Reading a simple text file

Question

I am trying to read a simple text file in my sample Android Application  I am using the below written code for reading the simple text file   InputStream inputStream   openFileInput  test txt    InputStreamReader inputStreamReader   new InputStreamReader inputStream   BufferedReader bufferedReader   new BufferedReader inputStreamReader     My questions is   Where should I place this  test txt  file in my project   I have tried putting the file under  res raw  and  asset  folder but I get the exception  FileNotFound  when first live of the code written above gets executed   Thanks for the help

User · Answer

Here is a simple class that handles both raw and asset files :

public class ReadFromFile {

public static String raw(Context context, @RawRes int id) {
    InputStream is = context.getResources().openRawResource(id);
    int size = 0;
    try {
        size = is.available();
    } catch (IOException e) {
        e.printStackTrace();
        return "";
    }
    return readFile(size, is);
}

public static String asset(Context context, String fileName) {
    InputStream is = null;
    int size = 0;
    try {
        is = context.getAssets().open(fileName);
        AssetFileDescriptor fd = null;
        fd = context.getAssets().openFd(fileName);
        size = (int) fd.getLength();
        fd.close();
    } catch (IOException e) {
        e.printStackTrace();
        return "";
    }
    return readFile(size, is);
}


private static String readFile(int size, InputStream is) {
    try {
        byte buffer[] = new byte[size];
        is.read(buffer);
        is.close();
        return new String(buffer);
    } catch (Exception e) {
        e.printStackTrace();
        return "";
    }
}

}

For example :

ReadFromFile.raw(context, R.raw.textfile);

And for asset files :

ReadFromFile.asset(context, "file.txt");

User · Answer

This is how I do it       public static String readFromAssets Context context  String filename  throws IOException       BufferedReader reader   new BufferedReader new InputStreamReader context getAssets   open filename             do reading  usually loop until end of file reading       StringBuilder sb   new StringBuilder        String mLine   reader readLine        while  mLine    null            sb append mLine      process line         mLine   reader readLine              reader close        return sb toString        use it as follows    readFromAssets context  test txt

User · Answer

try this   package example txtRead   import java io BufferedReader  import java io ByteArrayOutputStream  import java io FileReader  import java io IOException  import java io InputStream  import java io InputStreamReader  import java util ArrayList  import java util List  import java util StringTokenizer  import java util Vector   import android app Activity  import android os Bundle  import android widget TextView   public class txtRead extends Activity       String labels  caption       String text         String   s      private Vector lt String gt  wordss      int j 0      private StringTokenizer tokenizer           Called when the activity is first created          Override     public void onCreate Bundle savedInstanceState            super onCreate savedInstanceState           setContentView R layout main           wordss   new Vector lt String gt             TextView helloTxt    TextView findViewById R id hellotxt           helloTxt setText readTxt             private String readTxt          InputStream inputStream   getResources   openRawResource R raw toc          InputStream inputStream   getResources   openRawResource R raw internals        System out println inputStream        ByteArrayOutputStream byteArrayOutputStream   new ByteArrayOutputStream          int i    try      i   inputStream read       while  i    -1                 byteArrayOutputStream write i          i   inputStream read                  inputStream close        catch  IOException e          TODO Auto-generated catch block    e printStackTrace              return byteArrayOutputStream toString

User · Answer

Having a file in your assets folder requires you to use this piece of code in order to get files from the assets folder   yourContext getAssets   open  test txt      In this example  getAssets   returns an AssetManager instance and then you re free to use whatever method you want from the AssetManager API

User · Answer

To read the file saved in assets folder  public static String readFromFile Context context  String file            try               InputStream is   context getAssets   open file               int size   is available                byte buffer     new byte size               is read buffer               is close                return new String buffer             catch  Exception e                e printStackTrace                return

User · Answer

Place your text file in the  assets directory under the Android project  Use AssetManager class to access it   AssetManager am   context getAssets    InputStream is   am open  test txt      Or you can also put the file in the  res raw directory  where the file will be indexed and is accessible by an id in the R file   InputStream is   context getResources   openRawResource R raw test

User · Answer

In Mono For Android      try       System IO Stream StrIn   this Assets Open  MyMessage txt        string Content   string Empty      using  System IO StreamReader StrRead   new System IO StreamReader StrIn               try                     Content   StrRead ReadToEnd                StrRead Close                    catch  Exception ex    csFunciones MostarMsg this  ex Message                       StrIn Close              StrIn   null    catch  Exception ex    csFunciones MostarMsg this  ex Message

[android] Reading a simple text file

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