package com.example.viraj.app_honey_do_list_sharedpreference; import android.content.Context; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.EditText; 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 MainActivity extends AppCompatActivity { private Button button; private EditText editText_message; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); editText_message = (EditText) findViewById(R.id.id_entertext); button = (Button) findViewById(R.id.id_button); button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { //logic goes here if (!editText_message.getText().toString().equals("")) { String message = editText_message.getText().toString(); writetofile(message); } else { //do nothing for now } } }); try { //----------------------------- if (readfromfile() != null) { editText_message.setText(readfromfile()); }//---------------------------- } catch (IOException e) { e.printStackTrace(); } } //------------------------ private void writetofile(String message) { try { //-------------------------itna hi likha he OutputStreamWriter outputStreamWriter = new OutputStreamWriter(openFileOutput("todolist.txt", Context.MODE_PRIVATE)); outputStreamWriter.write(message); outputStreamWriter.close();//alwas close your stream //----------------------------- } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } private String readfromfile() throws IOException { String result = ""; InputStream inputStream = openFileInput("todolist.txt"); if (inputStream != null) { InputStreamReader inputStreamReader = new InputStreamReader(inputStream); //we need buffer behav like a bucket BufferedReader bufferedReader = new BufferedReader(inputStreamReader); //empty string to to do things String tempstring = ""; StringBuilder stringBuilder = new StringBuilder(); //temp string me read hone jaayega while ((tempstring = bufferedReader.readLine()) != null) { stringBuilder.append(tempstring); } inputStream.close(); result = stringBuilder.toString(); } return result; } }
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.viraj.app_honey_do_list_sharedpreference.MainActivity">
<EditText
android:id="@+id/id_entertext"
android:layout_width="276dp"
android:layout_height="282dp"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:ems="10"
android:hint="ENTER YOUT LIST"
android:inputType="textMultiLine"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.084" />
<Button
android:id="@+id/id_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button"
tools:layout_editor_absoluteX="148dp"
tools:layout_editor_absoluteY="406dp" />
</android.support.constraint.ConstraintLayout>
