MainActivity.java

package com.afollestad.materialdialogssample;

import android.Manifest;
import android.annotation.TargetApi;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.os.Build;
import android.os.Bundle;
import android.os.Handler;
import android.support.annotation.ColorInt;
import android.support.annotation.NonNull;
import android.support.annotation.StringRes;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.text.Editable;
import android.text.Html;
import android.text.InputType;
import android.text.TextWatcher;
import android.text.method.PasswordTransformationMethod;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.Toast;

import com.afollestad.materialdialogs.DialogAction;
import com.afollestad.materialdialogs.GravityEnum;
import com.afollestad.materialdialogs.MaterialDialog;
import com.afollestad.materialdialogs.StackingBehavior;
import com.afollestad.materialdialogs.Theme;
import com.afollestad.materialdialogs.color.CircleView;
import com.afollestad.materialdialogs.color.ColorChooserDialog;
import com.afollestad.materialdialogs.folderselector.FileChooserDialog;
import com.afollestad.materialdialogs.folderselector.FolderChooserDialog;
import com.afollestad.materialdialogs.internal.MDTintHelper;
import com.afollestad.materialdialogs.internal.ThemeSingleton;
import com.afollestad.materialdialogs.simplelist.MaterialSimpleListAdapter;
import com.afollestad.materialdialogs.simplelist.MaterialSimpleListItem;
import com.afollestad.materialdialogs.util.DialogUtils;

import java.io.File;

import butterknife.ButterKnife;
import butterknife.OnClick;

/** @author Aidan Follestad (afollestad) */
public class MainActivity extends AppCompatActivity
    implements FolderChooserDialog.FolderCallback,
        FileChooserDialog.FileCallback,
        ColorChooserDialog.ColorCallback {

  private static final int STORAGE_PERMISSION_RC = 69;
  static int index = 0;
  // Custom View Dialog
  private EditText passwordInput;
  private View positiveAction;
  // color chooser dialog
  private int primaryPreselect;
  // UTILITY METHODS
  private int accentPreselect;
  private Toast toast;
  private Thread thread;
  private Handler handler;
  private int chooserDialog;

  private void showToast(String message) {
    if (toast != null) {
      toast.cancel();
      toast = null;
    }
    toast = Toast.makeText(this, message, Toast.LENGTH_SHORT);
    toast.show();
  }

  private void startThread(Runnable run) {
    if (thread != null) {
      thread.interrupt();
    }
    thread = new Thread(run);
    thread.start();
  }

  // BEGIN SAMPLE

  private void showToast(@StringRes int message) {
    showToast(getString(message));
  }

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    ButterKnife.bind(this);

    handler = new Handler();
    primaryPreselect = DialogUtils.resolveColor(this, R.attr.colorPrimary);
    accentPreselect = DialogUtils.resolveColor(this, R.attr.colorAccent);
  }

  @Override
  protected void onDestroy() {
    super.onDestroy();
    handler = null;
  }

  @Override
  protected void onPause() {
    super.onPause();
    if (thread != null && !thread.isInterrupted() && thread.isAlive()) {
      thread.interrupt();
    }
  }

  @OnClick(R.id.basicNoTitle)
  public void showBasicNoTitle() {
    new MaterialDialog.Builder(this)
        .content(R.string.shareLocationPrompt)
        .positiveText(R.string.agree)
        .negativeText(R.string.disagree)
        .show();
  }

  @OnClick(R.id.basic)
  public void showBasic() {
    new MaterialDialog.Builder(this)
        .title(R.string.useGoogleLocationServices)
        .content(R.string.useGoogleLocationServicesPrompt)
        .positiveText(R.string.agree)
        .negativeText(R.string.disagree)
        .show();
  }

  @OnClick(R.id.basicLongContent)
  public void showBasicLongContent() {
    new MaterialDialog.Builder(this)
        .title(R.string.useGoogleLocationServices)
        .content(R.string.loremIpsum)
        .positiveText(R.string.agree)
        .negativeText(R.string.disagree)
        .show();
  }

  @OnClick(R.id.basicIcon)
  public void showBasicIcon() {
    new MaterialDialog.Builder(this)
        .iconRes(R.mipmap.ic_launcher)
        .limitIconToDefaultSize() // limits the displayed icon size to 48dp
        .title(R.string.useGoogleLocationServices)
        .content(R.string.useGoogleLocationServicesPrompt)
        .positiveText(R.string.agree)
        .negativeText(R.string.disagree)
        .show();
  }

  @OnClick(R.id.basicCheckPrompt)
  public void showBasicCheckPrompt() {
    new MaterialDialog.Builder(this)
        .iconRes(R.mipmap.ic_launcher)
        .limitIconToDefaultSize()
        .title(Html.fromHtml(getString(R.string.permissionSample, getString(R.string.app_name))))
        .positiveText(R.string.allow)
        .negativeText(R.string.deny)
        .onAny((dialog, which) -> showToast("Prompt checked? " + dialog.isPromptCheckBoxChecked()))
        .checkBoxPromptRes(R.string.dont_ask_again, false, null)
        .show();
  }

  @OnClick(R.id.stacked)
  public void showStacked() {
    new MaterialDialog.Builder(this)
        .title(R.string.useGoogleLocationServices)
        .content(R.string.useGoogleLocationServicesPrompt)
        .positiveText(R.string.speedBoost)
        .negativeText(R.string.noThanks)
        .btnStackedGravity(GravityEnum.END)
        .stackingBehavior(
            StackingBehavior
                .ALWAYS) // this generally should not be forced, but is used for demo purposes
        .show();
  }

  @OnClick(R.id.neutral)
  public void showNeutral() {
    new MaterialDialog.Builder(this)
        .title(R.string.useGoogleLocationServices)
        .content(R.string.useGoogleLocationServicesPrompt)
        .positiveText(R.string.agree)
        .negativeText(R.string.disagree)
        .neutralText(R.string.more_info)
        .show();
  }

  @OnClick(R.id.callbacks)
  public void showCallbacks() {
    new MaterialDialog.Builder(this)
        .title(R.string.useGoogleLocationServices)
        .content(R.string.useGoogleLocationServicesPrompt)
        .positiveText(R.string.agree)
        .negativeText(R.string.disagree)
        .neutralText(R.string.more_info)
        .onAny((dialog, which) -> showToast(which.name() + "!"))
        .show();
  }

  @OnClick(R.id.list)
  public void showList() {
    new MaterialDialog.Builder(this)
        .title(R.string.socialNetworks)
        .items(R.array.socialNetworks)
        .itemsCallback((dialog, view, which, text) -> showToast(which + ": " + text))
        .show();
  }

  @OnClick(R.id.listNoTitle)
  public void showListNoTitle() {
    new MaterialDialog.Builder(this)
        .items(R.array.socialNetworks)
        .itemsCallback((dialog, view, which, text) -> showToast(which + ": " + text))
        .show();
  }

  @OnClick(R.id.longList)
  public void showLongList() {
    new MaterialDialog.Builder(this)
        .title(R.string.states)
        .items(R.array.states)
        .itemsCallback((dialog, view, which, text) -> showToast(which + ": " + text))
        .positiveText(android.R.string.cancel)
        .show();
  }

  @OnClick(R.id.list_longItems)
  public void showListLongItems() {
    new MaterialDialog.Builder(this)
        .title(R.string.socialNetworks)
        .items(R.array.socialNetworks_longItems)
        .itemsCallback((dialog, view, which, text) -> showToast(which + ": " + text))
        .show();
  }

  @OnClick(R.id.list_checkPrompt)
  public void showListCheckPrompt() {
    new MaterialDialog.Builder(this)
        .title(R.string.socialNetworks)
        .items(R.array.socialNetworks)
        .itemsCallback((dialog, view, which, text) -> showToast(which + ": " + text))
        .checkBoxPromptRes(R.string.example_prompt, true, null)
        .negativeText(android.R.string.cancel)
        .show();
  }

  @SuppressWarnings("ConstantConditions")
  @OnClick(R.id.list_longPress)
  public void showListLongPress() {
    index = 0;
    new MaterialDialog.Builder(this)
        .title(R.string.socialNetworks)
        .items(R.array.socialNetworks)
        .itemsCallback((dialog, view, which, text) -> showToast(which + ": " + text))
        .autoDismiss(false)
        .itemsLongCallback(
            (dialog, itemView, position, text) -> {
              dialog.getItems().remove(position);
              dialog.notifyItemsChanged();
              return false;
            })
        .onNeutral(
            (dialog, which) -> {
              index++;
              dialog.getItems().add("Item " + index);
              dialog.notifyItemInserted(dialog.getItems().size() - 1);
            })
        .neutralText(R.string.add_item)
        .show();
  }

  @OnClick(R.id.singleChoice)
  public void showSingleChoice() {
    new MaterialDialog.Builder(this)
        .title(R.string.socialNetworks)
        .items(R.array.socialNetworks)
        .itemsDisabledIndices(1, 3)
        .itemsCallbackSingleChoice(
            2,
            (dialog, view, which, text) -> {
              showToast(which + ": " + text);
              return true; // allow selection
            })
        .positiveText(R.string.md_choose_label)
        .show();
  }

  @OnClick(R.id.singleChoice_longItems)
  public void showSingleChoiceLongItems() {
    new MaterialDialog.Builder(this)
        .title(R.string.socialNetworks)
        .items(R.array.socialNetworks_longItems)
        .itemsCallbackSingleChoice(
            2,
            (dialog, view, which, text) -> {
              showToast(which + ": " + text);
              return true; // allow selection
            })
        .positiveText(R.string.md_choose_label)
        .show();
  }

  @OnClick(R.id.multiChoice)
  public void showMultiChoice() {
    new MaterialDialog.Builder(this)
        .title(R.string.socialNetworks)
        .items(R.array.socialNetworks)
        .itemsCallbackMultiChoice(
            new Integer[] {1, 3},
            (dialog, which, text) -> {
              StringBuilder str = new StringBuilder();
              for (int i = 0; i < which.length; i++) {
                if (i > 0) {
                  str.append('\n');
                }
                str.append(which[i]);
                str.append(": ");
                str.append(text[i]);
              }
              showToast(str.toString());
              return true; // allow selection
            })
        .onNeutral((dialog, which) -> dialog.clearSelectedIndices())
        .onPositive((dialog, which) -> dialog.dismiss())
        .alwaysCallMultiChoiceCallback()
        .positiveText(R.string.md_choose_label)
        .autoDismiss(false)
        .neutralText(R.string.clear_selection)
        .show();
  }

  @OnClick(R.id.multiChoiceLimited)
  public void showMultiChoiceLimited() {
    new MaterialDialog.Builder(this)
        .title(R.string.socialNetworks)
        .items(R.array.socialNetworks)
        .itemsCallbackMultiChoice(
            new Integer[] {1},
            (dialog, which, text) -> {
              boolean allowSelectionChange =
                  which.length
                      <= 2; // limit selection to 2, the new (un)selection is included in the which array
              if (!allowSelectionChange) {
                showToast(R.string.selection_limit_reached);
              }
              return allowSelectionChange;
            })
        .positiveText(R.string.dismiss)
        .alwaysCallMultiChoiceCallback() // the callback will always be called, to check if (un)selection is still allowed
        .show();
  }

  @OnClick(R.id.multiChoiceLimitedMin)
  public void showMultiChoiceLimitedMin() {
    new MaterialDialog.Builder(this)
        .title(R.string.socialNetworks)
        .items(R.array.socialNetworks)
        .itemsCallbackMultiChoice(
            new Integer[] {1},
            (dialog, which, text) -> {
              boolean allowSelectionChange =
                  which.length
                      >= 1; // selection count must stay above 1, the new (un)selection is included in the which array
              if (!allowSelectionChange) {
                showToast(R.string.selection_min_limit_reached);
              }
              return allowSelectionChange;
            })
        .positiveText(R.string.dismiss)
        .alwaysCallMultiChoiceCallback() // the callback will always be called, to check if (un)selection is still allowed
        .show();
  }

  @OnClick(R.id.multiChoice_longItems)
  public void showMultiChoiceLongItems() {
    new MaterialDialog.Builder(this)
        .title(R.string.socialNetworks)
        .items(R.array.socialNetworks_longItems)
        .itemsCallbackMultiChoice(
            new Integer[] {1, 3},
            (dialog, which, text) -> {
              StringBuilder str = new StringBuilder();
              for (int i = 0; i < which.length; i++) {
                if (i > 0) {
                  str.append('\n');
                }
                str.append(which[i]);
                str.append(": ");
                str.append(text[i]);
              }
              showToast(str.toString());
              return true; // allow selection
            })
        .positiveText(R.string.md_choose_label)
        .show();
  }

  @OnClick(R.id.multiChoice_disabledItems)
  public void showMultiChoiceDisabledItems() {
    new MaterialDialog.Builder(this)
        .title(R.string.socialNetworks)
        .items(R.array.socialNetworks)
        .itemsCallbackMultiChoice(
            new Integer[] {0, 1, 2},
            (dialog, which, text) -> {
              StringBuilder str = new StringBuilder();
              for (int i = 0; i < which.length; i++) {
                if (i > 0) {
                  str.append('\n');
                }
                str.append(which[i]);
                str.append(": ");
                str.append(text[i]);
              }
              showToast(str.toString());
              return true; // allow selection
            })
        .onNeutral((dialog, which) -> dialog.clearSelectedIndices())
        .alwaysCallMultiChoiceCallback()
        .positiveText(R.string.md_choose_label)
        .autoDismiss(false)
        .neutralText(R.string.clear_selection)
        .itemsDisabledIndices(0, 1)
        .show();
  }

  @OnClick(R.id.simpleList)
  public void showSimpleList() {
    final MaterialSimpleListAdapter adapter =
        new MaterialSimpleListAdapter(
            (dialog, index1, item) -> showToast(item.getContent().toString()));
    adapter.add(
        new MaterialSimpleListItem.Builder(this)
            .content("username@gmail.com")
            .icon(R.drawable.ic_account_circle)
            .backgroundColor(Color.WHITE)
            .build());
    adapter.add(
        new MaterialSimpleListItem.Builder(this)
            .content("user02@gmail.com")
            .icon(R.drawable.ic_account_circle)
            .backgroundColor(Color.WHITE)
            .build());
    adapter.add(
        new MaterialSimpleListItem.Builder(this)
            .content(R.string.add_account)
            .icon(R.drawable.ic_content_add)
            .iconPaddingDp(8)
            .build());

    new MaterialDialog.Builder(this).title(R.string.set_backup).adapter(adapter, null).show();
  }

  @OnClick(R.id.customListItems)
  public void showCustomList() {
    final ButtonItemAdapter adapter = new ButtonItemAdapter(this, R.array.socialNetworks);
    adapter.setCallbacks(
        itemIndex -> showToast("Item clicked: " + itemIndex),
        buttonIndex -> showToast("Button clicked: " + buttonIndex));
    new MaterialDialog.Builder(this).title(R.string.socialNetworks).adapter(adapter, null).show();
  }

  @SuppressWarnings("ResourceAsColor")
  @OnClick(R.id.customView)
  public void showCustomView() {
    MaterialDialog dialog =
        new MaterialDialog.Builder(this)
            .title(R.string.googleWifi)
            .customView(R.layout.dialog_customview, true)
            .positiveText(R.string.connect)
            .negativeText(android.R.string.cancel)
            .onPositive(
                (dialog1, which) -> showToast("Password: " + passwordInput.getText().toString()))
            .build();

    positiveAction = dialog.getActionButton(DialogAction.POSITIVE);
    //noinspection ConstantConditions
    passwordInput = (EditText) dialog.getCustomView().findViewById(R.id.password);
    passwordInput.addTextChangedListener(
        new TextWatcher() {
          @Override
          public void beforeTextChanged(CharSequence s, int start, int count, int after) {}

          @Override
          public void onTextChanged(CharSequence s, int start, int before, int count) {
            positiveAction.setEnabled(s.toString().trim().length() > 0);
          }

          @Override
          public void afterTextChanged(Editable s) {}
        });

    // Toggling the show password CheckBox will mask or unmask the password input EditText
    CheckBox checkbox = (CheckBox) dialog.getCustomView().findViewById(R.id.showPassword);
    checkbox.setOnCheckedChangeListener(
        (buttonView, isChecked) -> {
          passwordInput.setInputType(
              !isChecked ? InputType.TYPE_TEXT_VARIATION_PASSWORD : InputType.TYPE_CLASS_TEXT);
          passwordInput.setTransformationMethod(
              !isChecked ? PasswordTransformationMethod.getInstance() : null);
        });

    int widgetColor = ThemeSingleton.get().widgetColor;
    MDTintHelper.setTint(
        checkbox, widgetColor == 0 ? ContextCompat.getColor(this, R.color.accent) : widgetColor);

    MDTintHelper.setTint(
        passwordInput,
        widgetColor == 0 ? ContextCompat.getColor(this, R.color.accent) : widgetColor);

    dialog.show();
    positiveAction.setEnabled(false); // disabled by default
  }

  @OnClick(R.id.customView_webView)
  public void showCustomWebView() {
    int accentColor = ThemeSingleton.get().widgetColor;
    if (accentColor == 0) {
      accentColor = ContextCompat.getColor(this, R.color.accent);
    }
    ChangelogDialog.create(false, accentColor).show(getSupportFragmentManager(), "changelog");
  }

  @OnClick(R.id.customView_datePicker)
  public void showCustomDatePicker() {
    new MaterialDialog.Builder(this)
        .title(R.string.date_picker)
        .customView(R.layout.dialog_datepicker, false)
        .positiveText(android.R.string.ok)
        .negativeText(android.R.string.cancel)
        .show();
  }

  @OnClick(R.id.colorChooser_primary)
  public void showColorChooserPrimary() {
    new ColorChooserDialog.Builder(this, R.string.color_palette)
        .titleSub(R.string.colors)
        .preselect(primaryPreselect)
        .show();
  }

  @OnClick(R.id.colorChooser_accent)
  public void showColorChooserAccent() {
    new ColorChooserDialog.Builder(this, R.string.color_palette)
        .titleSub(R.string.colors)
        .accentMode(true)
        .preselect(accentPreselect)
        .show();
  }

  @OnClick(R.id.colorChooser_customColors)
  public void showColorChooserCustomColors() {
    int[][] subColors =
        new int[][] {
          new int[] {
            Color.parseColor("#EF5350"), Color.parseColor("#F44336"), Color.parseColor("#E53935")
          },
          new int[] {
            Color.parseColor("#EC407A"), Color.parseColor("#E91E63"), Color.parseColor("#D81B60")
          },
          new int[] {
            Color.parseColor("#AB47BC"), Color.parseColor("#9C27B0"), Color.parseColor("#8E24AA")
          },
          new int[] {
            Color.parseColor("#7E57C2"), Color.parseColor("#673AB7"), Color.parseColor("#5E35B1")
          },
          new int[] {
            Color.parseColor("#5C6BC0"), Color.parseColor("#3F51B5"), Color.parseColor("#3949AB")
          },
          new int[] {
            Color.parseColor("#42A5F5"), Color.parseColor("#2196F3"), Color.parseColor("#1E88E5")
          }
        };

    new ColorChooserDialog.Builder(this, R.string.color_palette)
        .titleSub(R.string.colors)
        .preselect(primaryPreselect)
        .customColors(R.array.custom_colors, subColors)
        .show();
  }

  @OnClick(R.id.colorChooser_customColorsNoSub)
  public void showColorChooserCustomColorsNoSub() {
    new ColorChooserDialog.Builder(this, R.string.color_palette)
        .titleSub(R.string.colors)
        .preselect(primaryPreselect)
        .customColors(R.array.custom_colors, null)
        .show();
  }

  // Receives callback from color chooser dialog
  @Override
  public void onColorSelection(@NonNull ColorChooserDialog dialog, @ColorInt int color) {
    if (dialog.isAccentMode()) {
      accentPreselect = color;
      ThemeSingleton.get().positiveColor = DialogUtils.getActionTextStateList(this, color);
      ThemeSingleton.get().neutralColor = DialogUtils.getActionTextStateList(this, color);
      ThemeSingleton.get().negativeColor = DialogUtils.getActionTextStateList(this, color);
      ThemeSingleton.get().widgetColor = color;
    } else {
      primaryPreselect = color;
      if (getSupportActionBar() != null) {
        getSupportActionBar().setBackgroundDrawable(new ColorDrawable(color));
      }
      if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
        getWindow().setStatusBarColor(CircleView.shiftColorDown(color));
        getWindow().setNavigationBarColor(color);
      }
    }
  }

  @Override
  public void onColorChooserDismissed(@NonNull ColorChooserDialog dialog) {
    showToast("Color chooser dismissed!");
  }

  @OnClick(R.id.themed)
  public void showThemed() {
    new MaterialDialog.Builder(this)
        .title(R.string.useGoogleLocationServices)
        .content(R.string.useGoogleLocationServicesPrompt)
        .positiveText(R.string.agree)
        .negativeText(R.string.disagree)
        .positiveColorRes(R.color.material_red_400)
        .negativeColorRes(R.color.material_red_400)
        .titleGravity(GravityEnum.CENTER)
        .titleColorRes(R.color.material_red_400)
        .contentColorRes(android.R.color.white)
        .backgroundColorRes(R.color.material_blue_grey_800)
        .dividerColorRes(R.color.accent)
        .btnSelector(R.drawable.md_btn_selector_custom, DialogAction.POSITIVE)
        .positiveColor(Color.WHITE)
        .negativeColorAttr(android.R.attr.textColorSecondaryInverse)
        .theme(Theme.DARK)
        .show();
  }

  @OnClick(R.id.showCancelDismiss)
  public void showShowCancelDismissCallbacks() {
    new MaterialDialog.Builder(this)
        .title(R.string.useGoogleLocationServices)
        .content(R.string.useGoogleLocationServicesPrompt)
        .positiveText(R.string.agree)
        .negativeText(R.string.disagree)
        .neutralText(R.string.more_info)
        .showListener(dialog -> showToast("onShow"))
        .cancelListener(dialog -> showToast("onCancel"))
        .dismissListener(dialog -> showToast("onDismiss"))
        .show();
  }

  @TargetApi(Build.VERSION_CODES.JELLY_BEAN)
  @OnClick(R.id.file_chooser)
  public void showFileChooser() {
    chooserDialog = R.id.file_chooser;
    if (ActivityCompat.checkSelfPermission(
            MainActivity.this, Manifest.permission.READ_EXTERNAL_STORAGE)
        != PackageManager.PERMISSION_GRANTED) {
      ActivityCompat.requestPermissions(
          MainActivity.this,
          new String[] {Manifest.permission.READ_EXTERNAL_STORAGE},
          STORAGE_PERMISSION_RC);
      return;
    }
    new FileChooserDialog.Builder(this).show();
  }

  @Override
  public void onFileSelection(@NonNull FileChooserDialog dialog, @NonNull File file) {
    showToast(file.getAbsolutePath());
  }

  @Override
  public void onFileChooserDismissed(@NonNull FileChooserDialog dialog) {
    showToast("File chooser dismissed!");
  }

  @TargetApi(Build.VERSION_CODES.JELLY_BEAN)
  @OnClick(R.id.folder_chooser)
  public void showFolderChooser() {
    chooserDialog = R.id.folder_chooser;
    if (ActivityCompat.checkSelfPermission(
            MainActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE)
        != PackageManager.PERMISSION_GRANTED) {
      ActivityCompat.requestPermissions(
          MainActivity.this,
          new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE},
          STORAGE_PERMISSION_RC);
      return;
    }
    new FolderChooserDialog.Builder(MainActivity.this)
        .chooseButton(R.string.md_choose_label)
        .allowNewFolder(true, 0)
        .show();
  }

  @Override
  public void onFolderSelection(@NonNull FolderChooserDialog dialog, @NonNull File folder) {
    showToast(folder.getAbsolutePath());
  }

  @Override
  public void onFolderChooserDismissed(@NonNull FolderChooserDialog dialog) {
    showToast("Folder chooser dismissed!");
  }

  @OnClick(R.id.input)
  public void showInputDialog() {
    new MaterialDialog.Builder(this)
        .title(R.string.input)
        .content(R.string.input_content)
        .inputType(
            InputType.TYPE_CLASS_TEXT
                | InputType.TYPE_TEXT_VARIATION_PERSON_NAME
                | InputType.TYPE_TEXT_FLAG_CAP_WORDS)
        .inputRange(2, 16)
        .positiveText(R.string.submit)
        .input(
            R.string.input_hint,
            R.string.input_hint,
            false,
            (dialog, input) -> showToast("Hello, " + input.toString() + "!"))
        .show();
  }

  @OnClick(R.id.input_custominvalidation)
  public void showInputDialogCustomInvalidation() {
    new MaterialDialog.Builder(this)
        .title(R.string.input)
        .content(R.string.input_content_custominvalidation)
        .inputType(
            InputType.TYPE_CLASS_TEXT
                | InputType.TYPE_TEXT_VARIATION_PERSON_NAME
                | InputType.TYPE_TEXT_FLAG_CAP_WORDS)
        .positiveText(R.string.submit)
        .alwaysCallInputCallback() // this forces the callback to be invoked with every input change
        .input(
            R.string.input_hint,
            0,
            false,
            (dialog, input) -> {
              if (input.toString().equalsIgnoreCase("hello")) {
                dialog.setContent("I told you not to type that!");
                dialog.getActionButton(DialogAction.POSITIVE).setEnabled(false);
              } else {
                dialog.setContent(R.string.input_content_custominvalidation);
                dialog.getActionButton(DialogAction.POSITIVE).setEnabled(true);
              }
            })
        .show();
  }

  @OnClick(R.id.input_checkPrompt)
  public void showInputDialogCheckPrompt() {
    new MaterialDialog.Builder(this)
        .title(R.string.input)
        .content(R.string.input_content)
        .inputType(
            InputType.TYPE_CLASS_TEXT
                | InputType.TYPE_TEXT_VARIATION_PERSON_NAME
                | InputType.TYPE_TEXT_FLAG_CAP_WORDS)
        .inputRange(2, 16)
        .positiveText(R.string.submit)
        .input(
            R.string.input_hint,
            R.string.input_hint,
            false,
            (dialog, input) -> showToast("Hello, " + input.toString() + "!"))
        .checkBoxPromptRes(R.string.example_prompt, true, null)
        .show();
  }

  @OnClick(R.id.progress1)
  public void showProgressDeterminateDialog() {
    new MaterialDialog.Builder(this)
        .title(R.string.progress_dialog)
        .content(R.string.please_wait)
        .contentGravity(GravityEnum.CENTER)
        .progress(false, 150, true)
        .cancelListener(
            dialog -> {
              if (thread != null) {
                thread.interrupt();
              }
            })
        .showListener(
            dialogInterface -> {
              final MaterialDialog dialog = (MaterialDialog) dialogInterface;
              startThread(
                  () -> {
                    while (dialog.getCurrentProgress() != dialog.getMaxProgress()
                        && !Thread.currentThread().isInterrupted()) {
                      if (dialog.isCancelled()) {
                        break;
                      }
                      try {
                        Thread.sleep(50);
                      } catch (InterruptedException e) {
                        break;
                      }
                      dialog.incrementProgress(1);
                    }
                    runOnUiThread(
                        () -> {
                          thread = null;
                          dialog.setContent(getString(R.string.md_done_label));
                        });
                  });
            })
        .show();
  }

  @OnClick(R.id.progress2)
  public void showProgressIndeterminateDialog() {
    showIndeterminateProgressDialog(false);
  }

  @OnClick(R.id.progress3)
  public void showProgressHorizontalIndeterminateDialog() {
    showIndeterminateProgressDialog(true);
  }

  private void showIndeterminateProgressDialog(boolean horizontal) {
    new MaterialDialog.Builder(this)
        .title(R.string.progress_dialog)
        .content(R.string.please_wait)
        .progress(true, 0)
        .progressIndeterminateStyle(horizontal)
        .show();
  }

  @OnClick(R.id.preference_dialogs)
  public void showPreferenceDialogs() {
    if (Build.VERSION.SDK_INT > Build.VERSION_CODES.GINGERBREAD_MR1) {
      startActivity(new Intent(getApplicationContext(), PreferenceActivity.class));
    } else {
      startActivity(new Intent(getApplicationContext(), PreferenceActivityCompat.class));
    }
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.main, menu);
    return super.onCreateOptionsMenu(menu);
  }

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    if (item.getItemId() == R.id.about) {
      AboutDialog.show(this);
      return true;
    }
    return super.onOptionsItemSelected(item);
  }

  @Override
  public void onRequestPermissionsResult(
      int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
    super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    if (requestCode == STORAGE_PERMISSION_RC) {
      if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
        handler.postDelayed(() -> findViewById(chooserDialog).performClick(), 1000);
      } else {
        Toast.makeText(
                this,
                "The folder or file chooser will not work without "
                    + "permission to read external storage.",
                Toast.LENGTH_LONG)
            .show();
      }
    }
  }
}