Android 如何通过编程将短信数据库从根手机复制到sd卡

我有一部手机。 我想复制数据/data/com.android.providers.telephony/databases/mmssms.db 以编程方式将文件保存到sd卡

            File sd = Environment.getExternalStorageDirectory();
            String path = Environment.getDataDirectory().getAbsolutePath();
            File data = Environment.getDataDirectory();
            String currentDBPath = "/data/com.android.providers.telephony/databases/mmssms.db";
            String backupDBPath = "/bkup/mmssms.db";
            File currentDB = new File(data, currentDBPath);
            File backupDB = new File(sd, backupDBPath);
            // Local database
            InputStream input = new FileInputStream(currentDB);

            // Path to the external backup
            OutputStream output = new FileOutputStream(backupDB);

            // transfer bytes from the Input File to the Output File
            byte[] buffer = new byte[1024];
            int length;
            while ((length = input.read(buffer))>0) {
                output.write(buffer, 0, length);
            }

            output.flush();
            output.close();
            input.close();
    } catch (Exception e) {
        // TODO: handle exception
        Toast.makeText(this, e.getMessage().toString(), Toast.LENGTH_LONG).show();
    }`

我犯了这样的错误 java.io.FileNotFoundException:/data/data/com.android.providers.telephony/databases/mmssms.db（权限被拒绝）

            File sd = Environment.getExternalStorageDirectory();
            String path = Environment.getDataDirectory().getAbsolutePath();
            File data = Environment.getDataDirectory();
            String currentDBPath = "/data/com.android.providers.telephony/databases/mmssms.db";
            String backupDBPath = "/bkup/mmssms.db";
            File currentDB = new File(data, currentDBPath);
            File backupDB = new File(sd, backupDBPath);
            // Local database
            InputStream input = new FileInputStream(currentDB);

            // Path to the external backup
            OutputStream output = new FileOutputStream(backupDB);

            // transfer bytes from the Input File to the Output File
            byte[] buffer = new byte[1024];
            int length;
            while ((length = input.read(buffer))>0) {
                output.write(buffer, 0, length);
            }

            output.flush();
            output.close();
            input.close();
    } catch (Exception e) {
        // TODO: handle exception
        Toast.makeText(this, e.getMessage().toString(), Toast.LENGTH_LONG).show();
    }`

请帮帮我

            File sd = Environment.getExternalStorageDirectory();
            String path = Environment.getDataDirectory().getAbsolutePath();
            File data = Environment.getDataDirectory();
            String currentDBPath = "/data/com.android.providers.telephony/databases/mmssms.db";
            String backupDBPath = "/bkup/mmssms.db";
            File currentDB = new File(data, currentDBPath);
            File backupDB = new File(sd, backupDBPath);
            // Local database
            InputStream input = new FileInputStream(currentDB);

            // Path to the external backup
            OutputStream output = new FileOutputStream(backupDB);

            // transfer bytes from the Input File to the Output File
            byte[] buffer = new byte[1024];
            int length;
            while ((length = input.read(buffer))>0) {
                output.write(buffer, 0, length);
            }

            output.flush();
            output.close();
            input.close();
    } catch (Exception e) {
        // TODO: handle exception
        Toast.makeText(this, e.getMessage().toString(), Toast.LENGTH_LONG).show();
    }`

提前谢谢你

            File sd = Environment.getExternalStorageDirectory();
            String path = Environment.getDataDirectory().getAbsolutePath();
            File data = Environment.getDataDirectory();
            String currentDBPath = "/data/com.android.providers.telephony/databases/mmssms.db";
            String backupDBPath = "/bkup/mmssms.db";
            File currentDB = new File(data, currentDBPath);
            File backupDB = new File(sd, backupDBPath);
            // Local database
            InputStream input = new FileInputStream(currentDB);

            // Path to the external backup
            OutputStream output = new FileOutputStream(backupDB);

            // transfer bytes from the Input File to the Output File
            byte[] buffer = new byte[1024];
            int length;
            while ((length = input.read(buffer))>0) {
                output.write(buffer, 0, length);
            }

            output.flush();
            output.close();
            input.close();
    } catch (Exception e) {
        // TODO: handle exception
        Toast.makeText(this, e.getMessage().toString(), Toast.LENGTH_LONG).show();
    }`

我使用下面的代码复制sd卡中的数据库 ' 试试{

            File sd = Environment.getExternalStorageDirectory();
            String path = Environment.getDataDirectory().getAbsolutePath();
            File data = Environment.getDataDirectory();
            String currentDBPath = "/data/com.android.providers.telephony/databases/mmssms.db";
            String backupDBPath = "/bkup/mmssms.db";
            File currentDB = new File(data, currentDBPath);
            File backupDB = new File(sd, backupDBPath);
            // Local database
            InputStream input = new FileInputStream(currentDB);

            // Path to the external backup
            OutputStream output = new FileOutputStream(backupDB);

            // transfer bytes from the Input File to the Output File
            byte[] buffer = new byte[1024];
            int length;
            while ((length = input.read(buffer))>0) {
                output.write(buffer, 0, length);
            }

            output.flush();
            output.close();
            input.close();
    } catch (Exception e) {
        // TODO: handle exception
        Toast.makeText(this, e.getMessage().toString(), Toast.LENGTH_LONG).show();
    }`

---

您正在尝试从其他应用程序复制数据库。这是不允许的。即使您的手机是根用户，您的应用程序也尚未被授予根用户权限

            File sd = Environment.getExternalStorageDirectory();
            String path = Environment.getDataDirectory().getAbsolutePath();
            File data = Environment.getDataDirectory();
            String currentDBPath = "/data/com.android.providers.telephony/databases/mmssms.db";
            String backupDBPath = "/bkup/mmssms.db";
            File currentDB = new File(data, currentDBPath);
            File backupDB = new File(sd, backupDBPath);
            // Local database
            InputStream input = new FileInputStream(currentDB);

            // Path to the external backup
            OutputStream output = new FileOutputStream(backupDB);

            // transfer bytes from the Input File to the Output File
            byte[] buffer = new byte[1024];
            int length;
            while ((length = input.read(buffer))>0) {
                output.write(buffer, 0, length);
            }

            output.flush();
            output.close();
            input.close();
    } catch (Exception e) {
        // TODO: handle exception
        Toast.makeText(this, e.getMessage().toString(), Toast.LENGTH_LONG).show();
    }`

String currentDBPath = "/data/com.android.providers.telephony/databases/mmssms.db";

您需要先授予root权限，然后使用shell命令复制文件，如（cp/data/…/xxx.db/sdcard/xxx.db）

            File sd = Environment.getExternalStorageDirectory();
            String path = Environment.getDataDirectory().getAbsolutePath();
            File data = Environment.getDataDirectory();
            String currentDBPath = "/data/com.android.providers.telephony/databases/mmssms.db";
            String backupDBPath = "/bkup/mmssms.db";
            File currentDB = new File(data, currentDBPath);
            File backupDB = new File(sd, backupDBPath);
            // Local database
            InputStream input = new FileInputStream(currentDB);

            // Path to the external backup
            OutputStream output = new FileOutputStream(backupDB);

            // transfer bytes from the Input File to the Output File
            byte[] buffer = new byte[1024];
            int length;
            while ((length = input.read(buffer))>0) {
                output.write(buffer, 0, length);
            }

            output.flush();
            output.close();
            input.close();
    } catch (Exception e) {
        // TODO: handle exception
        Toast.makeText(this, e.getMessage().toString(), Toast.LENGTH_LONG).show();
    }`

            File sd = Environment.getExternalStorageDirectory();
            String path = Environment.getDataDirectory().getAbsolutePath();
            File data = Environment.getDataDirectory();
            String currentDBPath = "/data/com.android.providers.telephony/databases/mmssms.db";
            String backupDBPath = "/bkup/mmssms.db";
            File currentDB = new File(data, currentDBPath);
            File backupDB = new File(sd, backupDBPath);
            // Local database
            InputStream input = new FileInputStream(currentDB);

            // Path to the external backup
            OutputStream output = new FileOutputStream(backupDB);

            // transfer bytes from the Input File to the Output File
            byte[] buffer = new byte[1024];
            int length;
            while ((length = input.read(buffer))>0) {
                output.write(buffer, 0, length);
            }

            output.flush();
            output.close();
            input.close();
    } catch (Exception e) {
        // TODO: handle exception
        Toast.makeText(this, e.getMessage().toString(), Toast.LENGTH_LONG).show();
    }`

只需使用本文中的方法并将shell命令更改为

            File sd = Environment.getExternalStorageDirectory();
            String path = Environment.getDataDirectory().getAbsolutePath();
            File data = Environment.getDataDirectory();
            String currentDBPath = "/data/com.android.providers.telephony/databases/mmssms.db";
            String backupDBPath = "/bkup/mmssms.db";
            File currentDB = new File(data, currentDBPath);
            File backupDB = new File(sd, backupDBPath);
            // Local database
            InputStream input = new FileInputStream(currentDB);

            // Path to the external backup
            OutputStream output = new FileOutputStream(backupDB);

            // transfer bytes from the Input File to the Output File
            byte[] buffer = new byte[1024];
            int length;
            while ((length = input.read(buffer))>0) {
                output.write(buffer, 0, length);
            }

            output.flush();
            output.close();
            input.close();
    } catch (Exception e) {
        // TODO: handle exception
        Toast.makeText(this, e.getMessage().toString(), Toast.LENGTH_LONG).show();
    }`

stdin.writeBytes("cp /data/data/com.android.providers.telephony/databases/mmssms.db /sdcard/\n"); // \n executes the command

---

谢谢你的快速回复。我是这一部分的新手，所以我可以通过编程来完成吗？我提到的路径是我手机中短信数据库的实际路径。我自己做的：D，方法如上所述。是的！！！！！谢谢老兄…你是gr8。我让它工作了…谢谢你的帮助…朋友们好，我正在将相同的数据库恢复到/data/data/com.android.providers.telephony/databases/mmssms.db文件夹。还原已成功完成，但如果我打开消息传递应用程序，则会显示错误，如应用程序消息传递过程。com.android.mms已意外停止并强制关闭，请帮助我