Notes

// 1 Edittex 2 buton yazıyı kaydedip okuyabiliosn
package com.example.kronos.hometech;

import android.content.Context;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

public class reg extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_reg);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);

final TextView tx = ( TextView ) findViewById(R.id.textView3);
Button btn = (Button) findViewById(R.id.button);
Button okuma = (Button) findViewById(R.id.button2);
final EditText oku = (EditText) findViewById(R.id.editText2);

btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
writeToFile(oku.getText().toString(),getApplicationContext());
}
});

okuma.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
tx.setText(readFromFile(getApplicationContext()));
}
});





}

private void writeToFile(String data,Context context) {
try {
OutputStreamWriter outputStreamWriter = new OutputStreamWriter(context.openFileOutput("config.txt", Context.MODE_PRIVATE));
outputStreamWriter.write(data);
outputStreamWriter.close();

}
catch (IOException e) {
Log.e("Exception", "File write failed: " + e.toString());
}
}


private String readFromFile(Context context) {

String ret = "";

try {
InputStream inputStream = context.openFileInput("config.txt");

if ( inputStream != null ) {
InputStreamReader inputStreamReader = new InputStreamReader(inputStream);
BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
String receiveString = "";
StringBuilder stringBuilder = new StringBuilder();

while ( (receiveString = bufferedReader.readLine()) != null ) {
stringBuilder.append(receiveString);
}

inputStream.close();
ret = stringBuilder.toString();
}
}
catch (FileNotFoundException e) {
Log.e("login activity", "File not found: " + e.toString());
} catch (IOException e) {
Log.e("login activity", "Can not read file: " + e.toString());
}

return ret;
}


}