Control Placeholder when updating SimpleDraweeView

[wlmirand]

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Description

When there is an Image already loaded into the SimpleDraweeView and I update it, the placeholder is shown and it "breaks" the transition. What I would like to achieve is to update the image, without seeing the Placeholder.

Reproduction

Can reproduce this in a sample project. The Activity layout has the SimpleDraweeView and a Button The core code is:

` private val draweeView by lazy { findViewById<SimpleDraweeView>(R.id.draweeView) } private val button by lazy { findViewById<Button>(R.id.button) }

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_main)
    
    //Load the Starting Image
    draweeView.setImageURI(
        Uri.parse(initialImage)
    )

    button.setOnClickListener {
        //Update the Images
        updateImage()
    }
}

private fun updateImage() {

    val controller = Fresco.newDraweeControllerBuilder()
        .setOldController(draweeView.controller)
        .setLowResImageRequest(
            ImageRequestBuilder.newBuilderWithSource(Uri.parse(finalImageLowRes))
                .disableDiskCache().build()
        )
        .setImageRequest(
            ImageRequestBuilder.newBuilderWithSource(Uri.parse(finalImageHighRes))
                .disableDiskCache().build()
        )
        .setRetainImageOnFailure(true)
        .build()

    draweeView.controller = controller
}

`

Solution

What I would like to have, is a way to specify in my Controller some way to tell Fresco to not display the Placeholder when Load the Image.

The Flow would be: When No Image Loaded -> New Request -> Show Placeholder -> Update with the Image When Image is already Loaded -> New Request -> Update with the Image

Additional Information

• Fresco version: [2.6.0]
• Platform version: [Reproduces from Api 29 to 31]. Did not test on other versions

[wlmirand]

For the moment, I uploaded my sample project into github: https://github.com/wlmirand/FrescoTest