react-native/RNTester/js/SnapshotExample.js

65 lines
1.5 KiB
JavaScript

/**
* Copyright (c) 2015-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.
*
* @flow
* @providesModule SnapshotExample
* @format
*/
'use strict';
const React = require('react');
const ReactNative = require('react-native');
const {Alert, Image, StyleSheet, Text, View} = ReactNative;
class ScreenshotExample extends React.Component<{}, $FlowFixMeState> {
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 = () => {
ReactNative.takeSnapshot('window', {format: 'jpeg', quality: 0.8}) // See UIManager.js for options
.then(uri => this.setState({uri}))
.catch(error => Alert.alert(error));
};
}
const 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 />;
},
},
];