Implement a simple File Explorer in Android


It's a simple File Explorer in Android.



The files information can be read using java.io.File, using the code:
File f = new File(dirPath);
File[] files = f.listFiles();

The name of the files/folders will be added in a ArrayList. If it's not the root, two more elements (the root and the parent) will be added in the front of the ArrayList.

Then, the ArrayList will be adapted to a ArrayAdapter, and also set to be displayed on screen.

In case any item is clicked; if it's a file, the name will be display in a dialog; if it's a directory (isDirectory) and can be read (canRead), will open the selected directory; if it's a directory and CANNOT be read, a message will be prompt.




Create a layout file /res/layout/row.xml, which is the layout of each row the the list.
<?xml version="1.0" encoding="utf-8"?>

<TextView

xmlns:android="http://schemas.android.com/apk/res/android"

android:id="@+id/rowtext"

android:layout_width="fill_parent"

android:layout_height="25px"

android:textSize="23sp" />


Modify /res/layout/main.xml to have a List:
<?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/path"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

/>

<ListView

android:id="@android:id/list"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

/>

<TextView

android:id="@android:id/empty"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="No Data"

/>

</LinearLayout>


remark: TextView with id empty will be display IF the list is empty.

Modify the code, AndroidExplorer.java
package com.AndroidExplorer;



import java.io.File;

import java.util.ArrayList;

import java.util.List;

import android.app.AlertDialog;

import android.app.ListActivity;

import android.content.DialogInterface;

import android.os.Bundle;

import android.view.View;

import android.widget.ArrayAdapter;

import android.widget.ListView;

import android.widget.TextView;



public class AndroidExplorer extends ListActivity {



private List<String> item = null;

private List<String> path = null;

private String root="/";

private TextView myPath;



/** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

myPath = (TextView)findViewById(R.id.path);

getDir(root);

}



private void getDir(String dirPath)

{

myPath.setText("Location: " + dirPath);



item = new ArrayList<String>();

path = new ArrayList<String>();



File f = new File(dirPath);

File[] files = f.listFiles();



if(!dirPath.equals(root))

{



item.add(root);

path.add(root);



item.add("../");

path.add(f.getParent());



}



for(int i=0; i < files.length; i++)

{

File file = files[i];

path.add(file.getPath());

if(file.isDirectory())

item.add(file.getName() + "/");

else

item.add(file.getName());

}



ArrayAdapter<String> fileList =

new ArrayAdapter<String>(this, R.layout.row, item);

setListAdapter(fileList);

}



@Override

protected void onListItemClick(ListView l, View v, int position, long id) {



File file = new File(path.get(position));



if (file.isDirectory())

{

if(file.canRead())

getDir(path.get(position));

else

{

new AlertDialog.Builder(this)

.setIcon(R.drawable.icon)

.setTitle("[" + file.getName() + "] folder can't be read!")

.setPositiveButton("OK",

new DialogInterface.OnClickListener() {



@Override

public void onClick(DialogInterface dialog, int which) {

// TODO Auto-generated method stub

}

}).show();

}

}

else

{

new AlertDialog.Builder(this)

.setIcon(R.drawable.icon)

.setTitle("[" + file.getName() + "]")

.setPositiveButton("OK",

new DialogInterface.OnClickListener() {



@Override

public void onClick(DialogInterface dialog, int which) {

// TODO Auto-generated method stub

}

}).show();

}

}

}


- Updated: Example of File Explorer in Android.

{ 0 comments... read them below or add one }

Post a Comment