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@@ -1,644 +0,0 @@
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-package com.pan_american.android.ui.picture_preview
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-
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-import android.annotation.SuppressLint
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-import android.graphics.Matrix
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-import android.graphics.PointF
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-import android.graphics.RectF
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-import android.os.Bundle
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-import android.view.GestureDetector
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-import android.view.GestureDetector.OnDoubleTapListener
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-import android.view.MotionEvent
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-import android.view.ViewTreeObserver
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-import android.widget.ImageView
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-import androidx.appcompat.widget.AppCompatImageView
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-import com.pan_american.android.OASystem
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-import com.pan_american.android.R
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-import com.pan_american.android.base.BaseActivity
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-import com.pan_american.android.databinding.ActivityPicturePreviewBinding
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-import com.pan_american.android.databinding.LayoutTitleBinding
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-import com.squareup.picasso.Callback
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-import com.squareup.picasso.Picasso
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-import kotlin.math.atan2
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-import kotlin.math.sqrt
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-
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-class PicturePreviewActivity : BaseActivity<ActivityPicturePreviewBinding>() {
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-
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- companion object {
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- const val NONE = 0
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- const val DRAG = 1
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- const val ZOOM = 2
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- }
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-
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- private var fromServer = false
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-
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- private var uri = ""
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-
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- private var url = ""
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-
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- private var picName = ""
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-
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- private lateinit var imageView: AppCompatImageView
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-
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- private lateinit var gestureDetector: GestureDetector
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-
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- private val pointF = PointF()
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-
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- private val matrix = Matrix()
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-
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- private val tempMatrix = Matrix()
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-
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- private val savedMatrix = Matrix()
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-
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- //双击放大还是缩小
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- private var isZoomIn = false
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-
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- private var mode = 0
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-
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- private var xDown = 0F
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-
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- private var yDown = 0F
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-
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- private var oldDist = 0F
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-
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- private var oldRotation = 0F
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-
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- private var rotation = 0F //旋转角度差值
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-
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- private var newRotation = 0F
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-
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- private var resetScale = 1F
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-
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- private var currScale = 1F
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-
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- private var widthScreen = 0
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-
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- private var heightScreen = 0
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-
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- private var isCheckTopAndBottom = false
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-
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- private var isCheckRightAndLeft = false
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-
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- private lateinit var titleBinding: LayoutTitleBinding
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-
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- override fun getViewBinding() = ActivityPicturePreviewBinding.inflate(layoutInflater)
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-
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- override fun onCreate(savedInstanceState: Bundle?) {
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- super.onCreate(savedInstanceState)
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-
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- intent.apply {
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-
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- fromServer = getBooleanExtra("fromServer", false)
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- picName = getStringExtra("name").toString()
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-
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- if (fromServer) {
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- url = getStringExtra("url").toString()
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- } else {
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- uri = getStringExtra("uri").toString()
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- }
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-
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- }
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-
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- imageView = binding.imageView
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-
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- initTitle()
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- initViews()
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- initEvents()
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- }
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-
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- override fun initTitle() {
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- titleBinding = LayoutTitleBinding.bind(binding.root).apply {
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- titleText.text = resources.getString(R.string.picture_preview)
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-
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- backButton.setOnClickListener {
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- back()
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- }
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- }
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- }
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-
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- @SuppressLint("ClickableViewAccessibility")
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- override fun initViews() {
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-
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-// binding.imageName.text = picName
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-
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- imageView.viewTreeObserver.addOnGlobalLayoutListener(object : ViewTreeObserver.OnGlobalLayoutListener {
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- override fun onGlobalLayout() {
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- imageView.viewTreeObserver.removeOnGlobalLayoutListener(this)
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-
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- //获取imageView的宽和高
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- // 此时可以安全地获取ImageView的尺寸并设置图片
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- widthScreen = imageView.width
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- heightScreen = imageView.height
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-
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- if (fromServer) {
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- Picasso.get().load(url).resize(widthScreen, heightScreen).centerInside().into(imageView, object : Callback {
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- override fun onSuccess() {
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-
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- imageView.scaleType = ImageView.ScaleType.MATRIX
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-
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- //初始化图片的矩阵
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- matrix.set(imageView.imageMatrix)
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-
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- /**
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- * 初始化 将图片放在屏幕中心位置
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- */
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- center()
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-
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- /**
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- * 图片设置中心之后，重新设置图片的缩放矩阵
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- */
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- imageView.imageMatrix = matrix
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- }
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-
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- override fun onError(p0: Exception?) {
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- showErrorInfo(R.string.picture_load_error)
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- }
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- })
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- } else {
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- Picasso.get().load(uri).resize(widthScreen, heightScreen).centerInside().into(imageView, object : Callback {
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- override fun onSuccess() {
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- imageView.scaleType = ImageView.ScaleType.MATRIX
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-
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- //初始化图片的矩阵
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- matrix.set(imageView.imageMatrix)
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-
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- /**
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- * 初始化 将图片放在屏幕中心位置
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- */
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- center()
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-
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- /**
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- * 图片设置中心之后，重新设置图片的缩放矩阵
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- */
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- imageView.imageMatrix = matrix
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- }
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-
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- override fun onError(p0: java.lang.Exception?) {
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-
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- }
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- })
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- }
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- }
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- })
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-
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- }
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-
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- @SuppressLint("ClickableViewAccessibility")
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- override fun initEvents() {
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-
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- /**
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- * 设置ImageView的触摸事件
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- */
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- imageView.setOnTouchListener { _, event ->
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- onTouchEvent(event)
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- true
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- }
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-
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- /**
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- * 初始化手势
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- * 单击 双击 长按
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- * 这三个均是手势起作用
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- * 如果想要在这三种手势中进行何种操作，
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- * 将代码放在对应的方法中即可。
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- */
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- gestureDetector = GestureDetector(OASystem.context, object : GestureDetector.SimpleOnGestureListener() {})
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-
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- gestureDetector.setOnDoubleTapListener(object : OnDoubleTapListener {
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-
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- /**
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- * 单击手势 会触发该方法一次
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- * 单击对应的代码应放在这里
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- */
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- override fun onSingleTapConfirmed(p0: MotionEvent): Boolean {
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-
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-// this@PicturePreviewActivity.finish()
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- return false
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- }
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-
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- /**
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- * 双击手势的时候 会触发该方法一次
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- * 所以双击手势对应的代码应放在这里
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- */
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- override fun onDoubleTap(motionEvent: MotionEvent): Boolean {
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-
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-// pointF.x = motionEvent.x
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-// pointF.y = motionEvent.y
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-// tempMatrix.set(savedMatrix)
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-//
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-// if (resetScale < 1F) {
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-// isZoomIn = true
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-// }
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-//
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-// isZoomIn = if (isZoomIn) {
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-// tempMatrix.postScale(resetScale, resetScale, pointF.x, pointF.y)
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-// false
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-// } else {
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-// true
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-// }
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-//
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-// matrix.set(tempMatrix)
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-// center()
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-// imageView.imageMatrix = matrix
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-
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- return false
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- }
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-
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- override fun onDoubleTapEvent(p0: MotionEvent): Boolean {
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-
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- return false
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- }
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- })
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- }
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-
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- override fun onTouchEvent(event: MotionEvent): Boolean {
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- /**
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- * 在这里调用手势的方法
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- * 这是手势和触摸事件同时使用的方法
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- */
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- if (gestureDetector.onTouchEvent(event)) {
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- return true
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- } else {
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-
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- when (event.action and MotionEvent.ACTION_MASK) {
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-
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- MotionEvent.ACTION_DOWN -> {
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-
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- mode = DRAG
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-
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- xDown = event.x
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- yDown = event.y
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-
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- /**
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- * 单个手指放下，首先保存图片的缩放矩阵到savedMatrix
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- */
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- savedMatrix.set(matrix)
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- }
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-
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- MotionEvent.ACTION_POINTER_DOWN -> {
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-
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- mode = ZOOM
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-
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- /**
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- * 第二个手指刚放下时
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- * 计算两个手指间的距离
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- */
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- oldDist = spacing(event)
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-
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- /**
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- * 第二个手指刚放下时
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- * 计算两个手指间的旋转角度
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- */
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- oldRotation = rotation(event)
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- savedMatrix.set(matrix)
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- /**
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- * 第二个手指刚放下时
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- * 计算两个手指见的中间点坐标，并存在pointF中
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- */
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- midPoint(pointF, event)
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-
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- }
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-
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- MotionEvent.ACTION_MOVE -> {
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-
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- if (mode == ZOOM) {
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-
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- tempMatrix.set(savedMatrix)
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-
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- /**
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- * 两个手指开始移动
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- * 计算移动后旋转角度
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- */
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- newRotation = rotation(event)
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-
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- /**
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- * 两个角度之差
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- * 即是图片的旋转角度
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- */
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- rotation = newRotation - oldRotation
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-
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- /**
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- * 计算移动后两点间的中间点
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- */
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- val newDist = spacing(event)
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-
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- /**
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- * 两个中间点的商即时放大倍数
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- */
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- val scale = newDist / oldDist
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-
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- /**
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- * 放大倍数的倒数即是还原图片原来大小的倍数
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- */
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- resetScale = oldDist / newDist
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-
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- tempMatrix.postScale(scale, scale, pointF.x, pointF.y)// 縮放
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-// tempMatrix.postRotate(rotation, pointF.x, pointF.y)// 旋轉
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-
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- matrix.set(tempMatrix)
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-
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- /**
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- * 调用该方法即可重新图片
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- */
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- imageView.imageMatrix = matrix
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-
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- } else if (mode == DRAG) {
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-
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- tempMatrix.set(savedMatrix)
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-
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- var tx = event.x - xDown
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- var ty = event.y - yDown
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-
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- /**
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- * 单个手指移动后的距离大于20 才算作移动
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- */
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- if (sqrt(tx * tx + ty * ty) > 20F) {
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-
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- /**
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- * 设置图片宽高与屏幕宽高的大小的boolean类型的值
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- */
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-
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- /**
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- * 得到目前图片的宽高
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- */
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- val rectF = getMatrixRectF()
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-
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- /**
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- * 图片宽度小于屏幕大小
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- * 不移动
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- */
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- if (rectF.width() <= widthScreen) {
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- tx = 0F
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- isCheckRightAndLeft = false
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- } else {
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- isCheckRightAndLeft = true
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- }
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-
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- /**
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- * 图片高度小于屏幕高度
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- * 不移动
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- */
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- if (rectF.height() <= heightScreen) {
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- ty = 0F
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- isCheckTopAndBottom = false
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- } else {
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- isCheckTopAndBottom = true
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- }
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-
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- tempMatrix.postTranslate(tx, ty)// 平移
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-
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- /**
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- * 如果想在拖动图片的同时检测图片边缘是否
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- * 到达屏幕的边缘，则取消下面的注释
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- */
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-// checkDxDyBounds()
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- matrix.set(tempMatrix)
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- imageView.imageMatrix = matrix
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- }
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- }
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- }
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-
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- MotionEvent.ACTION_UP -> {
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-
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- }
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-
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- MotionEvent.ACTION_POINTER_UP -> {
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-
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- if (mode == ZOOM) {
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-
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- /**
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- * 双手放开，停止图片的旋转和缩放
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- * Reset_scale还原图片的缩放比例
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- */
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-// val rectF = getMatrixRectF()
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-//
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-// if (rectF.width() < widthScreen || rectF.height() < heightScreen) {
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-//
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-// val imageRatio = rectF.width() / rectF.height()
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-//
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-// tempMatrix.postScale(widthScreen / rectF.width(), heightScreen / rectF.height() * imageRatio, pointF.x, pointF.y)
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-// }
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-// tempMatrix.postScale(resetScale, resetScale, pointF.x, pointF.y)
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-
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- /**
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- * 双手放开，停止缩放、旋转图片，此时根据已旋转的角度
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- * 计算还原图片的角度，最终的效果是把图片竖直或横平方正。
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- */
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- setRotate()
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- matrix.set(tempMatrix)
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-
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- /**
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- * 将图片放在屏幕中间位置
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- */
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-// center()
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-
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- imageView.imageMatrix = matrix
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- tempMatrix.reset()
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-
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- } else if (mode == DRAG) {
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-
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- /**
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- * 单手拖动图片，放开手指，停止拖动
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- * 此时检测图片是否已经偏离屏幕边缘
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- * 如果偏离屏幕边缘，则图片回弹
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- */
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-
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-// checkDxDyBounds()
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-
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- matrix.set(tempMatrix)
|
|
|
- imageView.imageMatrix = matrix
|
|
|
- tempMatrix.reset()
|
|
|
- }
|
|
|
-
|
|
|
- mode = NONE
|
|
|
-
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- return true
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * 根据当前图片的Matrix获得图片的范围
|
|
|
- * 这里获取的是当前显示的图片的大小。
|
|
|
- * 图片放大后，获取的就是图片放大后的图片的大小。
|
|
|
- * 图片缩小后，获取的就是图片缩小后的图片的大小。
|
|
|
- *
|
|
|
- * 这个大小与图片的大小是有区别的。
|
|
|
- * 下面是固定用法，记住即可。
|
|
|
- * @return
|
|
|
- */
|
|
|
- private fun getMatrixRectF(): RectF {
|
|
|
- val m = matrix
|
|
|
- val rect = RectF()
|
|
|
- val drawable = imageView.drawable
|
|
|
-
|
|
|
- if (drawable != null) {
|
|
|
-
|
|
|
- rect.set(0F, 0F, drawable.intrinsicWidth.toFloat(), drawable.intrinsicHeight.toFloat())
|
|
|
- m.mapRect(rect)
|
|
|
- }
|
|
|
-
|
|
|
- return rect
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * 横向、纵向 图片居中
|
|
|
- */
|
|
|
- private fun center() {
|
|
|
- val rect = getMatrixRectF()
|
|
|
- var deltaX = 0F
|
|
|
- var deltaY = 0F
|
|
|
- val height = rect.height()
|
|
|
- val width = rect.width()
|
|
|
-
|
|
|
- /**
|
|
|
- * 图片小于屏幕大小，则居中显示。
|
|
|
- * 大于屏幕，如果图片上方留空则往上移，
|
|
|
- * 图片下方留空则往下移
|
|
|
- */
|
|
|
- val screenHeight = heightScreen
|
|
|
- if (height < screenHeight) {
|
|
|
-
|
|
|
- deltaY = (screenHeight - height) / 2 - rect.top
|
|
|
-
|
|
|
- } else if (rect.top > 0) {
|
|
|
-
|
|
|
- deltaY = -rect.top
|
|
|
-
|
|
|
- } else if (rect.bottom < screenHeight) {
|
|
|
-
|
|
|
- deltaY = imageView.height - rect.bottom
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- val screenWidth = widthScreen
|
|
|
- if (width < screenWidth) {
|
|
|
-
|
|
|
- deltaX = screenWidth - width / 2 - rect.left
|
|
|
-
|
|
|
- } else if (rect.left > 0) {
|
|
|
-
|
|
|
- deltaX = -rect.left
|
|
|
-
|
|
|
- } else if (rect.right < screenWidth) {
|
|
|
-
|
|
|
- deltaX = screenWidth - rect.right
|
|
|
-
|
|
|
- }
|
|
|
-
|
|
|
- matrix.postTranslate(deltaX, deltaY)
|
|
|
- }
|
|
|
-
|
|
|
- // 触碰两点间距离
|
|
|
- private fun spacing(event: MotionEvent ): Float {
|
|
|
- val x = event.getX(0) - event.getX(1)
|
|
|
- val y = event.getY(0) - event.getY(1)
|
|
|
- return sqrt(x * x + y * y)
|
|
|
- }
|
|
|
-
|
|
|
- // 取手势中心点
|
|
|
- private fun midPoint(point: PointF, event: MotionEvent) {
|
|
|
- val x = event.getX(0) + event.getX(1)
|
|
|
- val y = event.getY(0) + event.getY(1)
|
|
|
- point.set(x / 2, y / 2)
|
|
|
- }
|
|
|
-
|
|
|
- // 取旋转角度
|
|
|
- private fun rotation(event: MotionEvent): Float {
|
|
|
- val deltaX = (event.getX(0) - event.getX(1))
|
|
|
- val deltaY = (event.getY(0) - event.getY(1))
|
|
|
- /**
|
|
|
- * 反正切函数
|
|
|
- * 计算两个坐标点的正切角度
|
|
|
- */
|
|
|
- val radians = atan2(deltaY, deltaX).toDouble()
|
|
|
- return Math.toDegrees(radians).toFloat()
|
|
|
- }
|
|
|
- /**
|
|
|
- * 手指松开，确定旋转的角度
|
|
|
- */
|
|
|
- private fun setRotate(){
|
|
|
-
|
|
|
- when(rotation) {
|
|
|
- in -135F .. -90F -> {
|
|
|
- tempMatrix.postRotate(-90F, pointF.x, pointF.y)
|
|
|
- }
|
|
|
-
|
|
|
- in -90F..-45F -> {
|
|
|
- tempMatrix.postRotate(-90F, pointF.x, pointF.y)
|
|
|
- }
|
|
|
-
|
|
|
- in -45F.. 0F -> {
|
|
|
- tempMatrix.postRotate(0F, pointF.x, pointF.y)
|
|
|
- }
|
|
|
-
|
|
|
- in 0F .. 45F -> {
|
|
|
- tempMatrix.postRotate(0F, pointF.x, pointF.y)
|
|
|
- }
|
|
|
-
|
|
|
- in 45F .. 90F -> {
|
|
|
- tempMatrix.postRotate(90F, pointF.x, pointF.y)
|
|
|
- }
|
|
|
-
|
|
|
- in 90F .. 135F -> {
|
|
|
- tempMatrix.postRotate(90F, pointF.x, pointF.y)
|
|
|
- }
|
|
|
- }
|
|
|
- }
|
|
|
- /**
|
|
|
- * 检测图片偏离屏幕两边的距离
|
|
|
- * 然后平移，是图片边缘在屏幕边，
|
|
|
- * 使图片周围没有空白
|
|
|
- */
|
|
|
- private fun checkDxDyBounds(){
|
|
|
- val rectF = getMatrixRectF()
|
|
|
- var dx = 0.0F
|
|
|
- var dy = 0.0F
|
|
|
- /**
|
|
|
- * 如果图片的左侧大于零，说明图片左侧向右
|
|
|
- * 偏离了左侧屏幕，则左移偏离的距离.
|
|
|
- * rectF.left的值，是基于左侧坐标计算的。
|
|
|
- * 图片正常情况下，该值为0.
|
|
|
- * 当图片向右侧拖动以后，该值大于0.
|
|
|
- * 当图片向左侧拖动以后，该值小于0.
|
|
|
- */
|
|
|
- if (rectF.left > 0) {
|
|
|
- dx = -rectF.left
|
|
|
- }
|
|
|
- /**
|
|
|
- * 如果图片的右侧偏离屏幕的右侧，则
|
|
|
- * 图片右移图片的宽度与图片显示的宽度的差.
|
|
|
- *
|
|
|
- * rectF.right的值，是基于左侧计算的，图片没有缩放旋转情况下，
|
|
|
- * 该值==touchImageView.getWidth()图片的宽度。
|
|
|
- * 当拖动图片以后，该值变化，等于显示的图片的宽度
|
|
|
- */
|
|
|
- if (rectF.right < 0) {
|
|
|
- dx = widthScreen - rectF.right
|
|
|
- }
|
|
|
- /**
|
|
|
- * 当图片顶部大于0，说明图片向下偏离屏幕顶部，
|
|
|
- * 则图片向上回弹偏离的距离。
|
|
|
- *
|
|
|
- * rectF.top的值基于顶部坐标，
|
|
|
- * 图片正常情况下，该值=0.
|
|
|
- */
|
|
|
- if (rectF.top > 0) {
|
|
|
- dy = -rectF.top
|
|
|
- }
|
|
|
- /**
|
|
|
- * 当图片底部小于图片高度时，图片偏离屏幕底部
|
|
|
- * 则图片回弹图片的高度与显示的图片的高度之差。
|
|
|
- *
|
|
|
- * rectF.bottom的值，基于顶部坐标。
|
|
|
- * 图片正常情况下，该值=图片的高度。
|
|
|
- */
|
|
|
- if (rectF.bottom < 0) {
|
|
|
- dy = heightScreen - rectF.bottom
|
|
|
- }
|
|
|
- /**
|
|
|
- * 计算后，设置图片回弹
|
|
|
- */
|
|
|
- tempMatrix.postTranslate(dx, dy)
|
|
|
- }
|
|
|
-}
|
