我是安卓新手，我在安卓官方网站上遇到了这个教程，介绍如何创建图像GridView。我使用 kotlin 作为首选语言。在扩展BaseAdapter的适配器类中，我正在尝试按照教程中的指示设置图像视图布局参数，但是我收到一个错误，说GridView.LayoutParams是未解决的引用。以下是该类的完整代码：
class ImageAdapter(val context: Context) : BaseAdapter() {
// references to our images
val items: IntArray = intArrayOf(R.drawable.cat, R.drawable.daft_punk, R.drawable.gun, R.drawable.harvestors, R.drawable.intel, R.drawable.maserati, R.drawable.porsche, R.drawable.serveroom, R.drawable.spiderman, R.drawable.watch_dog)
override fun getItem(p0: Int): Any {
TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
}
override fun getItemId(p0: Int): Long {
return 0
}
override fun getCount(): Int {
return items.size
}
// create a new ImageView for each item referenced by the Adapter
override fun getView(p0: Int, p1: View?, p2: ViewGroup?): View {
var imageView: ImageView
if (p1 == null) {
// if it's not recycled, initialize some attributes
imageView= ImageView(context)
imageView.layoutParams= GridView.LayoutParams(85,85)
imageView.scaleType = ImageView.ScaleType.CENTER_CROP
imageView.setPadding(8, 8, 8, 8)
} else {
imageView=p1 as ImageView
}
imageView.setImageResource(items[p0])
return imageView
}
}
错误出在行imageView.layoutParams=GridView.LayoutParams(85,85)处的getView方法中。LayoutParams为红色，表示错误，当我将鼠标悬停在上面时，我收到消息：
未解析的参考：布局参数
如何成功设置这些LayoutParams？因为没有它们，GridView中的图像将以全高显示，我需要一个小图像，就像图库应用程序在我们的手机中显示它们一样。
后续问题：
当我用imageView.layoutParams=AbsListView.LayoutParams(85,85)替换imageView.layoutParams=GridView.LayoutParams(85,85)时，我得到一个java内存不足错误。 以下是完整堆栈跟踪：
08-16 06:58:11.412 4543-4543/gallerie.classmite.com.imageviewer E/dalvikvm-heap: Out of memory on a 18662416-byte allocation.
08-16 06:58:11.431 4543-4543/gallerie.classmite.com.imageviewer E/AndroidRuntime: FATAL EXCEPTION: main
Process: gallerie.classmite.com.imageviewer, PID: 4543 java.lang.OutOfMemoryError
at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method)
at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:609
at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:444)
at android.graphics.drawable.Drawable.createFromResourceStream(Drawable.java:840)
at android.content.res.Resources.loadDrawable(Resources.java:2166)
at android.content.res.Resources.getDrawable(Resources.java:710)
at android.widget.ImageView.resolveUri(ImageView.java:638)
at android.widget.ImageView.setImageResource(ImageView.java:367)
at gallerie.classmite.com.imageviewer.ImageAdapter.getView(ImageAdapter.kt:32)
at android.widget.AbsListView.obtainView(AbsListView.java:2372)
at android.widget.GridView.makeAndAddView(GridView.java:1345)
at android.widget.GridView.makeRow(GridView.java:345)
at android.widget.GridView.fillDown(GridView.java:287)
at android.widget.GridView.fillFromTop(GridView.java:421)
at android.widget.GridView.layoutChildren(GridView.java:1233)
at android.widget.AbsListView.onLayout(AbsListView.java:2166)
at android.view.View.layout(View.java:15127)
at android.view.ViewGroup.layout(ViewGroup.java:4862)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1888)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1742)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1651)
at android.view.View.layout(View.java:15127)
at android.view.ViewGroup.layout(ViewGroup.java:4862)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:515)
at android.widget.FrameLayout.onLayout(FrameLayout.java:450)
at android.view.View.layout(View.java:15127)
at android.view.ViewGroup.layout(ViewGroup.java:4862)
at com.android.internal.widget.ActionBarOverlayLayout.onLayout(ActionBarOverlayLayout.java:374)
at android.view.View.layout(View.java:15127)
at android.view.ViewGroup.layout(ViewGroup.java:4862)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:515)
at android.widget.FrameLayout.onLayout(FrameLayout.java:450)
at android.view.View.layout(View.java:15127)
at android.view.ViewGroup.layout(ViewGroup.java:4862)
at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2315)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2021)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1189)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6221)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:788)
at android.view.Choreographer.doCallbacks(Choreographer.java:591)
at android.view.Choreographer.doFrame(Choreographer.java:560)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:774)
at android.os.Handler.handleCallback(Handler.java:808)
at android.os.Handler.dispatchMessage(Handler.java:103)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:5315)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:829)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:645)
at dalvik.system.NativeStart.main(Native Method)
该错误仅在我在手机中运行该应用程序时发生，但是当我在模拟器中运行该应用程序时，它在我进行上述替换后完美运行。
你可以试试这个：
imageView.layoutParams = AbsListView.LayoutParams(85, 85)
AbsListView.LayoutParams用于检索孩子的LayoutParams时GridView。
因为静态成员可以在 Java 中由子类继承。当你调用GridView.LayoutParams时，它实际上是AbsListView.LayoutParams。但是，在 Kotlin 中，您不能以同样的方式执行此操作。在子类之外，只能使用超类的名称引用超类的伴随对象的成员。
后续问题的更新：
OutOfMemory错误表示您正在将大图像加载到ImageView。为了防止这种情况，您必须在显示图像之前缩小图像，请参阅本教程。您也可以使用一些图像加载框架(例如 Glide(来显示您的图像。
推荐阅读： 将图像加载到位图对象时出现奇怪的内存不足问题
不要像你那样设置布局参数
正确的方法是 imageParams=(GridView.LayoutParams( imageView.getLayoutParams((;
在上面的行中，"网格视图"应替换为图像的父视图视图
快乐编码.. :)