react-native/RNTester/js/examples/PermissionsAndroid/PermissionsExample.js

/**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @format
 * @flow
 */

'use strict';

const React = require('react');
const {
  PermissionsAndroid,
  Picker,
  StyleSheet,
  Text,
  TouchableWithoutFeedback,
  View,
} = require('react-native');

const Item = Picker.Item;

class PermissionsExample extends React.Component<{}, $FlowFixMeState> {
  state = {
    permission: PermissionsAndroid.PERMISSIONS.CAMERA,
    hasPermission: 'Not Checked',
  };

  render() {
    return (
      <View style={styles.container}>
        <Text style={styles.text}>Permission Name:</Text>
        <Picker
          style={styles.picker}
          selectedValue={this.state.permission}
          onValueChange={this._onSelectPermission.bind(this)}>
          <Item
            label={PermissionsAndroid.PERMISSIONS.CAMERA}
            value={PermissionsAndroid.PERMISSIONS.CAMERA}
          />
          <Item
            label={PermissionsAndroid.PERMISSIONS.READ_CALENDAR}
            value={PermissionsAndroid.PERMISSIONS.READ_CALENDAR}
          />
          <Item
            label={PermissionsAndroid.PERMISSIONS.ACCESS_FINE_LOCATION}
            value={PermissionsAndroid.PERMISSIONS.ACCESS_FINE_LOCATION}
          />
        </Picker>
        <TouchableWithoutFeedback onPress={this._checkPermission}>
          <View>
            <Text style={[styles.touchable, styles.text]}>
              Check Permission
            </Text>
          </View>
        </TouchableWithoutFeedback>
        <Text style={styles.text}>
          Permission Status: {this.state.hasPermission}
        </Text>
        <TouchableWithoutFeedback onPress={this._requestPermission}>
          <View>
            <Text style={[styles.touchable, styles.text]}>
              Request Permission
            </Text>
          </View>
        </TouchableWithoutFeedback>
      </View>
    );
  }

  _onSelectPermission = (permission: string | number) => {
    this.setState({
      permission: permission,
    });
  };

  _checkPermission = async () => {
    let result = await PermissionsAndroid.check(this.state.permission);
    this.setState({
      hasPermission:
        (result ? 'Granted' : 'Revoked') + ' for ' + this.state.permission,
    });
  };

  _requestPermission = async () => {
    let result = await PermissionsAndroid.request(this.state.permission, {
      title: 'Permission Explanation',
      message:
        'The app needs the following permission ' +
        this.state.permission +
        ' because of reasons. Please approve.',
    });

    this.setState({
      hasPermission: result + ' for ' + this.state.permission,
    });
  };
}

exports.displayName = (undefined: ?string);
exports.framework = 'React';
exports.title = 'PermissionsAndroid';
exports.description = 'Permissions example for API 23+.';
exports.examples = [
  {
    title: 'Permissions Example',
    description:
      'Short example of how to use the runtime permissions API introduced in Android M.',
    render: () => <PermissionsExample />,
  },
];

const styles = StyleSheet.create({
  container: {
    flex: 1,
    backgroundColor: 'white',
  },
  text: {
    margin: 10,
  },
  touchable: {
    color: '#007AFF',
  },
  picker: {
    flex: 1,
  },
});