...提交部分ui...

app/src/main/java/com/base/superpdfreader/activity/PdfBrowserActivity.kt

 package com.base.superpdfreader.activity
 
+import android.animation.Animator
+import android.animation.AnimatorListenerAdapter
+import android.animation.ValueAnimator
+import android.annotation.SuppressLint
+import android.view.View
+import androidx.core.animation.addListener
+import androidx.lifecycle.lifecycleScope
 import com.base.superpdfreader.databinding.ActivityPdfBrowserBinding
 import com.base.superpdfreader.helps.BaseActivity
+import com.base.superpdfreader.helps.LogEx
 import com.github.barteksc.pdfviewer.scroll.DefaultScrollHandle
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.launch
 import java.io.File
 
+
 class PdfBrowserActivity : BaseActivity<ActivityPdfBrowserBinding>() {
 
     var pageNumber = 0
 
+    private val TAG = "PdfBrowserActivity"
+
     override val binding: ActivityPdfBrowserBinding by lazy {
         ActivityPdfBrowserBinding.inflate(layoutInflater)
     }
@@ -30,4 +45,72 @@ class PdfBrowserActivity : BaseActivity<ActivityPdfBrowserBinding>() {
         }
     }
 
+    override fun initListener() {
+        binding.pdfview.setOnClickListener {
+            toggleTools()
+        }
+    }
+
+
+    var toolsShow = false
+    var fadeAnimator: ValueAnimator? = null
+    var currentAlpha = 0f
+    var autoDismissJob: Job? = null
+    private fun toggleTools() {
+        toolsShow = !toolsShow
+        toolsFadeShow()
+    }
+
+    @SuppressLint("Recycle")
+    private fun toolsFadeShow() {
+        fadeAnimator?.cancel()
+        fadeAnimator = if (toolsShow) {
+            binding.llTools.visibility = View.VISIBLE
+            ValueAnimator.ofFloat(currentAlpha, 1f)
+        } else {
+            autoDismissJob?.cancel()
+            ValueAnimator.ofFloat(currentAlpha, 0f)
+        }
+        LogEx.logDebug(TAG, "toolsShow=$toolsShow currentAlpha=$currentAlpha")
+
+        fadeAnimator?.setDuration(500) // 动画持续时间500毫秒
+
+        fadeAnimator?.addUpdateListener { animation -> // 取动画的当前值并更新视图的透明度
+            currentAlpha = animation.getAnimatedValue() as Float
+            binding.llTools.setAlpha(currentAlpha)
+            LogEx.logDebug(TAG, "addUpdateListener currentAlpha=$currentAlpha")
+            if (toolsShow && currentAlpha == 1f) {
+                autoDismiss()
+            }
+        }
+        fadeAnimator?.addListener {
+            object : AnimatorListenerAdapter() {
+                override fun onAnimationStart(animation: Animator) {
+                    super.onAnimationStart(animation)
+                    LogEx.logDebug(TAG, "onAnimationStart toolsShow=$toolsShow")
+                }
+
+                override fun onAnimationEnd(animation: Animator) {
+                    super.onAnimationEnd(animation)
+                    if (!toolsShow) {
+                        binding.llTools.visibility = View.GONE
+                    }
+                    LogEx.logDebug(TAG, "onAnimationEnd toolsShow=$toolsShow")
+                }
+
+                override fun onAnimationCancel(animation: Animator) {
+                }
+            }
+        }
+        fadeAnimator?.start()
+    }
+
+    private fun autoDismiss() {
+        lifecycleScope.launch(Dispatchers.Main) {
+            delay(3000)
+            toolsShow = false
+            toolsFadeShow()
+        }
+    }
+
 }
\ No newline at end of file

app/src/main/java/com/base/superpdfreader/helps/LogEx.kt

+package com.base.superpdfreader.helps
+
+import android.util.Log
+import com.base.superpdfreader.BuildConfig
+
+object LogEx {
+    val isOpen = true
+    val filterTAG = arrayOf(
+        "",
+    )
+
+    fun logDebug(tag: String, content: String, isMust: Boolean = false) {
+        if (isMust) {
+            Log.e(tag, content)
+        } else {
+            if (!isOpen) return
+            if (filterTAG.contains(tag)) return
+            if (BuildConfig.DEBUG) {
+                Log.e(tag, content)
+            }
+        }
+    }
+}
\ No newline at end of file

app/src/main/res/layout/activity_pdf_browser.xml

@@ -18,6 +18,7 @@
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:background="@color/white"
+        android:visibility="gone"
         app:layout_constraintTop_toTopOf="parent">
 
         <LinearLayout