Android 实现页面跳转

android使用Intent来实现页面跳转，Intent通过startActivity(Intent intent)或startActivityForResult(Intent intent,int resquestCode)方法来启动Activity，在新建Intent对象时来指定从A页面跳到B页面，

比如：

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

Intent对象通过调用putExtra方法来传递页面跳转时所需要传递的信息

比如：

putExtra（“给需要传递的信息命名”，需要传递的信息的内容）

Intent通过调用getStringExtra方法来接受传递过来的信息

getStringExtra（“传递过来的信息的名字”）；

下面的代码将实现用户输入完信息之后点击登入按钮，页面将跳转到另一页面显示个人信息，然后在这个页面有一个返回按钮，点击返回按钮，页面将返回登入页面再次显示个人信息。

MainActivity.java

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);

}
}

MainActivity2.java

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();
}
});
}
}

test.xml

<?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>

activity_main2.xml

<?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>