How to contribute

Simply fork and clone this repo, and download Android Studio to start coding!

When you have made a satisfactory change (and tested it!), submit a pull request.

Style guidelines

Following these style guidelines will increase the chance that your pull request will be accepted!

General

Remove trailing whitespace
Tab indentation
Avoid/break lines longer than 100 characters

Java

Use camelCasing in Java files, including naming
Use an empty line between methods
Use spaces between operands
Use a space—not a newline—before {
Prefix class variables with m
Tag overridden methods with @Override
Keep overridden methods at the top of the file

Resource files

Use underscores in xml and res files, including naming
Order views in the order that they would appear on a device from top to bottom, left to right
Order layout properties as follows: id, layout_width, layout_height, other layout_ properties, other properties
Write a good commit message!

Coding guidelines

Implement Parcelable rather than Serializable
Use fragments
Simplify the view hierarchy in layouts whenever possible
- Prefer RelativeLayout over nesting layouts (avoid nesting in most situations)
- Use a FrameLayout if possible to reduce overhead
- Remove unnecessary top-level layouts
When calling Log, use a class variable as a tag, e.g. private static final String TAG
- Preferred Log.d call style: Log.d(TAG, "Text");
- Preferred Log.e call style: Log.e(TAG, "Error text", new Error());

Recommended

Optimize imports frequently (Code -> Optimize Imports)
Inspect code occasionally (Analyze -> Inspect Code)

Anything not mentioned here? Just take a look at the source code. Based on thoughtbot's contributing.md and style guide.