Android高级进阶：专业指南与实用技巧

Android

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《Android高级进阶指南》是一本专为专业人士设计的非官方免费教程，旨在深化理解并提升Android开发技能。该书籍涵盖了超过1000页的专业技巧，适合那些希望在Android领域深入探索的开发者。书中内容丰富，从入门到进阶，包括了多个核心主题。第1章介绍了Android开发的基础入门，分为以下几个部分： 1.1 创建新项目：这一节指导读者如何在Android Studio中建立新的项目，从项目结构到配置设置，确保开发环境的正确搭建。 1.2 Android Studio设置：讲解了如何高效使用Android Studio这款集成开发环境（IDE），包括工具的配置、版本管理以及代码编辑的最佳实践。 1.3 Android编程不依赖IDE：对于那些想要掌握命令行或离线开发的开发者，这部分提供了相关技巧和步骤。 1.4 应用基础知识：涵盖应用程序的基本构建模块，如Activity、Service、BroadcastReceiver和ContentProvider，以及它们在实际应用中的作用。 1.5 Android虚拟设备（AVD）设置：AVD是模拟器，用于测试不同设备环境，这部分介绍如何创建和管理AVD以优化测试过程。第二章主要聚焦于布局管理，这是UI设计的关键部分： 2.1 LayoutParams：解释布局参数的重要性，帮助开发者理解和使用它们来控制视图在屏幕上的位置和大小。 2.2 Gravity和layout_gravity：详细阐述布局元素的对齐方式，以及如何通过Gravity属性实现灵活的屏幕布局。 2.3 CoordinatorLayoutScrollingBehavior：重点讲解了CoordinatorLayout的滚动行为，它如何协调视图之间的交互和动画效果。 2.4 PercentLayouts：介绍百分比布局，一种响应式布局方式，适用于不同屏幕尺寸的适配。 2.5 ViewWeight：讲解如何使用权重分配，让子视图在容器内按比例占据空间。 2.6 LinearLayout的编程实现：通过代码实例演示LinearLayout的创建和自定义。 2.7 LinearLayout布局详解：深入解析LinearLayout的工作原理和常见应用场景。 2.8 RelativeLayout布局：讨论相对布局的优点，以及如何通过相对布局关系精确控制视图的位置。 2.9 FrameLayout：讲解FrameLayout的堆叠特性，适合显示单一背景和覆盖其他视图的场景。 2.10 GridLayout：介绍网格布局，适用于整齐排列视图的情况。 2.11 CoordinateLayout的高级应用：这部分可能包含了一些更复杂或者特定场景下的CoordinatingLayout使用案例和最佳实践。《Android高级进阶》这本书将帮助读者深入理解Android平台的底层机制，掌握高级布局技术，以及如何优化应用的性能和用户体验。无论是初学者还是经验丰富的开发者，都能从中获益匪浅。

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Section 98.4: Multiple domains and multiple paths 682 ...............................................................................................

Section 98.5: Both http and https for the same domain 683 .......................................................................................

Section 98.6: Using pathPreﬁx 683 .................................................................................................................................

Chapter 99: Canvas drawing using SurfaceView 684 .....................................................................................

Section 99.1: SurfaceView with drawing thread 684 .....................................................................................................

Chapter 100: Firebase 689 ............................................................................................................................................

Section 100.1: Add Firebase to Your Android Project 689 .............................................................................................

Section 100.2: Updating a Firebase users's email 690 ..................................................................................................

Section 100.3: Create a Firebase user 691 .....................................................................................................................

Section 100.4: Change Password 692 .............................................................................................................................

Section 100.5: Firebase Cloud Messaging 693 ...............................................................................................................

Section 100.6: Firebase Storage Operations 695 ..........................................................................................................

Section 100.7: Firebase Realtime Database: how to set/get data 701 .......................................................................

Section 100.8: Demo of FCM based notiﬁcations 702 ...................................................................................................

Section 100.9: Sign In Firebase user with email and password 712 ............................................................................

Section 100.10: Send Firebase password reset email 713 ............................................................................................

Section 100.11: Re-Authenticate Firebase user 715 .......................................................................................................

Section 100.12: Firebase Sign Out 716 ............................................................................................................................

Chapter 101: Crash Reporting Tools 717 ................................................................................................................

Section 101.1: Fabric - Crashlytics 717 .............................................................................................................................

Section 101.2: Capture crashes using Sherlock 721 .......................................................................................................

Section 101.3: Force a Test Crash With Fabric 722 ........................................................................................................

Section 101.4: Crash Reporting with ACRA 723 ..............................................................................................................

Chapter 102: Check Internet Connectivity 725 ...................................................................................................

Section 102.1: Check if device has internet connectivity 725 ........................................................................................

Section 102.2: How to check network strength in android? 725 ..................................................................................

Section 102.3: How to check network strength 726 ......................................................................................................

Chapter 103: Facebook SDK for Android 729 ......................................................................................................

Section 103.1: How to add Facebook Login in Android 729 ..........................................................................................

Section 103.2: Create your own custom button for Facebook login 731 ....................................................................

Section 103.3: A minimalistic guide to Facebook login/signup implementation 732 ................................................

Section 103.4: Setting permissions to access data from the Facebook proﬁle 733 ..................................................

Section 103.5: Logging out of Facebook 733 .................................................................................................................

Chapter 104: Unzip File in Android 734 ...................................................................................................................

Section 104.1: Unzip ﬁle 734 .............................................................................................................................................

Chapter 105: Android Places API 735 .......................................................................................................................

Section 105.1: Getting Current Places by Using Places API 735 ...................................................................................

Section 105.2: Place Autocomplete Integration 736 .....................................................................................................

Section 105.3: Place Picker Usage Example 737 ...........................................................................................................

Section 105.4: Setting place type ﬁlters for PlaceAutocomplete 738 ..........................................................................

Section 105.5: Adding more than one google auto complete activity 739 .................................................................

Chapter 106: Creating your own libraries for Android applications 741 ..............................................

Section 106.1: Create a library available on Jitpack.io 741 ..........................................................................................

Section 106.2: Creating library project 741 ....................................................................................................................

Section 106.3: Using library in project as a module 742 ...............................................................................................

Chapter 107: Gson 743 ....................................................................................................................................................

Section 107.1: Parsing JSON with Gson 743 ...................................................................................................................

Section 107.2: Adding a custom Converter to Gson 745 ..............................................................................................

Section 107.3: Parsing a List<String> with Gson 745 .....................................................................................................

Section 107.4: Adding Gson to your project 746 ............................................................................................................

Section 107.5: Parsing JSON to Generic Class Object with Gson 746 .........................................................................

Section 107.6: Using Gson with inheritance 747 .............................................................................................................

Section 107.7: Parsing JSON property to enum with Gson 749 ...................................................................................

Section 107.8: Using Gson to load a JSON ﬁle from disk 749 ......................................................................................

Section 107.9: Using Gson as serializer with Retroﬁt 749 .............................................................................................

Section 107.10: Parsing json array to generic class using Gson 750 ...........................................................................

Section 107.11: Custom JSON Deserializer using Gson 751 ...........................................................................................

Section 107.12: JSON Serialization/Deserialization with AutoValue and Gson 752 ...................................................

Chapter 108: Device Display Metrics 754 ...............................................................................................................

Section 108.1: Get the screens pixel dimensions 754 .....................................................................................................

Section 108.2: Get screen density 754 ............................................................................................................................

Section 108.3: Formula px to dp, dp to px conversation 754 .......................................................................................

Chapter 109: TextView 755 ............................................................................................................................................

Section 109.1: Spannable TextView 755 ..........................................................................................................................

Section 109.2: Strikethrough TextView 756 ....................................................................................................................

Section 109.3: TextView with image 757 .........................................................................................................................

Section 109.4: Make RelativeSizeSpan align to top 757 ...............................................................................................

Section 109.5: Pinchzoom on TextView 759 ...................................................................................................................

Section 109.6: Textview with dierent Textsize 760 ......................................................................................................

Section 109.7: Theme and Style customization 760 ......................................................................................................

Section 109.8: TextView customization 762 ...................................................................................................................

Section 109.9: Single TextView with two dierent colors 765 ......................................................................................

Chapter 110: ListView 767 ..............................................................................................................................................

Section 110.1: Custom ArrayAdapter 767 ........................................................................................................................

Section 110.2: A basic ListView with an ArrayAdapter 768 ...........................................................................................

Section 110.3: Filtering with CursorAdapter 768 .............................................................................................................

Chapter 111: Building Backwards Compatible Apps 770 .................................................................................

Section 111.1: How to handle deprecated API 770 ..........................................................................................................

Chapter 112: Loader 772 .................................................................................................................................................

Section 112.1: Basic AsyncTaskLoader 772 .....................................................................................................................

Section 112.2: AsyncTaskLoader with cache 773 ...........................................................................................................

Section 112.3: Reloading 774 ............................................................................................................................................

Section 112.4: Pass parameters using a Bundle 775 .....................................................................................................

Chapter 113: ProGuard - Obfuscating and Shrinking your code 776 .......................................................

Section 113.1: Rules for some of the widely used Libraries 776 ....................................................................................

Section 113.2: Remove trace logging (and other) statements at build time 778 .......................................................

Section 113.3: Protecting your code from hackers 778 .................................................................................................

Section 113.4: Enable ProGuard for your build 779 ........................................................................................................

Section 113.5: Enabling ProGuard with a custom obfuscation conﬁguration ﬁle 779 ................................................

Chapter 114: Detect Shake Event in Android 781 ..............................................................................................

Section 114.1: Shake Detector in Android Example 781 .................................................................................................

Section 114.2: Using Seismic shake detection 782 .........................................................................................................

Chapter 115: Typedef Annotations: @IntDef, @StringDef 783 ...................................................................

Section 115.1: IntDef Annotations 783 ..............................................................................................................................

Section 115.2: Combining constants with ﬂags 783 .......................................................................................................

Chapter 116: Capturing Screenshots 785 ...............................................................................................................

Section 116.1: Taking a screenshot of a particular view 785 .........................................................................................

Section 116.2: Capturing Screenshot via Android Studio 785 .......................................................................................

Section 116.3: Capturing Screenshot via ADB and saving directly in your PC 786 .....................................................

Section 116.4: Capturing Screenshot via Android Device Monitor 786 ........................................................................

Section 116.5: Capturing Screenshot via ADB 787 .........................................................................................................

Chapter 117: MVP Architecture 788 ...........................................................................................................................

Section 117.1: Login example in the Model View Presenter (MVP) pattern 788 ..........................................................

Section 117.2: Simple Login Example in MVP 791 ..........................................................................................................

Chapter 118: Orientation Changes 798 ....................................................................................................................

Section 118.1: Saving and Restoring Activity State 798 .................................................................................................

Section 118.2: Retaining Fragments 798 .........................................................................................................................

Section 118.3: Manually Managing Conﬁguration Changes 799 ..................................................................................

Section 118.4: Handling AsyncTask 800 ..........................................................................................................................

Section 118.5: Lock Screen's rotation programmatically 801 .......................................................................................

Section 118.6: Saving and Restoring Fragment State 802 ............................................................................................

Chapter 119: Xposed 804 ................................................................................................................................................

Section 119.1: Creating a Xposed Module 804 ................................................................................................................

Section 119.2: Hooking a method 804 .............................................................................................................................

Chapter 120: Security 806 ..............................................................................................................................................

Section 120.1: Verifying App Signature - Tamper Detection 806 .................................................................................

Chapter 121: PackageManager 807 ..........................................................................................................................

Section 121.1: Retrieve application version 807 ..............................................................................................................

Section 121.2: Version name and version code 807 ......................................................................................................

Section 121.3: Install time and update time 807 .............................................................................................................

Section 121.4: Utility method using PackageManager 808 ...........................................................................................

Chapter 122: ImageView 810 ........................................................................................................................................

Section 122.1: Set tint 810 .................................................................................................................................................

Section 122.2: Set alpha 811 ............................................................................................................................................

Section 122.3: Set Scale Type 811 ...................................................................................................................................

Section 122.4: ImageView ScaleType - Center 816 .......................................................................................................

Section 122.5: ImageView ScaleType - CenterCrop 818 ...............................................................................................

Section 122.6: ImageView ScaleType - CenterInside 820 .............................................................................................

Section 122.7: ImageView ScaleType - FitStart and FitEnd 822 ..................................................................................

Section 122.8: ImageView ScaleType - FitCenter 826 ...................................................................................................

Section 122.9: Set Image Resource 828 ..........................................................................................................................

Section 122.10: ImageView ScaleType - FitXy 829 ........................................................................................................

Section 122.11: MLRoundedImageView.java 831 ............................................................................................................

Chapter 123: Gesture Detection 834 .........................................................................................................................

Section 123.1: Swipe Detection 834 ..................................................................................................................................

Section 123.2: Basic Gesture Detection 835 ...................................................................................................................

Chapter 124: Doze Mode 837 .......................................................................................................................................

Section 124.1: Whitelisting an Android application programmatically 837 .................................................................

Section 124.2: Exclude app from using doze mode 837 ...............................................................................................

Chapter 125: Android Sound and Media 838 ........................................................................................................

Section 125.1: How to pick image and video for api >19 838 ........................................................................................

Section 125.2: Play sounds via SoundPool 839 ..............................................................................................................

Chapter 126: SearchView 840 ......................................................................................................................................

Section 126.1: Setting Theme for SearchView 840 .........................................................................................................

Section 126.2: SearchView in Toolbar with Fragment 840 ...........................................................................................

Section 126.3: Appcompat SearchView with RxBindings watcher 842 ........................................................................

Chapter 127: Camera and Gallery 845 ....................................................................................................................

Section 127.1: Take photo 845 ..........................................................................................................................................

Section 127.2: Taking full-sized photo from camera 847 .............................................................................................

Section 127.3: Decode bitmap correctly rotated from the uri fetched with the intent 850 .......................................

Section 127.4: Set camera resolution 852 .......................................................................................................................

Section 127.5: How to start camera or gallery and save camera result to storage 852 ..........................................

Chapter 128: Callback URL 856 ...................................................................................................................................

Section 128.1: Callback URL example with Instagram OAuth 856 ...............................................................................

Chapter 129: Twitter APIs 857 ......................................................................................................................................

Section 129.1: Creating login with twitter button and attach a callback to it 857 ......................................................

Chapter 130: Drawables 859 ........................................................................................................................................

Section 130.1: Custom Drawable 859 ..............................................................................................................................

Section 130.2: Tint a drawable 860 .................................................................................................................................

Section 130.3: Circular View 861 ......................................................................................................................................

Section 130.4: Make View with rounded corners 861 ....................................................................................................

Chapter 131: Colors 863 ...................................................................................................................................................

Section 131.1: Color Manipulation 863 ..............................................................................................................................

Chapter 132: ConstraintLayout 864 ..........................................................................................................................

Section 132.1: Adding ConstraintLayout to your project 864 .......................................................................................

Section 132.2: Chains 865 .................................................................................................................................................

Chapter 133: RenderScript 866 ...................................................................................................................................

Section 133.1: Getting Started 866 ...................................................................................................................................

Section 133.2: Blur a View 872 .........................................................................................................................................

Section 133.3: Blur an image 874 ....................................................................................................................................

Chapter 134: Fresco 877 .................................................................................................................................................

Section 134.1: Getting Started with Fresco 877 ..............................................................................................................

Section 134.2: Using OkHttp 3 with Fresco 878 ..............................................................................................................

Section 134.3: JPEG Streaming with Fresco using DraweeController 878 ..................................................................

Chapter 135: Swipe to Refresh 879 ...........................................................................................................................

Section 135.1: How to add Swipe-to-Refresh To your app 879 ....................................................................................

Section 135.2: Swipe To Refresh with RecyclerView 879 ..............................................................................................

Chapter 136: AutoCompleteTextView 881 .............................................................................................................

Section 136.1: AutoComplete with CustomAdapter, ClickListener and Filter 881 .......................................................

Section 136.2: Simple, hard-coded AutoCompleteTextView 884 .................................................................................

Chapter 137: Installing apps with ADB 885 ...........................................................................................................

Section 137.1: Uninstall an app 885 .................................................................................................................................

Section 137.2: Install all apk ﬁle in directory 885 ...........................................................................................................

Section 137.3: Install an app 885 .....................................................................................................................................

Chapter 138: IntentService 886 ...................................................................................................................................

Section 138.1: Creating an IntentService 886 ..................................................................................................................

Section 138.2: Basic IntentService Example 886 ............................................................................................................

Section 138.3: Sample Intent Service 887 .......................................................................................................................

Chapter 139: AdMob 889 .................................................................................................................................................

Section 139.1: Implementing 889 ......................................................................................................................................

Chapter 140: Implicit Intents 891 ...............................................................................................................................

Section 140.1: Implicit and Explicit Intents 891 ...............................................................................................................

Section 140.2: Implicit Intents 891 ...................................................................................................................................

Chapter 141: Publish to Play Store 892 ...................................................................................................................

Section 141.1: Minimal app submission guide 892 ..........................................................................................................

Chapter 142: Firebase Realtime DataBase 894 .................................................................................................

Section 142.1: Quick setup 894 .........................................................................................................................................

Section 142.2: Firebase Realtime DataBase event handler 894 ..................................................................................

Section 142.3: Understanding ﬁrebase JSON database 895 .......................................................................................

Section 142.4: Retrieving data from ﬁrebase 896 .........................................................................................................

Section 142.5: Listening for child updates 897 ...............................................................................................................

Section 142.6: Retrieving data with pagination 898 ......................................................................................................

Section 142.7: Denormalization: Flat Database Structure 899 .....................................................................................

Section 142.8: Designing and understanding how to retrieve realtime data from the Firebase Database

901 .............................................................................................................................................................................

Chapter 143: Image Compression 904 ....................................................................................................................

Section 143.1: How to compress image without size change 904 ................................................................................

Chapter 144: Email Validation 907 ...........................................................................................................................

Section 144.1: Email address validation 907 ...................................................................................................................

Section 144.2: Email Address validation with using Patterns 907 ................................................................................

Chapter 145: Keyboard 908 .........................................................................................................................................

Section 145.1: Register a callback for keyboard open and close 908 .........................................................................

Section 145.2: Hide keyboard when user taps anywhere else on the screen 908 .....................................................

Chapter 146: Button 910 ................................................................................................................................................

Section 146.1: Using the same click event for one or more Views in the XML 910 .....................................................

Section 146.2: Deﬁning external Listener 910 ................................................................................................................

Section 146.3: inline onClickListener 911 .........................................................................................................................

Section 146.4: Customizing Button style 911 ..................................................................................................................

Section 146.5: Custom Click Listener to prevent multiple fast clicks 915 ....................................................................

Section 146.6: Using the layout to deﬁne a click action 915 ........................................................................................

Section 146.7: Listening to the long click events 916 .....................................................................................................

Chapter 147: TextInputLayout 917 ...........................................................................................................................

Section 147.1: Basic usage 917 .........................................................................................................................................

Section 147.2: Password Visibility Toggles 917 ..............................................................................................................

Section 147.3: Adding Character Counting 917 .............................................................................................................

Section 147.4: Handling Errors 918 .................................................................................................................................

Section 147.5: Customizing the appearance of the TextInputLayout 918 ..................................................................

Section 147.6: TextInputEditText 919 ..............................................................................................................................

Chapter 148: Bottom Sheets 921 ...............................................................................................................................

Section 148.1: Quick Setup 921 ........................................................................................................................................

Section 148.2: BottomSheetBehavior like Google maps 921 .......................................................................................

Section 148.3: Modal bottom sheets with BottomSheetDialog 928 .............................................................................

Section 148.4: Modal bottom sheets with BottomSheetDialogFragment 928 ............................................................

Section 148.5: Persistent Bottom Sheets 928 .................................................................................................................

Section 148.6: Open BottomSheet DialogFragment in Expanded mode by default 929 ..........................................

Chapter 149: CoordinatorLayout and Behaviors 931 .....................................................................................

Section 149.1: Creating a simple Behavior 931 ..............................................................................................................

Section 149.2: Using the SwipeDismissBehavior 932 .....................................................................................................

Section 149.3: Create dependencies between Views 932 .............................................................................................

Chapter 150: EditText 934 .............................................................................................................................................

Section 150.1: Working with EditTexts 934 ......................................................................................................................

Section 150.2: Customizing the InputType 936 ..............................................................................................................

Section 150.3: Icon or button inside Custom Edit Text and its action and click listeners 936 ...................................

Section 150.4: Hiding SoftKeyboard 938 ........................................................................................................................