my.getScreenBrightness
Get the screen brightness.
Sample Code
copy
<!-- API-DEMO page/API/screen/screen.axml-->
<view class="page">
<view class="page-description">Screen brightness API</view>
<view class="page-section">
<view class="page-section-title">Set whether to keep screen on</view>
<view class="page-section-demo">
<switch checked="{{status}}" onChange="switchKeepScreenOn"/>
</view>
</view>
<view class="page-section">
<view class="page-section-title">Set screen brightness</view>
<view class="page-section-demo">
<slider value="{{brightness}}" max="1" min="0" onChange="sliderChange" step="0.02"/>
</view>
</view>
<view class="page-section">
<view class="page-section-title">Get screen brightness</view>
<view class="page-section-demo">
<button type="primary" onTap="getBrightness">Get screen brightness</button>
</view>
</view>
</view>copy
// API-DEMO page/API/screen/screen.js
Page({
data: {
status: false,
brightness: 1,
},
onLoad() {
my.getScreenBrightness({
success: res => {
this.setData({
brightness: res.brightness
})
},
})
},
sliderChange(e) {
my.setScreenBrightness({
brightness: e.detail.value,
success: (res) => {
this.setData({
brightness: e.detail.value,
})
}
})
},
switchKeepScreenOn(e) {
my.setKeepScreenOn({
keepScreenOn: e.detail.value,
success: (res) => {
this.setData({
status: e.detail.value,
})
}
})
},
getBrightness() {
my.getScreenBrightness({
success: res => {
my.alert({
content: `Current screen brightness: ${res.brightness}`
});
}
})
}
});Parameters
Object type with the following attributes:
Property | Type | Required | Description |
success | Function | No | The callback function upon call success. |
fail | Function | No | The callback function that is called when the JSAPI call fails. When executed, it receives an |
complete | Function | No | The callback function upon call completion (to be executed upon either call success or failure). |
err object
Parameter | Data type | Required | Description |
error | Number | Yes | An error code that represents the specific error encountered. |
errorMessage | String | Yes | An error message that describes the corresponding error code. |
Tips
The brightness value output by Xiaomi phones is not consistent with the actual device brightness, therefore this JSAPI cannot retrieve the correct device brightness.