plateaukao

Isolate isolate;

void startRealAsyncTask() async {
  // need a ReceivePort to receive messages.
  ReceivePort receivePort= ReceivePort(); 
  isolate = await Isolate.spawn(heavyTask, receivePort.sendPort);
  receivePort.listen((data) {
    stdout.write('RECEIVE: ' + data + ', ');
  });
}

plateaukao

  Future<Uint8List> _downloadImage() async {
    String dir = (await getApplicationDocumentsDirectory()).path;
    File file = new File('$dir/$_filename');

    if (file.existsSync()) {
      var image = await file.readAsBytes();
      return image;
    } else {
      var response = await http.get(_url,);
      var bytes = response.bodyBytes;

plateaukao

  Future<dynamic> downloadImage() async {
    String dir = (await getApplicationDocumentsDirectory()).path;
    File file = new File('$dir/$filename');

    if (file.existsSync()) {
      print('file already exist');
      var image = await file.readAsBytes();
      return image;
    } else {
      print('file not found downloading from server');

plateaukao

import 'dart:io' as Io;
import 'package:image/image.dart';
void main() {
  // Read an image from file (webp in this case).
  // decodeImage will identify the format of the image and use the appropriate
  // decoder.
  Image image = decodeImage(new Io.File('test.webp').readAsBytesSync());

  // Resize the image to a 120x? thumbnail (maintaining the aspect ratio).
  Image thumbnail = copyResize(image, 120);

plateaukao

package com.linecorp.linesdk.dialog.internal;


import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.support.annotation.Nullable;
import android.support.v4.graphics.drawable.RoundedBitmapDrawable;
import android.support.v4.graphics.drawable.RoundedBitmapDrawableFactory;

plateaukao

python main.py  original_string_key new_string_key

plateaukao

1. 進入一個 Activity

onStart
onResume

2. 進入 Multi-window 模式

onPause
onStop
onStart

plateaukao

 export interface IPointGroup {
+  maxWidth: number;
   color: string;
   points: IBasicPoint[];
 }
@@ -230,6 +231,7 @@ export default class SignaturePad {
   private _strokeBegin(event: MouseEvent | Touch): void {
     const newPointGroup = {
       color: this.penColor,
+      maxWidth: this.maxWidth,

plateaukao

 export interface IPointGroup {
   color: string;
   points: IBasicPoint[];
 }

plateaukao

document.getElementById('undo').addEventListener('click', function () {
	var data = signaturePad.toData();
  if (data) {
    data.pop(); // remove the last dot or line
    signaturePad.fromData(data);
  }
});