Java tutorial
/** * * Apache License * Version 2.0, January 2004 * http://www.apache.org/licenses/ * * TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION * * 1. Definitions. * * "License" shall mean the terms and conditions for use, reproduction, * and distribution as defined by Sections 1 through 9 of this document. * * "Licensor" shall mean the copyright owner or entity authorized by * the copyright owner that is granting the License. * * "Legal Entity" shall mean the union of the acting entity and all * other entities that control, are controlled by, or are under common * control with that entity. For the purposes of this definition, * "control" means (i) the power, direct or indirect, to cause the * direction or management of such entity, whether by contract or * otherwise, or (ii) ownership of fifty percent (50%) or more of the * outstanding shares, or (iii) beneficial ownership of such entity. * * "You" (or "Your") shall mean an individual or Legal Entity * exercising permissions granted by this License. * * "Source" form shall mean the preferred form for making modifications, * including but not limited to software source code, documentation * source, and configuration files. * * "Object" form shall mean any form resulting from mechanical * transformation or translation of a Source form, including but * not limited to compiled object code, generated documentation, * and conversions to other media types. * * "Work" shall mean the work of authorship, whether in Source or * Object form, made available under the License, as indicated by a * copyright notice that is included in or attached to the work * (an example is provided in the Appendix below). * * "Derivative Works" shall mean any work, whether in Source or Object * form, that is based on (or derived from) the Work and for which the * editorial revisions, annotations, elaborations, or other modifications * represent, as a whole, an original work of authorship. For the purposes * of this License, Derivative Works shall not include works that remain * separable from, or merely link (or bind by name) to the interfaces of, * the Work and Derivative Works thereof. * * "Contribution" shall mean any work of authorship, including * the original version of the Work and any modifications or additions * to that Work or Derivative Works thereof, that is intentionally * submitted to Licensor for inclusion in the Work by the copyright owner * or by an individual or Legal Entity authorized to submit on behalf of * the copyright owner. For the purposes of this definition, "submitted" * means any form of electronic, verbal, or written communication sent * to the Licensor or its representatives, including but not limited to * communication on electronic mailing lists, source code control systems, * and issue tracking systems that are managed by, or on behalf of, the * Licensor for the purpose of discussing and improving the Work, but * excluding communication that is conspicuously marked or otherwise * designated in writing by the copyright owner as "Not a Contribution." * * "Contributor" shall mean Licensor and any individual or Legal Entity * on behalf of whom a Contribution has been received by Licensor and * subsequently incorporated within the Work. * * 2. Grant of Copyright License. Subject to the terms and conditions of * this License, each Contributor hereby grants to You a perpetual, * worldwide, non-exclusive, no-charge, royalty-free, irrevocable * copyright license to reproduce, prepare Derivative Works of, * publicly display, publicly perform, sublicense, and distribute the * Work and such Derivative Works in Source or Object form. * * 3. Grant of Patent License. Subject to the terms and conditions of * this License, each Contributor hereby grants to You a perpetual, * worldwide, non-exclusive, no-charge, royalty-free, irrevocable * (except as stated in this section) patent license to make, have made, * use, offer to sell, sell, import, and otherwise transfer the Work, * where such license applies only to those patent claims licensable * by such Contributor that are necessarily infringed by their * Contribution(s) alone or by combination of their Contribution(s) * with the Work to which such Contribution(s) was submitted. If You * institute patent litigation against any entity (including a * cross-claim or counterclaim in a lawsuit) alleging that the Work * or a Contribution incorporated within the Work constitutes direct * or contributory patent infringement, then any patent licenses * granted to You under this License for that Work shall terminate * as of the date such litigation is filed. * * 4. Redistribution. You may reproduce and distribute copies of the * Work or Derivative Works thereof in any medium, with or without * modifications, and in Source or Object form, provided that You * meet the following conditions: * * (a) You must give any other recipients of the Work or * Derivative Works a copy of this License; and * * (b) You must cause any modified files to carry prominent notices * stating that You changed the files; and * * (c) You must retain, in the Source form of any Derivative Works * that You distribute, all copyright, patent, trademark, and * attribution notices from the Source form of the Work, * excluding those notices that do not pertain to any part of * the Derivative Works; and * * (d) If the Work includes a "NOTICE" text file as part of its * distribution, then any Derivative Works that You distribute must * include a readable copy of the attribution notices contained * within such NOTICE file, excluding those notices that do not * pertain to any part of the Derivative Works, in at least one * of the following places: within a NOTICE text file distributed * as part of the Derivative Works; within the Source form or * documentation, if provided along with the Derivative Works; or, * within a display generated by the Derivative Works, if and * wherever such third-party notices normally appear. The contents * of the NOTICE file are for informational purposes only and * do not modify the License. You may add Your own attribution * notices within Derivative Works that You distribute, alongside * or as an addendum to the NOTICE text from the Work, provided * that such additional attribution notices cannot be construed * as modifying the License. * * You may add Your own copyright statement to Your modifications and * may provide additional or different license terms and conditions * for use, reproduction, or distribution of Your modifications, or * for any such Derivative Works as a whole, provided Your use, * reproduction, and distribution of the Work otherwise complies with * the conditions stated in this License. * * 5. Submission of Contributions. Unless You explicitly state otherwise, * any Contribution intentionally submitted for inclusion in the Work * by You to the Licensor shall be under the terms and conditions of * this License, without any additional terms or conditions. * Notwithstanding the above, nothing herein shall supersede or modify * the terms of any separate license agreement you may have executed * with Licensor regarding such Contributions. * * 6. Trademarks. This License does not grant permission to use the trade * names, trademarks, service marks, or product names of the Licensor, * except as required for reasonable and customary use in describing the * origin of the Work and reproducing the content of the NOTICE file. * * 7. Disclaimer of Warranty. Unless required by applicable law or * agreed to in writing, Licensor provides the Work (and each * Contributor provides its Contributions) on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or * implied, including, without limitation, any warranties or conditions * of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A * PARTICULAR PURPOSE. You are solely responsible for determining the * appropriateness of using or redistributing the Work and assume any * risks associated with Your exercise of permissions under this License. * * 8. Limitation of Liability. In no event and under no legal theory, * whether in tort (including negligence), contract, or otherwise, * unless required by applicable law (such as deliberate and grossly * negligent acts) or agreed to in writing, shall any Contributor be * liable to You for damages, including any direct, indirect, special, * incidental, or consequential damages of any character arising as a * result of this License or out of the use or inability to use the * Work (including but not limited to damages for loss of goodwill, * work stoppage, computer failure or malfunction, or any and all * other commercial damages or losses), even if such Contributor * has been advised of the possibility of such damages. * * 9. Accepting Warranty or Additional Liability. While redistributing * the Work or Derivative Works thereof, You may choose to offer, * and charge a fee for, acceptance of support, warranty, indemnity, * or other liability obligations and/or rights consistent with this * License. However, in accepting such obligations, You may act only * on Your own behalf and on Your sole responsibility, not on behalf * of any other Contributor, and only if You agree to indemnify, * defend, and hold each Contributor harmless for any liability * incurred by, or claims asserted against, such Contributor by reason * of your accepting any such warranty or additional liability. * * END OF TERMS AND CONDITIONS * * APPENDIX: How to apply the Apache License to your work. * * To apply the Apache License to your work, attach the following * boilerplate notice, with the fields enclosed by brackets "[]" * replaced with your own identifying information. (Don't include * the brackets!) The text should be enclosed in the appropriate * comment syntax for the file format. We also recommend that a * file or class name and description of purpose be included on the * same "printed page" as the copyright notice for easier * identification within third-party archives. * * Copyright 2016 Alibaba Group * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.taobao.weex.extend.module.actionsheet; import android.app.Activity; import android.content.Context; import android.content.res.Resources; import android.graphics.Color; import android.os.Build; import android.os.Bundle; import android.os.Handler; import android.support.annotation.Nullable; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentActivity; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentTransaction; import android.text.TextUtils; import android.util.Pair; import android.util.TypedValue; import android.view.Gravity; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.view.animation.AlphaAnimation; import android.view.animation.Animation; import android.view.animation.TranslateAnimation; import android.view.inputmethod.InputMethodManager; import android.widget.FrameLayout; import android.widget.LinearLayout; import android.widget.TextView; import java.lang.reflect.Method; import java.util.ArrayList; import java.util.List; import java.util.Map; /** * Created by moxun on 17/2/10. */ public class WXActionSheet extends Fragment { private static final String KEY_TITLE = "TITLE"; private static final String KEY_MESSAGE = "MESSAGE"; private static final String KEY_ITEMS = "ITEMS"; private static final String KEY_HAS_DISMISSED = "HAS_DISMISSED"; private static final String SEPARATOR = "@##@"; private boolean hasDismissed = true; private boolean hasCancelItemAdded = false; private View backgroundLayer; private ViewGroup decor; private View actionSheetView; private LinearLayout sheetContainer; private ActionListener actionListener; private String titleText; private String messageText; private List<Pair<String, String>> actionItems; private static final int TRANSLATE_DURATION = 200; private static final int ALPHA_DURATION = 300; private static final int COLOR_TITLE = Color.rgb(143, 143, 143); private static final int COLOR_LINE = Color.rgb(219, 219, 219); private static final int COLOR_ITEM_NORMAL = Color.rgb(0, 122, 252); private static final int COLOR_ITEM_ALERT = Color.rgb(255, 59, 48); public void display(final FragmentManager manager, final String tag) { if (!hasDismissed || manager.isDestroyed()) { return; } hasDismissed = false; new Handler().post(new Runnable() { @Override public void run() { FragmentTransaction transaction = manager.beginTransaction(); transaction.add(WXActionSheet.this, tag); transaction.addToBackStack(null); transaction.commitAllowingStateLoss(); } }); } public void dismiss() { if (hasDismissed) { return; } hasDismissed = true; new Handler().post(new Runnable() { @Override public void run() { getFragmentManager().popBackStack(); FragmentTransaction ft = getFragmentManager().beginTransaction(); ft.remove(WXActionSheet.this); ft.commitAllowingStateLoss(); } }); } @Override public void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); if (savedInstanceState != null) { hasDismissed = savedInstanceState.getBoolean(KEY_HAS_DISMISSED); } prepareArguments(); } private void prepareArguments() { Bundle bundle = getArguments(); if (bundle != null) { titleText = bundle.getString(KEY_TITLE); messageText = bundle.getString(KEY_MESSAGE); actionItems = new ArrayList<>(); ArrayList<String> items = bundle.getStringArrayList(KEY_ITEMS); if (items != null) { for (String item : items) { String[] splited = item.split(SEPARATOR); if (splited.length == 2) { actionItems.add(Pair.create(splited[0], splited[1])); } } } } } @Nullable @Override public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { InputMethodManager imm = (InputMethodManager) getActivity().getSystemService(Context.INPUT_METHOD_SERVICE); if (imm.isActive()) { View focusView = getActivity().getCurrentFocus(); if (focusView != null) { imm.hideSoftInputFromWindow(focusView.getWindowToken(), 0); } } actionSheetView = createRoot(); decor = (ViewGroup) getActivity().getWindow().getDecorView(); attachItems(); decor.addView(actionSheetView); backgroundLayer.startAnimation(createAlphaInAnimation()); sheetContainer.startAnimation(createTranslationInAnimation()); return super.onCreateView(inflater, container, savedInstanceState); } private View createRoot() { FrameLayout parent = new FrameLayout(getActivity()); parent.setLayoutParams(new FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT)); backgroundLayer = new View(getActivity()); backgroundLayer.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT)); backgroundLayer.setBackgroundColor(Color.argb(136, 0, 0, 0)); backgroundLayer.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { dismiss(); if (actionListener != null) { actionListener.onCancel(); } } }); sheetContainer = new LinearLayout(getActivity()); FrameLayout.LayoutParams params = new FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT); params.gravity = Gravity.BOTTOM; sheetContainer.setLayoutParams(params); sheetContainer.setOrientation(LinearLayout.VERTICAL); sheetContainer.setPadding(dp2px(8), dp2px(8), dp2px(8), dp2px(8)); parent.setPadding(0, 0, 0, getNavBarHeight(getActivity())); parent.addView(backgroundLayer); parent.addView(sheetContainer); return parent; } private void attachItems() { hasCancelItemAdded = false; ensureTitle(); addItem(); } private void ensureTitle() { if (!TextUtils.isEmpty(titleText) || !TextUtils.isEmpty(messageText)) { LinearLayout titleContainer = new LinearLayout(getActivity()); titleContainer.setOrientation(LinearLayout.VERTICAL); titleContainer.setGravity(Gravity.CENTER); titleContainer.setBackgroundColor(Color.WHITE); titleContainer .setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, dp2px(56))); if (!TextUtils.isEmpty(titleText)) { TextView title = new TextView(getActivity()); title.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT)); title.setTextSize(TypedValue.COMPLEX_UNIT_DIP, 14); title.setText(titleText); title.setGravity(Gravity.CENTER_HORIZONTAL); title.setTextColor(COLOR_TITLE); title.getPaint().setFakeBoldText(true); titleContainer.addView(title); } if (!TextUtils.isEmpty(messageText)) { TextView message = new TextView(getActivity()); message.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT)); message.setTextSize(TypedValue.COMPLEX_UNIT_DIP, 12); message.setGravity(Gravity.CENTER_HORIZONTAL); message.setText(messageText); message.setTextColor(COLOR_TITLE); titleContainer.addView(message); } titleContainer.setClickable(true); titleContainer.setFocusableInTouchMode(true); sheetContainer.addView(titleContainer); sheetContainer.addView(createLine()); } } private void addItem() { for (int i = 0; i < actionItems.size(); i++) { View item = makeItem(actionItems.get(i), i); if (item != null) { sheetContainer.addView(item); sheetContainer.addView(createLine()); } } for (int i = 0; i < actionItems.size(); i++) { Pair<String, String> item = actionItems.get(i); if ("1".equals(item.first)) { if (hasCancelItemAdded) { if (actionListener != null) { actionListener.onError("Can only add most 1 item with type 1"); } return; } TextView textView = createItemBase(); textView.setText(item.second); textView.setTextColor(COLOR_ITEM_NORMAL); textView.getPaint().setFakeBoldText(true); LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, dp2px(48)); lp.topMargin = dp2px(8); textView.setLayoutParams(lp); textView.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if (actionListener != null) { actionListener.onCancel(); dismiss(); } } }); sheetContainer.addView(textView); hasCancelItemAdded = true; } } } private TextView createItemBase() { TextView textView = new TextView(getActivity()); textView.setBackgroundColor(Color.WHITE); textView.setGravity(Gravity.CENTER); textView.setTextSize(TypedValue.COMPLEX_UNIT_PX, dp2px(18)); return textView; } private View makeItem(final Pair<String, String> item, final int index) { TextView textView = createItemBase(); textView.setText(item.second); if ("2".equals(item.first)) { textView.setTextColor(COLOR_ITEM_ALERT); } else if ("0".equals(item.first)) { textView.setTextColor(COLOR_ITEM_NORMAL); } else { return null; } textView.setLayoutParams(new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, dp2px(48))); textView.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if (actionListener != null) { actionListener.onSelected(index, item.second); dismiss(); } } }); return textView; } private View createLine() { View line = new View(getActivity()); line.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, 1)); line.setBackgroundColor(COLOR_LINE); return line; } @Override public void onSaveInstanceState(Bundle outState) { super.onSaveInstanceState(outState); outState.putBoolean(KEY_HAS_DISMISSED, hasDismissed); } public int getNavBarHeight(Context context) { int navigationBarHeight = 0; if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { Resources rs = context.getResources(); int id = rs.getIdentifier("navigation_bar_height", "dimen", "android"); if (id > 0 && checkDeviceHasNavigationBar(context)) { navigationBarHeight = rs.getDimensionPixelSize(id); } } return navigationBarHeight; } private boolean checkDeviceHasNavigationBar(Context context) { boolean hasNavigationBar = false; Resources rs = context.getResources(); int id = rs.getIdentifier("config_showNavigationBar", "bool", "android"); if (id > 0) { hasNavigationBar = rs.getBoolean(id); } try { Class systemPropertiesClass = Class.forName("android.os.SystemProperties"); Method m = systemPropertiesClass.getMethod("get", String.class); String navBarOverride = (String) m.invoke(systemPropertiesClass, "qemu.hw.mainkeys"); if ("1".equals(navBarOverride)) { hasNavigationBar = false; } else if ("0".equals(navBarOverride)) { hasNavigationBar = true; } } catch (Exception e) { e.printStackTrace(); } return hasNavigationBar; } public void setActionListener(ActionListener actionListener) { this.actionListener = actionListener; } private Animation createTranslationInAnimation() { int type = TranslateAnimation.RELATIVE_TO_SELF; TranslateAnimation an = new TranslateAnimation(type, 0, type, 0, type, 1, type, 0); an.setDuration(TRANSLATE_DURATION); return an; } private Animation createAlphaInAnimation() { AlphaAnimation an = new AlphaAnimation(0, 1); an.setDuration(ALPHA_DURATION); return an; } private Animation createTranslationOutAnimation() { int type = TranslateAnimation.RELATIVE_TO_SELF; TranslateAnimation an = new TranslateAnimation(type, 0, type, 0, type, 0, type, 1); an.setDuration(TRANSLATE_DURATION); an.setFillAfter(true); return an; } private Animation createAlphaOutAnimation() { AlphaAnimation an = new AlphaAnimation(1, 0); an.setDuration(ALPHA_DURATION); an.setFillAfter(true); return an; } private int dp2px(int dp) { return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dp, getActivity().getResources().getDisplayMetrics()); } @Override public void onDestroyView() { sheetContainer.startAnimation(createTranslationOutAnimation()); backgroundLayer.startAnimation(createAlphaOutAnimation()); actionSheetView.postDelayed(new Runnable() { @Override public void run() { decor.removeView(actionSheetView); } }, ALPHA_DURATION); super.onDestroyView(); } public static class Builder { private Activity context; private FragmentManager fragmentManager; private String title; private String message; private List<Map<String, Object>> items; private ActionListener listener; Builder(FragmentActivity context) { this.context = context; this.fragmentManager = context.getSupportFragmentManager(); } public Builder setTitle(String title) { this.title = title; return this; } public Builder setMessage(String message) { this.message = message; return this; } public Builder setListener(ActionListener listener) { this.listener = listener; return this; } public Builder setItems(List<Map<String, Object>> items) { this.items = items; return this; } private Bundle parseToBundle() { Bundle bundle = new Bundle(); bundle.putString(KEY_TITLE, title); bundle.putString(KEY_MESSAGE, message); ArrayList<String> itemsBundle = new ArrayList<>(); for (Map<String, Object> map : items) { String type = String.valueOf(map.get("type")); String message = String.valueOf(map.get("message")); if (TextUtils.isEmpty(type)) { type = "0"; } if (message == null) { message = ""; } itemsBundle.add(type + SEPARATOR + message); } bundle.putStringArrayList(KEY_ITEMS, itemsBundle); return bundle; } public WXActionSheet buildAndShow() { WXActionSheet actionSheet = (WXActionSheet) Fragment.instantiate(context, WXActionSheet.class.getName(), parseToBundle()); actionSheet.setActionListener(listener); actionSheet.display(fragmentManager, "WXActionSheet"); return actionSheet; } } public static Builder createBuilder(FragmentActivity context) { return new Builder(context); } public interface ActionListener { void onSelected(int index, String content); void onCancel(); void onError(String message); } }