {
        if (arg0.getId() == R.id.loginBtn) {
            StringBuffer sa = new StringBuffer();
            if (ckTag1 == 1) {
                sa.append(ck1.getText().toString()).append(",");
            }
            if (ckTag2 == 1) {
                sa.append(ck2.getText().toString()).append(",");

            }
            if (ckTag3 == 1) {
                sa.append(ck3.getText().toString()).append(",");

            }
            toastMsg = sa.toString().substring(0,
                    sa.toString().length() - 1);
        }
    }

};

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

}

<RelativeLayout 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"
    tools:context=".MainActivity" >

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center"
        android:orientation="vertical" >

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

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="账号" />

            <EditText
                android:id="@+id/account"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:hint="请输入账号" />
        </LinearLayout>

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

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="密码" />

            <EditText
                android:id="@+id/psw"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:hint="请输入密码" />
        </LinearLayout>

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

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="性别" />

            <RadioGroup
                android:id="@+id/gender"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:orientation="horizontal" >

                <RadioButton
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="男" />

                <RadioButton
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="男" />
            </RadioGroup>
        </LinearLayout>

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

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="爱好" />

            <CheckBox
                android:id="@+id/ck1"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="唱" />

            <CheckBox
                android:id="@+id/ck2"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="跳" />

            <CheckBox
                android:id="@+id/ck3"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Rap" />
        </LinearLayout>

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

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="班级" />

            <Spinner
                android:id="@+id/classroom"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content" />
        </LinearLayout>

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

            <Button
                android:id="@+id/loginBtn"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="登录" />
        </LinearLayout>
    </LinearLayout>

</RelativeLayout>