Android开发短信备份小例子
主要是使用内容提供者ContentProvider
#1.在activity_main.xml布局文件中添加写sdcard权限,并添加读短信的权限
<RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context=".MainActivity" > <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="50dp" android:layout_centerHorizontal="true" android:onClick="backupsms" android:text="备份短信" /> </RelativeLayout>
#2.MainActivity中内容如下
package com.wzw.backupsms; import java.io.FileOutputStream; import java.io.IOException; import java.util.ArrayList; import java.util.List; import org.xmlpull.v1.XmlSerializer; import com.wzw.backupsms.entity.SmsInfo; import android.net.Uri; import android.os.Bundle; import android.app.Activity; import android.content.ContentResolver; import android.database.Cursor; import android.util.Log; import android.util.Xml; import android.view.Menu; import android.view.View; import android.widget.Toast; public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } public void backupsms(View v){ Uri uri=Uri.parse("content://sms/"); ContentResolver resolver = getContentResolver(); Cursor cursor = resolver.query(uri, new String[]{"_id","address","date","type","body"}, null, null, null); if(cursor!=null&&cursor.getCount()>0){ List<SmsInfo> smsList=new ArrayList<SmsInfo>(); SmsInfo smsInfo; while(cursor.moveToNext()){ //控制游标指针,向下移一位 smsInfo=new SmsInfo(); smsInfo.setId(cursor.getInt(0)); //设置ID smsInfo.setAddress(cursor.getString(1)); //设置短信号码 smsInfo.setDate(cursor.getLong(2)); //设置短信时间 smsInfo.setType(cursor.getInt(3)); //设置短信类型 smsInfo.setBody(cursor.getString(4)); //设置短信内容 smsList.add(smsInfo); } cursor.close(); WriteToLocal(smsList); } } /** * 序列化到本地 */ private void WriteToLocal(List<SmsInfo> smsList){ XmlSerializer serializer=Xml.newSerializer(); try { FileOutputStream fos=new FileOutputStream("/mnt/sdcard/sms.xml"); serializer.setOutput(fos, "utf-8"); serializer.startDocument("utf-8", true); serializer.startTag(null, "smss"); for (SmsInfo smsInfo : smsList) { serializer.startTag(null, "sms"); serializer.attribute(null, "id",String.valueOf(smsInfo.getId())); //写地址 serializer.startTag(null, "address"); serializer.text(smsInfo.getAddress()); serializer.endTag(null, "address"); //写类型 serializer.startTag(null, "type"); serializer.text(String.valueOf(smsInfo.getType())); serializer.endTag(null, "type"); //写时间 serializer.startTag(null, "date"); serializer.text(String.valueOf(smsInfo.getDate())); serializer.endTag(null, "date"); //写内容 serializer.startTag(null, "body"); serializer.text(smsInfo.getBody()); serializer.endTag(null, "body"); serializer.endTag(null, "sms"); } serializer.endTag(null, "smss"); serializer.endDocument(); Toast.makeText(this, "恭喜你,备份成功!", 0).show(); } catch (Exception e) { Toast.makeText(this, "我去,备份失败!", 0).show(); e.printStackTrace(); } } }
#3.写入的结果
<smss> <sms id="3"> <address>10086</address> <type>1</type> <date>1406446124317</date> <body>just for test!</body> </sms> <sms id="2"> <address>110</address> <type>1</type> <date>1406446024971</date> <body>world</body> </sms> <sms id="1"> <address>5556</address> <type>1</type> <date>1406446006018</date> <body>hello</body> </sms> </smss>
记录安卓开发点点滴滴。。
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