react-native/Examples/UIExplorer/js/SnapshotExample.js

80 lines
2.1 KiB
JavaScript

/**
* Copyright (c) 2013-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*
* The examples provided by Facebook are for non-commercial testing and
* evaluation purposes only.
*
* Facebook reserves all rights not expressly granted.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON INFRINGEMENT. IN NO EVENT SHALL
* FACEBOOK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* @flow
*/
'use strict';
var React = require('react');
var ReactNative = require('react-native');
var {
Image,
StyleSheet,
Text,
UIManager,
View,
} = ReactNative;
class ScreenshotExample extends React.Component {
state = {
uri: undefined,
};
render() {
return (
<View>
<Text onPress={this.takeScreenshot} style={style.button}>
Click to take a screenshot
</Text>
<Image style={style.image} source={{uri: this.state.uri}}/>
</View>
);
}
takeScreenshot = () => {
UIManager
.takeSnapshot('window', {format: 'jpeg', quality: 0.8}) // See UIManager.js for options
.then((uri) => this.setState({uri}))
.catch((error) => alert(error));
};
}
var style = StyleSheet.create({
button: {
marginBottom: 10,
fontWeight: '500',
},
image: {
flex: 1,
height: 300,
resizeMode: 'contain',
backgroundColor: 'black',
},
});
exports.title = 'Snapshot / Screenshot';
exports.description = 'API to capture images from the screen.';
exports.examples = [
{
title: 'Take screenshot',
render(): React.Element<any> { return <ScreenshotExample />; }
},
];