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Drag and Drop using Rich Content Receiver
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185 changes: 185 additions & 0 deletions
185
...c/main/java/com/example/platform/ui/draganddrop/DragAndDropRichContentReceiverFragment.kt
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| /* | ||
| * Copyright 2023 The Android Open Source Project | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * https://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
|
||
| package com.example.platform.ui.draganddrop | ||
|
|
||
| import android.content.ClipData | ||
| import android.graphics.Bitmap | ||
| import android.os.Build | ||
| import android.os.Bundle | ||
| import android.util.Log | ||
| import android.view.View | ||
| import android.widget.ImageView | ||
| import android.widget.TextView | ||
| import androidx.annotation.RequiresApi | ||
| import androidx.constraintlayout.widget.ConstraintSet | ||
| import androidx.core.content.ContextCompat | ||
| import androidx.core.content.FileProvider | ||
| import androidx.core.graphics.drawable.toBitmap | ||
| import androidx.core.util.component1 | ||
| import androidx.core.util.component2 | ||
| import androidx.core.view.ContentInfoCompat | ||
| import androidx.core.view.DragStartHelper | ||
| import androidx.draganddrop.DropHelper | ||
| import androidx.fragment.app.Fragment | ||
| import androidx.recyclerview.widget.LinearLayoutManager | ||
| import com.bumptech.glide.Glide | ||
| import com.example.platform.ui.draganddrop.databinding.FragmentDndRichcontentBinding | ||
| import com.google.android.catalog.framework.annotations.Sample | ||
| import java.io.ByteArrayOutputStream | ||
| import java.io.File | ||
| import java.io.FileOutputStream | ||
|
|
||
|
|
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| @Sample( | ||
| name = "Drag and Drop using the RichContentReceiver", | ||
| description = "Using RichContentReceiverInterface for implementing Drop for rich data types", | ||
| documentation = "https://developer.android.com/develop/ui/views/receive-rich-content", | ||
| ) | ||
| class DragAndDropRichContentReceiverFragment : Fragment(R.layout.fragment_dnd_richcontent) { | ||
| private val TAG = DragAndDropRichContentReceiverFragment::class.java.simpleName | ||
| private lateinit var binding: FragmentDndRichcontentBinding | ||
|
|
||
| @RequiresApi(Build.VERSION_CODES.S) | ||
| override fun onViewCreated(view: View, savedInstanceState: Bundle?) { | ||
| super.onViewCreated(view, savedInstanceState) | ||
| binding = FragmentDndRichcontentBinding.bind(view) | ||
| ConstraintSet().clone(binding.root) | ||
| val items = mutableListOf<GridItem>() | ||
| initViews(items) | ||
| initDrag() | ||
|
|
||
| // setOnReceiveContentListener accepts data from various input sources | ||
| // based on the type of view. | ||
| // here Target View is made to handle Drag and Drop Events | ||
| binding.rvDropTarget.setOnReceiveContentListener( | ||
| arrayOf("image/*", "text/*", "video/*"), | ||
| ) { _, payload -> | ||
| val (uriContent, remaining) = ContentInfoCompat.partition( | ||
| payload, | ||
| ) { item: ClipData.Item -> item.uri != null } | ||
|
|
||
| if (uriContent != null) { | ||
| val item = uriContent.clip.getItemAt(0) | ||
| item.uri?.let { uri -> | ||
| val size = 160.px | ||
| decodeSampledBitmapFromUri( | ||
| requireActivity().contentResolver, | ||
| uri, | ||
| size, | ||
| size, | ||
| )?.let { bitmap -> | ||
| items.add(GridItem("image/*", uri.toString())) | ||
| (binding.rvDropTarget.adapter as RichContentReceiverAdapter).notifyItemInserted( | ||
| items.size - 1, | ||
| ) | ||
| } | ||
| } ?: run { | ||
| Log.e(TAG, "Clip data is missing URI") | ||
| } | ||
| } | ||
| if (remaining != null) { | ||
| val item = remaining.clip.getItemAt(0) | ||
| items.add(GridItem("text/*", item.text.toString())) | ||
| (binding.rvDropTarget.adapter as RichContentReceiverAdapter).notifyItemInserted( | ||
| items.size - 1, | ||
| ) | ||
|
|
||
| } | ||
| null | ||
| } | ||
| } | ||
|
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| private fun initViews(items: MutableList<GridItem>) { | ||
| val layoutManager = LinearLayoutManager(requireContext()) | ||
| layoutManager.orientation = LinearLayoutManager.VERTICAL | ||
| binding.rvDropTarget.layoutManager = layoutManager | ||
| val adapter = RichContentReceiverAdapter(items) | ||
| binding.rvDropTarget.adapter = adapter | ||
|
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| //using DropHelper to define shadow for drop area | ||
| DropHelper.configureView( | ||
| requireActivity(), | ||
| binding.rvDropTarget, | ||
| arrayOf("image/*", "text/*", "video/*"), | ||
| DropHelper.Options.Builder() | ||
| .setHighlightColor(ContextCompat.getColor(requireContext(), R.color.purple_300)) | ||
| .setHighlightCornerRadiusPx(16.px).build(), | ||
| ) { _, payload: ContentInfoCompat -> | ||
| payload | ||
| } | ||
| } | ||
|
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| @RequiresApi(Build.VERSION_CODES.N) | ||
| fun initDrag() { | ||
| Glide.with(this).asBitmap().load(getString(R.string.target_image_url)) | ||
| .into(binding.ivSource1) | ||
| addDragStartHelperForImageView(binding.ivSource1) | ||
| Glide.with(this).asBitmap().load(getString(R.string.target_image_url1)) | ||
| .into(binding.ivSource) | ||
| addDragStartHelperForImageView(binding.ivSource) | ||
|
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| binding.tvDrag.text = getString(R.string.dnd_helper_greeting) | ||
| addDragStartHelperForTextView(binding.tvDrag) | ||
|
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| } | ||
|
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| @RequiresApi(Build.VERSION_CODES.N) | ||
| fun addDragStartHelperForTextView(draggbleView: View) { | ||
| DragStartHelper(draggbleView) { view: View, _: DragStartHelper -> | ||
| val dragData = ClipData.newPlainText("DraggedText", (view as TextView).text) | ||
| val flags = View.DRAG_FLAG_GLOBAL or View.DRAG_FLAG_GLOBAL_URI_READ | ||
| view.startDragAndDrop( | ||
| dragData, | ||
| View.DragShadowBuilder(view), | ||
| null, | ||
| flags, | ||
| ) | ||
| }.attach() | ||
| } | ||
|
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| @RequiresApi(Build.VERSION_CODES.N) | ||
| fun addDragStartHelperForImageView(draggableView: View) { | ||
| DragStartHelper(draggableView) { view: View, _: DragStartHelper -> | ||
| val filename = System.currentTimeMillis().toString() | ||
| val imageFile = File(File(requireActivity().filesDir, "images"), filename + ".png") | ||
| ByteArrayOutputStream().use { bos -> | ||
| (view as ImageView).drawable.toBitmap().compress(Bitmap.CompressFormat.PNG, 0, bos) | ||
| FileOutputStream(imageFile).use { fos -> | ||
| fos.write(bos.toByteArray()) | ||
| fos.flush() | ||
| } | ||
| } | ||
| val imageUri = FileProvider.getUriForFile( | ||
| requireContext(), | ||
| "${requireActivity().packageName}.draganddrop.provider", | ||
| imageFile, | ||
| ) | ||
| val dragData = ClipData.newUri( | ||
| requireActivity().contentResolver, | ||
| "Image", | ||
| imageUri, | ||
| ) | ||
| val flags = View.DRAG_FLAG_GLOBAL or View.DRAG_FLAG_GLOBAL_URI_READ | ||
| view.startDragAndDrop( | ||
| dragData, | ||
| View.DragShadowBuilder(view), | ||
| null, | ||
| flags, | ||
| ) | ||
| }.attach() | ||
| } | ||
| } |
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60 changes: 60 additions & 0 deletions
60
...aganddrop/src/main/java/com/example/platform/ui/draganddrop/RichContentReceiverAdapter.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,60 @@ | ||
| /* | ||
| * Copyright 2023 The Android Open Source Project | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * https://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
|
||
| package com.example.platform.ui.draganddrop | ||
|
|
||
| import android.view.LayoutInflater | ||
| import android.view.ViewGroup | ||
| import androidx.recyclerview.widget.RecyclerView | ||
| import androidx.recyclerview.widget.RecyclerView.VISIBLE | ||
| import androidx.recyclerview.widget.RecyclerView.ViewHolder | ||
| import com.bumptech.glide.Glide | ||
| import com.example.platform.ui.draganddrop.databinding.GridItemBinding | ||
|
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| class RichContentReceiverAdapter(private val items: List<GridItem>) : | ||
| RecyclerView.Adapter<RichContentReceiverAdapter.DroppedItem>() { | ||
| inner class DroppedItem(val binding: GridItemBinding) : ViewHolder(binding.root) | ||
|
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| override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): DroppedItem { | ||
| val binding = GridItemBinding.inflate(LayoutInflater.from(parent.context), parent, false) | ||
| return DroppedItem(binding) | ||
| } | ||
|
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| override fun getItemCount(): Int { | ||
| return items.size | ||
| } | ||
|
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| override fun onBindViewHolder(holder: DroppedItem, position: Int) { | ||
| with(holder) { | ||
| binding.droppedText.text = position.toString() | ||
|
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| when (items[position].mimeType) { | ||
| "image/*" -> { | ||
| Glide.with(itemView.context).asBitmap().load(items[position].value) | ||
| .into(binding.ivDroppedImage) | ||
| binding.ivDroppedImage.visibility = VISIBLE | ||
| } | ||
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| "text/*" -> { | ||
| binding.droppedText.text = items[position].value | ||
| binding.droppedText.visibility = VISIBLE | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| data class GridItem(val mimeType: String, val value: String) |
99 changes: 99 additions & 0 deletions
99
samples/user-interface/draganddrop/src/main/res/layout/fragment_dnd_richcontent.xml
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|---|---|---|
| @@ -0,0 +1,99 @@ | ||
| <?xml version="1.0" encoding="utf-8"?><!-- | ||
| ~ Copyright 2023 The Android Open Source Project | ||
| ~ | ||
| ~ Licensed under the Apache License, Version 2.0 (the "License"); | ||
| ~ you may not use this file except in compliance with the License. | ||
| ~ You may obtain a copy of the License at | ||
| ~ | ||
| ~ https://www.apache.org/licenses/LICENSE-2.0 | ||
| ~ | ||
| ~ Unless required by applicable law or agreed to in writing, software | ||
| ~ distributed under the License is distributed on an "AS IS" BASIS, | ||
| ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| ~ See the License for the specific language governing permissions and | ||
| ~ limitations under the License. | ||
| --> | ||
|
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| <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" | ||
| xmlns:app="http://schemas.android.com/apk/res-auto" | ||
| android:layout_width="match_parent" | ||
| android:layout_height="match_parent" | ||
| android:layout_margin="8dp"> | ||
|
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| <androidx.recyclerview.widget.RecyclerView | ||
| android:id="@+id/rv_drop_target" | ||
| android:layout_width="match_parent" | ||
| android:layout_height="0dp" | ||
| android:layout_margin="20dp" | ||
| app:layout_constraintBottom_toBottomOf="parent" | ||
| app:layout_constraintLeft_toLeftOf="parent" | ||
| app:layout_constraintRight_toRightOf="parent" | ||
| app:layout_constraintTop_toTopOf="@+id/guideline" /> | ||
|
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| <View | ||
| android:id="@+id/divider" | ||
| android:layout_width="match_parent" | ||
| android:layout_height="2dp" | ||
| android:background="@color/cardview_shadow_start_color" | ||
| app:layout_constraintBottom_toTopOf="@id/guideline" | ||
| app:layout_constraintLeft_toLeftOf="parent" | ||
| app:layout_constraintRight_toRightOf="parent" | ||
| app:layout_constraintTop_toBottomOf="@id/drag_source" /> | ||
|
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| <androidx.constraintlayout.widget.Guideline | ||
| android:id="@+id/guideline" | ||
| android:layout_width="wrap_content" | ||
| android:layout_height="wrap_content" | ||
| android:orientation="horizontal" | ||
| app:layout_constraintGuide_percent="0.3" /> | ||
|
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| <androidx.constraintlayout.widget.ConstraintLayout | ||
| android:id="@+id/drag_source" | ||
| android:layout_width="match_parent" | ||
| android:layout_height="0dp" | ||
| app:layout_constraintBottom_toTopOf="@id/divider" | ||
| app:layout_constraintLeft_toLeftOf="parent" | ||
| app:layout_constraintRight_toRightOf="parent" | ||
| app:layout_constraintTop_toTopOf="parent"> | ||
|
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| <ImageView | ||
| android:id="@+id/iv_source" | ||
| android:layout_width="128dp" | ||
| android:layout_height="wrap_content" | ||
| android:contentDescription="@string/drag_image" | ||
| app:layout_constraintBottom_toTopOf="@id/iv_source_1" | ||
| app:layout_constraintLeft_toLeftOf="parent" | ||
| app:layout_constraintRight_toLeftOf="@id/tv_drag" | ||
| app:layout_constraintTop_toTopOf="parent" /> | ||
|
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| <ImageView | ||
| android:id="@+id/iv_source_1" | ||
| android:layout_width="128dp" | ||
| android:layout_height="wrap_content" | ||
| android:contentDescription="@string/drag_image" | ||
| app:layout_constraintBottom_toBottomOf="parent" | ||
| app:layout_constraintLeft_toLeftOf="parent" | ||
| app:layout_constraintRight_toLeftOf="@id/ed_drag" | ||
| app:layout_constraintTop_toBottomOf="@id/iv_source" /> | ||
|
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| <EditText | ||
| android:id="@+id/ed_drag" | ||
| android:layout_width="wrap_content" | ||
| android:layout_height="wrap_content" | ||
| android:hint="@string/editable_drag_text" | ||
| app:layout_constraintBottom_toBottomOf="parent" | ||
| app:layout_constraintLeft_toRightOf="@id/iv_source_1" | ||
| app:layout_constraintRight_toRightOf="parent" | ||
| app:layout_constraintTop_toBottomOf="@id/tv_drag" | ||
| android:inputType="text"/> | ||
|
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| <TextView | ||
| android:id="@+id/tv_drag" | ||
| android:layout_width="128dp" | ||
| android:layout_height="wrap_content" | ||
| app:layout_constraintBottom_toTopOf="@id/ed_drag" | ||
| app:layout_constraintLeft_toRightOf="@id/iv_source" | ||
| app:layout_constraintRight_toRightOf="parent" | ||
| app:layout_constraintTop_toTopOf="parent" /> | ||
| </androidx.constraintlayout.widget.ConstraintLayout> | ||
| </androidx.constraintlayout.widget.ConstraintLayout> |
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