From ee2534e8bdf3ee2b5097cc2e23f105d8b5cbcba1 Mon Sep 17 00:00:00 2001
From: 62160052 <62160052@go.buu.ac.th>
Date: Sat, 24 Sep 2022 20:44:34 +0700
Subject: [PATCH] Add the binding adapter and connect the parts
---
.../executionHistory/executionHistory.lock | Bin 17 -> 17 bytes
.gradle/7.3.3/fileHashes/fileHashes.bin | Bin 76315 -> 76915 bytes
.gradle/7.3.3/fileHashes/fileHashes.lock | Bin 17 -> 17 bytes
.../buildOutputCleanup.lock | Bin 17 -> 17 bytes
.../marsphotos/overview/BindingAdapters.kt | 9 +++
.../marsphotos/overview/OverviewFragment.kt | 4 +-
.../marsphotos/overview/PhotoGridAdapter.kt | 60 ++++++++++++------
app/src/main/res/layout/fragment_overview.xml | 2 +
8 files changed, 56 insertions(+), 19 deletions(-)
diff --git a/.gradle/7.3.3/executionHistory/executionHistory.lock b/.gradle/7.3.3/executionHistory/executionHistory.lock
index 406dc8a79a5616184a22efbc9c745acc62fc1658..87ee22b84ecf8000cc16d86f6a12709df8bc83a0 100644
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diff --git a/.gradle/7.3.3/fileHashes/fileHashes.bin b/.gradle/7.3.3/fileHashes/fileHashes.bin
index e4f133c2ba74b431cd552e1805534daf4635c4a6..59b3b6c5bdd0b21be6e3f2d9b5c57839941d449a 100644
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diff --git a/.gradle/7.3.3/fileHashes/fileHashes.lock b/.gradle/7.3.3/fileHashes/fileHashes.lock
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diff --git a/.gradle/buildOutputCleanup/buildOutputCleanup.lock b/.gradle/buildOutputCleanup/buildOutputCleanup.lock
index 06248381ebfc9b73cdba19f7533d23771047cc86..ce5fe84d63582a702286fb0085293ecd4ba9a102 100644
GIT binary patch
literal 17
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diff --git a/app/src/main/java/com/example/android/marsphotos/overview/BindingAdapters.kt b/app/src/main/java/com/example/android/marsphotos/overview/BindingAdapters.kt
index b4e374e..4d86bb3 100644
--- a/app/src/main/java/com/example/android/marsphotos/overview/BindingAdapters.kt
+++ b/app/src/main/java/com/example/android/marsphotos/overview/BindingAdapters.kt
@@ -3,8 +3,10 @@ package com.example.android.marsphotos.overview
import android.widget.ImageView
import androidx.core.net.toUri
import androidx.databinding.BindingAdapter
+import androidx.recyclerview.widget.RecyclerView
import coil.load
import com.example.android.marsphotos.R
+import com.example.android.marsphotos.network.MarsPhoto
@BindingAdapter("imageUrl")
fun bindImage(imgView: ImageView, imgUrl: String?) {
@@ -17,6 +19,13 @@ fun bindImage(imgView: ImageView, imgUrl: String?) {
}
}
+@BindingAdapter("listData")
+fun bindRecyclerView(recyclerView: RecyclerView,
+ data: List<MarsPhoto>?) {
+ val adapter = recyclerView.adapter as PhotoGridAdapter
+ adapter.submitList(data)
+}
+
class BindingAdapters {
}
diff --git a/app/src/main/java/com/example/android/marsphotos/overview/OverviewFragment.kt b/app/src/main/java/com/example/android/marsphotos/overview/OverviewFragment.kt
index 9d0c465..f724968 100644
--- a/app/src/main/java/com/example/android/marsphotos/overview/OverviewFragment.kt
+++ b/app/src/main/java/com/example/android/marsphotos/overview/OverviewFragment.kt
@@ -37,9 +37,11 @@ class OverviewFragment : Fragment() {
* to enable Data Binding to observe LiveData, and sets up the RecyclerView with an adapter.
*/
override fun onCreateView(
+
inflater: LayoutInflater, container: ViewGroup?,
savedInstanceState: Bundle?
): View? {
+
val binding = FragmentOverviewBinding.inflate(inflater)
// val binding = GridViewItemBinding.inflate(inflater)
@@ -48,7 +50,7 @@ class OverviewFragment : Fragment() {
// Giving the binding access to the OverviewViewModel
binding.viewModel = viewModel
-
+ binding.photosGrid.adapter = PhotoGridAdapter()
return binding.root
}
}
diff --git a/app/src/main/java/com/example/android/marsphotos/overview/PhotoGridAdapter.kt b/app/src/main/java/com/example/android/marsphotos/overview/PhotoGridAdapter.kt
index b63d5f4..d0b18fd 100644
--- a/app/src/main/java/com/example/android/marsphotos/overview/PhotoGridAdapter.kt
+++ b/app/src/main/java/com/example/android/marsphotos/overview/PhotoGridAdapter.kt
@@ -8,28 +8,32 @@ import androidx.recyclerview.widget.RecyclerView
import com.example.android.marsphotos.databinding.GridViewItemBinding
import com.example.android.marsphotos.network.MarsPhoto
-class PhotoGridAdapter : ListAdapter<MarsPhoto,
- PhotoGridAdapter.MarsPhotoViewHolder>(MarsPhotoViewHolder) {
- class MarsPhotoViewHolder(private var binding:
- GridViewItemBinding
- ):
- RecyclerView.ViewHolder(binding.root) {
- fun bind(MarsPhoto: MarsPhoto) {
- binding.photo = MarsPhoto
+/**
+ * This class implements a [RecyclerView] [ListAdapter] which uses Data Binding to present [List]
+ * data, including computing diffs between lists.
+ */
+class PhotoGridAdapter :
+ ListAdapter<MarsPhoto, PhotoGridAdapter.MarsPhotosViewHolder>(DiffCallback) {
+
+ /**
+ * The MarsPhotosViewHolder constructor takes the binding variable from the associated
+ * GridViewItem, which nicely gives it access to the full [MarsPhoto] information.
+ */
+ class MarsPhotosViewHolder(
+ private var binding: GridViewItemBinding
+ ) : RecyclerView.ViewHolder(binding.root) {
+ fun bind(marsPhoto: MarsPhoto) {
+ binding.photo = marsPhoto
+ // This is important, because it forces the data binding to execute immediately,
+ // which allows the RecyclerView to make the correct view size measurements
binding.executePendingBindings()
}
}
- override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): PhotoGridAdapter.MarsPhotoViewHolder {
- return MarsPhotoViewHolder(GridViewItemBinding.inflate(
- LayoutInflater.from(parent.context)))
- }
-
- override fun onBindViewHolder(holder: PhotoGridAdapter.MarsPhotoViewHolder, position: Int) {
- val marsPhoto = getItem(position)
- holder.bind(marsPhoto)
- }
-
+ /**
+ * Allows the RecyclerView to determine which items have changed when the [List] of
+ * [MarsPhoto] has been updated.
+ */
companion object DiffCallback : DiffUtil.ItemCallback<MarsPhoto>() {
override fun areItemsTheSame(oldItem: MarsPhoto, newItem: MarsPhoto): Boolean {
return oldItem.id == newItem.id
@@ -39,4 +43,24 @@ class PhotoGridAdapter : ListAdapter<MarsPhoto,
return oldItem.imgSrcUrl == newItem.imgSrcUrl
}
}
+
+ /**
+ * Create new [RecyclerView] item views (invoked by the layout manager)
+ */
+ override fun onCreateViewHolder(
+ parent: ViewGroup,
+ viewType: Int
+ ): MarsPhotosViewHolder {
+ return MarsPhotosViewHolder(
+ GridViewItemBinding.inflate(LayoutInflater.from(parent.context))
+ )
+ }
+
+ /**
+ * Replaces the contents of a view (invoked by the layout manager)
+ */
+ override fun onBindViewHolder(holder: MarsPhotosViewHolder, position: Int) {
+ val marsPhoto = getItem(position)
+ holder.bind(marsPhoto)
+ }
}
\ No newline at end of file
diff --git a/app/src/main/res/layout/fragment_overview.xml b/app/src/main/res/layout/fragment_overview.xml
index 2521839..6688d39 100644
--- a/app/src/main/res/layout/fragment_overview.xml
+++ b/app/src/main/res/layout/fragment_overview.xml
@@ -35,6 +35,8 @@
android:layout_width="0dp"
android:layout_height="0dp"
android:padding="6dp"
+ app:listData="@{viewModel.photos}"
+ android:clipToPadding="false"
app:layoutManager=
"androidx.recyclerview.widget.GridLayoutManager"
app:layout_constraintBottom_toBottomOf="parent"
--
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