手动生成XMl

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bean

public class Sms {    private int id;    private int type;    private String address;    private long date;    private String body;    public Sms() {        super();        // TODO Auto-generated constructor stub    }    public Sms(int id, int type, String address, long date, String body) {        super();        this.id = id;        this.type = type;        this.address = address;        this.date = date;        this.body = body;    }    public int getId() {        return id;    }    public void setId(int id) {        this.id = id;    }    public int getType() {        return type;    }    public void setType(int type) {        this.type = type;    }    public String getAddress() {        return address;    }    public void setAddress(String address) {        this.address = address;    }    public long getDate() {        return date;    }    public void setDate(long date) {        this.date = date;    }    public String getBody() {        return body;    }    public void setBody(String body) {        this.body = body;    }    @Override    public String toString() {        return "Sms [id=" + id + ", type=" + type + ", address=" + address                + ", date=" + date + ", body=" + body + "]";    }}

生成xml

public class MainActivity extends Activity implements OnClickListener {    List<Sms> list = new ArrayList<Sms>();    private Button back1;    private Button back2;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        init();        redSms();    }    // 初始化控件    private void init() {        back1 = (Button) findViewById(R.id.back1);        back2 = (Button) findViewById(R.id.back2);        back1.setOnClickListener(this);        back2.setOnClickListener(this);    }    @Override    public void onClick(View v) {        switch (v.getId()) {        case R.id.back1:            StringBuffer sb = new StringBuffer();            sb.append("<?xml version=\"1.0\" encoding=\"utf-8\"?>");            sb.append("<smss>");            for (Sms s : list) {                sb.append("<sms>");                sb.append("<date>");                sb.append(s.getDate());                sb.append("</date>");                sb.append("<type>");                sb.append(s.getType());                sb.append("</type>");                sb.append("<address>");                sb.append(s.getAddress());                sb.append("</address>");                sb.append("<body>");                sb.append(s.getBody());                sb.append("</body>");                sb.append("</sms>");            }            sb.append("</smss>");            try {                File file = new File(Environment.getExternalStorageDirectory(),                        "back.xml");                FileOutputStream out = new FileOutputStream(file);                out.write(sb.toString().getBytes());                Toast.makeText(this, "备份成功", 0).show();            } catch (IOException e) {                Toast.makeText(this, "备份失败", 0).show();                e.printStackTrace();            }            break;        case R.id.back2:            XmlSerializer serializer = Xml.newSerializer();            try {                File file = new File(Environment.getExternalStorageDirectory(),                        "back2.xml");                FileOutputStream out = new FileOutputStream(file);                serializer.setOutput(out, "utf-8");                // boolean 代表是否独立                serializer.startDocument("utf-8", true);                // 第一个参数代表命名空间                serializer.startTag(null, "smss");                for (Sms sms : list) {                    serializer.startTag(null, "sms");                    serializer.attribute(null, "id", sms.getId() + "");                    serializer.startTag(null, "date");                    serializer.text(sms.getDate() + "");                    serializer.endTag(null, "date");                    serializer.startTag(null, "type");                    serializer.text(sms.getType() + "");                    serializer.endTag(null, "type");                    serializer.startTag(null, "body");                    serializer.text(sms.getBody());                    serializer.endTag(null, "body");                    serializer.startTag(null, "address");                    serializer.text(sms.getAddress());                    serializer.endTag(null, "address");                    serializer.endTag(null, "sms");                }                serializer.endTag(null, "smss");                serializer.endDocument();                Toast.makeText(this, "备份成功", 0).show();            } catch (Exception e) {                Toast.makeText(this, "备份失败", 0).show();                e.printStackTrace();            }            break;        default:            break;        }    }    // 读取系统短信    private void redSms() {        ContentResolver contentResolver = getContentResolver();        Cursor cursor = contentResolver.query(Uri.parse("content://sms"),                new String[] { "type", "date", "body", "address" }, null, null,                null);        while (cursor.moveToNext()) {            int type = cursor.getInt(cursor.getColumnIndex("type"));            long date = cursor.getLong(cursor.getColumnIndex("date"));            String body = cursor.getString(cursor.getColumnIndex("body"));            String address = cursor.getString(cursor.getColumnIndex("address"));            list.add(new Sms(0, type, address, date, body));        }    }}

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