react-native 手机拍照权限

第一步 ：

在 android/app/src/main/AndroidManifest.xml
添加<uses-permission android:name="android.permission.CAMERA"/>

然后运行项目在手机应用权限哪里查看
这是添加前的

这是添加后的

第二步调用
import React, {Component} from 'react';
import {

View,
Text,
Image,
StyleSheet,
Button,
Modal,
TouchableHighlight,
TouchableOpacity,
Dimensions

} from 'react-native';
import ImagePicker from 'react-native-image-picker';

// const Dimensions = require ('Dimensions') ;
export default class Jidan extends Component {

state={
    avatarSource: {},
}
// 选择图片或相册
onClickChoosePicture = () => {
    const options = {
        title: '',
        cancelButtonTitle: '取消',
        takePhotoButtonTitle: '拍照',
        chooseFromLibraryButtonTitle: '选择照片',
        storageOptions: {
            skipBackup: true,
            path: 'images',
        }
    };

    ImagePicker.showImagePicker(options, (response) => {
        console.log('Response = ', response);

        if (response.didCancel) {
            console.log('User cancelled image picker');
        } else if (response.error) {
            console.log('ImagePicker Error: ', response.error);
        } else if (response.customButton) {
            console.log('User tapped custom button: ', response.customButton);
        } else {
            const source = {uri: response.uri};
            this.setState({
                avatarSource: source,
            });
            console.warn(this.state.avatarSource.uri);
        }
    });
}


async requestCarmeraPermission() {
    try {
        const granted = await PermissionsAndroid.request(
            PermissionsAndroid.PERMISSIONS.CAMERA,
            {
                  'title': 'Camera Permission',
                'message': 'the project needs access to your camera ' +
               'so you can take awesome pictures.'
            }
        )
        if (granted === PermissionsAndroid.RESULTS.GRANTED) {
            this.show("你已获取了相机权限")
        } else {
            this.show("获取相机失败")
        }
    } catch (err) {
        this.show(err.toString())
    }
}

 
render() {
    
    return (
        <View style={styles.container}>
            <TouchableOpacity style={styles.button_view}
                onPress={this.requestCarmeraPermission.bind(this)}>
                <Text style={styles.button_text}>申请相机权限</Text>
            </TouchableOpacity>
            <Text style={styles.textStyle}  onPress={() => this.onClickChoosePicture()}>选择图片</Text>
            <Image source={this.state.avatarSource} style={styles.uploadAvatar}/>
        </View>
    );
}

}
const styles = StyleSheet.create({

button_view: {
    margin:4,
    borderRadius: 4,
    backgroundColor: '#8d4dfc',
    alignItems: 'center',
},
button_text: {
    padding: 6,
    fontSize: 16,
    fontWeight: '600'
},
container: {
    flex: 1,
    flexDirection: 'column',
    justifyContent: 'center',
    alignItems: 'center',
    marginBottom:60,
},
textStyle:{
    backgroundColor:'#66CCFF',
    paddingHorizontal:50,
    paddingVertical:10,
},
uploadAvatar:{
    width: 150,
    height: 150,
}

});