android_备份还原通讯录

package cn.m15.helper.logic;

 

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

 

import android.content.ContentResolver;

import android.content.Context;

import android.content.Intent;

import android.content.res.AssetFileDescriptor;

import android.database.Cursor;

import android.net.Uri;

import android.os.Environment;

import android.provider.ContactsContract;

 

public class ContactsSyncer extends Syncer {

 

    public void backup(Context context) {

        ContentResolver cr = context.getContentResolver();

        Cursor cur = cr.query(ContactsContract.Contacts.CONTENT_URI, null,

                null, null, null);

        int index = cur.getColumnIndex(ContactsContract.Contacts.LOOKUP_KEY);

        FileOutputStream fout;

        try {

            fout = new FileOutputStream(

                    Environment.getExternalStorageDirectory() + "/go.vcf");

            byte[] data = new byte[1024 * 1];

            while (cur.moveToNext()) {

                String lookupKey = cur.getString(index);

                Uri uri = Uri.withAppendedPath(

                        ContactsContract.Contacts.CONTENT_VCARD_URI, lookupKey);

                AssetFileDescriptor fd = context.getContentResolver()

                        .openAssetFileDescriptor(uri, "r");

                FileInputStream fin = fd.createInputStream();

                int len = -1;

                while ((len = fin.read(data)) != -1) {

                    fout.write(data, 0, len);

                }

                fin.close();

            }

            fout.close();

        } catch (Exception e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        }

    }

 

    public void restore(Context context, String filename) {

        Intent intent = new Intent();

        intent.setPackage("com.android.contacts");

        Uri uri = Uri.fromFile(new File(filename));

        intent.setAction(Intent.ACTION_VIEW);

        intent.setDataAndType(uri, "text/x-vcard");

        context.startActivity(intent);

    }

}