I have created a txt file and saved it in the file Explorer at data/data/com.xxx/files/mynote/txt
when I entered a string into edit text and click the button.
I want compare txt file content and input String. In my txt file, only minimum length 5 to 6 is stored. How do I do this? I have tried but it can not compare properly - it goes to else block part when I entered the same string as i save in my txt file like "tazin".
Here is my code.
btnSubmitCode=(Button)findViewById(R.id.button_Submit);
btnSubmitCode.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
if(editText_Code.getText().toString().isEmpty())
{
Toast.makeText(getApplicationContext(),"Please Enter Code", Toast.LENGTH_SHORT).show();
}
else
{
String strCode = editText_Code.getText().toString().trim();
create_File(strCode);
readFile();
}
String temp;
String searchString = "tazin";
try {
File file=new File("/data/data/com.xxxxx/files/mynote.txt/");
BufferedReader in = new BufferedReader(new FileReader(file));
while (in.readLine() != null)
{
temp = in.readLine();
System.out.println("String from txt file ="+temp);
if(searchString.equals(temp))
{
System.out.println("word is match");
in.close();
return;
}
else
{
System.out.println("word is not match");
}
}
in.close();
}
catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
//Write File
private void create_File(String strtext)
{
FileOutputStream fos = null;
try
{
fos = openFileOutput("mynote.txt", MODE_PRIVATE);
fos.write(strtext.getBytes());
Toast.makeText(getApplicationContext(), "File created succesfully",
Toast.LENGTH_SHORT).show();
}
catch(FileNotFoundException fexception)
{
fexception.printStackTrace();
}
catch(IOException ioexception)
{
ioexception.printStackTrace();
}
finally
{
if (fos != null)
{
try
{
// drain the stream
fos.flush();
fos.close();
}
catch (IOException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
//Read File
private void readFile()
{
FileInputStream fis;
try
{
fis = openFileInput("mynote.txt");
byte[] reader = new byte[fis.available()];
while (fis.read(reader) != -1)
{
}
textView_ReadCode.setText(new String(reader));
strReadFile = new String(reader);
System.out.println("Read File Into String Format " + strReadFile);
Toast.makeText(getApplicationContext(), "File read succesfully",
Toast.LENGTH_SHORT).show();
if (fis != null)
{
fis.close();
}
}
catch (FileNotFoundException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
catch (IOException e)
{
Log.e("Read File", e.getLocalizedMessage());
}
}
You're misusing the BufferedReader.readLine() method. You're calling it twice each time through your while loop; once in the while conditional, and once in the loop block itself. So, when you do temp = in.readLine() and then the searchString.equals(temp) comparison, you've already skipped a line from the text file. Structure your loop like so:
temp = in.readLine();
while (temp != null)
{
System.out.println("String from txt file =" + temp);
if(searchString.equals(temp))
{
System.out.println("word is match");
in.close();
return;
}
else
{
System.out.println("word is not match");
}
temp = in.readLine();
}
Edit:
Per our chat in comments, here is the updated code for what you need:
btnSubmitCode.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View arg0)
{
String str = editText_Code.getText().toString();
if(str == null || str.equals(""))
{
Toast.makeText(getApplicationContext(), "Please Enter Code", Toast.LENGTH_SHORT).show();
}
else
{
String strCode = str.trim();
if(checkCode(strCode))
{
System.out.println("word is match");
}
else
{
System.out.println("word is not match");
}
}
}
}
);
...
...
// Returns true if the code has already been used
// Returns false if the code is new
// Creates mynote.txt if it doesn't exist
// Appends code if it is new
private boolean checkCode(String code)
{
String temp;
File file = new File(getFilesDir() + "mynote.txt");
if(file.exists())
{
try
{
BufferedReader in = new BufferedReader(new FileReader(file));
temp = in.readLine();
while (temp != null)
{
if(code.equals(temp))
{
// Match was found
// Clean up and return true
in.close();
return true;
}
temp = in.readLine();
}
in.close();
}
catch (FileNotFoundException e)
{
}
catch (IOException e)
{
}
}
// Match was not found or File doesn't exist
// Append code to mynote.txt and return false
try
{
BufferedWriter out = new BufferedWriter(new FileWriter(file, true));
out.newLine();
out.write(code);
out.close();
}
catch (IOException e)
{
}
return false;
}
在您的问题中,您编写了不同的路径,然后在代码中编写了代码,因此只需检查文件路径即可。
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