毕加索垃圾收集目标

Question

我正在使用Kotlin和Picasso来显示来自URL的图片。现在我正在用一个Intent共享一些内容，我正在共享图片和一些文本。这是我的代码。

         Picasso.get().load(URL).into(object : Target {
            override fun onBitmapLoaded(bitmap: Bitmap?, from: Picasso.LoadedFrom?) {

                val shareIntent: Intent = Intent().apply {
                    action = Intent.ACTION_SEND_MULTIPLE
                    putExtra(Intent.EXTRA_STREAM, getBitmapFromView(bitmap, this@DealActivity))
                    putExtra(Intent.EXTRA_TEXT, textForShare)

                    type = "image/jpeg"
                }
                startActivity(Intent.createChooser(shareIntent, "SEND"))

            }
            override fun onPrepareLoad(placeHolderDrawable: Drawable?) { }
            override fun onBitmapFailed(e: java.lang.Exception?, errorDrawable: Drawable?) { }
        })

这工作，一些时间。大多数时候，什么都没有发生。这是我的日志。

2020-05-14 22:12:52.378 11310-11402/il.co.nazooza D/Picasso: Dispatcher  enqueued     [R19]+2ms 
2020-05-14 22:12:52.380 11310-11430/il.co.nazooza D/Picasso: Hunter      executing    [R19]+3ms 
2020-05-14 22:12:53.150 11310-11430/il.co.nazooza D/Picasso: Hunter      decoded      [R19]+773ms 
2020-05-14 22:12:53.151 11310-11402/il.co.nazooza D/Picasso: Dispatcher  batched      [R19]+775ms for completion
2020-05-14 22:12:53.195 11310-11310/il.co.nazooza D/Picasso: Main        canceled     [R19]+813ms target got garbage collected

我读到目标必须被做成一个字段 但我在Kotlin中很难做到这一点。

Answer 1

看起来这段代码是在一个 Activity所以你只需要在你的 Activity 并将其存储在那里。

class MyActivity: Activity() {
    private var shareTarget: Target? = null
    //...
    fun someMethod() {
        shareTarget = object : Target {
            override fun onBitmapLoaded(bitmap: Bitmap?, from: Picasso.LoadedFrom?) {

                val shareIntent: Intent = Intent().apply {
                    action = Intent.ACTION_SEND_MULTIPLE
                    putExtra(Intent.EXTRA_STREAM, getBitmapFromView(bitmap, this@DealActivity))
                    putExtra(Intent.EXTRA_TEXT, textForShare)

                    type = "image/jpeg"
                }
                startActivity(Intent.createChooser(shareIntent, "SEND"))
                // don't need to store it any longer
                shareTarget = null

            }
            override fun onPrepareLoad(placeHolderDrawable: Drawable?) { }
            override fun onBitmapFailed(e: java.lang.Exception?, errorDrawable: Drawable?) {
                // don't need to store it any longer
                shareTarget = null
            }
        }
        Picasso.get().load(URL).into(shareTarget)
    }
    // ...
}

请注意，这是假设你每次只有一个这样的请求在飞行中。 如果你有多个请求，你将不得不把它们存储在一个集合中，或者多个变量中，或者类似的东西。