android 案例：从另一个activity选择信息并获取返回值
主窗口：
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); } } } }
第二个窗口（选择联系人窗口）：
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); } }
主窗口xml：
<?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>
选择联系人窗口xml：
<?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>
listView的item布局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"> <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>
string.xml
<?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>