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"/>