Most commonly, a contract is written and signed by the parties. However, there are several other types of contracts that are considered enforceable. There are even some that are not considered enforceable and serve only as a way for a court to determine the obligation on the part of either party.
A SeekBar which supports compatible features on older version of the platform. A SeekBar is an extension of ProgressBar that adds a draggable thumb. The user can touch the thumb and drag left or right to set the current progress level or use the arrow keys. Placing focusable widgets to the left or right of a SeekBar is discouraged. Clients of the SeekBar can attach a SeekBar.OnSeekBarChangeListener to be notified of the user's actions.
The half-ounce unit plugs in to any micro USB slot or iPhone Lightning connector. Seek claims its sensor is sensitive to thermal signatures in the 7- to 13-micron range, and that it can differentiate temperatures from minus 40 C to 330 C (minus 40 F to 626 F).