Android(安卓)- ContactPicker(选择联系人) 详解

ContactPicker(选择联系人) 详解

本文地址:http://blog.csdn.net/caroline_wendy/article/details/21629357

Android API:http://developer.android.com/reference/android/content/Intent.html

ContactPicker:用户可以选择一个联系人.

1. 创建ContactPicker活动(Activity)

位置: java->package-> ContactPicker.java

package mzx.spike.contactpicker.app;import android.app.Activity;import android.content.ContentUris;import android.content.Intent;import android.database.Cursor;import android.net.Uri;import android.os.Bundle;import android.provider.ContactsContract;import android.view.View;import android.widget.AdapterView;import android.widget.ListView;import android.widget.SimpleCursorAdapter;/** * Created by C.L.Wang on 14-3-20. */public class ContactPicker extends Activity {    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        final Cursor c = getContentResolver().query(                ContactsContract.Contacts.CONTENT_URI, null, null, null, null        );        String[] from = new String[]{ContactsContract.Contacts.DISPLAY_NAME_PRIMARY};        int[] to = new int[]{R.id.itemTextView};        SimpleCursorAdapter adapter = new SimpleCursorAdapter(this, R.layout.listitemlayout, c, from, to, 0);        ListView lv = (ListView)findViewById(R.id.contactListView);        lv.setAdapter(adapter);        lv.setOnItemClickListener(new ListView.OnItemClickListener(){            public void onItemClick(AdapterView<?> parent, View view, int pos, long id) {                c.moveToPosition(pos);                int rowId = c.getInt(c.getColumnIndexOrThrow("_id"));                Uri outURI = ContentUris.withAppendedId(ContactsContract.Contacts.CONTENT_URI, rowId);                Intent outData = new Intent();                outData.setData(outURI);                setResult(Activity.RESULT_OK, outData);                finish();            }        });    }}

详解:

1. 创建一个活动继承Activity, 显示activity_main界面;

2. 创建游标Cursor遍历存储在联系人列表中的联系人;

3. 构造简单游标适配器(SimpleCursorAdapter), 注意此方法标记为遗弃, 后面需要加上参数0, 版本SDK11+;

4. 将适配器绑定至ListView, setAdapter();

5. 添加项目点击事件(setOnItemClickListener), 将游标移植点击位置, 取出rowID, 构造URI, 将URI绑定至Intent,;

6. 返回结果, setResult(), 结果码(Activity_RESULT_OK) 和 Intent;

2. 修改activity_main.xml

位置: res->layout->activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    android:paddingBottom="@dimen/activity_vertical_margin">    <ListView android:id="@+id/contactListView"        android:layout_width="match_parent"        android:layout_height="wrap_content"    /></RelativeLayout>

添加ListView, ContactPicker会调用此布局(layout);

3. 创建listitemlayout.xml

位置: res->layout->listitemlayout.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/itemTextView"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:padding="10dp"        android:textSize="16dp"        android:textColor="#F0F"    /></LinearLayout>

TextView显示ListView中的每一个联系人,ContactPicker会调用此布局(layout);

4. 创建测试布局contactpickertester.xml

位置: res->layout->contactpickertester.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/selected_contact_textview"        android:layout_width="match_parent"        android:layout_height="wrap_content"    />    <Button        android:id="@+id/pick_contact_button"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="Pick Contact"    /></LinearLayout>

TextView显示选择的联系人,Button选择按钮, 启动界面;

5. 创建测试类ContactPickerTester.java

位置: java->package->ContactPickerTester.java

package mzx.spike.contactpicker.app;import android.app.Activity;import android.content.Intent;import android.database.Cursor;import android.net.Uri;import android.os.Bundle;import android.provider.ContactsContract;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.widget.Button;import android.widget.TextView;/** * Created by Administrator on 14-3-20. */public class ContactPickerTester extends Activity {    public static final int PICK_CONTACT = 1;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.contactpickertester);        Button button = (Button)findViewById(R.id.pick_contact_button);        button.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                Intent intent = new Intent(Intent.ACTION_PICK, Uri.parse("content://contacts/"));                startActivityForResult(intent, PICK_CONTACT);            }        });    }    @Override    public void onActivityResult(int reqCode, int resCode, Intent data) {        super.onActivityResult(reqCode, resCode, data);        switch (reqCode) {            case (PICK_CONTACT) : {                if (resCode == Activity.RESULT_OK) {                    Uri contactData = data.getData();                    Cursor c = getContentResolver().query(contactData,null, null, null, null);                    c.moveToFirst();                    String name = c.getString(c.getColumnIndexOrThrow(ContactsContract.Contacts.DISPLAY_NAME_PRIMARY));                    c.close();                    TextView tv = (TextView)findViewById(R.id.selected_contact_textview);                    tv.setText(name);                }            }            default: break;        }    }}

1. 在onCreate()方法内, 重写按键监听事件(button.setOnClickListene());

2. 在onClick()方法中, 指定Intent.ACTION_PICK动作, 和联系人数据库("content://contacts/");

3. 重写onActivityResult()事件, 处理动作返回值, reqCode, 请求码, resCode, 结果码, data, Intent数据;

4. 提取数据, 更新ViewText的内容;

6. 修改Manifest, 进行注册

位置: root->AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="mzx.spike.contactpicker.app" >    <uses-permission android:name="android.permission.READ_CONTACTS"/>    <application        android:allowBackup="true"        android:icon="@drawable/ic_launcher"        android:label="@string/app_name"        android:theme="@style/AppTheme" >        <activity            android:name=".ContactPicker"            android:label="@string/app_name" >            <intent-filter>                <action android:name="android.intent.action.PICK" />                <category android:name="android.intent.category.DEFAULT" />                <data android:path="contacts" android:scheme="content"/>            </intent-filter>        </activity>        <activity android:name=".ContactPickerTester"            android:label="Contact Picker Test">            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>            </activity>    </application></manifest>

1. 注册ContactPicker, intent-filter, 动作PICK, 种类DEFAULT(默认动作);

2. 注册ContactPickerTester, 启动(MAIN)程序;

7. 运行程序

代码下载:http://download.csdn.net/detail/u012515223/7072781