Java tutorial
/* * Copyright (C) 2014 AChep@xda <artemchep@gmail.com> * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, * MA 02110-1301, USA. */ package com.achep.acdisplay.ui; import android.content.res.Resources; import android.os.Build; import android.support.annotation.NonNull; import android.support.v4.app.DialogFragment; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentTransaction; import android.support.v7.app.AppCompatActivity; import android.text.Html; import com.achep.acdisplay.R; import com.achep.base.Device; import com.achep.base.permissions.Permission; import com.achep.base.tests.Check; import com.achep.base.ui.fragments.dialogs.AboutDialog; import com.achep.base.ui.fragments.dialogs.DonateDialog; import com.achep.base.ui.fragments.dialogs.FeedbackDialog; import com.achep.base.ui.fragments.dialogs.HelpDialog; import com.achep.base.ui.fragments.dialogs.PermissionsDialog; import com.achep.base.utils.ResUtils; import com.afollestad.materialdialogs.MaterialDialog; /** * Helper class for showing fragment dialogs. */ public class DialogHelper { public static final String TAG_FRAGMENT_ABOUT = "dialog_about"; public static final String TAG_FRAGMENT_PERMISSIONS = "dialog_permissions"; public static final String TAG_FRAGMENT_HELP = "dialog_help"; public static final String TAG_FRAGMENT_DONATION = "dialog_donate"; public static final String TAG_FRAGMENT_FEEDBACK = "dialog_feedback"; /** * Shows the "About" dialog that contains some info about the program, * developers and used libraries and tools. */ public static void showAboutDialog(@NonNull AppCompatActivity activity) { showDialog(activity, AboutDialog.class, TAG_FRAGMENT_ABOUT); } /** * Shows the "Help" dialog that contains some frequently asked questions * and some answers on them. This is the dialog that nobody reads :( */ public static void showHelpDialog(@NonNull AppCompatActivity activity) { showDialog(activity, HelpDialog.class, TAG_FRAGMENT_HELP); } public static void showDonateDialog(@NonNull AppCompatActivity activity) { showDialog(activity, DonateDialog.class, TAG_FRAGMENT_DONATION); } public static void showCryDialog(@NonNull AppCompatActivity activity) { Check.getInstance().isInMainThread(); Resources res = activity.getResources(); CharSequence message = Html.fromHtml(res.getString(R.string.cry_dialog_message)); new MaterialDialog.Builder(activity).iconRes(R.drawable.ic_action_about_white) .title(R.string.cry_dialog_title).content(message).negativeText(R.string.close).build().show(); } public static void showCompatDialog(@NonNull AppCompatActivity activity) { Check.getInstance().isInMainThread(); int[] pairs = { R.string.compat_dialog_item_notification, android.os.Build.VERSION_CODES.JELLY_BEAN_MR2, R.string.compat_dialog_item_immersive_mode, android.os.Build.VERSION_CODES.KITKAT, R.string.compat_dialog_item_music_widget, android.os.Build.VERSION_CODES.KITKAT, }; // Check over all pairs. boolean empty = true; for (int i = 1; i < pairs.length; i += 2) { final int api = pairs[i]; if (!Device.hasTargetApi(api)) { empty = false; break; } } if (empty) return; String formatter = activity.getString(R.string.compat_dialog_item_formatter); StringBuilder builder = new StringBuilder(); for (int i = 0; i < pairs.length; i += 2) { final int api = pairs[i + 1]; if (!Device.hasTargetApi(api)) { String str = activity.getString(pairs[i]); str = String.format(formatter, str); builder.append(str); } } String message = ResUtils.getString(activity, R.string.compat_dialog_message, Build.VERSION.RELEASE, builder); new MaterialDialog.Builder(activity).iconRes(R.drawable.ic_dialog_compat_white) .title(R.string.compat_dialog_title).content(message).negativeText(R.string.close).build().show(); } public static void showFeedbackDialog(@NonNull AppCompatActivity activity) { showDialog(activity, FeedbackDialog.class, TAG_FRAGMENT_FEEDBACK); } public static void showPermissionsDialog(@NonNull AppCompatActivity activity, @NonNull Permission[] permissions) { showDialog(activity, PermissionsDialog.newInstance(permissions), TAG_FRAGMENT_PERMISSIONS); } //-- INTERNAL ------------------------------------------------------------- private static void showDialog(@NonNull AppCompatActivity activity, @NonNull Class clazz, @NonNull String tag) { DialogFragment df; try { df = (DialogFragment) clazz.newInstance(); } catch (Exception e) { throw new RuntimeException(e); } showDialog(activity, df, tag); } private static void showDialog(@NonNull AppCompatActivity activity, @NonNull DialogFragment fragment, @NonNull String tag) { Check.getInstance().isInMainThread(); FragmentManager fm = activity.getSupportFragmentManager(); FragmentTransaction ft = fm.beginTransaction(); Fragment prev = fm.findFragmentByTag(tag); if (prev != null) ft.remove(prev); ft.addToBackStack(null); fragment.show(ft, tag); } }