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Merge pull request #170 from android/dnd-view
Drag and Drop using views
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142 changes: 142 additions & 0 deletions
142
...ace/draganddrop/src/main/java/com/example/platform/ui/draganddrop/DragAndDropWithViews.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,142 @@ | ||
| /* | ||
| * 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 | ||
|
|
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| import android.content.ClipData | ||
| import android.content.ClipDescription | ||
| import android.os.Build | ||
| import android.os.Bundle | ||
| import android.util.Log | ||
| import android.view.DragEvent | ||
| import android.view.View | ||
| import android.widget.ImageView | ||
| import android.widget.Toast | ||
| import androidx.annotation.RequiresApi | ||
| import androidx.constraintlayout.widget.ConstraintSet | ||
| import androidx.fragment.app.Fragment | ||
| import com.bumptech.glide.Glide | ||
| import com.example.platform.ui.draganddrop.databinding.FragmentDragAndDropWithViewsBinding | ||
| import com.google.android.catalog.framework.annotations.Sample | ||
|
|
||
| @Sample( | ||
| name = "Drag and Drop using views", | ||
| description = "Drag and Drop using the views", | ||
| documentation = "https://developer.android.com/develop/ui/views/touch-and-input/drag-drop/view", | ||
| ) | ||
| class DragAndDropWithViews : Fragment(R.layout.fragment_drag_and_drop_with_views) { | ||
|
|
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| val TAG = "DragAndDropWithViews" | ||
| private lateinit var binding: FragmentDragAndDropWithViewsBinding | ||
|
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| @RequiresApi(Build.VERSION_CODES.N) | ||
| override fun onViewCreated(view: View, savedInstanceState: Bundle?) { | ||
| super.onViewCreated(view, savedInstanceState) | ||
| binding = FragmentDragAndDropWithViewsBinding.bind(view) | ||
| ConstraintSet().clone(binding.root) | ||
|
|
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| binding.tvGreeting.text = getString(R.string.view_greeting) | ||
| binding.ivSource.tag = getString(R.string.views_source_image_url) | ||
| Glide.with(this).asBitmap().load(getString(R.string.views_source_image_url)) | ||
| .into(binding.ivSource) | ||
| Glide.with(this).asBitmap().load(getString(R.string.views_target_image_url)) | ||
| .into(binding.ivTarget) | ||
| setupDrag(binding.ivSource) | ||
| setupDrop(binding.ivTarget) | ||
| // resetting the to state before drag | ||
| binding.btnReset.setOnClickListener { | ||
| Glide.with(this).asBitmap().load(getString(R.string.views_target_image_url)) | ||
| .into(binding.ivTarget) | ||
| } | ||
| } | ||
|
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| @RequiresApi(Build.VERSION_CODES.N) | ||
| private fun setupDrag(draggableView: ImageView) { | ||
| draggableView.setOnLongClickListener { v -> | ||
| val label = "Dragged Image Url" | ||
| val clipItem = ClipData.Item(v.tag as? CharSequence) | ||
| val mimeTypes = arrayOf(ClipDescription.MIMETYPE_TEXT_PLAIN) | ||
| val draggedData = ClipData( | ||
| label, mimeTypes, clipItem | ||
| ) | ||
| v.startDragAndDrop( | ||
| draggedData, | ||
| View.DragShadowBuilder(v), | ||
| null, | ||
| View.DRAG_FLAG_GLOBAL or View.DRAG_FLAG_GLOBAL_URI_READ | ||
| ) | ||
| } | ||
| } | ||
|
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| @RequiresApi(Build.VERSION_CODES.N) | ||
| private fun setupDrop(dropTarget: ImageView) { | ||
| dropTarget.setOnDragListener { v, event -> | ||
| when (event.action) { | ||
| DragEvent.ACTION_DRAG_STARTED -> { | ||
| Log.d(TAG, "ON DRAG STARTED") | ||
| if (event.clipDescription.hasMimeType(ClipDescription.MIMETYPE_TEXT_PLAIN)) { | ||
| (v as? ImageView)?.alpha = 0.5F | ||
| v.invalidate() | ||
| true | ||
| } else { | ||
| false | ||
| } | ||
| } | ||
|
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| DragEvent.ACTION_DRAG_ENTERED -> { | ||
| Log.d(TAG, "ON DRAG ENTERED") | ||
| (v as? ImageView)?.alpha = 0.3F | ||
| v.invalidate() | ||
| true | ||
| } | ||
|
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| DragEvent.ACTION_DRAG_LOCATION -> { | ||
| Log.d(TAG, "On DRAG LOCATION") | ||
| true | ||
| } | ||
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| DragEvent.ACTION_DRAG_ENDED -> { | ||
| Log.d(TAG, "ON DRAG ENDED") | ||
| (v as? ImageView)?.alpha = 1.0F | ||
| true | ||
| } | ||
|
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| DragEvent.ACTION_DRAG_EXITED -> { | ||
| Log.d(TAG, "ON DRAG EXISITED") | ||
| (v as? ImageView)?.alpha = 0.5F | ||
| v.invalidate() | ||
| true | ||
| } | ||
|
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| DragEvent.ACTION_DROP -> { | ||
| Log.d(TAG, "On DROP") | ||
| val dropPermission = requireActivity().requestDragAndDropPermissions(event) | ||
| val item: ClipData.Item = event.clipData.getItemAt(0) | ||
| val dragData = item.text | ||
| Toast.makeText(requireContext(), "Dragged Data ${dragData}", Toast.LENGTH_SHORT).show() | ||
| Glide.with(this).load(item.text).into(v as ImageView) | ||
| (v as? ImageView)?.alpha = 1.0F | ||
| dropPermission.release() | ||
| true | ||
| } | ||
|
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| else -> { | ||
| false | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } |
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62 changes: 62 additions & 0 deletions
62
samples/user-interface/draganddrop/src/main/res/layout/fragment_drag_and_drop_with_views.xml
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,62 @@ | ||
| <?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"> | ||
|
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| <TextView | ||
| android:id="@+id/tv_greeting" | ||
| android:layout_width="wrap_content" | ||
| android:layout_height="wrap_content" | ||
| app:layout_constraintBottom_toTopOf="@id/btn_reset" | ||
| app:layout_constraintLeft_toLeftOf="parent" | ||
| app:layout_constraintRight_toRightOf="parent" | ||
| app:layout_constraintTop_toTopOf="parent" /> | ||
|
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| <Button | ||
| android:id="@+id/btn_reset" | ||
| android:layout_width="wrap_content" | ||
| android:layout_height="wrap_content" | ||
| android:text="@string/reset_btn_text" | ||
| app:layout_constraintBottom_toTopOf="@id/iv_source" | ||
| app:layout_constraintLeft_toLeftOf="parent" | ||
| app:layout_constraintRight_toRightOf="parent" | ||
| app:layout_constraintTop_toBottomOf="@id/tv_greeting" /> | ||
|
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| <ImageView | ||
| android:id="@+id/iv_source" | ||
| android:layout_width="match_parent" | ||
| android:layout_height="wrap_content" | ||
| android:contentDescription="@string/source_image" | ||
| app:layout_constraintBottom_toTopOf="@id/iv_target" | ||
| app:layout_constraintLeft_toLeftOf="parent" | ||
| app:layout_constraintRight_toRightOf="parent" | ||
| app:layout_constraintTop_toBottomOf="@id/btn_reset" /> | ||
|
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| <ImageView | ||
| android:id="@+id/iv_target" | ||
| android:layout_width="match_parent" | ||
| android:layout_height="wrap_content" | ||
| android:contentDescription="@string/target_image" | ||
| app:layout_constraintBottom_toBottomOf="parent" | ||
| app:layout_constraintLeft_toLeftOf="parent" | ||
| app:layout_constraintRight_toRightOf="parent" | ||
| app:layout_constraintTop_toBottomOf="@id/iv_source" /> | ||
|
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|
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| </androidx.constraintlayout.widget.ConstraintLayout> |
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