ViewUtil

package com.gordonlu.viewutil;

import android.app.Activity;

import android.content.Context;

import com.google.appinventor.components.annotations.*;

import com.google.appinventor.components.common.ComponentCategory;

import com.google.appinventor.components.runtime.AndroidNonvisibleComponent;

import com.google.appinventor.components.runtime.ComponentContainer;

import com.google.appinventor.components.runtime.EventDispatcher;

import com.google.appinventor.components.runtime.AndroidViewComponent;

import android.view.View;

import android.graphics.Bitmap;

import java.io.FileOutputStream;

import android.graphics.Bitmap.CompressFormat;

@DesignerComponent(

version = 1,

description = "A non-visible extension to save a component as an image.",

category = ComponentCategory.EXTENSION,

nonVisible = true,

iconName = "https://docs.google.com/drawings/d/e/2PACX-1vQCI87PHLBF0jb8QWyYmIRQSjjNW3EFXf-qpsWCvBYkUQ9vEgPAB8SpxcMpblxNpbIYrjCjLrRLIU2c/pub?w=16&h=16")

@SimpleObject(external = true)

//Libraries

@UsesLibraries(libraries = "")

//Permissions

@UsesPermissions(permissionNames = "")

public class ViewUtil extends AndroidNonvisibleComponent {

//Activity and Context

private Context context;

private Activity activity;

public ViewUtil(ComponentContainer container){

super(container.$form());

this.activity = container.$context();

this.context = container.$context();

}

@SimpleFunction(description = "Saves the component as an image with the given path, compress format and the given quality.")

public void SaveComponentAsImage(AndroidViewComponent component, String path, String compressFormat, int quality) {

// https://stackoverflow.com/a/3527902/17802442

try {

View view = component.getView();

view.setDrawingCacheEnabled(true);

Bitmap b = view.getDrawingCache();

CompressFormat cp = CompressFormat.JPEG;

if (compressFormat == "PNG") {

cp = CompressFormat.PNG;

}

b.compress(cp, quality, new FileOutputStream(path));

Saved(path);

}

catch(Throwable e) {

Failed(e.getMessage());

}

}

@SimpleProperty(description = "A compress format block.")

public String Jpeg() {

return "JPEG";

}

@SimpleProperty(description = "A compress format block.")

public String Png() {

return "PNG";

}

@SimpleEvent(description = "This event is fired when the extension has failed to save the image.")

public void Failed (String error) {

EventDispatcher.dispatchEvent(this, "Failed", error);

}

@SimpleEvent(description = "This event is fired when the extension has saved the image.")

public void Saved (String path) {

EventDispatcher.dispatchEvent(this, "Saved", path);

}

}