Saving TextFile to SDCARD in android?

Saving TextFile to SDCARD in android?

Hello android lovers,

In today’s tutorial I will show you how to

1. Create a text file and save a textfile in your SDCARD in your preferred path.

2. Read the contents from the same file and show it in a TextView.

For writing a file we use the FileWriter class and for reading the textfile we use the FileReader class.
Now Let’s check out how we do this .

First create a fresh project and name it “saveFileDemo”.
In the “saveFileDemo.java” file copy this contents.

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package com.coderzheaven.pack;   import java.io.FileReader; import java.io.FileWriter;   import android.app.Activity; import android.os.Bundle; import android.widget.TextView;   public class saveFileDemo extends Activity {     @Override     public void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.main);         createFile();         String file_contents = readFile();         System.out.println("FILE CONTENTS :  "  + file_contents);           TextView tv = (TextView)findViewById(R.id.tv);         tv.setText("Read File contents from SDCARD : \n" + file_contents);     }     public void createFile(){         FileWriter fWriter;         try{              fWriter = new FileWriter("/sdcard/myfile.txt");              fWriter.write("My file contents");              fWriter.flush();              fWriter.close();          }catch(Exception e){                   e.printStackTrace();          }     }     public String readFile(){         char buf[] = new char[512];         FileReader rdr;         String contents = "";         try {             rdr = new FileReader("/sdcard/myfile.txt");             int s = rdr.read(buf);             for(int k = 0; k < s; k++){                 contents+=buf[k];             }         } catch (Exception e) {             e.printStackTrace();         }         return contents;     } }

This is the main.xml file contents.

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<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"     android:orientation="vertical"     android:layout_width="fill_parent"     android:layout_height="fill_parent"     > <TextView     android:id = "@+id/tv"     android:layout_width="fill_parent"     android:layout_height="wrap_content"     android:text="@string/hello"     /> </LinearLayout>

Here is the Strings.xml file contents

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<?xml version="1.0" encoding="utf-8"?> <resources>     <string name="hello">Hello World, saveFileDemo!</string>     <string name="app_name">saveFileDemo from Coderzheaven</string> </resources>

Now the AndroidManifest.xml file contents.

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<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android"       package="com.coderzheaven.pack"       android:versionCode="1"       android:versionName="1.0">     <application android:icon="@drawable/icon" android:label="@string/app_name">         <activity android:name=".saveFileDemo"                   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>

You can actually see the file by going to the FileExplorer and expanding the mnt folder(or simply SDCARD in older versions) and the SDCARD folder.
See the screenshot.