Code Analysis of Android Short Message Backup and Data Insertion
- 2021-12-11 08:44:23
- OfStack
Realize backing up SMS to xml file and inserting 1 piece of data like SMS
1. SMS will be backed up to xml file
Define 1 button in the layout file, and define the click event as copyClick
MainActivity. java:
package com.lgqrlchinese.heima76android_copysms;
import android.Manifest;
import android.content.pm.PackageManager;
import android.database.Cursor;
import android.net.Uri;
import android.os.Environment;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Xml;
import android.view.View;
import android.widget.Toast;
import org.xmlpull.v1.XmlSerializer;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
public class MainActivity extends AppCompatActivity {
// Dynamic access to permissions
static final String[] PERMISSION = new String[]{
Manifest.permission.READ_SMS,
Manifest.permission.WRITE_EXTERNAL_STORAGE,
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Dynamic access to permissions
MyPermission();
}
// Click the button to query the contents of the SMS database, and then back up
public void copyClick(View view) {
try {
// Get xml Serialized instance
XmlSerializer serializer = Xml.newSerializer();
// Setting serialization parameters
File file = new File(Environment.getExternalStorageDirectory().getPath(), "smsBackUp.xml");
FileOutputStream fos = new FileOutputStream(file);
serializer.setOutput(fos, "utf-8");
// Start writing xml The beginning of a document
serializer.startDocument("utf-8", true);
// Start writing the root node
serializer.startTag(null, "smss");
// The content of the SMS database is also exposed by the content provider, so we only need to operate the database through the content parser
Uri uri = Uri.parse("content://sms/");
Cursor cursor = getContentResolver().query(uri, new String[]{"address", "date", "body"}, null, null, null);
while (cursor.moveToNext()) {
String address = cursor.getString(0);
String date = cursor.getString(1);
String body = cursor.getString(2);
// Write sms Node
serializer.startTag(null, "sms");
// Write address Node
serializer.startTag(null, "address");
serializer.text(address);
serializer.endTag(null, "address");
// Write body Node
serializer.startTag(null, "body");
serializer.text(body);
serializer.endTag(null, "body");
// Write date Node
serializer.startTag(null, "date");
serializer.text(date);
serializer.endTag(null, "date");
serializer.endTag(null, "sms");
}
serializer.endTag(null, "smss");
serializer.endDocument();
} catch (FileNotFoundException e) {
e.printStackTrace();
System.out.println(" Anomaly 1");
} catch (IOException e) {
e.printStackTrace();
System.out.println(" Anomaly 2");
}
}
// Dynamic access to permissions
public void MyPermission() {
if (ContextCompat.checkSelfPermission(this, Manifest.permission.READ_CONTACTS) != PackageManager.PERMISSION_GRANTED) {
//Android 6.0 Apply for authority
ActivityCompat.requestPermissions(this, PERMISSION, 1);
} else {
Toast.makeText(this, " Success ", Toast.LENGTH_SHORT).show();
}
}
}
Of course, permission is necessary
< uses-permission android:name="android.permission.READ_SMS"/ >
< uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/ >
This backs up the xml file in the root directory of the SD card
In the real machine 6.0 test, I encountered the crash of storage address, and debugged it for a long time. Print addredss first, no problem; There is no problem in storing dead data. Finally, it is found that there is an address for null in the output printing room. I checked my mobile phone because there was a draft text message, and I thought of two solutions that I could think of:
1. Delete or send drafts from your phone
2. Judge in code
if (address != null) {
serializer.startTag(null, "address");
serializer.text(address);
serializer.endTag(null, "address");
} else {
serializer.text(" This is a draft ");
}
2. Insert data into the database of short messages (no external application modification is allowed after 5.0, and reading is allowed directly without making too many records)
import android.Manifest;
import android.content.ContentValues;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
// Dynamic access to permissions
static final String[] PERMISSION = new String[]{
Manifest.permission.READ_SMS,
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
MyPermission();
}
// Click the button to insert data in the SMS database
public void insertClick(View view) {
Uri uri = Uri.parse("ocntent://sms");
ContentValues values = new ContentValues();
values.put("address", "17865318803");
values.put("body", " I am your shadow ");
values.put("date", System.currentTimeMillis());
getContentResolver().insert(uri, values);
}
// Dynamic access to permissions
public void MyPermission() {
if (ContextCompat.checkSelfPermission(this, Manifest.permission.READ_CONTACTS) != PackageManager.PERMISSION_GRANTED) {
//Android 6.0 Apply for authority
ActivityCompat.requestPermissions(this, PERMISSION, 1);
} else {
Toast.makeText(this, " Success ", Toast.LENGTH_SHORT).show();
}
}
}