Android短信备份及数据插入实现代码解析
实现备份短信到xml文件和像短信中插入一条数据
一、实现短信将备份到xml文件中
在布局文件中定义一个按钮,定义点击事件为copyClick
MainActivity.java:
packagecom.lgqrlchinese.heima76android_copysms; importandroid.Manifest; importandroid.content.pm.PackageManager; importandroid.database.Cursor; importandroid.net.Uri; importandroid.os.Environment; importandroid.support.v4.app.ActivityCompat; importandroid.support.v4.content.ContextCompat; importandroid.support.v7.app.AppCompatActivity; importandroid.os.Bundle; importandroid.util.Xml; importandroid.view.View; importandroid.widget.Toast; importorg.xmlpull.v1.XmlSerializer; importjava.io.File; importjava.io.FileNotFoundException; importjava.io.FileOutputStream; importjava.io.IOException; publicclassMainActivityextendsAppCompatActivity{ //动态获取权限 staticfinalString[]PERMISSION=newString[]{ Manifest.permission.READ_SMS, Manifest.permission.WRITE_EXTERNAL_STORAGE, }; @Override protectedvoidonCreate(BundlesavedInstanceState){ super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //动态获取权限 MyPermission(); } //点击按钮查询短信数据库内容,然后备份 publicvoidcopyClick(Viewview){ try{ //获取xml序列化实例 XmlSerializerserializer=Xml.newSerializer(); //设置序列化参数 Filefile=newFile(Environment.getExternalStorageDirectory().getPath(),"smsBackUp.xml"); FileOutputStreamfos=newFileOutputStream(file); serializer.setOutput(fos,"utf-8"); //开始写xml文档的开头 serializer.startDocument("utf-8",true); //开始写根节点 serializer.startTag(null,"smss"); //短信数据库内容也通过内容提供者暴露出来,所以我们只需要通过内容解析者去操作数据库 Uriuri=Uri.parse("content://sms/"); Cursorcursor=getContentResolver().query(uri,newString[]{"address","date","body"},null,null,null); while(cursor.moveToNext()){ Stringaddress=cursor.getString(0); Stringdate=cursor.getString(1); Stringbody=cursor.getString(2); //写sms节点 serializer.startTag(null,"sms"); //写address节点 serializer.startTag(null,"address"); serializer.text(address); serializer.endTag(null,"address"); //写body节点 serializer.startTag(null,"body"); serializer.text(body); serializer.endTag(null,"body"); //写date节点 serializer.startTag(null,"date"); serializer.text(date); serializer.endTag(null,"date"); serializer.endTag(null,"sms"); } serializer.endTag(null,"smss"); serializer.endDocument(); }catch(FileNotFoundExceptione){ e.printStackTrace(); System.out.println("异常1"); }catch(IOExceptione){ e.printStackTrace(); System.out.println("异常2"); } } //动态获取权限 publicvoidMyPermission(){ if(ContextCompat.checkSelfPermission(this,Manifest.permission.READ_CONTACTS)!=PackageManager.PERMISSION_GRANTED){ //Android6.0申请权限 ActivityCompat.requestPermissions(this,PERMISSION,1); }else{ Toast.makeText(this,"成功",Toast.LENGTH_SHORT).show(); } } }
当然权限是必要的
这样就在SD卡根目录备份了xml文件
在真机6.0测试中遇到存储address崩溃问题,调试好久。先打印addredss,没有问题;存储死数据没有问题,最后发现在输出打印室有个address为null。查看手机,是因为有个短信草稿,我想了两个都能想到的的解决办法:
1.删除或发送手机里的草稿
2.在代码中进行判断
if(address!=null){ serializer.startTag(null,"address"); serializer.text(address); serializer.endTag(null,"address"); }else{ serializer.text("这是草稿"); }
二、向短信的数据库中插入数据(5.0及之后就不允许外部应用修改,直允许读取,不做过多记录)
importandroid.Manifest; importandroid.content.ContentValues; importandroid.content.pm.PackageManager; importandroid.net.Uri; importandroid.support.v4.app.ActivityCompat; importandroid.support.v4.content.ContextCompat; importandroid.support.v7.app.AppCompatActivity; importandroid.os.Bundle; importandroid.view.View; importandroid.widget.Toast; publicclassMainActivityextendsAppCompatActivity{ //动态获取权限 staticfinalString[]PERMISSION=newString[]{ Manifest.permission.READ_SMS, }; @Override protectedvoidonCreate(BundlesavedInstanceState){ super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); MyPermission(); } //点击按钮在短信数据库插入数据 publicvoidinsertClick(Viewview){ Uriuri=Uri.parse("ocntent://sms"); ContentValuesvalues=newContentValues(); values.put("address","17865318803"); values.put("body","我是你的影子"); values.put("date",System.currentTimeMillis()); getContentResolver().insert(uri,values); } //动态获取权限 publicvoidMyPermission(){ if(ContextCompat.checkSelfPermission(this,Manifest.permission.READ_CONTACTS)!=PackageManager.PERMISSION_GRANTED){ //Android6.0申请权限 ActivityCompat.requestPermissions(this,PERMISSION,1); }else{ Toast.makeText(this,"成功",Toast.LENGTH_SHORT).show(); } } }
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