自制Android中的短息備份器源碼

短信的實體bean

package com.examp.backsms.domain;

public class SmsInfo {
	private String address;
	private String date;
	private String type;
	private String body;

	public SmsInfo() {
	}

	public SmsInfo(String address, String date, String type, String body) {
		this.address = address;
		this.date = date;
		this.type = type;
		this.body = body;
	}

	public String getAddress() {
		return address;
	}

	public void setAddress(String address) {
		this.address = address;
	}

	public String getDate() {
		return date;
	}

	public void setDate(String date) {
		this.date = date;
	}

	public String getType() {
		return type;
	}

	public void setType(String type) {
		this.type = type;
	}

	public String getBody() {
		return body;
	}

	public void setBody(String body) {
		this.body = body;
	}

	@Override
	public String toString() {
		return "SmsInfo [address=" + address + ", date=" + date + ", type="
				+ type + ", body=" + body + "]";
	}

}

核心代碼

package com.examp.backsms;

import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.content.ContentResolver;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;

import com.examp.backsms.domain.SmsInfo;
import com.examp.backsms.util.SmsUtils;

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    public void backSms(View view) {

        // 創建被叫主機名
        Uri uri = Uri.parse("content://sms/");
        // 獲取內容解析器
        ContentResolver resolver = getContentResolver();
        // 執行查詢,得到結果集
        Cursor cursor = resolver.query(uri, new String[] { "address", "date",
                "type", "body" }, null, null, null);
         //創建短信的集合
         List infos = new ArrayList();
         //逐一添加到集合
         while (cursor.moveToNext()) {
            SmsInfo info = new SmsInfo();
            info.setAddress(cursor.getString(cursor.getColumnIndex("address")));
            info.setBody(cursor.getString(cursor.getColumnIndex("body")));
            info.setDate(cursor.getString(cursor.getColumnIndex("date")));
            info.setType(cursor.getString(cursor.getColumnIndex("type")));
            infos.add(info);
        }
        //通過工具類調用備份的業務
        //將集合|本活動的上下文傳入
         SmsUtils.backupSms(infos, this);
        cursor.close();
    }

}

工具類

package com.examp.backsms.util;

import java.io.File;
import java.io.FileOutputStream;
import java.util.List;

import org.xmlpull.v1.XmlSerializer;

import android.content.Context;
import android.os.Environment;
import android.util.Xml;
import android.widget.Toast;

import com.examp.backsms.domain.SmsInfo;

public class SmsUtils {
	public static void backupSms(List smsInfos, Context context) {
		try {
			// 創建XML序列化器
			XmlSerializer serializer = Xml.newSerializer();
			File file = new File(Environment.getExternalStorageDirectory(),
					"backupSms.xml");
			FileOutputStream os = new FileOutputStream(file);
			// 初始化xml序列化器,指定xml數據寫入到那個文件,並且制定文件的編碼方式
			serializer.setOutput(os, "utf-8");
			// 設置,及是否是獨立的xml文件
			serializer.startDocument("utf-8", true);
			// 相當於
			serializer.startTag(null, "smss");
			for (SmsInfo info : smsInfos) {
				serializer.startTag(null, "sms");

				serializer.startTag(null, "body");
				serializer.text(info.getBody());
				serializer.endTag(null, "body");

				serializer.startTag(null, "type");
				serializer.text(info.getType() + "");
				serializer.endTag(null, "type");

				serializer.startTag(null, "address");
				serializer.text(info.getAddress());
				serializer.endTag(null, "address");

				serializer.startTag(null, "date");
				serializer.text(info.getDate() + "");
				serializer.endTag(null, "date");

				serializer.endTag(null, "sms");
			}
			serializer.endTag(null, "smss");
			serializer.endDocument();
			os.close();
			Toast.makeText(
					context,
					"備份短信成功,備份儲存路徑為:"
							+ Environment.getExternalStorageDirectory()
							+ "backSms.xml", Toast.LENGTH_SHORT).show();
		} catch (Exception e) {
			Toast.makeText(context, "備份短信息失敗!!", Toast.LENGTH_SHORT).show();
			e.printStackTrace();
		}
	}
}

視圖代碼,由於只是一個案例,只有一個按鈕

權限清單文件

資源文件string.xml

    0019短信備份
    Settings
    備份短信

注:本代碼只是事例代碼,不能夠承受過大的數據壓力,所以實際開發的時候是邊讀數據邊備份.