IconManagerFragment.java

package com.tyron.code.ui.iconmanager;

import android.app.ProgressDialog;
import android.os.Bundle;

import android.view.ViewGroup;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
import androidx.appcompat.widget.Toolbar;
import androidx.recyclerview.widget.GridLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

import com.google.android.material.dialog.MaterialAlertDialogBuilder;
import com.google.android.material.transition.MaterialSharedAxis;

import com.tyron.code.R;
import com.tyron.code.util.UiUtilsKt;
import com.tyron.code.ui.project.ProjectManager;
import com.tyron.completion.progress.ProgressManager;
import com.tyron.common.util.Decompress;
import com.tyron.code.ui.iconmanager.adapter.IconAdapter;

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

import java.util.ArrayList;
import org.w3c.dom.Document;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.w3c.dom.Element;

public class IconManagerFragment extends Fragment {

	public static String TAG = IconManagerFragment.class.getSimpleName();
    private String iconFolderDirectory, projectResourceDirectory;
	private ArrayList<String> iconList = new ArrayList<>();
	private ProgressDialog pDialog;

	@Override
	public void onCreate(@Nullable Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		setEnterTransition(new MaterialSharedAxis(MaterialSharedAxis.X, true));
		setExitTransition(new MaterialSharedAxis(MaterialSharedAxis.X, false));

		iconFolderDirectory = getPackageDirectory() + "/Icons/";
	}

	@Nullable

	@Override

	public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {

		View view = inflater.inflate(R.layout.icon_manager_fragment, container, false);

		pDialog = new ProgressDialog(requireContext());
		RecyclerView recyclerView = view.findViewById(R.id.recyclerview);
		Toolbar toolbar = view.findViewById(R.id.toolbar);
		UiUtilsKt.addSystemWindowInsetToPadding(toolbar, false, true, false, false);
		if (!new File(getPackageDirectory() + "/Icons/").exists()) {
			showConfirmationDialog(recyclerView, pDialog);
		} else {
            loadIcons(iconFolderDirectory, iconList, recyclerView);
		}

		return view;
	}

	@Override

	public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {

	}

	private void showConfirmationDialog(RecyclerView recyclerView, final ProgressDialog progressDialog) {
		MaterialAlertDialogBuilder builder = new MaterialAlertDialogBuilder(requireContext());
		builder.setTitle("Warning!");
		builder.setMessage("Do you want to extract all icons from CodeAssist?");
		builder.setPositiveButton("EXTRACT", (d, w) -> {
        progressDialog.setMessage("Extracting icons");
		progressDialog.setCancelable(false);
		progressDialog.show();
		ProgressManager.getInstance().runNonCancelableAsync(() ->startExtractingIcons(progressDialog, recyclerView));
		});
		builder.setNegativeButton("CANCEL", null);
		builder.create().show();
	}

	private void startExtractingIcons(final ProgressDialog progressDialog, RecyclerView recyclerView) {
		Decompress.unzipFromAssets(requireContext(), "Icons.zip", getPackageDirectory());
		
		ProgressManager.getInstance().runLater(() -> {
			if (progressDialog.isShowing()) {
				progressDialog.dismiss();
					Toast.makeText(requireContext(), "Please restart Icon manager", 3000).show();	
			}
		});
	}

	private void loadIcons(String path, ArrayList<String> list, RecyclerView recyclerView) {
		list.clear();
		getFileList(path, list);
		recyclerView.setNestedScrollingEnabled(false);
		recyclerView.setAdapter(new IconAdapter(list, requireContext()));
		recyclerView.setLayoutManager(new GridLayoutManager(requireContext(), 4));
	}

	private String getPackageDirectory() {
		return requireContext().getExternalFilesDir(null).getAbsolutePath();
	}

	public static void makeDirs(String path) {
		if (!new File(path).exists()) {
			new File(path).mkdirs();
		}
	}

	public static void getFileList(String source, ArrayList<String> list) {
		File dir = new File(source);
		if (!dir.exists() || dir.isFile())
			return;
		File[] listFiles = dir.listFiles();
		if (listFiles == null || listFiles.length <= 0)
			return;
		if (list == null)
			return;
		list.clear();
		for (File file : listFiles) {
			list.add(file.getAbsolutePath());
		}
	}
}