Sample of DropHelper

MainActivity.kt

/* Copyright 2021 Google LLC.	
   SPDX-License-Identifier: Apache-2.0 */
DropHelper.configureView(
    // Activity that will handle the drop
    this,
    // Target drop view to be highlighted
    outerDropTarget,
    // Supported MIME types
    arrayOf(MIMETYPE_TEXT_PLAIN, "image/*"),
    // Options for configuring drop targets
    DropHelper.Options.Builder()
        // To ensure proper drop target highlighting, all EditText elements in
        // the drop target view hierarchy must be included in a call to this
        // method. Otherwise, an EditText within the target, rather than the
        // target view itself, acquires focus during the drag and drop operation.
        .addInnerEditTexts(innerEditText)
        .build()
) { _, payload ->
  // Process the payload here, returning any content that should be delegated to
  // the platform.
  ...
}