Android SMS backup and data insertion implement code analysis

Implement backup of SMS to XML files and insert a piece of data like SMS

1. Implement SMS backup to xml file

Define a button in the layout file and define the click event as copyClick

：

package .heima76android_copysms;

import ;
import ;
import ;
import ;
import ;
import .;
import .;
import .;
import ;
import ;
import ;
import ;

import .;

import ;
import ;
import ;
import ;

public class MainActivity extends AppCompatActivity {
  //Dynamic access  static final String[] PERMISSION = new String[]{
      .READ_SMS,
      .WRITE_EXTERNAL_STORAGE,
  };

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    (savedInstanceState);
    setContentView(.activity_main);

    //Dynamic access    MyPermission();
  }

  //Click the button to query the SMS database content, and then back up  public void copyClick(View view) {

    try {
      //Get xml serialization instance      XmlSerializer serializer = ();
      //Set serialization parameters      File file = new File(().getPath(), "");
      FileOutputStream fos = new FileOutputStream(file);
      (fos, "utf-8");
      //Start the beginning of the xml document      ("utf-8", true);
      //Start write the root node      (null, "smss");

      //The content of the SMS database is also exposed through the content provider, so we only need to operate the database through the content parser      Uri uri = ("content://sms/");
      Cursor cursor = getContentResolver().query(uri, new String[]{"address", "date", "body"}, null, null, null);
      while (()) {
        String address = (0);
        String date = (1);
        String body = (2);

        //Write sms node        (null, "sms");

        //Write address node        (null, "address");
        (address);
        (null, "address");

        //Write body node        (null, "body");
        (body);
        (null, "body");

        //Write date node        (null, "date");
        (date);
        (null, "date");

        (null, "sms");

      }

      (null, "smss");
      ();


    } catch (FileNotFoundException e) {
      ();
      ("Exception 1");
    } catch (IOException e) {
      ();
      ("Exception 2");
    }


  }

  //Dynamic access  public void MyPermission() {
    if ((this, .READ_CONTACTS) != PackageManager.PERMISSION_GRANTED) {
      //Android 6.0 application permission      (this, PERMISSION, 1);
    } else {
      (this, "success", Toast.LENGTH_SHORT).show();
    }
  }

}

Of course permissions are necessary

<uses-permission android:name=".READ_SMS"/>
<uses-permission android:name=".WRITE_EXTERNAL_STORAGE"/>

This way, the xml file is backed up in the root directory of the SD card

I encountered a storage address crash problem in real machine 6.0 test, and I debugged it for a long time. Print addredss first, there is no problem; there is no problem storing dead data, and finally I found that there is an address null in the output printing room. I checked my phone because there was a draft text message. I thought of two solutions that I could think of:

1. Delete or send drafts from your phone

2. Make judgments in the code

if (address != null) {

          (null, "address");
          (address);
          (null, "address");
        } else {
          ("This is a draft");
        }

2. Insert data into the SMS database (5.0 and after, external applications will not be modified, and read will be allowed directly without too many records)

import ;
import ;
import ;
import ;
import .;
import .;
import .;
import ;
import ;
import ;

public class MainActivity extends AppCompatActivity {
  //Dynamic access  static final String[] PERMISSION = new String[]{
      .READ_SMS,
  };

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    (savedInstanceState);
    setContentView(.activity_main);
    MyPermission();
  }

  //Click the button to insert data in the SMS database  public void insertClick(View view) {
    Uri uri = ("ocntent://sms");
    ContentValues values = new ContentValues();
    ("address", "17865318803");
    ("body", "I am your shadow");
    ("date", ());
    getContentResolver().insert(uri, values);
  }

  //Dynamic access  public void MyPermission() {
    if ((this, .READ_CONTACTS) != PackageManager.PERMISSION_GRANTED) {
      //Android 6.0 application permission      (this, PERMISSION, 1);
    } else {
      (this, "success", Toast.LENGTH_SHORT).show();
    }
  }
}

The above is all the content of this article. I hope it will be helpful to everyone's study and I hope everyone will support me more.