手机卫士08-获取手机联系人

首先，我把把昨天忘记了的两张设置向导的图片放出来先

我们从上面的第一张图片可以看到，我们有一个选择联系人这一操作，那么怎样才能获取到手机里面的联系人呢，其实方法有很多的，现在我们来讲一下我们这个项目里面用到的方法

其实要想知道怎样获取手机里面的联系人，去看一下Android自己的源码就知道的了

我们只要把platform/packages/providers/ContactsProvider这一部分的内容下载下来看看就可以的啦

下面是我下载之后，打开里面的AndroidManifest的内容

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.android.providers.contacts"
android:sharedUserId="android.uid.shared"
android:sharedUserLabel="@string/sharedUserLabel">
<permission
android:name="com.android.voicemail.permission.READ_WRITE_ALL_VOICEMAIL"
android:label="@string/read_write_all_voicemail_label"
android:description="@string/read_write_all_voicemail_description"
android:permissionGroup="android.permission-group.PERSONAL_INFO"
android:protectionLevel="signature"
/>
<uses-permission android:name="android.permission.READ_CONTACTS" />
<uses-permission android:name="android.permission.WRITE_CONTACTS" />
<uses-permission android:name="android.permission.GET_ACCOUNTS" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.BIND_DIRECTORY_SEARCH" />
<uses-permission android:name="android.permission.UPDATE_APP_OPS_STATS" />
<uses-permission android:name="android.permission.READ_SYNC_SETTINGS" />
<uses-permission android:name="com.android.voicemail.permission.ADD_VOICEMAIL" />
<uses-permission android:name="com.android.voicemail.permission.READ_WRITE_ALL_VOICEMAIL" />
<application android:process="android.process.acore"
android:label="@string/app_label"
android:icon="@drawable/app_icon"
android:allowBackup="false">
<provider android:name="ContactsProvider2"
android:authorities="contacts;com.android.contacts"
android:label="@string/provider_label"
android:multiprocess="false"
android:exported="true"
android:readPermission="android.permission.READ_CONTACTS"
android:writePermission="android.permission.WRITE_CONTACTS">
<path-permission
android:pathPrefix="/search_suggest_query"
android:readPermission="android.permission.GLOBAL_SEARCH" />
<path-permission
android:pathPrefix="/search_suggest_shortcut"
android:readPermission="android.permission.GLOBAL_SEARCH" />
<path-permission
android:pathPattern="/contacts/.*/photo"
android:readPermission="android.permission.GLOBAL_SEARCH" />
<grant-uri-permission android:pathPattern=".*" />
</provider>
<provider android:name="CallLogProvider"
android:authorities="call_log"
android:syncable="false" android:multiprocess="false"
android:exported="true"
android:readPermission="android.permission.READ_CALL_LOG"
android:writePermission="android.permission.WRITE_CALL_LOG">
</provider>
<provider android:name="VoicemailContentProvider"
android:authorities="com.android.voicemail"
android:syncable="false" android:multiprocess="false"
android:exported="true"
android:permission="com.android.voicemail.permission.ADD_VOICEMAIL">
</provider>
<receiver android:name="ContactsUpgradeReceiver">
<!-- This broadcast is sent after the core system has finished
booting, before the home app is launched or BOOT_COMPLETED
is sent. -->
<intent-filter>
<action android:name="android.intent.action.PRE_BOOT_COMPLETED"/>
</intent-filter>
</receiver>
<receiver android:name="PackageIntentReceiver">
<intent-filter>
<action android:name="android.intent.action.PACKAGE_ADDED" />
<data android:scheme="package" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.PACKAGE_REPLACED" />
<data android:scheme="package" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.PACKAGE_REMOVED" />
<data android:scheme="package" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.PACKAGE_CHANGED" />
<data android:scheme="package" />
</intent-filter>
</receiver>
<receiver android:name="LocaleChangeReceiver">
<intent-filter>
<action android:name="android.intent.action.LOCALE_CHANGED"/>
</intent-filter>
</receiver>
<service android:name="VoicemailCleanupService"/>
<activity android:name=".debug.ContactsDumpActivity"
android:label="@string/debug_dump_title"
android:theme="@android:style/Theme.Holo.Dialog"
>
<intent-filter>
<action android:name="com.android.providers.contacts.DUMP_DATABASE"/>
<category android:name="android.intent.category.DEFAULT"/>
</intent-filter>
</activity>
<provider android:name=".debug.DumpFileProvider"
android:authorities="com.android.contacts.dumpfile"
android:exported="true">
</provider>
</application>
</manifest>

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我们可以看一下第一个provider，里面就有我们想要的uri还有它已经写好了的类了，各位有兴趣的可以去看一下是如何实现的，其实我们要获取的东西，都是存放在一个数据库里面的，我们不妨把那个数据库拿出来看一下，拿到那个数据库也很简单，只要在Eclipse里面的ddms界面里面，在右上边那个contacts2.db就是我们想要的东西啦我们可以把它导出来，然后用SQLite
Database browser来打开它获取手机里面的联系人，我们只要关注三个表就可以啦，一个是raw_contacts data还有一个mime_type这三个表就行啦mime_type存放的就是一些类型，是电话，还是短信，还是E-mail这些data就是存放一些数据的东西raw_contacts就是存放一些命名什么的这三个表的关系就是下面一样的啦从上面的可以看到，我们可以通过raw_contacts拿到那个id还有display_name然后就去data那里找到对应的raw_contact_id，这样就可以获得对应的数据啦，然后还可以通过mimetype_id在mime_type表里面找出想要的类型好啦，原理就是这样啦，下面我们来看一下代码怎么写我们先要用一个model类来存放我们的数据com.xiaobin.security.domain.ContactInfo

package com.xiaobin.security.domain;
public class ContactInfo
{
private String name;
private String phone;
public String getName()
{
return name;
}
public void setName(String name)
{
this.name = name;
}
public String getPhone()
{
return phone;
}
public void setPhone(String phone)
{
this.phone = phone;
}
}

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然后呢，我们就可以写我们获得手机联系人的代码啦新建一个类com.xiaobin.security.engine.ContactInfoService

package com.xiaobin.security.engine;
import java.util.ArrayList;
import java.util.List;
import android.content.ContentResolver;
import android.content.Context;
import android.database.Cursor;
import android.net.Uri;
import com.xiaobin.security.domain.ContactInfo;
public class ContactInfoService
{
private Context context;
public ContactInfoService(Context context)
{
this.context = context;
}
public List<ContactInfo> getContactInfos()
{
List<ContactInfo> infos = new ArrayList<ContactInfo>();
ContactInfo info;
ContentResolver contentResolver = context.getContentResolver();
//在源码的AndroidManifest里面可以看到这些uri
Uri uri = Uri.parse("content://com.android.contacts/raw_contacts");
Uri dataUri = Uri.parse("content://com.android.contacts/data");
Cursor cursor = contentResolver.query(uri, null, null, null, null);
while(cursor.moveToNext())
{
info = new ContactInfo();
String id = cursor.getString(cursor.getColumnIndex("_id"));
String name = cursor.getString(cursor.getColumnIndex("display_name"));
info.setName(name);
//通过raw_contacts里面的id拿到data里面对应的数据
Cursor dataCursor = contentResolver.query(dataUri, null, "raw_contact_id = ? ", new String[] {id}, null);
while(dataCursor.moveToNext())
{
String type = dataCursor.getString(dataCursor.getColumnIndex("mimetype"));
//根据类型，只要电话这种类型的数据
if(type.equals("vnd.android.cursor.item/phone_v2"))
{
String number = dataCursor.getString(dataCursor.getColumnIndex("data1"));//拿到数据
info.setPhone(number);
}
}
dataCursor.close();
infos.add(info);
info = null;
}
cursor.close();
return infos;
}
}

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因为我们是点击按钮，然后打开一个activity，然后选择好了之后，再把值返回到原来的activity那里的，所以我们就要用到startActivityForResult这个方法啦好，我们来看一下setup_guide3这个向导页面的逻辑是怎样写的com.xiaobin.security.ui.SetupGuide3Activity

package com.xiaobin.security.ui;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import com.xiaobin.security.R;
public class SetupGuide3Activity extends Activity implements OnClickListener
{
private Button bt_next;
private Button bt_pervious;
private Button bt_select;
private EditText et_phoneNumber;
private SharedPreferences sp;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.setup_guide3);
sp = getSharedPreferences("config", Context.MODE_PRIVATE);
bt_next = (Button) findViewById(R.id.bt_guide_next);
bt_pervious = (Button) findViewById(R.id.bt_guide_pervious);
bt_select = (Button) findViewById(R.id.bt_guide_select);
bt_next.setOnClickListener(this);
bt_pervious.setOnClickListener(this);
bt_select.setOnClickListener(this);
et_phoneNumber = (EditText) findViewById(R.id.et_guide_phoneNumber);
}
//重写这个方法，从acitivty里面拿到数据
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
super.onActivityResult(requestCode, resultCode, data);
//resultCode是乃至区分拿到的activity是从那一个activity里面拿到的
if(data != null)
{
String number = data.getStringExtra("number");
et_phoneNumber.setText(number);
}
}
@Override
public void onClick(View v)
{
switch(v.getId())
{
case R.id.bt_guide_select :
Intent selectIntent = new Intent(this, SelectContactActivity.class);
//启动一个activity来获取数据，获取到的数据是在重写的onActivityResult这个方法里面拿到的
startActivityForResult(selectIntent, 1);
break;
case R.id.bt_guide_next :
String number = et_phoneNumber.getText().toString().trim();
if(number.equals(""))
{
Toast.makeText(this, "安全号码不能为空", Toast.LENGTH_SHORT).show();
}
else
{
Editor editor = sp.edit();
editor.putString("number", number);
editor.commit();
Intent intent = new Intent(this, SetupGuide4Activity.class);
finish();
startActivity(intent);
//这个是定义activity切换时的动画效果的
overridePendingTransition(R.anim.translate_in, R.anim.translate_out);
}
break;
case R.id.bt_guide_pervious :
Intent i = new Intent(this, SetupGuide2Activity.class);
finish();
startActivity(i);
//这个是定义activity切换时的动画效果的
overridePendingTransition(R.anim.alpha_in, R.anim.alpha_out);
break;
default :
break;
}
}
}

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我们还要新建一个类用来做为选择的呢com.xiaobin.security.ui.SelectContactActivity

package com.xiaobin.security.ui;
import java.util.List;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.TextView;
import com.xiaobin.security.R;
import com.xiaobin.security.domain.ContactInfo;
import com.xiaobin.security.engine.ContactInfoService;
public class SelectContactActivity extends Activity
{
private ListView lv;
private List<ContactInfo> infos;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.select_contact);
infos = new ContactInfoService(this).getContactInfos();
lv = (ListView) findViewById(R.id.lv_select_contact);
lv.setAdapter(new SelectContactAdapter());
lv.setOnItemClickListener(new OnItemClickListener()
{
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id)
{
String number = infos.get(position).getPhone();
Intent intent = new Intent();
intent.putExtra("number", number);
//把要返回的数据设置进去，便通过onActivityResult(int, int, Intent)拿到
setResult(1, intent);
finish();
}
});
}
//=================================================================================
private class SelectContactAdapter extends BaseAdapter
{
@Override
public int getCount()
{
return infos.size();
}
@Override
public Object getItem(int position)
{
return infos.get(position);
}
@Override
public long getItemId(int position)
{
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent)
{
ContactInfo info = infos.get(position);
View view;
ContactViews views;
if(convertView == null)
{
views = new ContactViews();
view = View.inflate(SelectContactActivity.this, R.layout.contact_item, null);
views.tv_name = (TextView) view.findViewById(R.id.tv_contact_name);
views.tv_number = (TextView) view.findViewById(R.id.tv_contact_number);
views.tv_name.setText("联系人：" + info.getName());
views.tv_number.setText("联系电话：" + info.getPhone());
view.setTag(views);
}
else
{
view = convertView;
}
return view;
}
}
private class ContactViews
{
TextView tv_name;
TextView tv_number;
}
}

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这个类是非常简单的，只有一个listView大家也可以看到，这个类里面有一个adapter，这个是为了方便，所以写在里面的，而且那个listview我们也用到了上一次的优化方法如果有什么不了解的，可以回去看一下我们前面的那个Android项目实战--手机卫士06--GridView的优化与修改Button的显示样式好啦，下面是activity的布局文件，还有listview的布局文件select_contact.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"
android:background="@android:color/white"
android:orientation="vertical" >
<ListView
android:id="@+id/lv_select_contact"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>