对于ContentResolver应用的一些小程序

//短信收集小应用

//首先创建一个文件对象，得到相应的存储路径
private File smsBackUpFile;
smsBackUpFile = new File(Environment.getExternalStorageDirectory(),
"sms.xml");

//然后创建一个序列化器，并初始化
XmlSerializer serializer = Xml.newSerializer();
//创建一个输出流对象，传入的参数是刚才的文件对象
FileOutputStream os = new FileOutputStream(smsBackUpFile);
//创建一个ContentResolver
ContentResolver contentResolver = getContentResolver();
//利用contentResolver对象的query方法去查询，结果用cursor去存储
Cursor cursor = contentResolver.query(
Uri.parse("content://sms"), new String[] { "address",
"date", "type", "body" }, null, null, null);
//调用moveToNext()方法获取数据
while (cursor.moveToNext()) {
String address = cursor.getString(0);
String date = cursor.getString(1);
String type = cursor.getString(2);
String body = cursor.getString(3);
}

//设置输出数据的格式
//编码格式
serializer.startDocument("utf-8", true);

serializer.startTag(null, "smss");

serializer.startTag(null, "sms");

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

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

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

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

serializer.endTag(null, "sms");

cursor.close();

serializer.endTag(null, "smss");
serializer.endDocument();
//关闭数据流，避免泄露
os.close();

//短信还原小应用

//创建ContentResolver对象
ContentResolver contentResolver = getContentResolver();
//创建ContentValues对象，其实就是一个容器，底层用MAP实现
ContentValues contentValues = new ContentValues();
//put数据进容器
contentValues.put("address", "110");
contentValues.put("date", System.currentTimeMillis());
contentValues.put("body", "中了五百万");
contentValues.put("type", "1");
//调用插入方法
contentResolver.insert(Uri.parse("content://sms"),
contentValues);