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Merge pull request #163 from android/dnd
Drag and Drop samples update
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101 changes: 101 additions & 0 deletions
101
...e/draganddrop/src/main/java/com/example/platform/ui/draganddrop/DragAndDropMultiWindow.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,101 @@ | ||
| /* | ||
| * 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.content.ClipDescription | ||
| import android.os.Build | ||
| import android.os.Bundle | ||
| import android.view.View | ||
| import android.widget.ImageView | ||
| import androidx.annotation.RequiresApi | ||
| import androidx.constraintlayout.widget.ConstraintSet | ||
| 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 com.bumptech.glide.Glide | ||
| import com.example.platform.ui.draganddrop.databinding.FragmentDndMultiwindowBinding | ||
| import com.google.android.catalog.framework.annotations.Sample | ||
|
|
||
| @Sample( | ||
| name = "Drag and Drop in MultiWindow mode", | ||
| description = "Drag and drop to another app visible in multiwindow mode", | ||
| documentation = "", | ||
| ) | ||
| class DragAndDropMultiWindow : Fragment(R.layout.fragment_dnd_multiwindow) { | ||
| lateinit var binding: FragmentDndMultiwindowBinding | ||
|
|
||
| @RequiresApi(Build.VERSION_CODES.N) | ||
| override fun onViewCreated(view: View, savedInstanceState: Bundle?) { | ||
| super.onViewCreated(view, savedInstanceState) | ||
| binding = FragmentDndMultiwindowBinding.bind(view) | ||
| ConstraintSet().clone(binding.root) | ||
| binding.tvGreeting.text = resources.getString(R.string.dnd_multiwindow_greeting) | ||
| binding.ivSource.tag = resources.getString(R.string.source_image_url) | ||
| Glide.with(this).asBitmap().load(resources.getString(R.string.source_image_url)) | ||
| .into(binding.ivSource) | ||
| Glide.with(this).asBitmap().load(resources.getString(R.string.target_image_url)) | ||
| .into(binding.ivTarget) | ||
| setupDrag(binding.ivSource) | ||
| setupDrop(binding.ivTarget) | ||
|
|
||
| } | ||
|
|
||
| @RequiresApi(Build.VERSION_CODES.N) | ||
| private fun setupDrag(draggableView: ImageView) { | ||
| DragStartHelper(draggableView) { view: View, _: DragStartHelper -> | ||
| val item = ClipData.Item(view.tag as? CharSequence) | ||
| val dragData = ClipData( | ||
| view.tag as? CharSequence, | ||
| arrayOf(ClipDescription.MIMETYPE_TEXT_PLAIN), | ||
| item, | ||
| ) | ||
| // Flag is required so that data from clipdata can be read by the drop target. | ||
| // view can directly specify the flags in this helper method. | ||
| val flags = View.DRAG_FLAG_GLOBAL or View.DRAG_FLAG_GLOBAL_URI_READ | ||
| view.startDragAndDrop( | ||
| dragData, | ||
| View.DragShadowBuilder(view), | ||
| null, | ||
| flags, | ||
| ) | ||
| }.attach() | ||
| } | ||
|
|
||
| private fun setupDrop(targetView: ImageView) { | ||
| /** | ||
| * DropHelper manages permission to read data across app, provided DRAG permission has been | ||
| * granted by drag source. No additional code is required as transient permission | ||
| * are granted and released | ||
| * Consider performing processing of [ClipData] in background if it is long-running | ||
| */ | ||
| DropHelper.configureView( | ||
| requireActivity(), | ||
| targetView, | ||
| arrayOf("text/*"), | ||
| ) { _, payload: ContentInfoCompat -> | ||
| val item = payload.clip.getItemAt(0) | ||
| val dragData = item.text | ||
| Glide.with(this).load(dragData).centerCrop().into(targetView) | ||
| val (_, remaining) = payload.partition { it == item } | ||
| remaining | ||
| } | ||
| } | ||
| } |
185 changes: 185 additions & 0 deletions
185
...c/main/java/com/example/platform/ui/draganddrop/DragAndDropRichContentReceiverFragment.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,185 @@ | ||
| /* | ||
| * 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 | ||
|
|
||
| //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 | ||
| } | ||
| } | ||
|
|
||
| @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) | ||
|
|
||
| binding.tvDrag.text = getString(R.string.dnd_helper_greeting) | ||
| addDragStartHelperForTextView(binding.tvDrag) | ||
|
|
||
| } | ||
|
|
||
| @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() | ||
| } | ||
|
|
||
| @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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