Display Animated GIF-第2页回答

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?

标签： java android animated-gif

29条回答

旧时光的记忆

2楼-- · 2018-12-31 05:12

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());

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

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爱死公子算了

3楼-- · 2018-12-31 05:12

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.

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还给你的自由

4楼-- · 2018-12-31 05:15

@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.

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谁念西风独自凉

5楼-- · 2018-12-31 05:15

I solved this by spliting gif in frames and use standard android animation

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若你有天会懂

6楼-- · 2018-12-31 05:17

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.

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余欢

7楼-- · 2018-12-31 05:18

Use ImageViewEx, a library that makes using a gif as easy as using an ImageView.

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Display Animated GIF

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