How to save data in sdcard(File External storage) programmatically in android

In this  article we are learning about save data to file in sdcard.we can save any kind of data or images in sdcard by using below concepts

* FileOutputStream
* OutputStreamWriter



First we have to give permission for accessing SDCARD for that

1) AndroidManifest.xml

add the below permission in your AndroidManifest.xml file

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.forblog"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="21" />
      <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>


</manifest>

2)  MainActivity.java

add the below code in java file
import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.Date;

import android.app.Activity;
import android.content.Context;
import android.content.ContextWrapper;
import android.location.Location;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.view.Window;
import android.widget.TextView;

public class MainActivity extends Activity {

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

  try {
            String scaneddata="save data to file in sdcard";
             String dir = Environment.getExternalStorageDirectory()+File.separator+"sample";
             File folder = new File(dir); 
             folder.mkdirs();
             File folderpath = new File(folder+File.separator+"sample.txt"); 
            folderpath.createNewFile();
             FileOutputStream fOut = new FileOutputStream(folderpath);
             OutputStreamWriter myOutWriter = new OutputStreamWriter(fOut);
             myOutWriter.append(scaneddata);
             myOutWriter.close();
             fOut.close();
             }catch(IOException e)
             {
             e.printStackTrace();
             }
}
}

3)Demo

Finally,Run your application

OUTPUT:

sample.txt file with data will be created in sample folder in sdcard of device
see the created sample.txt file in path:  sdcard/sample/sample.txt

see the saved data in sample.txt file