README.md
1# Vibrator
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3### Introduction
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5This sample simulates the countdown scenario to show the use of the vibrator APIs. Below shows the sample app.
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9### Functions
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11You can trigger a vibrator to vibrate by duration or vibration effect.
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13### Required Permissions
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15ohos.permission.VIBRATE
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17### Usage
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191. Touch the countdown text. A time picker is displayed. Select any time and touch **OK**. The selected time is displayed as the countdown text.
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212. Touch **start**. The countdown starts, and the round progress bar and countdown text start changing. When the countdown ends, the device vibrates, the progress bar returns to the initial state, and a vibration dialog box is displayed.
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233. Touch **reset**. The countdown ends, and the round progress bar and countdown text are restored to the initial state.
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25### Constraints
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271. This sample can only be run on standard-system devices.
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292. This sample requires a device with a vibrator.
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313. This sample requires DevEco Studio 3.1 Canary1 (Build Version: 3.1.0.100) to compile and run.
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