android 案例：从另一个activity选择信息并获取返回值

package com.example.test;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.View;
import android.widget.EditText;

public class MyActivity extends Activity {
//两个联系人号码填写框
private EditText phoneEditText;
private EditText phoneEditText2;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
phoneEditText = (EditText) findViewById(R.id.et_phone);
phoneEditText2 = (EditText) findViewById(R.id.et_phone2);
}

/**
* 点击“选择联系人”进入选择第一个联系人的界面
*/
public void selectContact(View view) {
Intent intent = new Intent(this, SelectContactActivity.class);
this.startActivityForResult(intent, 1);
}

/**
* 点击“选择联系人”进入选择第二个联系人的界面
*/
public void selectContact2(View view) {
Intent intent = new Intent(this, SelectContactActivity.class);
this.startActivityForResult(intent, 2);
}

/**
* 当第二个activity选择完成，在退出的时候会调用这个方法
* @param requestCode 请求码
* @param resultCode 结果码
* @param data 包含用户选择的值的intent对象
*/
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (data != null) {
String phone = data.getStringExtra("phone");
if (requestCode == 1) {
phoneEditText.setText(phone);
} else if (requestCode == 2) {
phoneEditText2.setText(phone);
}
}
}
}

package com.example.test;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.*;

import java.util.ArrayList;
import java.util.List;

/**
* Created by Administrator on 14-1-1.
*/
public class SelectContactActivity extends Activity {
private ListView listView;
private List<Person> personList = new ArrayList<Person>();

public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.select_contact_layout);

this.listView = (ListView) findViewById(R.id.lv_contact);
initListData();//初始化测试数据
this.listView.setAdapter(adapter);
this.listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
//创建一个intent用于向上一个activity传递数据
Intent intent = new Intent();
Person person = personList.get(i);
intent.putExtra("phone", person.getPhone());
setResult(0, intent);
finish();
}
});
}

private ListAdapter adapter = new BaseAdapter() {
@Override
public int getCount() {
return personList.size();
}

@Override
public Object getItem(int i) {
return null;
}

@Override
public long getItemId(int i) {
return 0;
}

@Override
public View getView(int i, View view, ViewGroup viewGroup) {
Person currentPerson  = personList.get(i);
View itemView = View.inflate(getApplicationContext(), R.layout.contact_item, null);
TextView nameView = (TextView) itemView.findViewById(R.id.tv_name);
TextView phoneView = (TextView) itemView.findViewById(R.id.tv_phone);
nameView.setText(currentPerson.getName());
phoneView.setText(currentPerson.getPhone());
return itemView;
}
};

/**
* 为程序提供测试数据
*/
private void initListData() {
Person person = new Person();
person.setName("张三");
person.setPhone("127836874");
this.personList.add(person);

person = new Person();
person.setName("李四");
person.setPhone("675698436");
this.personList.add(person);

person = new Person();
person.setName("王五");
person.setPhone("079456897");
this.personList.add(person);
}
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>

<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical"
>

<TextView android:text="@string/tv_select_contact"
android:layout_alignParentLeft="true"
android:paddingLeft="10dp"
android:paddingTop="10dp"
android:textSize="19sp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>

<Button android:text="@string/button_select"
android:onClick="selectContact"
android:layout_alignParentRight="true"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>

</RelativeLayout>

<EditText
android:id="@+id/et_phone"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="text"/>

<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical"
>

<TextView android:text="@string/tv_select_contact2"
android:layout_alignParentLeft="true"
android:paddingLeft="10dp"
android:paddingTop="10dp"
android:textSize="19sp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>

<Button android:text="@string/button_select"
android:onClick="selectContact2"
android:layout_alignParentRight="true"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>

</RelativeLayout>

<EditText
android:id="@+id/et_phone2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="text"/>

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">

<ListView
android:id="@+id/lv_contact"
android:layout_width="match_parent"
android:layout_height="match_parent">
</ListView>
</LinearLayout>

<?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">

<TextView
android:id="@+id/tv_name"
android:text="姓名"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>

<TextView
android:id="@+id/tv_phone"
android:text="电话号码"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="app_name">案例：从另一个activity选择并返回值</string>
<string name="button_select">选择联系人</string>
<string name="tv_select_contact">输入或选择号码1：</string>
<string name="tv_select_contact2">输入或选择号码2</string>
</resources>