添加搜索历史功能

app/build.gradle.kts

@@ -62,4 +62,5 @@ dependencies {
     implementation(libs.androidpdfviewer)
     implementation(libs.pdfbox.android)
     implementation(libs.jp2forandroid)
+    implementation(libs.flexbox)
 }

app/src/main/java/com/all/pdfreader/pro/app/ui/act/SearchActivity.kt

@@ -2,77 +2,93 @@ package com.all.pdfreader.pro.app.ui.act
 
 import android.content.Context
 import android.content.Intent
+import android.content.SharedPreferences
 import android.os.Bundle
 import android.text.Editable
 import android.text.TextWatcher
+import android.view.LayoutInflater
 import android.view.View
-import androidx.lifecycle.Lifecycle
+import android.widget.TextView
+import androidx.core.content.edit
 import androidx.lifecycle.lifecycleScope
-import androidx.lifecycle.repeatOnLifecycle
 import androidx.recyclerview.widget.LinearLayoutManager
 import com.all.pdfreader.pro.app.R
-import com.all.pdfreader.pro.app.databinding.ActivitySearchPddBinding
-import com.all.pdfreader.pro.app.ui.adapter.PdfAdapter
+import com.all.pdfreader.pro.app.databinding.ActivitySearchPdfBinding
 import com.all.pdfreader.pro.app.ui.adapter.SearchPdfAdapter
 import com.all.pdfreader.pro.app.ui.dialog.ListMoreDialogFragment
+import com.all.pdfreader.pro.app.ui.dialog.PermissionDialogFragment
+import com.all.pdfreader.pro.app.ui.dialog.PromptDialogFragment
 import com.all.pdfreader.pro.app.util.AppUtils.showKeyboard
 import com.gyf.immersionbar.ImmersionBar
 import kotlinx.coroutines.Job
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.flow.collectLatest
 import kotlinx.coroutines.launch
+import org.json.JSONArray
 
 class SearchActivity : BaseActivity() {
     override val TAG: String = "SearchActivity"
 
     companion object {
         const val FRAG_TAG = "SearchActivity"
+        private const val PREF_SEARCH_HISTORY = "pref_search_history"
+        private const val KEY_HISTORY_LIST = "key_history_list_json"
+
         fun createIntent(context: Context): Intent {
             return Intent(context, SearchActivity::class.java)
         }
     }
 
-    private lateinit var binding: ActivitySearchPddBinding
+    private lateinit var binding: ActivitySearchPdfBinding
     private lateinit var adapter: SearchPdfAdapter
     private val pdfRepository = getRepository()
     private var searchJob: Job? = null
 
+    private val searchHistory: MutableList<String> = mutableListOf()
+    private lateinit var sp: SharedPreferences
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
-        binding = ActivitySearchPddBinding.inflate(layoutInflater)
+        binding = ActivitySearchPdfBinding.inflate(layoutInflater)
         setContentView(binding.root)
         ImmersionBar.with(this).statusBarView(binding.view).statusBarDarkFont(true)
             .navigationBarColor(R.color.bg_color).init()
+
+        sp = getSharedPreferences(PREF_SEARCH_HISTORY, MODE_PRIVATE)
+        loadHistory()
+
         initView()
         setupClick()
+        showHistory()
     }
 
     private fun setupClick() {
-        binding.backBtn.setOnClickListener {
-            finish()
-        }
+        binding.backBtn.setOnClickListener { finish() }
+
         binding.searchEdit.addTextChangedListener(object : TextWatcher {
             override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) {}
             override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) {}
             override fun afterTextChanged(s: Editable?) {
                 val query = s?.toString().orEmpty()
-                binding.deleteIv.visibility =
-                    if (query.isEmpty()) View.GONE else View.VISIBLE
-                binding.searchIv.visibility =
-                    if (query.isEmpty()) View.VISIBLE else View.GONE
-                // 取消之前的任务，防止重复 collect
+                binding.deleteIv.visibility = if (query.isEmpty()) View.GONE else View.VISIBLE
+                binding.searchIv.visibility = if (query.isEmpty()) View.VISIBLE else View.GONE
+
+                if (query.isEmpty()) {
+                    showHistory()
+                    adapter.updateData(emptyList())
+                    binding.noFilesLayout.visibility = View.GONE
+                    return
+                } else {
+                    binding.historyLayout.visibility = View.GONE
+                }
+
                 searchJob?.cancel()
                 searchJob = lifecycleScope.launch {
-                    delay(150)//防止用户飞快打字
-                    if (query.isEmpty()) {
-                        adapter.updateData(emptyList())
-                        binding.noFilesLayout.visibility = View.VISIBLE
-                        return@launch
-                    }
+                    delay(150)
                     pdfRepository.searchDocuments(query).collectLatest { list ->
                         if (list.isNotEmpty()) {
                             adapter.updateData(list)
-                            adapter.highlightItems(query.trim()) // payload 高亮
+                            adapter.highlightItems(query.trim())
                             binding.noFilesLayout.visibility = View.GONE
                         } else {
                             adapter.updateData(emptyList())
@@ -82,6 +98,7 @@ class SearchActivity : BaseActivity() {
                 }
             }
         })
+
         binding.deleteIv.setOnClickListener {
             binding.searchEdit.apply {
                 setText("")
@@ -89,6 +106,18 @@ class SearchActivity : BaseActivity() {
                 setSelection(0)
             }
         }
+
+        binding.clearHistory.setOnClickListener {
+            PromptDialogFragment(
+                getString(R.string.tip),
+                getString(R.string.clear_history_desc),
+                getString(R.string.clear),
+                onOkClick = {
+                    searchHistory.clear()
+                    saveHistoryList() // 保存空列表
+                    showHistory()
+                }).show(supportFragmentManager, "clearHistory")
+        }
     }
 
     private fun initView() {
@@ -96,6 +125,8 @@ class SearchActivity : BaseActivity() {
         adapter = SearchPdfAdapter(onItemClick = { pdf ->
             val intent = PdfViewActivity.createIntent(this, pdf.filePath)
             startActivity(intent)
+            val query = binding.searchEdit.text.toString()
+            if (query.isNotEmpty()) saveHistory(query)
         }, onMoreClick = { pdf ->
             ListMoreDialogFragment(pdf.filePath).show(supportFragmentManager, FRAG_TAG)
         })
@@ -103,4 +134,51 @@ class SearchActivity : BaseActivity() {
         binding.recyclerView.layoutManager = LinearLayoutManager(this)
         binding.recyclerView.adapter = adapter
     }
+
+    /** 搜索历史逻辑 **/
+    private fun loadHistory() {
+        val json = sp.getString(KEY_HISTORY_LIST, "[]")
+        val array = JSONArray(json)
+        searchHistory.clear()
+        for (i in 0 until array.length()) {
+            searchHistory.add(array.getString(i))
+        }
+    }
+
+    private fun saveHistory(query: String) {
+        if (searchHistory.contains(query)) searchHistory.remove(query)
+        searchHistory.add(0, query)
+        if (searchHistory.size > 20) searchHistory.removeAt(searchHistory.size - 1)
+        saveHistoryList()
+    }
+
+    private fun saveHistoryList() {
+        val json = JSONArray(searchHistory).toString()
+        sp.edit { putString(KEY_HISTORY_LIST, json) }
+    }
+
+    private fun showHistory() {
+        binding.historyFlexLayout.removeAllViews()
+        if (searchHistory.isEmpty()) {
+            binding.historyLayout.visibility = View.GONE
+            return
+        }
+        binding.historyLayout.visibility = View.VISIBLE
+        val inflater = LayoutInflater.from(this)
+
+        searchHistory.forEach { keyword ->
+            val tagView = inflater.inflate(
+                R.layout.item_history_tag,
+                binding.historyFlexLayout,
+                false
+            ) as TextView
+            tagView.text = keyword
+            tagView.setOnClickListener {
+                binding.searchEdit.setText(keyword)
+                binding.searchEdit.setSelection(keyword.length)
+            }
+
+            binding.historyFlexLayout.addView(tagView)
+        }
+    }
 }

app/src/main/java/com/all/pdfreader/pro/app/ui/adapter/PdfAdapter.kt

@@ -45,6 +45,11 @@ class PdfAdapter(
                 .transform(CenterCrop(), RoundedCorners(8.dpToPx(holder.binding.root.context)))
                 .into(holder.binding.tvFileImg)
         }
+        if (item.isFavorite) {
+            holder.binding.collectState.visibility = View.VISIBLE
+        } else {
+            holder.binding.collectState.visibility = View.GONE
+        }
 
         holder.binding.root.setOnClickListener {
             onItemClick(item)

app/src/main/java/com/all/pdfreader/pro/app/ui/adapter/SearchPdfAdapter.kt

@@ -71,7 +71,11 @@ class SearchPdfAdapter(
                 .transform(CenterCrop(), RoundedCorners(8.dpToPx(context)))
                 .into(holder.binding.tvFileImg)
         }
-
+        if (item.isFavorite) {
+            holder.binding.collectState.visibility = View.VISIBLE
+        } else {
+            holder.binding.collectState.visibility = View.GONE
+        }
         holder.binding.root.setOnClickListener { onItemClick(item) }
         holder.binding.moreBtn.setOnClickListener { onMoreClick(item) }
     }

app/src/main/res/drawable/bg_history_item.xml

@@ -0,0 +1,5 @@
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <solid android:color="#F0F0F0"/>
+    <corners android:radius="12dp"/>
+</shape>

app/src/main/res/drawable/collected_white.xml

@@ -0,0 +1,13 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+  <path
+      android:pathData="M12,20.88L10.55,19.55C5.4,14.9 3,12.36 3,9.5C3,7.01 5.01,5 7.5,5C8.74,5 9.91,5.5 10.7,6.35L12,7.63L13.3,6.35C14.09,5.5 15.26,5 16.5,5C18.99,5 21,7.01 21,9.5C21,12.36 18.6,14.9 13.45,19.55L12,20.88Z"
+      android:strokeWidth="1.5"
+      android:fillColor="#ffffff"
+      android:strokeColor="#ffffff"
+      android:strokeLineCap="round"
+      android:strokeLineJoin="round"/>
+</vector>

app/src/main/res/drawable/dr_collect_state_bg.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <corners
+        android:topRightRadius="8dp"
+        android:bottomLeftRadius="8dp" />
+    <solid android:color="@color/icon_sel_on_color" />
+</shape>

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

@@ -1,7 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
-    xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:background="@color/bg_color"
@@ -98,6 +97,61 @@
             android:textSize="20sp" />
     </LinearLayout>
 
+    <LinearLayout
+        android:id="@+id/historyLayout"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:orientation="vertical"
+        android:visibility="visible">
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="32dp"
+            android:gravity="center_vertical"
+            android:layout_marginStart="16dp"
+            android:layout_marginEnd="16dp"
+            android:layout_marginTop="16dp"
+            android:orientation="horizontal">
+
+            <TextView
+                android:id="@+id/historyTitle"
+                style="@style/TextViewFont_PopMedium"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="@string/history"
+                android:textColor="#333333"
+                android:textSize="16sp" />
+
+            <View
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_weight="1" />
+
+            <LinearLayout
+                android:id="@+id/clearHistory"
+                android:layout_width="32dp"
+                android:layout_height="32dp"
+                android:gravity="center">
+
+                <ImageView
+                    android:layout_width="24dp"
+                    android:layout_height="24dp"
+                    android:src="@drawable/delete" />
+
+            </LinearLayout>
+        </LinearLayout>
+
+        <com.google.android.flexbox.FlexboxLayout
+            android:id="@+id/historyFlexLayout"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_margin="8dp"
+            app:flexWrap="wrap"
+            app:justifyContent="flex_start" />
+
+    </LinearLayout>
+
+
     <androidx.recyclerview.widget.RecyclerView
         android:id="@+id/recyclerView"
         android:layout_width="match_parent"

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

@@ -37,6 +37,16 @@
                 android:layout_width="56dp"
                 android:layout_height="56dp" />
 
+            <ImageView
+                android:id="@+id/collectState"
+                android:layout_width="16dp"
+                android:layout_height="16dp"
+                android:layout_alignParentEnd="true"
+                android:background="@drawable/dr_collect_state_bg"
+                android:padding="2dp"
+                android:src="@drawable/collected_white" />
+
+
             <LinearLayout
                 android:visibility="gone"
                 android:id="@+id/lock_layout"

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

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+<TextView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/tagText"
+    style="@style/TextViewFont_PopRegular"
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content"
+    android:layout_margin="8dp"
+    android:background="@drawable/bg_history_item"
+    android:gravity="center"
+    android:paddingStart="12dp"
+    android:paddingTop="6dp"
+    android:paddingEnd="12dp"
+    android:paddingBottom="6dp"
+    android:text="@string/app_name"
+    android:textColor="@color/black"
+    android:textSize="14sp" />

app/src/main/res/values/strings.xml

@@ -140,4 +140,8 @@
     <string name="go_to_page_desc">Quickly navigate to any page in the file.</string>
     <string name="name_must_be_number">Please enter a number(1-%1$d)</string>
     <string name="name_out_of_range">Please enter a number between 1 and %1$d</string>
+    <string name="history">History</string>
+    <string name="tip">Tip</string>
+    <string name="clear_history_desc">Are you sure you want to clear history?</string>
+    <string name="clear">Clear</string>
 </resources>

gradle/libs.versions.toml

@@ -2,6 +2,7 @@
 androidpdfviewer = "3.2.8"
 appcompat = "1.7.1"
 agp = "8.10.1"
+flexbox = "3.0.0"
 fragmentKtx = "1.8.9"
 glide = "5.0.4"
 jp2forandroid = "1.0.4"
@@ -30,6 +31,7 @@ androidx-fragment-ktx = { module = "androidx.fragment:fragment-ktx", version.ref
 androidx-room-compiler = { group = "androidx.room", name = "room-compiler", version.ref = "room_version" }
 androidx-room-ktx = { group = "androidx.room", name = "room-ktx", version.ref = "room_version" }
 androidx-room-runtime = { group = "androidx.room", name = "room-runtime", version.ref = "room_version" }
+flexbox = { module = "com.google.android.flexbox:flexbox", version.ref = "flexbox" }
 glide = { module = "com.github.bumptech.glide:glide", version.ref = "glide" }
 jp2forandroid = { module = "com.github.Tgo1014:JP2ForAndroid", version.ref = "jp2forandroid" }
 junit = { group = "junit", name = "junit", version.ref = "junit" }