I am new to android and I met this tutorial at the official android site on how to create a GridView of images. I am using kotlin as the language of choice. In the adapter class which extends BaseAdapter, I am trying to set the imageview layoutparams as indicated in the tutorial, but I get an error saying GridView.LayoutParams is unresolved reference. Here is the complete code for the class:
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
}
}
The error is in the getView method at the line imageView.layoutParams=GridView.LayoutParams(85,85). The LayoutParams is in red which means error, and when I hover on it, I get the message:
Unresolved reference: LayoutParams
How do I successfully set these LayoutParams? Because without them images in the GridView are displaying in their full height and I need a small image the same way the gallery app displays them in our phones.
Subsequent question:
When I replace the imageView.layoutParams=GridView.LayoutParams(85,85) with imageView.layoutParams=AbsListView.LayoutParams(85,85), I get a javaOutOfMemory error.
The following is the full stack trace:
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)
The error only occurs when I run the app in my phone, but when I run the app in the emulator, it works flawlessly after I made the replacement above.
