react-native-android-signaturepad

Integrate https://github.com/gcacace/android-signaturepad into react-native/android

Install

npm i react-native-android-signaturepad

Demo

Example: https://github.com/React-Sextant/react-native-android-signaturepad/blob/master/example/RNAndroidSignaturePad.js

ONLY IN Android

import React from 'react'
import {Button,View} from 'react-native'
import SignaturePad from 'react-native-android-signaturepad'

export default class extends React.Component {
    state={
        erasing:false
    };

    clear=()=>{
        this.refs._signaturePad.clear();
    };

    undo=()=>{
        this.refs._signaturePad.undo(callback:options);
    };

    render(){
        return (
            <View style={{flex:1}}>
                <SignaturePad
                    ref={"_signaturePad"}
                    style={{flex:1,backgroundColor:'yellow'}}
                    penMaxWidth={7}
                    penMinWidth={3}
                    undo={true}
                    bitmap={"base64"}
                    erasing={this.state.erasing}
                    onChange={(event)=>{
                        let message = event.nativeEvent.message;
                        console.log(message)
                    }}
                />
                <Button title={"clear"} onPress={this.clear}/>
                <Button title={"undo"} onPress={this.undo}/>
            </View>
        )
    }
}

Usage

https://github.com/gcacace/android-signaturepad

Changelog

• 1.0.4

  1.添加 erasing={boolean}橡皮擦功能

• 2.1.0

  1.添加undo()回退功能

  2.添加undoprops控制回退功能的启用（默认为true，可能会占用一定内存）

• 2.2.1

  1.添加bitmap={string}初始化时会渲染传入的bitmap

• Future

  1.Add BackgroundImage support

其他

使用<Image />渲染bitmap记得添加前缀'data:image/png;base64,'以作为base64格式数据

this.setState({bitmap:await this.refs._signaturePad.getTransparentSignatureBitmap()})

<Image source={{uri:'data:image/png;base64,'+bitmap}}