mirror of
https://github.com/moparisthebest/open-keychain
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129 lines
4.1 KiB
Java
129 lines
4.1 KiB
Java
/*
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* Copyright (C) 2013 Antarix Tandon
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.sufficientlysecure.htmltextview;
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import android.content.Context;
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import android.graphics.Canvas;
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import android.graphics.drawable.BitmapDrawable;
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import android.graphics.drawable.Drawable;
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import android.os.AsyncTask;
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import android.text.Html.ImageGetter;
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import android.view.View;
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import org.apache.http.HttpResponse;
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import org.apache.http.client.methods.HttpGet;
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import org.apache.http.impl.client.DefaultHttpClient;
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import java.io.IOException;
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import java.io.InputStream;
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import java.net.MalformedURLException;
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public class UrlImageGetter implements ImageGetter {
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Context c;
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View container;
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/**
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* Construct the URLImageParser which will execute AsyncTask and refresh the container
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*
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* @param t
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* @param c
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*/
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public UrlImageGetter(View t, Context c) {
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this.c = c;
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this.container = t;
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}
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public Drawable getDrawable(String source) {
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UrlDrawable urlDrawable = new UrlDrawable();
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// get the actual source
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ImageGetterAsyncTask asyncTask = new ImageGetterAsyncTask(urlDrawable);
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asyncTask.execute(source);
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// return reference to URLDrawable where I will change with actual image from
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// the src tag
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return urlDrawable;
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}
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public class ImageGetterAsyncTask extends AsyncTask<String, Void, Drawable> {
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UrlDrawable urlDrawable;
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public ImageGetterAsyncTask(UrlDrawable d) {
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this.urlDrawable = d;
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}
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@Override
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protected Drawable doInBackground(String... params) {
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String source = params[0];
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return fetchDrawable(source);
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}
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@Override
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protected void onPostExecute(Drawable result) {
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// set the correct bound according to the result from HTTP call
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urlDrawable.setBounds(0, 0, 0 + result.getIntrinsicWidth(), 0 + result.getIntrinsicHeight());
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// change the reference of the current drawable to the result
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// from the HTTP call
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urlDrawable.drawable = result;
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// redraw the image by invalidating the container
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UrlImageGetter.this.container.invalidate();
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}
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/**
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* Get the Drawable from URL
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*
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* @param urlString
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* @return
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*/
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public Drawable fetchDrawable(String urlString) {
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try {
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InputStream is = fetch(urlString);
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Drawable drawable = Drawable.createFromStream(is, "src");
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drawable.setBounds(0, 0, 0 + drawable.getIntrinsicWidth(), 0 + drawable.getIntrinsicHeight());
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return drawable;
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} catch (Exception e) {
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return null;
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}
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}
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private InputStream fetch(String urlString) throws MalformedURLException, IOException {
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DefaultHttpClient httpClient = new DefaultHttpClient();
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HttpGet request = new HttpGet(urlString);
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HttpResponse response = httpClient.execute(request);
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return response.getEntity().getContent();
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}
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}
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@SuppressWarnings("deprecation")
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public class UrlDrawable extends BitmapDrawable {
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// the drawable that you need to set, you could set the initial drawing
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// with the loading image if you need to
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protected Drawable drawable;
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@Override
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public void draw(Canvas canvas) {
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// override the draw to facilitate refresh function later
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if (drawable != null) {
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drawable.draw(canvas);
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}
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}
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}
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}
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