Add Drop functionality #75
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| package com.android.developers.testing.repository | ||
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| import android.net.Uri | ||
| import androidx.activity.ComponentActivity | ||
| import androidx.compose.ui.draganddrop.DragAndDropEvent | ||
| import androidx.compose.ui.draganddrop.DragAndDropTarget | ||
| import com.android.developers.androidify.data.DropBehaviourFactory | ||
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| class FakeDropImageFactory : DropBehaviourFactory { | ||
| override fun shouldStartDragAndDrop(event: DragAndDropEvent): Boolean = true | ||
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| override fun createTargetCallback( | ||
| activity: ComponentActivity, | ||
| onImageDropped: (Uri) -> Unit, | ||
| onDropStarted: () -> Unit, | ||
| onDropEnded: () -> Unit, | ||
| ): DragAndDropTarget = object : DragAndDropTarget { | ||
| override fun onDrop(event: DragAndDropEvent): Boolean { | ||
| return false | ||
| } | ||
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| } | ||
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| } |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,86 @@ | ||
| package com.android.developers.androidify.data | ||
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| import android.graphics.BitmapFactory | ||
| import android.net.Uri | ||
| import androidx.activity.ComponentActivity | ||
| import androidx.compose.ui.draganddrop.DragAndDropEvent | ||
| import androidx.compose.ui.draganddrop.DragAndDropTarget | ||
| import androidx.compose.ui.draganddrop.mimeTypes | ||
| import androidx.compose.ui.draganddrop.toAndroidDragEvent | ||
| import androidx.lifecycle.lifecycleScope | ||
| import com.android.developers.androidify.util.LocalFileProvider | ||
| import kotlinx.coroutines.launch | ||
| import java.util.UUID | ||
| import javax.inject.Inject | ||
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| interface DropBehaviourFactory { | ||
| fun shouldStartDragAndDrop(event: DragAndDropEvent): Boolean | ||
| fun createTargetCallback( | ||
| activity: ComponentActivity, | ||
| onImageDropped: (Uri) -> Unit, | ||
| onDropStarted: () -> Unit = {}, | ||
| onDropEnded: () -> Unit = {}, | ||
| ): DragAndDropTarget | ||
| } | ||
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| class DropBehaviourFactoryImpl @Inject constructor(val localFileProvider: LocalFileProvider) : | ||
| DropBehaviourFactory { | ||
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| override fun shouldStartDragAndDrop(event: DragAndDropEvent): Boolean = | ||
| event.mimeTypes().contains("image/jpeg") | ||
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| override fun createTargetCallback( | ||
| activity: ComponentActivity, | ||
| onImageDropped: (Uri) -> Unit, | ||
| onDropStarted: () -> Unit, | ||
| onDropEnded: () -> Unit, | ||
| ) = | ||
| object : DragAndDropTarget { | ||
| override fun onStarted(event: DragAndDropEvent) { | ||
| super.onStarted(event) | ||
| onDropStarted() | ||
| } | ||
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| override fun onEnded(event: DragAndDropEvent) { | ||
| super.onEnded(event) | ||
| onDropEnded() | ||
| } | ||
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| /** | ||
| * Dropping an image requires the app to obtain the permission to use the image being | ||
| * dropped. This permission only lasts until the event is completed. The easiest way | ||
| * of being able to display the image being dropped is to temporarily copy it inside | ||
| * the app storage and use that copy for the processing. | ||
| */ | ||
| override fun onDrop(event: DragAndDropEvent): Boolean { | ||
| val targetEvent = event.toAndroidDragEvent() | ||
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| if (targetEvent.clipData.itemCount == 0) { | ||
| return false | ||
| } | ||
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| activity.lifecycleScope.launch { | ||
| val permission = activity.requestDragAndDropPermissions(targetEvent) | ||
| if (permission != null) { | ||
| try { | ||
| val inputUri = targetEvent.clipData.getItemAt(0).uri | ||
| activity.contentResolver.openInputStream(inputUri)?.use { inputStream -> | ||
| val bitmap = BitmapFactory.decodeStream(inputStream) | ||
|
There was a problem hiding this comment. Might make more sense to use LocalFileProvider here instead of |
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| bitmap?.let { | ||
| val cacheFile = | ||
| localFileProvider.createCacheFile("dropped_image_${UUID.randomUUID()}.jpg") | ||
| localFileProvider.saveBitmapToFile(bitmap, cacheFile) | ||
| onImageDropped(localFileProvider.sharingUriForFile(cacheFile)) | ||
| } | ||
| } | ||
| } finally { | ||
| permission.release() | ||
| } | ||
| } | ||
| } | ||
| return true | ||
| } | ||
| } | ||
| } | ||
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can we always assume it'll be at 0 index?