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208 changes: 208 additions & 0 deletions
208
app/src/main/java/com/mikepenz/fastadapter/app/DragAndDropActivity.kt
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| Original file line number | Diff line number | Diff line change |
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| package com.mikepenz.fastadapter.app | ||
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| import android.os.Bundle | ||
| import android.view.MenuItem | ||
| import android.view.View | ||
| import android.widget.Toast | ||
| import androidx.appcompat.app.AppCompatActivity | ||
| import androidx.core.content.res.ResourcesCompat | ||
| import androidx.recyclerview.widget.DefaultItemAnimator | ||
| import androidx.recyclerview.widget.ItemTouchHelper | ||
| import androidx.recyclerview.widget.LinearLayoutManager | ||
| import androidx.recyclerview.widget.RecyclerView | ||
| import com.mikepenz.fastadapter.FastAdapter | ||
| import com.mikepenz.fastadapter.GenericItem | ||
| import com.mikepenz.fastadapter.IAdapter | ||
| import com.mikepenz.fastadapter.adapters.ItemAdapter | ||
| import com.mikepenz.fastadapter.adapters.ItemAdapter.Companion.items | ||
| import com.mikepenz.fastadapter.app.databinding.ActivitySampleBinding | ||
| import com.mikepenz.fastadapter.app.items.DragHandleTouchEvent | ||
| import com.mikepenz.fastadapter.app.items.DraggableSingleLineItem | ||
| import com.mikepenz.fastadapter.app.items.SectionHeaderItem | ||
| import com.mikepenz.fastadapter.app.items.SmallIconSingleLineItem | ||
| import com.mikepenz.fastadapter.app.view.DraggableFrameLayout | ||
| import com.mikepenz.fastadapter.app.view.RecyclerViewBackgroundDrawable | ||
| import com.mikepenz.fastadapter.drag.ItemTouchCallback | ||
| import com.mikepenz.fastadapter.drag.SimpleDragCallback | ||
| import com.mikepenz.fastadapter.utils.DragDropUtil | ||
| import com.mikepenz.iconics.IconicsDrawable | ||
| import com.mikepenz.iconics.typeface.library.materialdesigniconic.MaterialDesignIconic | ||
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| private const val STATE_LIST_ORDER = "com.mikepenz.fastadapter.app.LIST_ORDER" | ||
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| class DragAndDropActivity : AppCompatActivity(), ItemTouchCallback { | ||
| private lateinit var binding: ActivitySampleBinding | ||
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| private lateinit var fastAdapter: FastAdapter<GenericItem> | ||
| private lateinit var itemAdapter: ItemAdapter<GenericItem> | ||
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| private lateinit var touchCallback: SimpleDragCallback | ||
| private lateinit var touchHelper: ItemTouchHelper | ||
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| override fun onCreate(savedInstanceState: Bundle?) { | ||
| super.onCreate(savedInstanceState) | ||
| binding = ActivitySampleBinding.inflate(layoutInflater).also { | ||
| setContentView(it.root) | ||
| } | ||
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| setSupportActionBar(binding.toolbar) | ||
| supportActionBar?.setDisplayHomeAsUpEnabled(true) | ||
| supportActionBar?.setHomeButtonEnabled(false) | ||
|
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| // Create empty ItemAdapter | ||
| itemAdapter = items() | ||
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| // Create FastAdapter instance that will manage the whole list | ||
| fastAdapter = FastAdapter.with(itemAdapter).apply { | ||
| // Add an event hook that manages touching the drag handle | ||
| addEventHook( | ||
| DragHandleTouchEvent { position -> | ||
| binding.rv.findViewHolderForAdapterPosition(position)?.let { viewHolder -> | ||
| // Start dragging | ||
| touchHelper.startDrag(viewHolder) | ||
| } | ||
| } | ||
| ) | ||
| } | ||
|
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| // Handle clicks on our list items | ||
| fastAdapter.onClickListener = { v: View?, _: IAdapter<GenericItem>, item: GenericItem, _: Int -> | ||
| if (v != null) { | ||
| // Perform an action depending on the type of the item | ||
| val message = when (item) { | ||
| is SmallIconSingleLineItem -> item.name.getText(v.context) | ||
| is DraggableSingleLineItem -> item.name.getText(v.context) | ||
| is SectionHeaderItem -> null | ||
| else -> "Unknown item type: $item" | ||
| } | ||
| if (message != null) { | ||
| Toast.makeText(v.context, message, Toast.LENGTH_SHORT).show() | ||
| } | ||
| } | ||
| false | ||
| } | ||
|
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| // Set up our RecyclerView | ||
| binding.rv.layoutManager = LinearLayoutManager(this) | ||
| binding.rv.itemAnimator = DefaultItemAnimator() | ||
| binding.rv.adapter = fastAdapter | ||
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| // Set a custom background on the RecyclerView. It avoids filling the area without list items at the bottom of | ||
| // the RecyclerView with our background color. | ||
| val recyclerViewBackgroundColor = ResourcesCompat.getColor(resources, R.color.behindRecyclerView, theme) | ||
| RecyclerViewBackgroundDrawable(recyclerViewBackgroundColor).attachTo(binding.rv) | ||
|
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| // Create our list and set it on the adapter | ||
| val items = buildSampleItemList(savedInstanceState) | ||
| itemAdapter.add(items) | ||
|
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| // Add drag and drop functionality to the RecyclerView | ||
| touchCallback = SimpleDragCallback(itemTouchCallback = this).apply { | ||
| // Disable drag & drop on long-press | ||
| isDragEnabled = false | ||
| } | ||
| touchHelper = ItemTouchHelper(touchCallback) | ||
| touchHelper.attachToRecyclerView(binding.rv) | ||
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| // Restore the adapter state (this has to be done after adding the items) | ||
| fastAdapter.withSavedInstanceState(savedInstanceState) | ||
| } | ||
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| private fun buildSampleItemList(savedInstanceState: Bundle?): ArrayList<GenericItem> { | ||
| val items = ArrayList<GenericItem>() | ||
| items.add( | ||
| SmallIconSingleLineItem( | ||
| IconicsDrawable(this, MaterialDesignIconic.Icon.gmi_settings), | ||
| getString(R.string.list_item_general_settings) | ||
| ) | ||
| ) | ||
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| items.add(SectionHeaderItem(getString(R.string.list_item_accounts_section))) | ||
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| val accountIcon = IconicsDrawable(this, MaterialDesignIconic.Icon.gmi_account) | ||
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| val accountItems = (1..5).map { i -> | ||
| val name = getString(R.string.list_item_account, i) | ||
| DraggableSingleLineItem(accountIcon, name).apply { | ||
| identifier = (100 + i).toLong() | ||
| } | ||
| } | ||
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| // Use the saved state (if available) to sort the list of accounts | ||
| val sortedAccountItems = if (savedInstanceState != null) { | ||
| val listOrder = savedInstanceState.getLongArray(STATE_LIST_ORDER) ?: error("Missing saved state") | ||
| val orderById = listOrder.withIndex().associate { it.value to it.index } | ||
| accountItems.sortedBy { orderById[it.identifier] } | ||
| } else { | ||
| accountItems | ||
| } | ||
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| items.addAll(sortedAccountItems) | ||
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| items.add(SectionHeaderItem(getString(R.string.list_item_misc_section))) | ||
| items.add(SmallIconSingleLineItem( | ||
| IconicsDrawable(this, MaterialDesignIconic.Icon.gmi_info), | ||
| getString(R.string.list_item_about) | ||
| )) | ||
| items.add( | ||
| SmallIconSingleLineItem( | ||
| IconicsDrawable(this, MaterialDesignIconic.Icon.gmi_code), | ||
| getString(R.string.list_item_licenses) | ||
| ) | ||
| ) | ||
| return items | ||
| } | ||
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| override fun onSaveInstanceState(outState: Bundle) { | ||
| // Save the adapter's state | ||
| val newOutState = fastAdapter.saveInstanceState(outState) | ||
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| // Save the current account order | ||
| val itemIdentifiers = itemAdapter.adapterItems | ||
| .filterIsInstance<DraggableSingleLineItem>() | ||
| .map { it.identifier } | ||
| .toLongArray() | ||
| newOutState.putLongArray(STATE_LIST_ORDER, itemIdentifiers) | ||
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| super.onSaveInstanceState(newOutState) | ||
| } | ||
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| override fun onOptionsItemSelected(item: MenuItem): Boolean { | ||
| return when (item.itemId) { | ||
| android.R.id.home -> { | ||
| onBackPressed() | ||
| true | ||
| } | ||
| else -> super.onOptionsItemSelected(item) | ||
| } | ||
| } | ||
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| override fun itemTouchStartDrag(viewHolder: RecyclerView.ViewHolder) { | ||
| // Add visual highlight to the dragged item | ||
| (viewHolder.itemView as DraggableFrameLayout).isDragged = true | ||
| } | ||
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| override fun itemTouchStopDrag(viewHolder: RecyclerView.ViewHolder) { | ||
| // Remove visual highlight from the dropped item | ||
| (viewHolder.itemView as DraggableFrameLayout).isDragged = false | ||
| } | ||
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| override fun itemTouchOnMove(oldPosition: Int, newPosition: Int): Boolean { | ||
| // Determine the "drop area" | ||
| val firstDropPosition = itemAdapter.adapterItems.indexOfFirst { it is DraggableSingleLineItem } | ||
| val lastDropPosition = itemAdapter.adapterItems.indexOfLast { it is DraggableSingleLineItem } | ||
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| // Only move the item if the new position is inside the "drop area" | ||
| return if (newPosition in firstDropPosition..lastDropPosition) { | ||
| // Change the item's position in the adapter | ||
| DragDropUtil.onMove(itemAdapter, oldPosition, newPosition) | ||
| true | ||
| } else { | ||
| false | ||
| } | ||
| } | ||
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| override fun itemTouchDropped(oldPosition: Int, newPosition: Int) { | ||
| // Save the new item order, e.g. in your database | ||
| } | ||
| } |
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69 changes: 69 additions & 0 deletions
69
app/src/main/java/com/mikepenz/fastadapter/app/items/DraggableSingleLineItem.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,69 @@ | ||
| package com.mikepenz.fastadapter.app.items | ||
|
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| import android.graphics.drawable.Drawable | ||
| import android.view.MotionEvent | ||
| import android.view.View | ||
| import android.widget.ImageView | ||
| import android.widget.TextView | ||
| import androidx.recyclerview.widget.RecyclerView | ||
| import com.mikepenz.fastadapter.FastAdapter | ||
| import com.mikepenz.fastadapter.app.R | ||
| import com.mikepenz.fastadapter.drag.IDraggable | ||
| import com.mikepenz.fastadapter.items.AbstractItem | ||
| import com.mikepenz.fastadapter.listeners.TouchEventHook | ||
| import com.mikepenz.fastadapter.ui.utils.ImageHolder | ||
| import com.mikepenz.fastadapter.ui.utils.StringHolder | ||
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| class DraggableSingleLineItem(icon: Drawable, name: String) : AbstractItem<DraggableSingleLineItem.ViewHolder>(), IDraggable { | ||
| val icon: ImageHolder = ImageHolder(icon) | ||
| val name: StringHolder = StringHolder(name) | ||
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| override val isDraggable: Boolean = true | ||
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| override val type: Int | ||
| get() = R.id.fastadapter_draggable_single_line_item | ||
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| override val layoutRes: Int | ||
| get() = R.layout.draggable_single_line_item | ||
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| override fun bindView(holder: ViewHolder, payloads: List<Any>) { | ||
| super.bindView(holder, payloads) | ||
| ImageHolder.applyToOrSetGone(icon, holder.icon) | ||
| name.applyTo(holder.name) | ||
| } | ||
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| override fun unbindView(holder: ViewHolder) { | ||
| holder.icon.setImageDrawable(null) | ||
| holder.name.text = null | ||
| } | ||
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| override fun getViewHolder(v: View): ViewHolder = ViewHolder(v) | ||
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| class ViewHolder(view: View) : RecyclerView.ViewHolder(view) { | ||
| var icon: ImageView = view.findViewById(R.id.icon) | ||
| var name: TextView = view.findViewById(R.id.name) | ||
| var dragHandle: View = view.findViewById(R.id.drag_handle) | ||
| } | ||
| } | ||
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| class DragHandleTouchEvent(val action: (position: Int) -> Unit) : TouchEventHook<DraggableSingleLineItem>() { | ||
| override fun onBind(viewHolder: RecyclerView.ViewHolder): View? { | ||
| return if (viewHolder is DraggableSingleLineItem.ViewHolder) viewHolder.dragHandle else null | ||
| } | ||
|
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| override fun onTouch( | ||
| v: View, | ||
| event: MotionEvent, | ||
| position: Int, | ||
| fastAdapter: FastAdapter<DraggableSingleLineItem>, | ||
| item: DraggableSingleLineItem | ||
| ): Boolean { | ||
| return if (event.action == MotionEvent.ACTION_DOWN) { | ||
| action(position) | ||
| true | ||
| } else { | ||
| false | ||
| } | ||
| } | ||
| } | ||
|
|
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