How to mix WebView with native pages? What are the points to note?

Mixing WebView with native pages is a common requirement. Implementation methods and points to note are as follows:

1. Mixed usage scenarios:

   • Native page embeds WebView to display H5 content
   • WebView embeds native components (such as navigation bar, bottom tab)
   • Native page and WebView page jump to each other
   • Native components and WebView components coexist on the same page

2. Implementation methods:

   Native page embeds WebView:

   • Use ViewPager or Fragment to switch
   • Use CoordinatorLayout to achieve linkage effects
   • Use NestedScrollView to achieve nested scrolling

   WebView embeds native components:

   • Use FrameLayout as container
   • Control native component display through JavaScript
   • Use WebViewClient callback to control native components

   Page navigation:

   • Native to WebView: Use Intent or navigation components
   • WebView to native: Through JavaScriptInterface or URL Scheme
   • Handle back key and navigation stack

3. Data passing:

   • Native to WebView: Through loadUrl parameters or JavaScriptInterface
   • WebView to Native: Through JavaScriptInterface or URL Scheme
   • Use SharedPreferences or local database to share data
   • Use EventBus or LiveData to implement event communication

4. Style unification:

   • Unify design specifications such as colors, fonts, spacing
   • Use the same image resources and icons
   • Keep interaction methods consistent
   • Unify animation effects

5. Performance optimization:

   • Reasonably use WebView pool
   • Avoid frequent creation and destruction of WebView
   • Preload WebView pages
   • Implement page caching

6. User experience optimization:

   • Keep navigation bar and status bar consistent
   • Unify loading animations and error prompts
   • Handle page switching animations
   • Keep gesture operations consistent

7. Points to note:

   • Handle memory leaks
   • Handle lifecycle synchronization between WebView and native pages
   • Handle back key logic
   • Handle focus and input method
   • Handle permission requests

8. Best practices:

   • Formulate clear architecture design
   • Establish unified communication protocols
   • Implement comprehensive error handling
   • Write detailed documentation and examples