最近想写段Android程序玩玩。开发环境 Eclipse ,Android 2.2

开发环境搭建

1.先安装jdk

2.下载安装eclipse

3.下载安装android sdk

4.安装eclipse插件  adt

5.配置 Window > Preferences 中的android sdk路径

6.创建 AVD

实现方法很简单

1.把通讯录中的联系人，电话号码保存到txt文件中完成备份。

2.读取txt文件，导入到通讯录完成还原。

具体代码

1.添加 通讯录读写权限，存储卡写权限

2.写文件代码

File saveFile=new File("/sdcard/test.txt");

FileOutputStream outStream;

try {

outStream = new FileOutputStream(saveFile);

outStream.write(str.getBytes());

outStream.close();

} catch (Exception e) {

setTitle(e.toString());

}

3.取通讯录联系人

str="";

Cursor cur = getContentResolver().query(ContactsContract.Contacts.CONTENT_URI, null, null, null, null);

if (cur.moveToFirst()) {

int idColumn  = cur.getColumnIndex(ContactsContract.Contacts._ID);

int displayNameColumn = cur.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME);

do {

String contactId = cur.getString(idColumn);

String disPlayName = cur.getString(displayNameColumn);

str+=disPlayName;

int phoneCount = cur.getInt(cur.getColumnIndex(ContactsContract.Contacts.HAS_PHONE_NUMBER));

if(phoneCount>0){

Cursor phones = getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI,null,ContactsContract.CommonDataKinds.Phone.CONTACT_ID+ " = " + contactId, null, null);

int i=0;

String phoneNumber;

if(phones.moveToFirst()){

do{

i++;

phoneNumber= phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));

if(i==1)

str=str+","+phoneNumber;

System.out.println(phoneNumber);

}while(phones.moveToNext());

}

}

str+="\r\n";

} while (cur.moveToNext());

}

}

4.读文件代码

try {

File file = new File("/sdcard/test.txt");

FileInputStream inStream = new FileInputStream(file);

ByteArrayOutputStream outStream = new ByteArrayOutputStream();

byte[] buffer = new byte[1024*5];

int length = -1;

while((length = inStream.read(buffer)) != -1 ){

outStream.write(buffer, 0, length);

}

outStream.close();

inStream.close();

String txt= outStream.toString();

} catch (IOException e){

setTitle(e.toString());

}

5.写通讯录

ContentValues values = new ContentValues();

Uri rawContactUri = getContentResolver().insert(RawContacts.CONTENT_URI, values);

long rawContactId = ContentUris.parseId(rawContactUri);

values.clear();

values.put(Data.RAW_CONTACT_ID, rawContactId);

values.put(Data.MIMETYPE, StructuredName.CONTENT_ITEM_TYPE);

values.put(StructuredName.GIVEN_NAME, name);

getContentResolver().insert(Data.CONTENT_URI, values);

values.clear();

values.put(Data.RAW_CONTACT_ID, rawContactId);

values.put(Data.MIMETYPE, Phone.CONTENT_ITEM_TYPE);

values.put(Phone.NUMBER, num);

values.put(Phone.TYPE, Phone.TYPE_HOME);

getContentResolver().insert(Data.CONTENT_URI, values);

Android手机通讯录备份还原代码下载地址

具体下载目录在 /pub/Android源码集锦/2011年/11月/Android手机通讯录备份还原代码/