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

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(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)
        }
    }
}




    

    

Android拖放startDragAndDrop拖拽onDrawShadow静态添加xml布局View,Kotlin(4)_第1张图片

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

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