可变参数科特林Java的互操作工作不正常

Question

对于makeSceneTransitionAnimation有两个静态函数

public static ActivityOptionsCompat makeSceneTransitionAnimation(Activity activity,
        View sharedElement, String sharedElementName)

和

    public static ActivityOptionsCompat makeSceneTransitionAnimation(Activity activity,
        Pair<View, String>... sharedElements)

第一个函数调用正常工作在科特林但调用第二个的时候，这两个调用返回错误

        val imageTransition = Pair<View, String>(imageView, imageView.getTransitionName());
        val textTransition = Pair<View, String>(textView, textView.getTransitionName());
        val transitionList = Array(2, { imageTransition });
        transitionList[1] = textTransition;
        val options = ActivityOptionsCompat.makeSceneTransitionAnimation(this, *transitionList);

和

        val imageTransition = Pair<View, String>(imageView, imageView.getTransitionName());
        val textTransition = Pair<View, String>(textView, textView.getTransitionName());
        val options = ActivityOptionsCompat.makeSceneTransitionAnimation(this, imageTransition, textTransition);

有没有一种合适的方式来得到这个工作，或者这是一个问题与互操作？

编辑添加更改，以确保它使用相同的类

val imageView : View = view.findViewById(android.R.id.icon);
val textView : View = view.findViewById(android.R.id.text1);
imageView.setTransitionName("imageTransition");
textView.setTransitionName("textTransition")

val imageTransition : android.support.v4.util.Pair<android.view.View, java.lang.String> = android.support.v4.util.Pair.create(imageView, imageView.getTransitionName() as java.lang.String);
val textTransition : android.support.v4.util.Pair<android.view.View, java.lang.String> = android.support.v4.util.Pair.create(textView, textView.getTransitionName() as java.lang.String);
val transitionList = Array(2, { imageTransition });
transitionList[1] = textTransition;
val options = ActivityOptionsCompat.makeSceneTransitionAnimation(this, *transitionList);

目前的编译器错误：

Error:(72, 84) The spread operator (*foo) may only be applied in a vararg position
Error:(72, 99) No value passed for parameter sharedElementName

而另一

val imageView : View = view.findViewById(android.R.id.icon);
val textView : View = view.findViewById(android.R.id.text1);
imageView.setTransitionName("imageTransition");
textView.setTransitionName("textTransition")

val imageTransition : android.support.v4.util.Pair<android.view.View, java.lang.String> = android.support.v4.util.Pair.create(imageView, imageView.getTransitionName() as java.lang.String);
val textTransition : android.support.v4.util.Pair<android.view.View, java.lang.String> = android.support.v4.util.Pair.create(textView, textView.getTransitionName() as java.lang.String);
val options = ActivityOptionsCompat.makeSceneTransitionAnimation(this, imageTransition, textTransition);

目前的编译器错误：

Error:(72, 84) Type mismatch: inferred type is android.support.v4.util.Pair<android.view.View, java.lang.String> but android.view.View! was expected
Error:(72, 101) Type mismatch: inferred type is android.support.v4.util.Pair<android.view.View, java.lang.String> but kotlin.String! was expected

Answer 1

答案是数组变量之前*符号：

import android.support.v4.util.Pair as AndroidPair

// ...    

val pair1 = AndroidPair<View, String>(fab, 
    getString(R.string.transition_fab))
val pair2 = AndroidPair<View, String>(findViewById(R.id.app_bar),
    getString(R.string.transition_appbar))

ActivityOptionsCompat.makeSceneTransitionAnimation(this@MyActivity,
    *arrayOf(pair1, pair2)).toBundle();

Answer 2

这为我工作：

import android.support.v4.util.Pair

// ...    

val options = ActivityOptionsCompat.makeSceneTransitionAnimation(activity,
        Pair<View, String>(image, image.transitionName),
        Pair<View, String>(title, title.transitionName))

startActivity(intent, options.toBundle())

Answer 3

这可能是你不小心使用kotlin.Pair的android.util.Pair代替的情况。请下列导入指令添加到您的文件的开头：

import android.util.Pair

Answer 4

这是一个完整的代码片段，我会建议为：

companion object {
    const val EXTRA_ITEM = "EXTRA_ITEM"
    const val TRANSITION_NAME_IMAGE = "TRANSITION_NAME_IMAGE"
    const val TRANSITION_NAME_TEXT = "TRANSITION_NAME_TEXT"
  }

  override fun onItemClick(pos: Int, item: Item, imageView: ImageView, textView: TextView) {
    val intent = Intent(context, YourActivity::class.java)
    intent.putExtra(EXTRA_ITEM, item)
    intent.putExtra(
      TRANSITION_NAME_IMAGE,
      ViewCompat.getTransitionName(imageView)
    )
    intent.putExtra(
      TRANSITION_NAME_TEXT,
      ViewCompat.getTransitionName(textView)
    )

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
      val optionsCompat = ActivityOptionsCompat.makeSceneTransitionAnimation(
        context as Activity,
        androidx.core.util.Pair<View,String>(imageView, imageView.transitionName),
        androidx.core.util.Pair<View,String>(textView, textView.transitionName)
      )
      startActivity(intent, optionsCompat.toBundle())
    } else {
      startActivity(intent)
    }
  }

你必须还实现了交易这个方法在你的返回到之前的屏幕活动。

override fun onOptionsItemSelected(item: MenuItem): Boolean {
    val id = item.itemId
    if (id == android.R.id.home) {
      supportFinishAfterTransition()
      return true
    }
    return super.onOptionsItemSelected(item)
  }

Answer 5

关键是要启动对qazxsw POI是这样的：否则qazxsw POI它的投诉。