ContentProvider备份短信，以xml文件存储

因为短信的内容已经通过ContentProvider暴露出来，所以我们可以直接用内容解析者获取短信内容。

想要获取短信内容，你需要知道的一些东西：

1、Uri uri = Uri.parse("content://sms/");

2、Cursor cursor = getContentResolver().query(uri,new String[]{"address","date","body"},null,null,null);

 

知道了这个就好获取短信的相关信息了

先看代码吧：

public void onClick(View v) {
        XmlSerializer serializer = Xml.newSerializer();
        File file = new File(Environment.getExternalStorageDirectory().getPath(),"smsbackup.xml");
        try {
            FileOutputStream outputStream =   new FileOutputStream(file);
            serializer.setOutput(outputStream, "utf-8");
            serializer.startDocument("utf-8",true);
            serializer.startTag(null,"smss");

            Uri uri = Uri.parse("content://sms/");
            Cursor cursor = getContentResolver().query(uri,new String[]{"address","date","body"},null,null,null);
            if (cursor!=null){
            while (cursor.moveToNext()){
                String address = cursor.getString(0);
                String date = cursor.getString(1);
                String body = cursor.getString(2);

                try {
                    //sms节点
                    serializer.startTag(null,"sms");
                    //address节点
                    serializer.startTag(null,"address");
                    serializer.text(address);
                    serializer.endTag(null,"address");
                    //date节点
                    serializer.startTag(null,"date");
                    serializer.text(date);
                    serializer.endTag(null,"date");
                    //body节点
                    serializer.startTag(null,"body");
                    serializer.text(body);
                    serializer.endTag(null,"body");

                    serializer.endTag(null,"sms");

                } catch (IOException e) {
                    e.printStackTrace();
                }
                System.out.println(address+"---"+date+"---"+body);
            }
        }
            serializer.endTag(null,"smss");
            serializer.endDocument();
            outputStream.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }

主要用内容解析者获取短信的信息和内容，然后用XmlSerializer存储。

下面是Manifest.xml：需要加上这三个权限

    <uses-permission android:name="android.permission.READ_SMS"/>
    <uses-permission android:name="android.permission.WRITE_SMS"/>
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>