how to view all the names that exists in the file using an scroll or trying the name in emulator

[deepika deepi]

hi,
i want to get the whole output that exists in the file from an external memory. but i am able to view only few files from first till the emolator is displayed. how can i make it view all the file that exists in the file using an scroll and search option for that external storage?

Afghanistan Africa Albania Algeria American Samoa Andorra Angola Anguilla Antarctica Antigua & Barbuda Antilles, Netherlands Arabia, Saudi Argentina Armenia Aruba Asia Australia Austria Azerbaijan Bahamas, Bahrain Bangladesh Barbados Belarus Belgium Belize Benin Bermuda Bhutan Bolivia Bosnia and Herzegovina Botswana Bouvet Island Brazil British Indian Ocean T. British Virgin Islands Brunei Darussalam Bulgaria Burkina Faso Burundi Cambodia Cameroon Canada Cape Verde Caribbean, the Cayman Islands Central African Republic Central America Chad Chile China Christmas Island Cocos (Keeling) Islands Colombia Comoros Congo Congo, Dem. Rep. of the Cook Islands Costa Rica Cote D'Ivoire Croatia Cuba Cyprus Czech Republic Denmark Djibouti Dominica Dominican Republic East Timor (Timor-Leste) Ecuador Egypt El Salvador Equatorial Guinea Eritrea Estonia Ethiopia Europe European Union Falkland Islands (Malvinas) Faroe Islands Fiji Finland France French Guiana French Polynesia French Southern Terr. Gabon Gambia, the Georgia Germany Ghana Gibraltar Greece Greenland Grenada Guadeloupe Guam Guatemala Guernsey and Alderney Guiana, French Guinea Guinea-Bissau Guinea, Equatorial Guyana Haiti Holy See (Vatican) Honduras Hong Kong, (China) Hungary Iceland India Indonesia Ireland Italy Ivory Coast (Cote d'Ivoire) Japan Jersey Jordan Kazakhstan Kenya Kiribati Kosovo Kuwait Kyrgyzstan Latvia Lebanon Lesotho Liberia Libyan Arab Jamahiriya Liechtenstein Lithuania Luxembourg Macao, (China) Macedonia, TFYR Madagascar Malawi Malaysia Maldives Mali Malta Marshall Islands Martinique (FR) Mauritania Mauritius Mayotte (FR) Mexico Middle East Monaco Mongolia Montenegro Montserrat Morocco Mozambique Myanmar (ex-Burma) Namibia Nauru Nepal Netherlands Netherlands Antilles New Caledonia New Zealand Nicaragua Niger Nigeria Niue Norfolk Island North America Norway Oceania Oman Pakistan Palestinian Territory Panama Papua New Guinea Peru Philippines Pitcairn Island Poland Portugal Puerto Rico Romania Russia (Russian Fed.) Rwanda Sahara, Western Saint Barthelemy (FR) Saint Helena (UK) Saint Kitts and Nevis Saint Lucia Saint Martin (FR) S Pierre & Miquelon(FR) S Vincent & Grenadines Samoa San Marino Sao Tome and Principe Saudi Arabia Senegal Serbia Seychelles Sierra Leone Singapore Slovakia Slovenia Solomon Islands Somalia South Africa South America Spain Sri Lanka (ex-Ceilan) Sudan Suriname Svalbard & Jan Mayen Is. Swaziland Sweden Switzerland Syrian Arab Republic Taiwan Tajikistan Thailand Togo Tokelau Tonga Trinidad & Tobago Tunisia Turkey Turkmenistan Turks and Caicos Is. Tuvalu Uganda Ukraine United Arab Emirates United Kingdom United States Uzbekistan Vatican (Holy See) Venezuela Viet Nam Virgin Islands, British Virgin Islands, U.S. Wallis and Futuna Western Sahara Yemen Zambia Zimbabwe

android code is

[code = android]

package com.lightcone.writesdcard;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import android.app.Activity;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.widget.TextView;

public class WriteSDCard extends Activity {

private static final String TAG = "MEDIA";
private TextView tv;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
tv = (TextView) findViewById(R.id.TextView01);
checkExternalMedia();
writeToSDFile();
readRaw();
}

/** Method to check whether external media available and writable. This is adapted from
http://developer.android.com/guide/topics/data/data-storage.html#filesExternal */

private void checkExternalMedia(){
boolean mExternalStorageAvailable = false;
boolean mExternalStorageWriteable = false;
String state = Environment.getExternalStorageState();

if (Environment.MEDIA_MOUNTED.equals(state)) {
// Can read and write the media
mExternalStorageAvailable = mExternalStorageWriteable = true;
} else if (Environment.MEDIA_MOUNTED_READ_ONLY.equals(state)) {
// Can only read the media
mExternalStorageAvailable = true;
mExternalStorageWriteable = false;
} else {
// Can't read or write
mExternalStorageAvailable = mExternalStorageWriteable = false;
}
tv.append("\n\nExternal Media: readable="
+mExternalStorageAvailable+" writable="+mExternalStorageWriteable);
}

/** Method to write ascii text characters to file on SD card. Note that you must add a
WRITE_EXTERNAL_STORAGE permission to the manifest file or this method will throw
a FileNotFound Exception because you won't have write permission. */

private void writeToSDFile(){

// Find the root of the external storage.
// See http://developer.android.com/guide/topics/data/data-storage.html#filesExternal

File root = android.os.Environment.getExternalStorageDirectory();
tv.append("\nExternal file system root: "+root);

// See http://stackoverflow.com/questions/3551821/android-write-to-sd-card-folder

File dir = new File (root.getAbsolutePath() + "/download");
dir.mkdirs();
File file = new File(dir, "myData.txt");

try {
FileOutputStream f = new FileOutputStream(file);
PrintWriter pw = new PrintWriter(f);
pw.println("Howdy do to you.");
pw.println("Here is a second line.");
pw.flush();
pw.close();
f.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
Log.i(TAG, "******* File not found. Did you" +
" add a WRITE_EXTERNAL_STORAGE permission to the manifest?");
} catch (IOException e) {
e.printStackTrace();
}
tv.append("\n\nFile written to "+file);
}

/** Method to read in a text file placed in the res/raw directory of the application. The
method reads in all lines of the file sequentially. */

private void readRaw(){
tv.append("\nData read from res/raw/textfile.txt:");
InputStream is = this.getResources().openRawResource(R.raw.textfile);
InputStreamReader isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader(isr, 8192); // 2nd arg is buffer size

// More efficient (less readable) implementation of above is the composite expression
/*BufferedReader br = new BufferedReader(new InputStreamReader(
this.getResources().openRawResource(R.raw.textfile)), 8192);*/

try {
String test;
while (true){
test = br.readLine();
// readLine() returns null if no more lines in the file
if(test == null) break;
tv.append("\n"+" "+test);
}
isr.close();
is.close();
br.close();
} catch (IOException e) {
e.printStackTrace();
}
tv.append("\n\nThat is all");
}
}

[/code]

. how to make this option available for this code ?

[Swastik Dey]

It would be better to use a ListView in this case. You don't have to keep appending the data to the text view. Keep storing the data in some array. Use this array in setAdapter method of listview