Html.ImageGetter TextView

Question

So Im using ImageGetter to display the images from JSON blog posts. Im getting the correct source in the log but the URL changes when it reaches setBounds. Any ideas?

Code:

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_blog_view);

    Intent intent = getIntent();
    Uri blogUri = intent.getData();
    mPost = blogUri.toString();
    mUrl = getIntent().getStringExtra("mUrl");

    TextView textView = (TextView) findViewById(R.id.scrollView1);
    textView.setText(Html.fromHtml(mPost, imgGetter, null));
}

private ImageGetter imgGetter = new ImageGetter(){
    @Override
    public Drawable getDrawable(String source){
         Drawable drawable = Drawable.createFromPath(source);
        try {
            drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());
        }catch (NullPointerException e){
            logException(e);
        }
        return drawable;
    }
};

The "source" before the try is

http://www.domain.com/images_blog/feature.png

but in the catch the error is:

Unable to decode stream:

java.io.FileNotFoundException: /http:/www.domain.com/images_blog/feature.png : open failed: ENOENT (No such file or directory)

Answer 1

An alternative solution using Glide and Coroutines with the assumption that a retry is not required:

import android.content.res.Resources
import android.graphics.Bitmap
import android.graphics.Canvas
import android.graphics.drawable.BitmapDrawable
import android.graphics.drawable.Drawable
import android.text.Html
import android.widget.TextView
import androidx.lifecycle.LifecycleCoroutineScope
import com.bumptech.glide.RequestManager
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.launch
import kotlinx.coroutines.withContext
import kotlin.math.roundToInt

class HtmlImageGetter(
    private val scope: LifecycleCoroutineScope,
    private val res: Resources,
    private val glide: RequestManager,
    private val htmlTextView: TextView
) : Html.ImageGetter {

    override fun getDrawable(url: String): Drawable {
        val holder = BitmapDrawablePlaceHolder(res, null)

        scope.launch(Dispatchers.IO) {
            runCatching {
                val bitmap = glide
                    .asBitmap()
                    .load(url)
                    .submit()
                    .get()

                val drawable = BitmapDrawable(res, bitmap)

                val scale = 1.25 // This makes the image scale in size.
                val width = (drawable.intrinsicWidth * scale).roundToInt()
                val height = (drawable.intrinsicHeight * scale).roundToInt()
                drawable.setBounds(0, 0, width, height)

                holder.setDrawable(drawable)
                holder.setBounds(0, 0, width, height)

                withContext(Dispatchers.Main) { htmlTextView.text = htmlTextView.text }
            }
        }

        return holder
    }

    internal class BitmapDrawablePlaceHolder(res: Resources, bitmap: Bitmap?) : BitmapDrawable(res, bitmap) {
        private var drawable: Drawable? = null

        override fun draw(canvas: Canvas) {
            drawable?.run { draw(canvas) }
        }

        fun setDrawable(drawable: Drawable) {
            this.drawable = drawable
        }
    }
}

In a Fragment or Activity use with HtmlCompat

val imageGetter = HtmlImageGetter(lifecycleScope, resources, glide, htmlTextView)
val styledText = HtmlCompat.fromHtml(htmlString, flags, imageGetter, null)
htmlTextView.text = styledText