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Android to write text tile to internal storage

Posted on November 24, 2021November 24, 2021 By christo No Comments on Android to write text tile to internal storage

Full source code to use a FileOutputStream to save the data in bytes. Then we use a FileInputStream and a BufferedReader to read them back into our app and rebuild our string using a StringBuilder

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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="tech.codingpoint.internalstorageexample.MainActivity">

    <EditText
        android:id="@+id/edit_text"
        android:layout_width="match_parent"
        android:layout_height="200dp" />

    <Button
        android:id="@+id/button_save"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/edit_text"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="16dp"
        android:text="save"
        android:onClick="save"/>

    <Button
        android:id="@+id/button_load"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignStart="@+id/button_save"
        android:layout_below="@+id/button_save"
        android:layout_marginTop="17dp"
        android:text="load"
        android:onClick="load"/>
</RelativeLayout>

MainActivity.java

package tech.codingpoint.internalstorageexample;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;

public class MainActivity extends AppCompatActivity {
    private static final String FILE_NAME = "example.txt";

    EditText mEditText;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mEditText = findViewById(R.id.edit_text);
    }

    public void save(View v) {
        String text = mEditText.getText().toString();
        FileOutputStream fos = null;

        try {
            fos = openFileOutput(FILE_NAME, MODE_PRIVATE);
            fos.write(text.getBytes());

            mEditText.getText().clear();
            Toast.makeText(this, "Saved to " + getFilesDir() + "/" + FILE_NAME,
                    Toast.LENGTH_LONG).show();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (fos != null) {
                try {
                    fos.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }

    public void load(View v) {
        FileInputStream fis = null;

        try {
            fis = openFileInput(FILE_NAME);
            InputStreamReader isr = new InputStreamReader(fis);
            BufferedReader br = new BufferedReader(isr);
            StringBuilder sb = new StringBuilder();
            String text;

            while ((text = br.readLine()) != null) {
                sb.append(text).append("\n");
            }

            mEditText.setText(sb.toString());

        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (fis != null) {
                try {
                    fis.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}
android Tags:Android, internal storage in android

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