安卓笔记之查询、备份、插入系统短信数据库

package com.example.day0328_getsms;

import java.io.File;
import java.io.FileOutputStream;
import java.util.ArrayList;
import java.util.List;
import org.xmlpull.v1.XmlSerializer;
import android.net.Uri;
import android.os.Bundle;
import android.app.Activity;
import android.content.ContentResolver;
import android.content.ContentValues;
import android.database.Cursor;
import android.util.Log;
import android.util.Xml;
import android.view.View;

public class MainActivity extends Activity {
    List<Message> list;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        list = new ArrayList<Message>();
    }
    public void click(View v){
        //获取内容解析器
        ContentResolver cr = getContentResolver();
        //content://sms可以理解为短信主机名
        Cursor cursor =cr.query(Uri.parse("content://sms"), new String[]{"address","date","body","type"}, 
                null, null, null);
        //查询
        while(cursor.moveToNext()){
            String address = cursor.getString(cursor.getColumnIndex("address"));
            long date = cursor.getLong(cursor.getColumnIndex("date"));
            String body = cursor.getString(cursor.getColumnIndex("body"));
            String type = cursor.getString(cursor.getColumnIndex("type"));
            //测试一下查询结果
            Log.i("aa", address+","+date+","+body+","+type);
            //用一个Javbean把数据封装到Message里面
            Message message = new Message(address, date, body, type);
            //添加到集合List里面
            list.add(message);
        }
    }
    public void click2(View v){
        //获取Xml寄存器
        XmlSerializer xs = Xml.newSerializer();
        //创建一个文件
        File file = new File(getCacheDir(), "sms.xml");
        //拿到它的文件输出流
        FileOutputStream fos=null;
        try {
            fos = new FileOutputStream(file);
            //告诉寄存器对象写到哪里并指定其编码
            xs.setOutput(fos, "UTF-8");
            //开始节点
            xs.startDocument("UTF-8", true);
            //开始标签
            xs.startTag(null, "message");
            //遍历message
            for(Message sms :list){
                xs.startTag(null, "sms");
                xs.startTag(null, "address");
                xs.text(sms.getAddress());
                xs.endTag(null, "address");
                xs.startTag(null, "date");
                xs.text(sms.getDate()+"");
                xs.endTag(null, "date");
                xs.startTag(null, "body");
                xs.text(sms.getBody());
                xs.endTag(null, "body");
                xs.startTag(null, "type");
                xs.text(sms.getType());
                xs.endTag(null, "type");
                xs.endTag(null, "sms");
                
            }
            //结束标签
            xs.endTag(null, "message");
            //结束节点
            xs.endDocument();
            
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } 
        
    }
    public void click3(View v){
        //拿到内容解析器
        ContentResolver cr = getContentResolver();
        //拿到Contentvalus对象并插入内容
        ContentValues vaulus = new ContentValues();
        vaulus.put("address", "10086");
        vaulus.put("date", System.currentTimeMillis());
        vaulus.put("body", "你好，你尾号为xxx的建设银行卡收到了来自xxx转发的1,000,000RMB,请注意查收");
        cr.insert(Uri.parse("content://sms"), vaulus);
    }
}
//权限
android.permission.READ_SMS
android.permission.WRITE_SMS
//布局
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity" >

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="获取系统短信" 
        android:onClick="click"/>
    <Button 
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="备份系统短信" 
        android:onClick="click2"
        
        />
    <Button 
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="插入短信" 
        android:onClick="click3"
        
        />
</LinearLayout>