Android cannot capture picture from WebView, view.postDelay not running - java

I need to do a screenshot from my WebView, or you can say, Convert html to Bitmap.
And I have a trouble with this task. view.postDelayd(new Runnable() { ... don't create a new Thread, where my capture picture is
private void Main {
WebView webView = new WebView(this.context); //init WebView
saveHtmlImage(webView); //running method for capture picture
}
private void saveHtmlImage(final WebView webView){
webView.setWebViewClient(new WebViewClient() {
public void onPageFinished(WebView view, String url) {
view.postDelayed(new Runnable() { //trouble here
#Override
public void run() {
Picture picture = webView.capturePicture();
Bitmap b = Bitmap.createBitmap( picture.getWidth(),
picture.getHeight(), Bitmap.Config.ARGB_8888);
Canvas c = new Canvas(b);
picture.draw(c);
}
}, 100);
}
});
//set HTML code for WebView
webView.loadDataWithBaseURL(null, "<TABLE border=\"1\"\n" +
" summary=\"This table gives some statistics about fruit\n" +
" flies: average height and weight, and percentage\n" +
" with red eyes (for both males and females).\">\n" +
"<CAPTION><EM>A test table with merged cells</EM></CAPTION>\n" +
"<TR><TH rowspan=\"2\"><TH colspan=\"2\">Average\n" +
" <TH rowspan=\"2\">Red<BR>eyes\n" +
"<TR><TH>height<TH>weight\n" +
"<TR><TH>Males<TD>1.9<TD>0.003<TD>40%\n" +
"<TR><TH>Females<TD>1.7<TD>0.002<TD>43%\n" +
"</TABLE>", "text/html", "UTF-8", null);
}
When I don't use Runnable, Bitmap.createBitmap(...) give exception -
java.lang.IllegalArgumentException: width and height must be > 0.
When I'm using
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
intead
view.postDelayd(new Runnable() {
the method
webView.capturePicture();
return empty screenshot, but with correct width and height
Please help me.
Say What I'm doing wrong, or maybe give me another example of code that can convert html code to Bitmap Image.
Thank you in advance for your reply.

Just do a force to fit fullscreen and code a standard screenshot and convert to bitmap. If you need an example let me know.

Related

How to convert a HTML string to an image in Android AsyncTask?

is there anybody know how to convert a HTML page to an image in Android AsyncTask or background thread?
Environment: Android Studio 2.0 Beta 5, Android Tablets with API version 18, 19
I have tried WebView control with two solutions but all failed.
Solution 1: Javascript
It doesn't work, getDrawingCache(true) always returns null.
public void generateImage()
{
final WebView mWebView = new WebView(this);
mWebView.setLayerType(View.LAYER_TYPE_SOFTWARE, null);
mWebView.getSettings().setDefaultZoom(WebSettings.ZoomDensity.MEDIUM);
mWebView.setInitialScale(150);
mWebView.getSettings().setLoadWithOverviewMode(true);
mWebView.getSettings().setJavaScriptEnabled(true);
mWebView.setDrawingCacheEnabled(true);
mWebView.addJavascriptInterface(new JavaScriptInterface(mWebView), "Android");
String html = "<html><body onload=\"Android.captureImage()\">hello world<p>bbb</p></body></html>";
mWebView.loadDataWithBaseURL("", html, "text/html", "utf-8", "");
}
public class JavaScriptInterface
{
private WebView mWebView;
public JavaScriptInterface(WebView webView) {
mWebView = webView;
}
#JavascriptInterface
public void captureImage()
{
Bitmap b = mWebView.getDrawingCache(true);
if(b==null){
System.out.println("... b is null");
return;
}
System.out.println("... height "+b.getHeight()+" width "+b.getWidth());
}
}
Solution 2: WebViewClient + PictureListener
This one works on Android API 19. But on Android API 18, the callback "onNewPicture" is never get called.
public void generateImage()
{
final WebView mWebView = new WebView(this);
mWebView.setLayerType(View.LAYER_TYPE_SOFTWARE, null);
mWebView.getSettings().setDefaultZoom(WebSettings.ZoomDensity.MEDIUM);
mWebView.setInitialScale(150);
mWebView.getSettings().setLoadWithOverviewMode(true);
String html = "<html><body>hello world<p>bbb</p></body></html>";
mWebView.loadDataWithBaseURL("", html, "text/html", "utf-8", "");
mWebView.setWebViewClient(new WebViewClient() {
#Override
public void onPageFinished(WebView view, String url) {
System.out.println("............ onPageFinished");
super.onPageFinished(view, url);
view.clearCache(true);
}
});
mWebView.setPictureListener(new WebView.PictureListener() {
#Override
public void onNewPicture(WebView view, Picture picture)
{
if (picture == null) {
return;
}
Picture pic = mWebView.capturePicture();
if(pic==null){
System.out.println("............ pic is null");
return;
}
System.out.println("onNewPicture............ width ["+pic.getWidth()+"] hieght ["+pic.getHeight()+"]");
final Bitmap bm = Bitmap.createBitmap(pic.getWidth(), pic.getHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bm);
canvas.drawPicture(pic);
}
});
}
I can get image if I create WebView control in following way
final WebView mWebView = (WebView) findViewById(R.id.webview);
But I have to convert the html page string in an AsyncTask or a background thread. there is no UI at all. Is there anybody know how to implement it?
Any help is appreciated.
first set layout parameter for your WebView, second you should call Webview.measure and WebView.layout methods then draw cache on a bitmap:
webView.setWebViewClient(new WebViewClient() {
public boolean shouldOverrideUrlLoading(final WebView view, String url) {
return false;
}
#Override
public void onPageFinished(final WebView view, String url) {
Log.i("HTML", "page finished loading " + url);
view.measure(View.MeasureSpec.makeMeasureSpec(512, View.MeasureSpec.EXACTLY), View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED));
view.layout(0, 0, view.getMeasuredWidth(), view.getMeasuredHeight());
final Bitmap bmp = Bitmap.createBitmap(view.getMeasuredWidth(), view.getMeasuredHeight(), Bitmap.Config.ARGB_8888);
final Canvas canvas = new Canvas(bmp);
canvas.drawBitmap(view.getDrawingCache(), 0, 0, new Paint());
// bitmap is ready
}
);
IMPORTANT TIP: make sure your WebView height and width isn't zero.

Duplicates picture on my android application

I have an Android application that loading some information and one picture like a blog, but sometimes I got duplicates picture, I don't know what is the problem, but sometimes it works good.
Someone here can help me ?
Here's the code below:
"endereco" is the URL of picture and "view" is the context that I pass on the class that extends activity"
public void loadImg(final View view , final String endereco){
Thread nova = new Thread()
{
public void run() {
Bitmap img = null;
try
{
URL url = new URL(endereco);
HttpURLConnection conexao = (HttpURLConnection) url.openConnection();
InputStream input = conexao.getInputStream();
img = BitmapFactory.decodeStream(input);
Log.i("Funcionou","Foto: " + endereco);
} catch (Exception ex){
Log.i("Erro",ex.toString());
}
final Bitmap imgAux = img;
handler.post(new Runnable() {
#Override
public void run() {
ImageView imageView = (ImageView) view.findViewById(R.id.txtfoto);
imageView.setImageBitmap(imgAux);
}
});
}
};
nova.start();
nova.currentThread().interrupt();
}
If you are downloading an image from a wbepage or server i wouldnt do it in a thread give it its own AsyncTask it gives you a whole load of methods that allow you to better control over what you are downloading and what to do with it after it has been downloaded.
Check out the Android dev Docs http://developer.android.com/reference/android/os/AsyncTask.html

Web scraping with Android on page with dynamic content (JavaScript)

As a step in auto-filling some fields in a flow I need to scrape a URL that has its interesting content filled dynamically by JavaScript.
Based on a cars license plates I can look up information on a government website, set an option and a value and submit.
The resulting page will hold the desired content in different tabs so I'll also have to navigate those. (Sorry cant give direct link to this but selecting "Registrerings­nummer", using "YN28579" as the value and pressing "Søg" will take you to the page.)
I've done this with a WebViewClient in another Activity so it is possible to navigate the website directly on the android phone/tablet. But in this other Activity I don't want to display the resulting page just scrape some of the data items.
Here is how I've done it with the WebViewClient:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.webview);
((Button)findViewById(R.id.btnBack)).setVisibility(View.VISIBLE);
wv = (WebView) findViewById(R.id.wv);
reg = getIntent().getStringExtra("reg");
wv.getSettings().setJavaScriptEnabled(true);
wv.setWebViewClient(new WebViewClient() {
private ProgressDialog pd;
private int count = 0;
#Override
public void onPageFinished(WebView view, String url) {
if (count==1) {
view.loadUrl("javascript:document.getElementById('regnr').checked=true;"
+"document.getElementById('soegeord').value='"+reg+"';"
+"document.getElementById('searchForm').submit();"
+"DMR.WaitForLoad.on();");
} else if (count>=2) {
view.loadUrl("javascript:document.body.innerHTML " +
"= '<div class=\"tabNav\">'+document.getElementsByClassName('tabNav')[0].innerHTML+'</div>';" +
"document.getElementsByClassName('h-tab-content')[0].style.width='320px';" +
"document.getElementsByClassName('h-tab-btns')[0].style.width='320px';" +
"document.getElementsByClassName('h-tab-btns')[0].style.height='45px';" +
"document.getElementsByTagName('ul')[0].style.display='inline';" +
"document.head.appendChild='<meta name=\"viewport\" content=\"width=device-width\">';" +
"document.body.style.minWidth ='300px';");
if (pd!=null) {
pd.dismiss();
}
view.setVisibility(View.VISIBLE);
}
}
#Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
if (pd==null || !pd.isShowing()) {
pd = ProgressDialog.show(SkatActivity.this, "cars.dk", "Vent venligst...", true, false);
}
count++;
}
#Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
});
wv.loadUrl("https://motorregister.skat.dk/dmr-front/appmanager/skat/dmr?_nfpb=true&_nfpb=true&_pageLabel=vis_koeretoej_side&_nfls=false");
}
I can't seem to figure out how to incorporate this in
Do you set the WebView as invisible? Found this question that seems to be working along those same lines, but I can't figure out how to get the working WebViewClient hidden but usable inside this other activity?

Replacing Bitmap with Drawable in Drag and Drop Example

I'm attempting to modify a drag and drop gridView example to use a specific drawable instead of the bitmap used in the example.
I believe I'll need to edit the line: Bitmap bmp = Bitmap.createBitmap(150, 150, Bitmap.Config.RGB_565);
and change it to something such as Bitmap bmp = R.drawable.sqwhite; but I don't think that's exactly what I'm looking for.
Any suggestions?
Source:
public class DraggableGridViewSampleActivity extends Activity {
static Random random = new Random();
static String[] words = "the of and a to in is be that was he for it with as his I on have at by not they this had are but from or she an which you one we all were her would there their will when who him been has more if no out do so can what up said about other into than its time only could new them man some these then two first may any like now my such make over our even most me state after also made many did must before back see through way where get much go well your know should down work year because come people just say each those take day good how long Mr own too little use US very great still men here life both between old under last never place same another think house while high right might came off find states since used give against three himself look few general hand school part small American home during number again Mrs around thought went without however govern don't does got public United point end become head once course fact upon need system set every war put form water took".split(" ");
DraggableGridView dgv;
Button button1, button2;
ArrayList<String> poem = new ArrayList<String>();
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
dgv = ((DraggableGridView)findViewById(R.id.vgv));
button1 = ((Button)findViewById(R.id.button1));
button2 = ((Button)findViewById(R.id.button2));
setListeners();
}
private void setListeners()
{
dgv.setOnRearrangeListener(new OnRearrangeListener() {
public void onRearrange(int oldIndex, int newIndex) {
String word = poem.remove(oldIndex);
if (oldIndex < newIndex)
poem.add(newIndex, word);
else
poem.add(newIndex, word);
}
});
dgv.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
dgv.removeViewAt(arg2);
poem.remove(arg2);
}
});
button1.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
String word = words[random.nextInt(words.length)];
ImageView view = new ImageView(DraggableGridViewSampleActivity.this);
view.setImageBitmap(getThumb(word));
dgv.addView(view);
poem.add(word);
}
});
button2.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
String finishedPoem = "";
for (String s : poem)
finishedPoem += s + " ";
new AlertDialog.Builder(DraggableGridViewSampleActivity.this)
.setTitle("Here's your poem!")
.setMessage(finishedPoem).show();
}
});
}
private Bitmap getThumb(String s)
{
Bitmap bmp = Bitmap.createBitmap(150, 150, Bitmap.Config.RGB_565);
Canvas canvas = new Canvas(bmp);
Paint paint = new Paint();
paint.setColor(Color.rgb(random.nextInt(128), random.nextInt(128), random.nextInt(128)));
paint.setTextSize(24);
paint.setFlags(Paint.ANTI_ALIAS_FLAG);
canvas.drawRect(new Rect(0, 0, 150, 150), paint);
paint.setColor(Color.WHITE);
paint.setTextAlign(Paint.Align.CENTER);
canvas.drawText(s, 75, 75, paint);
return bmp;
}
}
Full Source:
https://github.com/thquinn/DraggableGridView

Display Animated GIF

I want to display animated GIF images in my aplication.
As I found out the hard way Android doesn't support animated GIF natively.
However it can display animations using AnimationDrawable:
Develop > Guides > Images & Graphics > Drawables Overview
The example uses animation saved as frames in application resources but what I need is to display animated gif directly.
My plan is to break animated GIF to frames and add each frame as drawable to AnimationDrawable.
Does anyone know how to extract frames from animated GIF and convert each of them into Drawable?
Android actually can decode and display animated GIFs, using android.graphics.Movie class.
This is not too much documented, but is in SDK Reference. Moreover, it is used in Samples in ApiDemos in BitmapDecode example with some animated flag.
UPDATE:
Use glide:
dependencies {
implementation 'com.github.bumptech.glide:glide:4.9.0'
}
usage:
Glide.with(context).load(GIF_URI).into(new DrawableImageViewTarget(IMAGE_VIEW));
see docs
also put (main/assets/htmls/name.gif) [with this html adjust to the size]
<html style="margin: 0;">
<body style="margin: 0;">
<img src="name.gif" style="width: 100%; height: 100%" />
</body>
</html>
declare in your Xml for example like this (main/res/layout/name.xml): [you define the size, for example]
<WebView
android:layout_width="70dp"
android:layout_height="70dp"
android:id="#+id/webView"
android:layout_gravity="center_horizontal" />
in your Activity put the next code inside of onCreate
web = (WebView) findViewById(R.id.webView);
web.setBackgroundColor(Color.TRANSPARENT); //for gif without background
web.loadUrl("file:///android_asset/htmls/name.html");
if you want load dynamically you have to load the webview with data:
// or "[path]/name.gif" (e.g: file:///android_asset/name.gif for resources in asset folder), and in loadDataWithBaseURL(), you don't need to set base URL, on the other hand, it's similar to loadData() method.
String gifName = "name.gif";
String yourData = "<html style=\"margin: 0;\">\n" +
" <body style=\"margin: 0;\">\n" +
" <img src=" + gifName + " style=\"width: 100%; height: 100%\" />\n" +
" </body>\n" +
" </html>";
// Important to add this attribute to webView to get resource from outside.
webView.getSettings().setAllowFileAccess(true);
// Notice: should use loadDataWithBaseURL. BaseUrl could be the base url such as the path to asset folder, or SDCard or any other path, where your images or the other media resides related to your html
webView.loadDataWithBaseURL("file:///android_asset/", yourData, "text/html", "utf-8", null);
// Or if you want to load image from SD card or where else, here is the idea.
String base = Environment.getExternalStorageDirectory().getAbsolutePath().toString();
webView.loadDataWithBaseURL(base + '/', yourData, "text/html", "utf-8", null);
suggestion: is better load gif with static images for more information check https://developer.android.com/reference/android/graphics/drawable/AnimationDrawable.html
That's it, I hope you help.
Currently we can use Glide https://github.com/bumptech/glide
I solved the problem by splitting gif animations into frames before saving it to phone, so I would not have to deal with it in Android.
Then I download every frame onto phone, create Drawable from it and then create AnimationDrawable - very similar to example from my question
i found a very easy way, with a nice and simple working example here
display animated widget
Before getting it working there are some chages to do do in the code
IN THE FOLLOWING
#Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceStated);
setContentView(new MYGIFView());
}
}
just replace
setContentView(new MYGIFView());
in
setContentView(new MYGIFView(this));
AND IN
public GIFView(Context context) {
super(context);
Provide your own gif animation file
is = context.getResources().openRawResource(R.drawable.earth);
movie = Movie.decodeStream(is);
}
REPLACE THE FIRST LINE IN
public MYGIFView(Context context) {
according to the name of the class...
after done this little changes it should work as for me...
hope this help
Glide 4.6
1. To Load gif
GlideApp.with(context)
.load(R.raw.gif) // or url
.into(imageview);
2. To get the file object
GlideApp.with(context)
.asGif()
.load(R.raw.gif) //or url
.into(new SimpleTarget<GifDrawable>() {
#Override
public void onResourceReady(#NonNull GifDrawable resource, #Nullable Transition<? super GifDrawable> transition) {
resource.start();
//resource.setLoopCount(1);
imageView.setImageDrawable(resource);
}
});
Ways to show animated GIF on Android:
Movie class. As mentioned above, it's fairly buggy.
WebView. It's very simple to use and usually works. But sometimes it starts to misbehave, and it's always on some obscure devices you don't have. Plus, you can’t use multiple instances in any kind of list views, because it does things to your memory. Still, you might consider it as a primary approach.
Custom code to decode gifs into bitmaps and show them as Drawable or ImageView. I'll mention two libraries:
https://github.com/koral--/android-gif-drawable - decoder is implemented in C, so it's very efficient.
https://code.google.com/p/giffiledecoder - decoder is implemented in Java, so it's easier to work with. Still reasonably efficient, even with large files.
You'll also find many libraries based on GifDecoder class. That's also a Java-based decoder, but it works by loading the entire file into memory, so it's only applicable to small files.
I had a really hard time to have animated gif working in Android. I only had following two working:
WebView
Ion
WebView works OK and really easy, but the problem is it makes the view loads slower and the app would be unresponsive for a second or so. I did not like that. So I have tried different approaches (DID NOT WORK):
ImageViewEx is deprecated!
picasso did not load animated gif
android-gif-drawable looks great, but it caused some wired NDK issues in my project. It caused my local NDK library stop working, and I was not able to fix it
I had some back and forth with Ion; Finally, I have it working, and it is really fast :-)
Ion.with(imgView)
.error(R.drawable.default_image)
.animateGif(AnimateGifMode.ANIMATE)
.load("file:///android_asset/animated.gif");
Glide
Image Loader Library for Android, recommended by Google.
Glide is quite similar to Picasso but this is much faster than Picasso.
Glide consumes less memory than Picasso.
What that Glide has but Picasso doesn't
An ability to load GIF Animation to a simple ImageView might be the most interesting feature of Glide. And yes, you can't do that with Picasso.
Some important links-
https://github.com/bumptech/glide
http://inthecheesefactory.com/blog/get-to-know-glide-recommended-by-google/en
Use ImageViewEx, a library that makes using a gif as easy as using an ImageView.
Try this, bellow code display gif file in progressbar
loading_activity.xml(in Layout folder)
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#ffffff" >
<ProgressBar
android:id="#+id/progressBar"
style="?android:attr/progressBarStyleLarge"
android:layout_width="70dp"
android:layout_height="70dp"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:indeterminate="true"
android:indeterminateDrawable="#drawable/custom_loading"
android:visibility="gone" />
</RelativeLayout>
custom_loading.xml(in drawable folder)
here i put black_gif.gif(in drawable folder), you can put your own gif here
<?xml version="1.0" encoding="utf-8"?>
<animated-rotate xmlns:android="http://schemas.android.com/apk/res/android"
android:drawable="#drawable/black_gif"
android:pivotX="50%"
android:pivotY="50%" />
LoadingActivity.java(in res folder)
public class LoadingActivity extends Activity {
ProgressBar bar;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_loading);
bar = (ProgressBar) findViewById(R.id.progressBar);
bar.setVisibility(View.VISIBLE);
}
}
Nobody has mentioned the Ion or Glide library. they work very well.
It's easier to handle compared to a WebView.
I have had success with the solution proposed within this article, a class called GifMovieView, which renders a View which can then be displayed or added to a specific ViewGroup. Check out the other methods presented in parts 2 and 3 of the specified article.
The only drawback to this method is that the antialiasing on the movie is not that good (must be a side-effect of using the "shady" Android Movie Class). You are then better off setting the background to a solid color within your animated GIF.
Some thoughts on the BitmapDecode example... Basically it uses the ancient, but rather featureless Movie class from android.graphics.
On recent API versions you need to turn off hardware acceleration, as described here. It was segfaulting for me otherwise.
<activity
android:hardwareAccelerated="false"
android:name="foo.GifActivity"
android:label="The state of computer animation 2014">
</activity>
Here is the BitmapDecode example shortened with only the GIF part. You have to make your own Widget (View) and draw it by yourself. Not quite as powerful as an ImageView.
import android.app.Activity;
import android.content.Context;
import android.graphics.*;
import android.os.*;
import android.view.View;
public class GifActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(new GifView(this));
}
static class GifView extends View {
Movie movie;
GifView(Context context) {
super(context);
movie = Movie.decodeStream(
context.getResources().openRawResource(
R.drawable.some_gif));
}
#Override
protected void onDraw(Canvas canvas) {
if (movie != null) {
movie.setTime(
(int) SystemClock.uptimeMillis() % movie.duration());
movie.draw(canvas, 0, 0);
invalidate();
}
}
}
}
2 other methods, one with ImageView another with WebView can be found in this fine tutorial. The ImageView method uses the Apache licensed android-gifview from Google Code.
#PointerNull gave good solution, but it is not perfect. It doesn't work on some devices with big files and show buggy Gif animation with delta frames on pre ICS version.
I found solution without this bugs. It is library with native decoding to drawable: koral's android-gif-drawable.
For only android API (Android Pie)28 and + use AnimatedImageDrawable as
// ImageView from layout
val ima : ImageView = findViewById(R.id.img_gif)
// create AnimatedDrawable
val decodedAnimation = ImageDecoder.decodeDrawable(
// create ImageDecoder.Source object
ImageDecoder.createSource(resources, R.drawable.tenor))
// set the drawble as image source of ImageView
ima.setImageDrawable(decodedAnimation)
// play the animation
(decodedAnimation as? AnimatedImageDrawable)?.start()
XML code, add a ImageView
<ImageView
android:id="#+id/img_gif"
android:background="#drawable/ic_launcher_background" <!--Default background-->
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
android:layout_width="200dp"
android:layout_height="200dp" />
AnimatedImageDrawable is a child of Drawable and created by ImageDecoder.decodeDrawable
ImageDecoder.decodeDrawable which further required the instance of ImageDecoder.Source created by ImageDecoder.createSource.
ImageDecoder.createSource can only take source as a name, ByteBuffer, File, resourceId, URI, ContentResolver to create source object and uses it to create AnimatedImageDrawable as Drawable (polymorphic call)
static ImageDecoder.Source createSource(AssetManager assets, String fileName)
static ImageDecoder.Source createSource(ByteBuffer buffer)
static ImageDecoder.Source createSource(File file)
static ImageDecoder.Source createSource(Resources res, int resId)
static ImageDecoder.Source createSource(ContentResolver cr, Uri uri)
Note: You can also create Bitmap using ImageDecoder#decodeBitmap.
Output:
AnimatedDrawable also supports resizing, frame and color manipulation
Put it into a WebView, it has to be able to display it correctly, since the default browser supports gif files. (Froyo+, if i am not mistaken)
There are two options to load animated gifs into our Android apps
1)Using Glide to load the gif into an ImageView.
String urlGif = "https://cdn.dribbble.com/users/263558/screenshots/1337078/dvsd.gif";
//add Glide implementation into the build.gradle file.
ImageView imageView = (ImageView)findViewById(R.id.imageView);
Uri uri = Uri.parse(urlGif);
Glide.with(getApplicationContext()).load(uri).into(imageView);
2) Using an html to load the gif into a WebView
Create the html with the address to the .gif file:
<html style="margin: 0;">
<body style="margin: 0;">
<img src="https://..../myimage.gif" style="width: 100%; height: 100%" />
</body>
</html>
store this file into the assets directory:
The load this html into the WebView of your application:
WebView webView = (WebView)findViewById(R.id.webView);
webView = (WebView) findViewById(R.id.webView);
webView.loadUrl("file:///android_asset/html/webpage_gif.html");
Heres is a complete example of this two options.
I think the better library to handle gif files is this one: by koral
Used it and i'm successful and this library is dedicated to GIF'S; but where as the picasso and glide are general purpose image framework; so i think the developers of this library have entirely concentrated on gif files
Use fresco. Here's how to do it:
http://frescolib.org/docs/animations.html
Here's the repo with the sample:
https://github.com/facebook/fresco/tree/master/samples/animation
Beware fresco does not support wrap content!
Just wanted to add that the Movie class is now deprecated.
This class was deprecated in API level P.
It is recommended to use this
AnimatedImageDrawable
Drawable for drawing animated images (like GIF).
Similar to what #Leonti said, but with a little more depth:
What I did to solve the same problem was open up GIMP, hide all layers except for one, export it as its own image, and then hide that layer and unhide the next one, etc., until I had individual resource files for each one. Then I could use them as frames in the AnimationDrawable XML file.
Something I did for showing gifs in apps. I extended ImageView so people can use its attributes freely. It can show gifs from url or from the assets directory.
The library also makes it easy for extending classes to inherit from it and extend it to support different methods to initialize the gif.
https://github.com/Gavras/GIFView
There's a little guide on the github page.
It was also published on Android Arsenal:
https://android-arsenal.com/details/1/4947
Use example:
From XML:
<com.whygraphics.gifview.gif.GIFView xmlns:gif_view="http://schemas.android.com/apk/res-auto"
android:id="#+id/main_activity_gif_vie"
android:layout_width="200dp"
android:layout_height="200dp"
android:scaleType="center"
gif_view:gif_src="url:http://pop.h-cdn.co/assets/16/33/480x264/gallery-1471381857-gif-season-2.gif" />
In the activity:
GIFView mGifView = (GIFView) findViewById(R.id.main_activity_gif_vie);
mGifView.setOnSettingGifListener(new GIFView.OnSettingGifListener() {
#Override
public void onSuccess(GIFView view, Exception e) {
Toast.makeText(MainActivity.this, "onSuccess()", Toast.LENGTH_SHORT).show();
}
#Override
public void onFailure(GIFView view, Exception e) {
}
});
Setting the gif programmatically:
mGifView.setGifResource("asset:gif1");
Easiest way - Can be consider the below code
We can take advantage of Imageview setImageResource , refer below code for the same.
The below code can be used to show the image like gif incase if you have the multiple split image of gif. Just split the gif into individual png from a online tool and put image in the drawable like the below order
image_1.png, image_2.png, etc.
Have the handler to change the image dynamically.
int imagePosition = 1;
Handler handler = new Handler();
Runnable runnable = new Runnable() {
public void run() {
updateImage();
}
};
public void updateImage() {
appInstance.runOnUiThread(new Runnable() {
#Override
public void run() {
int resId = getResources().getIdentifier("image_" + imagePosition, "drawable", appInstance.getPackageName());
gifImageViewDummy.setImageResource(resId);
imagePosition++;
//Consider you have 30 image for the anim
if (imagePosition == 30) {
//this make animation play only once
handler.removeCallbacks(runnable);
} else {
//You can define your own time based on the animation
handler.postDelayed(runnable, 50);
}
//to make animation to continue use below code and remove above if else
// if (imagePosition == 30)
//imagePosition = 1;
// handler.postDelayed(runnable, 50);
//
}
});
}
The easy way to display animated GIF directly from URL to your app layout is to use WebView class.
Step 1:
In your layout XML
<WebView
android:id="#+id/webView"
android:layout_width="50dp"
android:layout_height="50dp"
/>
Step 2: In your Activity
WebView wb;
wb = (WebView) findViewById(R.id.webView);
wb.loadUrl("https://.......);
Step 3: In your Manifest.XML make Internet permission
<uses-permission android:name="android.permission.INTERNET" />
Step 4: In case you want to make your GIF background transparent and make GIF fit to your Layout
wb.setBackgroundColor(Color.TRANSPARENT);
wb.getSettings().setLoadWithOverviewMode(true);
wb.getSettings().setUseWideViewPort(true);
If you want to use Glide for loading gif:
Glide.with(this)
.asGif()
.load(R.raw.onboarding_layers) //Your gif resource
.apply(RequestOptions.diskCacheStrategyOf(DiskCacheStrategy.NONE))
.listener(new RequestListener<GifDrawable>() {
#Override
public boolean onLoadFailed(#Nullable #org.jetbrains.annotations.Nullable GlideException e, Object model, Target<GifDrawable> target, boolean isFirstResource) {
return false;
}
#Override
public boolean onResourceReady(GifDrawable resource, Object model, Target<GifDrawable> target, DataSource dataSource, boolean isFirstResource) {
resource.setLoopCount(1);
return false;
}
})
.into((ImageView) view.findViewById(R.id.layer_icons));
To save resources there is glide library for.
Have no idea why to use anything else, especialy webview to show image only.
Glide is perfect and easy library that prepares animated drawable from gif and put it directly to imageview.
The logic of gifdrawable handle animation itself.
Gif have lzw ziped raw rgb data of an animation inside.
There is no reason for complicated usage of webview and manage more files to show just a gif file in app.
First of all the Android browser should support Animated GIFs. If it doesn't then it's a bug! Have a look at the issue trackers.
If you're displaying these animated GIFs outside of a browser it might be a different story. To do what you're asking would require external library that supports the decoding of Animated GIFs.
The first port of call would be to look at Java2D or JAI (Java Advanced Imaging) API, although I would be very surprised if Android Dalvik would support those libraries in your App.
public class Test extends GraphicsActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(new SampleView(this));
}
private static class SampleView extends View {
private Bitmap mBitmap;
private Bitmap mBitmap2;
private Bitmap mBitmap3;
private Bitmap mBitmap4;
private Drawable mDrawable;
private Movie mMovie;
private long mMovieStart;
// Set to false to use decodeByteArray
private static final boolean DECODE_STREAM = true;
private static byte[] streamToBytes(InputStream is) {
ByteArrayOutputStream os = new ByteArrayOutputStream(1024);
byte[] buffer = new byte[1024];
int len;
try {
while ((len = is.read(buffer)) >= 0) {
os.write(buffer, 0, len);
}
} catch (java.io.IOException e) {
}
return os.toByteArray();
}
public SampleView(Context context) {
super(context);
setFocusable(true);
java.io.InputStream is;
is = context.getResources().openRawResource(R.drawable.icon);
BitmapFactory.Options opts = new BitmapFactory.Options();
Bitmap bm;
opts.inJustDecodeBounds = true;
bm = BitmapFactory.decodeStream(is, null, opts);
// now opts.outWidth and opts.outHeight are the dimension of the
// bitmap, even though bm is null
opts.inJustDecodeBounds = false; // this will request the bm
opts.inSampleSize = 4; // scaled down by 4
bm = BitmapFactory.decodeStream(is, null, opts);
mBitmap = bm;
// decode an image with transparency
is = context.getResources().openRawResource(R.drawable.icon);
mBitmap2 = BitmapFactory.decodeStream(is);
// create a deep copy of it using getPixels() into different configs
int w = mBitmap2.getWidth();
int h = mBitmap2.getHeight();
int[] pixels = new int[w * h];
mBitmap2.getPixels(pixels, 0, w, 0, 0, w, h);
mBitmap3 = Bitmap.createBitmap(pixels, 0, w, w, h,
Bitmap.Config.ARGB_8888);
mBitmap4 = Bitmap.createBitmap(pixels, 0, w, w, h,
Bitmap.Config.ARGB_4444);
mDrawable = context.getResources().getDrawable(R.drawable.icon);
mDrawable.setBounds(150, 20, 300, 100);
is = context.getResources().openRawResource(R.drawable.animated_gif);
if (DECODE_STREAM) {
mMovie = Movie.decodeStream(is);
} else {
byte[] array = streamToBytes(is);
mMovie = Movie.decodeByteArray(array, 0, array.length);
}
}
#Override
protected void onDraw(Canvas canvas) {
canvas.drawColor(0xFFCCCCCC);
Paint p = new Paint();
p.setAntiAlias(true);
canvas.drawBitmap(mBitmap, 10, 10, null);
canvas.drawBitmap(mBitmap2, 10, 170, null);
canvas.drawBitmap(mBitmap3, 110, 170, null);
canvas.drawBitmap(mBitmap4, 210, 170, null);
mDrawable.draw(canvas);
long now = android.os.SystemClock.uptimeMillis();
if (mMovieStart == 0) { // first time
mMovieStart = now;
}
if (mMovie != null) {
int dur = mMovie.duration();
if (dur == 0) {
dur = 1000;
}
int relTime = (int) ((now - mMovieStart) % dur);
mMovie.setTime(relTime);
mMovie.draw(canvas, getWidth() - mMovie.width(), getHeight()
- mMovie.height());
invalidate();
}
}
}
}
class GraphicsActivity extends Activity {
// set to true to test Picture
private static final boolean TEST_PICTURE = false;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public void setContentView(View view) {
if (TEST_PICTURE) {
ViewGroup vg = new PictureLayout(this);
vg.addView(view);
view = vg;
}
super.setContentView(view);
}
}
class PictureLayout extends ViewGroup {
private final Picture mPicture = new Picture();
public PictureLayout(Context context) {
super(context);
}
public PictureLayout(Context context, AttributeSet attrs) {
super(context, attrs);
}
#Override
public void addView(View child) {
if (getChildCount() > 1) {
throw new IllegalStateException(
"PictureLayout can host only one direct child");
}
super.addView(child);
}
#Override
public void addView(View child, int index) {
if (getChildCount() > 1) {
throw new IllegalStateException(
"PictureLayout can host only one direct child");
}
super.addView(child, index);
}
#Override
public void addView(View child, LayoutParams params) {
if (getChildCount() > 1) {
throw new IllegalStateException(
"PictureLayout can host only one direct child");
}
super.addView(child, params);
}
#Override
public void addView(View child, int index, LayoutParams params) {
if (getChildCount() > 1) {
throw new IllegalStateException(
"PictureLayout can host only one direct child");
}
super.addView(child, index, params);
}
#Override
protected LayoutParams generateDefaultLayoutParams() {
return new LayoutParams(LayoutParams.MATCH_PARENT,
LayoutParams.MATCH_PARENT);
}
#Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
final int count = getChildCount();
int maxHeight = 0;
int maxWidth = 0;
for (int i = 0; i < count; i++) {
final View child = getChildAt(i);
if (child.getVisibility() != GONE) {
measureChild(child, widthMeasureSpec, heightMeasureSpec);
}
}
maxWidth += getPaddingLeft() + getPaddingRight();
maxHeight += getPaddingTop() + getPaddingBottom();
Drawable drawable = getBackground();
if (drawable != null) {
maxHeight = Math.max(maxHeight, drawable.getMinimumHeight());
maxWidth = Math.max(maxWidth, drawable.getMinimumWidth());
}
setMeasuredDimension(resolveSize(maxWidth, widthMeasureSpec),
resolveSize(maxHeight, heightMeasureSpec));
}
private void drawPict(Canvas canvas, int x, int y, int w, int h, float sx,
float sy) {
canvas.save();
canvas.translate(x, y);
canvas.clipRect(0, 0, w, h);
canvas.scale(0.5f, 0.5f);
canvas.scale(sx, sy, w, h);
canvas.drawPicture(mPicture);
canvas.restore();
}
#Override
protected void dispatchDraw(Canvas canvas) {
super.dispatchDraw(mPicture.beginRecording(getWidth(), getHeight()));
mPicture.endRecording();
int x = getWidth() / 2;
int y = getHeight() / 2;
if (false) {
canvas.drawPicture(mPicture);
} else {
drawPict(canvas, 0, 0, x, y, 1, 1);
drawPict(canvas, x, 0, x, y, -1, 1);
drawPict(canvas, 0, y, x, y, 1, -1);
drawPict(canvas, x, y, x, y, -1, -1);
}
}
#Override
public ViewParent invalidateChildInParent(int[] location, Rect dirty) {
location[0] = getLeft();
location[1] = getTop();
dirty.set(0, 0, getWidth(), getHeight());
return getParent();
}
#Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
final int count = super.getChildCount();
for (int i = 0; i < count; i++) {
final View child = getChildAt(i);
if (child.getVisibility() != GONE) {
final int childLeft = getPaddingLeft();
final int childTop = getPaddingTop();
child.layout(childLeft, childTop,
childLeft + child.getMeasuredWidth(),
childTop + child.getMeasuredHeight());
}
}
}
}

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