android完成注册页面的下拉框及单复选框（1）

package com.example.dell.mylogin;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.EditText;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.Spinner;
import android.widget.TextView;


public class MainActivity extends AppCompatActivity implements View.OnClickListener {
    EditText etName,etPwd;
    TextView tvResult;
    RadioGroup rg;
    RadioButton rbMale,rbFemale;
    CheckBox chk1,chk2,chk3;
    Spinner spinner;
    Button btn;
    String sex="", hobby="", city="";
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.my_layout);
        
        init();
        radioButton();
        checkBox();
        spinner();
        btn.setOnClickListener(this);
    }
     //城市下拉框
    private void spinner() {
        spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                city = (String) spinner.getSelectedItem();
            }

            @Override
            public void onNothingSelected(AdapterView<?> parent) {

            }
        });
    }
    //单选框
    private void radioButton() {
        rg.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener(){
            public void onCheckedChanged(RadioGroup group, int i) {
                if(i== R.id.rbMale){
                    sex="男生";
                }
                else
                {
                    sex="女生";
                }
            }
        });
    }
    //复选框
    private void checkBox() {
        chk1.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                if(isChecked)
                {
                    hobby+= chk1.getText().toString()+" ";
                }

            }
        });
        chk2.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {

            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                if(isChecked)
                {
                    hobby+= chk2.getText().toString()+" ";
                }

            }
        });
        chk3.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {

            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                if(isChecked)
                {
                    hobby+= chk3.getText().toString()+" ";
                }
            }
        });
    }

    private void init() {
        etName=findViewById(R.id.etName);
        etPwd= findViewById(R.id.etPwd);
        tvResult= findViewById(R.id.tvResult);
        rg=findViewById(R.id.rg);
        rbMale= findViewById(R.id.rbMale);
        rbFemale=findViewById(R.id.rbFemale);
        chk1=findViewById(R.id.chk1);
        chk2=findViewById(R.id.chk2);
        chk3=findViewById(R.id.chk3);
        spinner=findViewById(R.id.spinner);
        btn=findViewById(R.id.btn);
    }
    public void onClick(View view) {
        //显示在本页面
//        String s="用户名："+etName.getText().toString()+"\n"
//                + "密码："+etPwd.getText().toString()+"\n"
//                +"性别："+sex+"\n"
//                +"爱好："+hobby+"\n"
//                + "居住城市："+city;
//        tvResult.setText(s);
        
        //跳转页面MYActivity
        Intent intent=new Intent(MainActivity.this,MyActivity.class);
        intent.putExtra("name",etName.getText().toString());
        intent.putExtra("pwd",etPwd.getText().toString());
        setResult(1,intent);
        finish();
    }
}