ANDROID SOURCE CODE BY MAKING A FILE MANAGE ON ANDROID STUDIO

HERE FIRST IS JAVE CODE FOR MAKING A FILE MANAGER ON ANDROID STUDIO BY USING COPE PASTE CODE.

import android.os.Bundle;

import android.view.View;

import android.widget.ListView;

import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;

import java.io.File;

public class MainActivity extends AppCompatActivity {

    private File currentDir;

    private FileArrayAdapter adapter;

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        currentDir = new File("/sdcard/");

        fill(currentDir);

    }

    private void fill(File f) {

        File[]dirs = f.listFiles();

        this.setTitle("Current Dir: "+f.getName());

        List<Option>dir = new ArrayList<Option>();

        List<Option>fls = new ArrayList<Option>();

        try{

            for(File ff: dirs) {

                if(ff.isDirectory())

                    dir.add(new Option(ff.getName(),"Folder",ff.getAbsolutePath()));

                else {

                    fls.add(new Option(ff.getName(),"File Size: "+ff.length(),ff.getAbsolutePath()));

                }

            }

        }catch(Exception e) {

        }

        Collections.sort(dir);

        Collections.sort(fls);

        dir.addAll(fls);

        if(!f.getName().equalsIgnoreCase("sdcard"))

            dir.add(0,new Option("..","Parent Directory",f.getParent()));

        adapter = new FileArrayAdapter(MainActivity.this,R.layout.file_view,dir);

        this.fileList.setAdapter(adapter);

    }

    @Override

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

        super.onListItemClick(l, v, position, id);

        Option o = adapter.getItem(position);

        if(o.getData().equalsIgnoreCase("folder")||o.getData().equalsIgnoreCase("parent directory")) {

            currentDir = new File(o.getPath());

            fill(currentDir);

        }

        else {

            onFileClick(o);

        }

    }

    private void onFileClick(Option o) {

        Toast.makeText(this, "File Clicked: "+o.getName(), Toast.LENGTH_SHORT).show();

    }

}

HERE IS THE XML CODE OF ANDROID STUDIO BY MAKING A FILE MANAGER ON ANDROID STUDIO.

<?xml version="1.0" encoding="utf-8"?>

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

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="vertical">

    <ListView

        android:id="@+id/file_list"

        android:layout_width="match_parent"

        android:layout_height="wrap_content" />

    <TextView

        android:id="@+id/empty_view"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:text="@string/no_files"

        android:textAlignment="center"

        android:visibility="gone" />

</LinearLayout>

This layout file contains a ListView element to display a list of files and a TextView element to display a message when there are no files to show.

Here is an example of the corresponding Java code to populate the ListView with a list of files:

ListView listView = findViewById(R.id.file_list); File[] files = getFiles(); ArrayAdapter<File> adapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, files); listView.setAdapter(adapter);

This code gets a list of File objects, creates an ArrayAdapter with these files, and sets the adapter on the ListView. The ArrayAdapter will handle populating the ListView with the file names.

PASTE THIS CODE AND MAKE YOUR OWN APP.