创建内部db文件android sqlite

Question

我正在尝试在数据提交到数据库时创建内部数据库文件。当用户输入文本字段的值并单击按钮时，'SAMPLE.db'数据库文件应该在内部存储上的'MYTEST'文件内创建。这是我的代码。但它没有用。

- 主要活动oncreate -

btn.setOnClickListener(new OnClickListener() {
                public void onClick(View v) {
                    String Id=mEDitTxt.getText().toString();
                    String Unm=mEDitTxt2.getText().toString();


                    insertconfig(Id, Unm);
                    DbBackup.copyDatabase(getApplicationContext());

                }
            });

-DBbackup -

public class DbBackup {

    public static void copyDatabase(Context c) {

        String DATABASE_NAME = "SAMPLE.db";

        String databasePath = c.getDatabasePath(DATABASE_NAME).getPath();
        File f = new File(databasePath);
        OutputStream myOutput = null;
        OutputStream myOutputInternal = null;
        InputStream myInput = null;
        Log.d("testing", " lots db path " + databasePath);
        Log.d("testing", " lots db exist " + f.exists());

        if (f.exists()) {
            try {


                File directoryIntenal = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/MYTEST/");



                if (!directoryIntenal.exists())
                    directoryIntenal.mkdir();

                myOutputInternal = new FileOutputStream(directoryIntenal.getAbsolutePath()
                        + "/" + DATABASE_NAME);

                myInput = new FileInputStream(databasePath);


                byte[] buffer = new byte[1024];
                int length;
                while ((length = myInput.read(buffer)) > 0) {

                    myOutputInternal.write(buffer, 0, length);
                }


                myOutputInternal.flush();

            } catch (Exception e) {
            } finally {
                try {

                    if (myOutputInternal != null) {
                        myOutputInternal.close();
                        myOutputInternal = null;
                    }
                    if (myInput != null) {
                        myInput.close();
                        myInput = null;
                    }
                } catch (Exception e) {
                }
            }
        }
    }
}