android:load svg file from web and show it on image view

问题

I want to load a svg file from the web and show this file in an ImageView. For non vector images I use the Picasso library.

Is it possible to use this library for svg files as well?
Is there any way to load svg files from the web and show it in an ImageView?
I use the svg-android library to show svg files but i don\'t know how to get svg images from the web all the examples for this library use local files.

回答1:

Please refer to Having issue on Real Device using vector image in android. SVG-android

In the users post he asks a similar question and suggest he uses:

Create a member variable for the ImageView in your layout file;

private ImageView mImageView;

// intialize in onCreate(Bundle savedInstanceState)
mImageView = (ImageView) findViewById(R.id.image_view);

Download the image

private class HttpImageRequestTask extends AsyncTask<Void, Void, Drawable> {
    @Override
    protected Drawable doInBackground(Void... params) {
        try {


            final URL url = new URL("http://upload.wikimedia.org/wikipedia/commons/e/e8/Svg_example3.svg");
            HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
            InputStream inputStream = urlConnection.getInputStream();
            SVG svg = SVGParser. getSVGFromInputStream(inputStream);
            Drawable drawable = svg.createPictureDrawable();
            return drawable;
        } catch (Exception e) {
            Log.e("MainActivity", e.getMessage(), e);
        }

        return null;
    }

    @Override
    protected void onPostExecute(Drawable drawable) {
        // Update the view
        updateImageView(drawable);
    }
}

Then Apply the drawable to the Imageview

@SuppressLint("NewApi")
private void updateImageView(Drawable drawable){
    if(drawable != null){

        // Try using your library and adding this layer type before switching your SVG parsing
        mImageView.setLayerType(View.LAYER_TYPE_SOFTWARE, null);
        mImageView.setImageDrawable(drawable);
    }
}

SVGParser is available at https://github.com/pents90/svg-android

回答2:

Update: For newer version please checkout the Glide Samples (https://github.com/bumptech/glide/tree/master/samples/svg)

You can use Glide (https://github.com/bumptech/glide/tree/v3.6.0) and AndroidSVG (https://bitbucket.org/paullebeau/androidsvg).

There is also a sample from Glide: https://github.com/bumptech/glide/tree/v3.6.0/samples/svg/src/main/java/com/bumptech/svgsample/app

Setup GenericRequestBuilder

requestBuilder = Glide.with(mActivity)
    .using(Glide.buildStreamModelLoader(Uri.class, mActivity), InputStream.class)
            .from(Uri.class)
            .as(SVG.class)
            .transcode(new SvgDrawableTranscoder(), PictureDrawable.class)
            .sourceEncoder(new StreamEncoder())
            .cacheDecoder(new FileToStreamDecoder<SVG>(new SvgDecoder()))
            .decoder(new SvgDecoder())
                    .placeholder(R.drawable.ic_facebook)
                    .error(R.drawable.ic_web)
            .animate(android.R.anim.fade_in)
            .listener(new SvgSoftwareLayerSetter<Uri>());

Use RequestBuilder with uri

Uri uri = Uri.parse("https://de.wikipedia.org/wiki/Scalable_Vector_Graphics#/media/File:SVG_logo.svg");
            requestBuilder
                    .diskCacheStrategy(DiskCacheStrategy.SOURCE)
                            // SVG cannot be serialized so it's not worth to cache it
                    .load(uri)
                    .into(mImageView);

回答3:

Use this Glide based library loading xml

Add dependency

  compile 'com.github.ar-android:AndroidSvgLoader:1.0.0'

for latest android dependency Gradle use this instead

implementation 'com.github.ar-android:AndroidSvgLoader:1.0.0'

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <ImageView
        android:id="@+id/ivimage"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />
</LinearLayout>

MainActivity.java

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.list_item);            

        ImageView image = (ImageView) findViewById(R.id.ivimage);

        SvgLoader.pluck()
                .with(this)
                .setPlaceHolder(R.mipmap.ic_launcher, R.mipmap.ic_launcher)
                .load("http://www.clker.com/cliparts/u/Z/2/b/a/6/android-toy-h.svg", image);

    }

    @Override protected void onDestroy() {
        super.onDestroy();
        SvgLoader.pluck().close();
    }
}