cea7dbebb8
1. Fix some typos. 2. Some links are out-of-date. Bug: 775198 Change-Id: I11d56530427d61c727ece0c8632d40b7e8faca9f Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2163627 Auto-Submit: Lijin Shen <lazzzis@google.com> Reviewed-by: Theresa <twellington@chromium.org> Commit-Queue: Theresa <twellington@chromium.org> Cr-Commit-Position: refs/heads/master@{#762072}
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Chrome for Android UI
Ramping-up
Android has a number of developer guides that are helpful for getting ramped up on general Android development. We recommend reading the following as primers for developing UI:
Colors and text styles
Chrome for Android has a color palette defined in //ui/android/java/res/values/color_palette.xml and a set of reusable semantic colors defined in //ui/android/java/res/values/semantic_colors_adaptive.xml. The semantic colors from semantc_colors_adaptive.xml should be used to ensure colors adapt properly for dark mode and can be consistently and easily updated during product-wide visual refreshes.
For more information on selecting the right color, see Night Mode on Chrome Android.
Text should be styled with a pre-defined text appearance from //ui/android/java/res/values-v17/styles.xml. If leading (aka line height) is needed, use org.chromium.ui.widget.TextViewWithLeading with app:leading set to one of the pre-defined *_leading dimensions in //ui/android/java/res/values/dimens.xml.
Widgets
The Chromium code base contains a number of wrappers around Android classes (to smooth over bugs or save on binary size) and many UI widgets that provide Chrome-specific behavior and/or styling.
These can be found in //components/browser_ui/widget/android/, //ui/android/, and //chrome/android/java/src/org/chromium/chrome/browser/widget/. There is an ongoing effort to consolidate all widgets in //components/browser_ui/widget/android.
MVC
UI development should follow a modified Model-View-Controller pattern. MVC base classes live in //ui/android/java/src/org/chromium/ui/modelutil.
The following guides introduce MVC in Chrome for Android: