Android簡訊備份及資料插入實現程式碼解析
阿新 • • 發佈:2020-11-18
實現備份簡訊到xml檔案和像簡訊中插入一條資料
一、實現簡訊將備份到xml檔案中
在佈局檔案中定義一個按鈕,定義點選事件為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 { //動態獲取許可權 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); //動態獲取許可權 MyPermission(); } //點選按鈕查詢簡訊資料庫內容,然後備份 public void copyClick(View view) { try { //獲取xml序列化例項 XmlSerializer serializer = Xml.newSerializer(); //設定序列化引數 File file = new File(Environment.getExternalStorageDirectory().getPath(),"smsBackUp.xml"); FileOutputStream fos = new FileOutputStream(file); serializer.setOutput(fos,"utf-8"); //開始寫xml文件的開頭 serializer.startDocument("utf-8",true); //開始寫根節點 serializer.startTag(null,"smss"); //簡訊資料庫內容也通過內容提供者暴露出來,所以我們只需要通過內容解析者去操作資料庫 Uri uri = Uri.parse("content://sms/"); Cursor cursor = getContentResolver().query(uri,new String[]{"address","date","body"},null,null); while (cursor.moveToNext()) { String address = cursor.getString(0); String date = cursor.getString(1); String body = cursor.getString(2); //寫sms節點 serializer.startTag(null,"sms"); //寫address節點 serializer.startTag(null,"address"); serializer.text(address); serializer.endTag(null,"address"); //寫body節點 serializer.startTag(null,"body"); serializer.text(body); serializer.endTag(null,"body"); //寫date節點 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("異常1"); } catch (IOException e) { e.printStackTrace(); System.out.println("異常2"); } } //動態獲取許可權 public void MyPermission() { if (ContextCompat.checkSelfPermission(this,Manifest.permission.READ_CONTACTS) != PackageManager.PERMISSION_GRANTED) { //Android 6.0申請許可權 ActivityCompat.requestPermissions(this,PERMISSION,1); } else { Toast.makeText(this,"成功",Toast.LENGTH_SHORT).show(); } } }
當然許可權是必要的
<uses-permission android:name="android.permission.READ_SMS"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
這樣就在SD卡根目錄備份了xml檔案
在真機6.0測試中遇到儲存address崩潰問題,除錯好久。先列印addredss,沒有問題;儲存死資料沒有問題,最後發現在輸出列印室有個address為null。檢視手機,是因為有個簡訊草稿,我想了兩個都能想到的的解決辦法:
1.刪除或傳送手機裡的草稿
2.在程式碼中進行判斷
if (address != null) { serializer.startTag(null,"address"); serializer.text(address); serializer.endTag(null,"address"); } else { serializer.text("這是草稿"); }
二、向簡訊的資料庫中插入資料(5.0及之後就不允許外部應用修改,直允許讀取,不做過多記錄)
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 { //動態獲取許可權 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(); } //點選按鈕在簡訊資料庫插入資料 public void insertClick(View view) { Uri uri = Uri.parse("ocntent://sms"); ContentValues values = new ContentValues(); values.put("address","17865318803"); values.put("body","我是你的影子"); values.put("date",System.currentTimeMillis()); getContentResolver().insert(uri,values); } //動態獲取許可權 public void MyPermission() { if (ContextCompat.checkSelfPermission(this,Toast.LENGTH_SHORT).show(); } } }
以上就是本文的全部內容,希望對大家的學習有所幫助,也希望大家多多支援我們。