Mobile Interaction Design Example: Touch screen mobile phone input interactive design

Article Description: Interactive design of touch screen input.

Touch screen phone input will draw a virtual keyboard in the interface, for input characters, can be used in all applications. Especially in text messages and mailboxes, such as the need for frequent input text, the input speed directly affect the user's operating efficiency.

Disadvantages

But the same keyboard input, the touch screen is not a physical key to the high efficiency, because:

1. Input method needs to locate the position of the finger, such as the hands of a computer keyboard, the left hand index finger positioned in the F key, the right middle finger positioned in the J key, and touch screen can not be like the button convex or input sense positioning, it is difficult to form efficient blind hit.

2. Touch screen itself click No physical button precision, touch screen click the target area did not really click to the target area, biased towards the center of the target below. Whether it is one hand and two hands input, the touch screen itself is a high probability of false clicks. In a key-intensive area like a virtual keyboard, the clickable region of each key is limited and the probability of a false click is higher.

3. When clicked, there is no clear tactile feedback, as the finger clicks on the button and the iphone button is clicked to magnify the visual feedback.

4. The finger moves a large range, the key mobile phone input when the finger is limited to the key, and touch-screen input and switch the input box when the finger also in the non-virtual key area and key area switch. When you enter Chinese, it is not like English to click the button immediately after the characters on the screen, will show the pinyin string to select the required characters again on the screen, the finger needs to click on the alternative words.

5. The touch screen does not have the combination key, the input number and the symbol need to switch the panel.

6. Mobile input cursor needs accurate Click or with the help of a magnifying glass, physical keys can directly use the arrow keys to switch the cursor, for the modification of the wrong character operation caused inconvenience.

Chinese input

The general touch screen Chinese Pinyin input process can be divided into the following steps:

1. Input letters, keyboard to provide letter input suggestions. For example, input initials W, you can combine the vowel "a, u" and other highlighting, but this is only effective, for simple spelling meaningless. Simple spelling input only the first code of pinyin, in the input phrase reasonable use of simple spell can greatly improve the input speed, the disadvantage is easy to appear coincident.

2. Letters have been entered into the letter string, intelligent word-cutting and display candidate words. A single candidate is based on the matching of words in the alphabet, and the probability of the combination of Chinese characters is needed to calculate the phrase and long sentences. Users in the use of input method is also training constantly updated process, the longer the use of the thesaurus, the more consistent with the personal input habits. The ways to update the Thesaurus are:

A the sequential adjustment of a single letter or a full spell match candidate words. For example, enter "Hao", the first candidate word "good" is more likely to be selected, but the user select "Number" multiple times, then "number" may be adjusted to the first candidate. The initialization thesaurus may be extracted from dictionaries, common passages, articles and network terms, and the probability of candidate words, Chinese characters and associative words can be computed from the thesaurus, and the more complex long sentence input needs to analyze Chinese language habits.

b The user can adjust the probability of the word candidate in the thesaurus, but also can customize the phrase, the word is not linked to establish a correlation, commonly known as the creation of words. For example, the input "Nima", the user manually input "ni", the next time you enter the same letter will become a candidate word. Computer-side computing more intelligent, two times to enter the "Nepal" and "Ma", may be based on the input of the order of the composition of the phrase.

c the "metabolism" of the original default thesaurus by the network and group users. If most users enter the "NI" probability beyond a certain probability and become a popular word, you can update the vocabulary to all users of the thesaurus. When several sources of thesaurus produce updates, they also affect the thesaurus, such as the popular events on the web, "Guo Meimei."

3. Intelligent error correction in Chinese can appropriately mitigate the efficiency problems caused by false clicks. Long sentence input, such as the discovery of the letter string of individual input errors, can not be used as the computer side of the use of directional key fine-tuning, can only delete the whole paragraph. Intelligent error Correction is the cubby of letters and words that have been entered with a suspected error, and the correct input results are returned after the operation, which can be used to make corrections to the common anti-letter, the missing letter and the wrong letter. This is very helpful for fast blind, which can be added to the clickable area of the letter in disguise, such as "Haohaizi", and when you continue to enter "Uexi", the 6th letter will change from I to O. Without error correction, the phrase or long sentence will only be matched according to the letter you have entered. After error correction, you can follow a number of letters to match, if you want to enter I, then only need to click "U, I, O" one, a button of the clickable area into three buttons.

In the input process, deliberately input the wrong part of the letter, Baidu Mobile Input method will correct the letter string has been entered, Sogou cell phone input method to keep the wrong alphabet string.

4. Sino-British mixed transmission and input digital punctuation, the switchboard will interrupt the input process, such as in the Chinese state needs to enter the mailbox, because @ and. need to switch Input Panel, currently only on the number of the use of the word input. Because a single frequently-found character switchboard is a very inefficient operation, especially when the panel's switching inlet and export are inconsistent.

Development trend

Touch-screen interaction has become a trend, the use of touch screen features and optimization procedures can be appropriate to compensate for defects, touch-screen interaction is more abundant than the key, even in a specific case of touch-screen input more convenient.

Input bank accounts, mailboxes, address bars and data tables and other special categories of character segments, the virtual keyboard can change the Input method layout or switch panel, easy for users to enter quickly. For example, when entering account mailboxes, the virtual keyboard can display @ and. When you encounter a continuous input box, the button in the lower-right corner changes to "next", which is equivalent to the TAB key of your computer's keyboard for fast switching to the next input box.

The use of mobile phone-side editing characters can provide a useful command for the virtual keyboard, which usually appears above the virtual keyboard, is not controlled by input method, and is an application custom command and appears or disappears at the same time.