Android 实现页面跳转

Intent i = new Intent(A.this,B.class);这就表示从A页面跳到B页面， 

package com.example.hsy.register;
import android.content.Intent;
import android.support.annotation.IdRes;
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 {
EditText etName,etPwd;
Button btnLogin;
TextView tvShow;
RadioGroup rg;
RadioButton rbMale,rbFelMale;
CheckBox checkbox1,checkbox2,checkbox3;
Spinner spcity;
String sex="";
String hobby1="",hobby2="",hobby3="";
String result="";
String city="";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.test);
init();
rglistener();
btnloginlistener();
box1listener();
box2listener();
box3listener();
splistener();
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
tvShow.setText("返回结果是："+"n"+data.getStringExtra("result1").toString()+
"n");
}
private void splistener() {
spcity.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?  parent, View view, int position, long id) {
city=(String) spcity.getSelectedItem();
}
@Override
public void onNothingSelected(AdapterView<?  parent) {
}
});
}
private void box3listener() {
checkbox3.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if(isChecked){
hobby3="看书";
} else {
hobby3="";
}
}
});
}
private void box2listener() {
checkbox2.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if(isChecked){
hobby2="游泳";
} else {
hobby2="";
}
}
});
}
private void box1listener() {
checkbox1.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if(isChecked){
hobby1="唱歌";
} else {
hobby1="";
}
}
});
}
private void btnloginlistener() {
btnLogin.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v){
result="用户名是:"+etName.getText().toString()+"n"+"密码是:"+
etPwd.getText().toString()+"n"+"性别是:"+sex+"n"+"爱好是："+hobby1+" "
+hobby2+" "+hobby3+" "+
"n"+"所在城市："+city;
//tvShow.setText(result);
Intent i = new Intent(MainActivity.this,Main2Activity.class);
i.putExtra("data1",result);
startActivityForResult(i,0);
}
});
}
private void rglistener() {
rg.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener(){
@Override
public void onCheckedChanged(RadioGroup group, @IdRes int checkedId){
if(checkedId== R.id.rbMale)
sex="男生";
else
sex="女生";
}
});
}
private void init() {
etName=(EditText) findViewById(R.id.etName);
etPwd=(EditText) findViewById(R.id.etPwd);
btnLogin=(Button) findViewById(R.id.btnLogin);
tvShow=(TextView) findViewById(R.id.tvShow);
rg=(RadioGroup) findViewById(R.id.rg);
rbMale=(RadioButton) findViewById(R.id.rbMale);
rbFelMale=(RadioButton) findViewById(R.id.rbFeMale);
checkbox1=(CheckBox) findViewById(R.id.checkbox1);
checkbox2=(CheckBox) findViewById(R.id.checkbox2);
checkbox3=(CheckBox) findViewById(R.id.checkbox3);
spcity=(Spinner) findViewById(R.id.Spcity);
}
}

package com.example.hsy.register;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;
public class Main2Activity extends AppCompatActivity {
TextView tvShow;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
tvShow=(TextView)findViewById(R.id.tvShow);
Intent intent = getIntent();
tvShow.setText(intent.getStringExtra("data1").toString());
findViewById(R.id.btnBack).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent1=new Intent(Main2Activity.this,MainActivity.class);
intent1.putExtra("result1",tvShow.getText().toString());
setResult(1,intent1);
finish();
}
});
}
}

<?xml version="1.0" encoding="utf-8"? 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent" 
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal" 
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="用户名:"
android:layout_marginLeft="10dp"
android:layout_marginTop="10dp"
android:textSize="20dp"
android:textColor="@color/colorPrimaryDark"/ 
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:hint="输入2-10个字符"
android:layout_marginLeft="10dp"
android:layout_marginTop="10dp"
android:layout_weight="1"
android:id="@+id/etName"/ 
</LinearLayout 
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal" 
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="密  码:"
android:layout_marginLeft="10dp"
android:layout_marginTop="10dp"
android:textSize="20dp"
android:textColor="@color/colorPrimaryDark"/ 
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:hint="输入6-10个字符"
android:layout_marginLeft="10dp"
android:layout_marginTop="10dp"
android:layout_weight="1"
android:id="@+id/etPwd"/ 
</LinearLayout 
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal" 
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="选择性别:"
android:layout_marginTop="10dp"
android:layout_marginLeft="10dp"
android:textSize="20dp"
android:textColor="@color/colorPrimary"
/ 
<RadioGroup
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:id="@+id/rg" 
<RadioButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="15dp"
android:layout_marginTop="10dp"
android:textColor="@color/colorAccent"
android:textSize="10dp"
android:text="男"
android:id="@+id/rbMale"/ 
<RadioButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="15dp"
android:layout_marginTop="10dp"
android:textColor="@color/colorAccent"
android:textSize="10dp"
android:text="女"
android:id="@+id/rbFeMale"/ 
</RadioGroup 
</LinearLayout 
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" 
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:layout_marginTop="10dp"
android:textSize="20dp"
android:textColor="@color/colorAccent"
android:text="兴趣爱好:"/ 
<CheckBox
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:layout_marginTop="10dp"
android:textSize="15dp"
android:textColor="@color/colorAccent"
android:id="@+id/checkbox1"
android:text="唱歌"/ 
<CheckBox
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:layout_marginTop="10dp"
android:textSize="15dp"
android:textColor="@color/colorAccent"
android:id="@+id/checkbox2"
android:text="游泳"/ 
<CheckBox
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:layout_marginTop="10dp"
android:textSize="15dp"
android:textColor="@color/colorAccent"
android:id="@+id/checkbox3"
android:text="看书"/ 
</LinearLayout 
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" 
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="5dp"
android:layout_marginTop="6dp"
android:textSize="15dp"
android:text="所在地"/ 
<Spinner
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="6dp"
android:layout_marginLeft="10dp"
android:entries="@array/citys"
android:id="@+id/Spcity" 
</Spinner 
</LinearLayout 
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="登录"
android:layout_marginTop="10dp"
android:textSize="20dp"
android:id="@+id/btnLogin"/ 
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:text="显示信息"
android:id="@+id/tvShow"/ 
</LinearLayout 

<?xml version="1.0" encoding="utf-8"? 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="com.example.hsy.register.Main2Activity" 
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:layout_marginLeft="10dp"
android:text="显示结果"
android:id="@+id/tvShow"/ 
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:layout_marginTop="10dp"
android:text="返回结果"
android:id="@+id/btnBack"/ 
</LinearLayout