Android拖放startDragAndDrop拖拽onDrawShadow静态添加xml布局View，Kotlin（4）

import android.content.ClipData
import android.graphics.Canvas
import android.graphics.Point
import android.os.Bundle
import android.util.Log
import android.view.DragEvent
import android.view.LayoutInflater
import android.view.View
import android.view.View.OnDragListener
import android.view.View.OnLongClickListener
import android.widget.ImageView
import androidx.appcompat.app.AppCompatActivity


class MainActivity : AppCompatActivity() {
    private val TAG = "fly"

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        val imageView = findViewById<ImageView>(R.id.image)

        val shadow = LayoutInflater.from(this).inflate(R.layout.dnd, null)

        val builder = MyDragShadowBuilder(shadow)
        imageView.setOnLongClickListener(object : OnLongClickListener {
            //长按事件触发拖拽
            override fun onLongClick(v: View?): Boolean {
                val data = ClipData.newPlainText("name", "phil")
                imageView.startDragAndDrop(
                    data,
                    builder,
                    null,
                    0 or View.DRAG_FLAG_GLOBAL or View.DRAG_FLAG_OPAQUE
                )

                return true
            }
        })

        imageView.setOnDragListener(object : OnDragListener {
            override fun onDrag(v: View?, event: DragEvent?): Boolean {
                when (event?.action) {
                    DragEvent.ACTION_DRAG_STARTED -> { //拖放开始
                        Log.d(TAG, "ACTION_DRAG_STARTED")
                    }

                    DragEvent.ACTION_DRAG_ENTERED -> { //进入imageView
                        Log.d(TAG, "ACTION_DRAG_ENTERED")
                    }

                    DragEvent.ACTION_DRAG_ENDED -> { //拖放结束
                        Log.d(TAG, "ACTION_DRAG_ENDED")
                    }

                    DragEvent.ACTION_DRAG_EXITED -> { //离开imageView
                        Log.d(TAG, "ACTION_DRAG_EXITED")
                    }
                }

                return true
            }
        })
    }

    class MyDragShadowBuilder(private var mShadow: View) :
        View.DragShadowBuilder() {
        private val width: Int = 400
        private val height: Int = 400

        override fun onProvideShadowMetrics(outShadowSize: Point?, outShadowTouchPoint: Point?) {
            //拖动图像的宽和高
            outShadowSize?.set(width, height)

            //手指在拖动图像的位置 中点
            outShadowTouchPoint?.set(width / 2, height / 2)
        }

        override fun onDrawShadow(canvas: Canvas) {
            mShadow.measure(width, height)
            mShadow.layout(0, 0, width, height)
            mShadow.draw(canvas)
        }
    }
}

<?xml version="1.0" encoding="utf-8"?>
<androidx.cardview.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/card_view"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:cardBackgroundColor="@android:color/holo_green_light"
    app:cardCornerRadius="20dp"
    app:cardElevation="0dp">

    <ImageView
        android:id="@+id/image"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_gravity="center"
        android:scaleType="centerCrop"
        android:src="@android:drawable/stat_notify_error" />

    <TextView
        android:id="@+id/text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="top|right"
        android:layout_margin="10dp"
        android:background="@android:color/holo_blue_light"
        android:text="999"
        android:textColor="@android:color/holo_red_dark"
        android:textSize="15dp" />

</androidx.cardview.widget.CardView>

Android拖放startDragAndDrop拖拽onDrawShadow动态添加View，Kotlin（3）-CSDN博客文章浏览阅读161次。Android DynamicGrid：拖曳交换位置Android DynamicGrid是一个第三方开源项目，DynamicGrid在github上的项目主页是：https://github.com/askerov/DynamicGrid它实现在一个网格布局内，拖曳任意子view实现动态的交换位置，这很类似手机的桌面，手机桌面的图标，均可自由拖曳实现摆放位置的交换，如动图所示：_android 拖拽交换位置。Android View拖拽startDragAndDrop，Kotlin-CSDN博客。https://blog.csdn.net/zhangphil/article/details/134015999

Android View拖拽startDragAndDrop，Kotlin-CSDN博客一个Android手势缩放图片的工具类；Android DynamicGrid：拖曳交换位置Android DynamicGrid是一个第三方开源项目，DynamicGrid在github上的项目主页是：https://github.com/askerov/DynamicGrid它实现在一个网格布局内，拖曳任意子view实现动态的交换位置，这很类似手机的桌面，手机桌面的图标，均可自由拖曳实现摆放位置的交换，如动图所示：_android 拖拽交换位置。但是还有一些遗漏问题尚未解决：垂直方向的拖曳。https://blog.csdn.net/zhangphil/article/details/133994955