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@@ -0,0 +1,201 @@
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+package com.afollestad.materialdialogs.folderselector;
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+
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+import android.Manifest;
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+import android.app.Activity;
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+import android.app.Dialog;
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+import android.content.pm.PackageManager;
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+import android.os.Bundle;
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+import android.os.Environment;
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+import android.support.annotation.NonNull;
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+import android.support.annotation.Nullable;
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+import android.support.annotation.StringRes;
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+import android.support.v4.app.ActivityCompat;
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+import android.support.v4.app.DialogFragment;
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+import android.support.v4.app.Fragment;
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+import android.support.v7.app.AppCompatActivity;
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+import android.view.View;
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+
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+import com.afollestad.materialdialogs.MaterialDialog;
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+import com.afollestad.materialdialogs.commons.R;
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+
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+import java.io.File;
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+import java.io.Serializable;
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+import java.util.ArrayList;
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+import java.util.Collections;
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+import java.util.Comparator;
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+import java.util.List;
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+
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+/**
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+ * @author Aidan Follestad (afollestad)
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+ */
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+public class FolderSelectorDialog extends DialogFragment implements MaterialDialog.ListCallback {
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+
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+ private final static String TAG = "[MD_FOLDER_SELECTOR]";
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+
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+ private File parentFolder;
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+ private File[] parentContents;
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+ private boolean canGoUp = true;
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+ private FolderCallback mCallback;
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+
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+ private final MaterialDialog.ButtonCallback mButtonCallback = new MaterialDialog.ButtonCallback() {
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+ @Override
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+ public void onPositive(MaterialDialog materialDialog) {
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+ materialDialog.dismiss();
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+ mCallback.onFolderSelection(parentFolder);
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+ }
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+
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+ @Override
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+ public void onNegative(MaterialDialog materialDialog) {
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+ materialDialog.dismiss();
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+ }
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+ };
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+
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+ public interface FolderCallback {
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+ void onFolderSelection(File folder);
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+ }
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+
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+ public FolderSelectorDialog() {
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+ }
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+
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+ String[] getContentsArray() {
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+ if (parentContents == null) return new String[]{};
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+ String[] results = new String[parentContents.length + (canGoUp ? 1 : 0)];
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+ if (canGoUp) results[0] = "...";
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+ for (int i = 0; i < parentContents.length; i++)
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+ results[canGoUp ? i + 1 : i] = parentContents[i].getName();
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+ return results;
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+ }
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+
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+ File[] listFiles() {
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+ File[] contents = parentFolder.listFiles();
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+ List<File> results = new ArrayList<>();
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+ if (contents != null) {
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+ for (File fi : contents) {
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+ if (fi.isDirectory()) results.add(fi);
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+ }
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+ Collections.sort(results, new FolderSorter());
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+ return results.toArray(new File[results.size()]);
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+ }
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+ return null;
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+ }
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+
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+ @SuppressWarnings("ConstantConditions")
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+ @NonNull
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+ @Override
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+ public Dialog onCreateDialog(Bundle savedInstanceState) {
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+ if (ActivityCompat.checkSelfPermission(getActivity(), Manifest.permission.READ_EXTERNAL_STORAGE) !=
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+ PackageManager.PERMISSION_GRANTED) {
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+ return new MaterialDialog.Builder(getActivity())
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+ .title(R.string.md_error_label)
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+ .content(R.string.md_storage_perm_error)
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+ .positiveText(android.R.string.ok)
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+ .build();
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+ }
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+
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+ if (getArguments() == null || !getArguments().containsKey("builder"))
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+ throw new IllegalStateException("You must create a FolderSelectorDialog using the Builder.");
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+ if (!getArguments().containsKey("current_path"))
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+ getArguments().putString("current_path", getBuilder().mInitialPath);
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+ parentFolder = new File(getArguments().getString("current_path"));
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+ parentContents = listFiles();
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+ return new MaterialDialog.Builder(getActivity())
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+ .title(parentFolder.getAbsolutePath())
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+ .items(getContentsArray())
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+ .itemsCallback(this)
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+ .callback(mButtonCallback)
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+ .autoDismiss(false)
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+ .positiveText(R.string.md_choose_label)
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+ .negativeText(android.R.string.cancel)
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+ .build();
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+ }
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+
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+ @Override
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+ public void onSelection(MaterialDialog materialDialog, View view, int i, CharSequence s) {
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+ if (canGoUp && i == 0) {
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+ parentFolder = parentFolder.getParentFile();
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+ canGoUp = parentFolder.getParent() != null;
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+ } else {
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+ parentFolder = parentContents[canGoUp ? i - 1 : i];
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+ canGoUp = true;
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+ }
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+ parentContents = listFiles();
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+ MaterialDialog dialog = (MaterialDialog) getDialog();
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+ dialog.setTitle(parentFolder.getAbsolutePath());
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+ getArguments().putString("current_path", parentFolder.getAbsolutePath());
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+ dialog.setItems(getContentsArray());
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+ }
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+
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+ @Override
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+ public void onAttach(Activity activity) {
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+ super.onAttach(activity);
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+ mCallback = (FolderCallback) activity;
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+ }
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+
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+ public void show(AppCompatActivity context) {
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+ Fragment frag = context.getSupportFragmentManager().findFragmentByTag(TAG);
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+ if (frag != null) {
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+ ((DialogFragment) frag).dismiss();
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+ context.getSupportFragmentManager().beginTransaction()
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+ .remove(frag).commit();
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+ }
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+ show(context.getSupportFragmentManager(), TAG);
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+ }
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+
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+ public static class Builder implements Serializable {
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+
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+ @NonNull
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+ protected final transient AppCompatActivity mContext;
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+ @StringRes
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+ protected int mChooseButton;
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+ protected String mInitialPath;
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+
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+ public <ActivityType extends AppCompatActivity & FolderCallback> Builder(@NonNull ActivityType context) {
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+ mContext = context;
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+ mChooseButton = R.string.md_choose_label;
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+ mInitialPath = Environment.getExternalStorageDirectory().getAbsolutePath();
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+ }
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+
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+ @NonNull
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+ public Builder chooseButton(@StringRes int text) {
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+ mChooseButton = text;
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+ return this;
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+ }
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+
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+ @NonNull
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+ public Builder initialPath(@Nullable String initialPath) {
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+ if (initialPath == null)
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+ initialPath = File.separator;
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+ mInitialPath = initialPath;
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+ return this;
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+ }
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+
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+ @NonNull
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+ public FolderSelectorDialog build() {
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+ FolderSelectorDialog dialog = new FolderSelectorDialog();
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+ Bundle args = new Bundle();
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+ args.putSerializable("builder", this);
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+ dialog.setArguments(args);
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+ return dialog;
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+ }
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+
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+ @NonNull
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+ public FolderSelectorDialog show() {
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+ FolderSelectorDialog dialog = build();
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+ dialog.show(mContext);
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+ return dialog;
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+ }
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+ }
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+
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+ @SuppressWarnings("ConstantConditions")
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+ @NonNull
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+ private Builder getBuilder() {
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+ return (Builder) getArguments().getSerializable("builder");
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+ }
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+
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+ private static class FolderSorter implements Comparator<File> {
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+ @Override
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+ public int compare(File lhs, File rhs) {
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+ return lhs.getName().compareTo(rhs.getName());
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+ }
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+ }
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+}
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Aidan Follestad