// u activity
EditText textBox;
static final int READ_BLOCK_SIZE = 100;

// u onCreate
textBox = (EditText) findViewById(R.id.txtText1);

// u activitiy nakon onCreate
public void onClickSave(View view) {
		String str = textBox.getText().toString();
		try
		{
            	
			FileOutputStream fOut =
					openFileOutput("textfile.txt",
							MODE_PRIVATE);
			
                        
			OutputStreamWriter osw = new
					OutputStreamWriter(fOut);

			//---write the string to the file---
			osw.write(str);
			osw.flush(); 
			osw.close();

			//---display file saved message---
			Toast.makeText(getBaseContext(),
					"File saved successfully!",
					Toast.LENGTH_SHORT).show();

			//---clears the EditText---
			textBox.setText("");
		}
		catch (IOException ioe)
		{
			ioe.printStackTrace();
		}
	}

	public void onClickLoad(View view) {
		try
		{
			
			FileInputStream fIn = 
					openFileInput("textfile.txt");
			InputStreamReader isr = new 
					InputStreamReader(fIn);
            
            
			char[] inputBuffer = new char[READ_BLOCK_SIZE];
			String s = "";

			int charRead;
			while ((charRead = isr.read(inputBuffer))>0)
			{
				//---convert the chars to a String---
				String readString =
						String.copyValueOf(inputBuffer, 0,
								charRead);
				s += readString;

				inputBuffer = new char[READ_BLOCK_SIZE];
			}
			//---set the EditText to the text that has been 
			// read---
			textBox.setText(s);

			Toast.makeText(getBaseContext(),
					"File loaded successfully!",
					Toast.LENGTH_SHORT).show();
		}
		catch (IOException ioe) {
			ioe.printStackTrace();
		}

	}