android之有返回结果跳转intent

android之有返回结果跳转intent：

（1、注意跳转的时候要传像user的对象必须实现Serializable接口，2、login的java代码中setResult(RESULT_OK, intent);后一定要调用finish()方法）

主页面布局：layout/activity_main.xml：

</RelativeLayout>
主页面布局java代码：

package com.sxt.main;

import android.support.v7.app.ActionBarActivity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends ActionBarActivity {
private static final int LOGINCODE = 0;
private static final int REGISTER = 10;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setlistener();
}

private void setlistener() {
// TODO Auto-generated method stub
findViewById(R.id.btLogin).setOnClickListener(new OnClickListener() {

@Override
public void onClick(View view) {
// TODO Auto-generated method stub
Intent intent = new Intent(MainActivity.this,LoginActivity.class);
startActivityForResult(intent, LOGINCODE);
}
});
}

//这是跳转到另一个布局页面返回来的操作
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
super.onActivityResult(requestCode, resultCode, data);
if(resultCode!=RESULT_OK){
return;
}
switch (requestCode) {
case LOGINCODE:
User user = (User) data.getSerializableExtra("user");
Log.i("main", "注册信息是："+user);
Toast.makeText(this,"注册信息是："+user, 50000).show();
break;
case REGISTER:

break;
}
}

}

跳转到的登陆注册页面布局：

登陆页面布局：layout/activity_login.xml:

跳转到的登陆注册的java代码：

package com.sxt.main;

import android.support.v7.app.ActionBarActivity;
import android.text.TextUtils;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.EditText;

public class LoginActivity extends ActionBarActivity {
private EditText etUser,etPassword;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
init();
setListener();
}

private void setListener() {
// TODO Auto-generated method stub
findViewById(R.id.register).setOnClickListener(new OnClickListener() {

@Override
public void onClick(View view) {
// TODO Auto-generated method stub
String code = etUser.getText().toString();
if(TextUtils.isEmpty(code)){
etUser.setError("编号不能为空");
return;
}
String passw = etPassword.getText().toString();
if(TextUtils.isEmpty(passw)){
etPassword.setError("密码不能为空");
return;
}
Intent intent = new Intent(LoginActivity.this,MainActivity.class);
intent.putExtra("user", new User(code,passw));
setResult(RESULT_OK, intent);
finish();
}
});
findViewById(R.id.exit).setOnClickListener(new OnClickListener() {

@Override
public void onClick(View view) {
// TODO Auto-generated method stub
finish();
}
});
}

private void init() {
// TODO Auto-generated method stub
etUser = (EditText) findViewById(R.id.etUser);
etPassword = (EditText) findViewById(R.id.etPassword);

}
}
实体类User：

package com.sxt.main;

import java.io.Serializable;

public class User implements Serializable{
private String code;
private String password;
public String getCode() {
return code;
}
public void setCode(String code) {
this.code = code;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public User(String code, String password) {
super();
this.code = code;
this.password = password;
}
@Override
public String toString() {
// TODO Auto-generated method stub
return this.code+","+this.password;
}

}

效果：

第一步点击登陆：

第二步填写信息：

第3步登陆成功返回到原来的布局页面：

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