Sunday, October 16, 2011

List the saved files in Internal Storage

To list the saved files in Internal Storage, the method fileList() can be used. It returns an array of strings naming the private files associated with this Context's application package.

It's a example, in ShowSavedFiles() method, get the saved file name and list in ListView.

List the saved files in Internal Storage

package com.exercise.AndroidInternalStorage;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Toast;

public class AndroidInternalStorageActivity extends Activity {

EditText edFileName, edContent;
Button btnSave;
ListView listSavedFiles;

String[] SavedFiles;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
edFileName = (EditText)findViewById(R.id.filename);
edContent = (EditText)findViewById(R.id.content);
btnSave = (Button)findViewById(R.id.save);
listSavedFiles = (ListView)findViewById(R.id.list);

ShowSavedFiles();

btnSave.setOnClickListener(new Button.OnClickListener(){

@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
String fileName = edFileName.getText().toString();
String content = edContent.getText().toString();

FileOutputStream fos;
try {
fos = openFileOutput(fileName, Context.MODE_PRIVATE);
fos.write(content.getBytes());
fos.close();

Toast.makeText(
AndroidInternalStorageActivity.this,
fileName + " saved",
Toast.LENGTH_LONG).show();

} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

ShowSavedFiles();

}});

}

void ShowSavedFiles(){
SavedFiles = getApplicationContext().fileList();
ArrayAdapter<String> adapter
= new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1,
SavedFiles);

listSavedFiles.setAdapter(adapter);
}
}


<?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:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello"
/>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Enter File Name" />
<EditText
android:id="@+id/filename"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Enter Content" />
<EditText
android:id="@+id/content"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
<Button
android:id="@+id/save"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Save"/>
<ListView
android:id="@+id/list"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
</LinearLayout>


Download the files.

next:
- Read file from Internal Storage via FileInputStream



8 comments:

Unknown said...

Hi,
How do I download a file directly into the private folder?
Also, how do I access it from there after downloading? Kindly help! Urgent!

Unknown said...

How to delete the saved file?

Erik said...

hello andoy,

Please refer Delete file in Internal Storage

Tse said...

Hello.

This tutorial is really exciting. I'm newbie. I have a question. How save 3 or 4 edittext in one list row? fileList() method saved only one fos(FILEOUTPUTSTREAM) file. How solve this problem? please.

Thank you.

Erik said...

In my understand, you can retrieve the text from the various edittext, and add them together to have one String.

ex.
String result = edittext1.getText().toString + edittext2.getText().toString +
...;

Hel zasal said...

Hello.
I put in 2 items and 1 image in internal storage list row so how solve this problem. could u create another example please. it's important to me.
please!!!

Unknown said...

how to open the saved files

Erik said...

hello Hanisha Sachdeva,

Refer to the next post Read file from Internal Storage via FileInputStream.