加入 Kotlin 协程

优化部分代码的写法

Author: getActivity

README.md

@@ -6,6 +6,14 @@
 
 * 博客地址：[但愿人长久，搬砖不再有](https://www.jianshu.com/p/77dd326f21dc)
 
+* 另外你如果对 Kotlin 不熟悉，恰好想学习的话，推荐你通过下面这三篇文章来学习
+
+    * [全民 Kotlin：Java我们不一样](https://www.jianshu.com/p/a01e6b957269)
+
+    * [全民 Kotlin：你没有玩过的全新玩法](https://www.jianshu.com/p/884ca0a49e5e)
+
+    * [全民 Kotlin：协程特别篇](https://www.jianshu.com/p/2e0746c7d4f3)
+
 * 当我们日复一日年复一年的搬砖的时候，你是否曾想过提升一下开发效率，如果一个通用的架构摆在你的面前，你还会选择自己搭架构么，但是搭建出一个好的架构并非易事，有多少人愿意选择去做，还有多少人选择努力去做好，可能寥寥无几，但是你今天看到的，正是你所想要的，一个真正能解决你开发新项目时最大痛点的架构工程，你不需要再麻木 Copy 原有旧项目的代码，只需改动少量代码就能得到想要的效果，你会发现开发新项目其实是一件很快乐的事。
 
 * AndroidProject 已维护三年多的时间，几乎耗尽我所有的业余时间，里面的代码改了再改，改了又改，不断 Review、不断创新、不断改进、不断测试、不断优化，每天都在重复这些枯燥的步骤，但是只有这样才能把这件事做好，因为我相信把同样一件事重复做，迟早有一天可以做好。

app/src/main/java/com/hjq/demo/manager/ActivityManager.kt

@@ -19,18 +19,10 @@ class ActivityManager private constructor() : ActivityLifecycleCallbacks {
     companion object {
 
         @Suppress("StaticFieldLeak")
-        @Volatile
-        private var sInstance: ActivityManager? = null
+        private val activityManager: ActivityManager by lazy { ActivityManager() }
 
         fun getInstance(): ActivityManager {
-            if (sInstance == null) {
-                synchronized(ActivityManager::class.java) {
-                    if (sInstance == null) {
-                        sInstance = ActivityManager()
-                    }
-                }
-            }
-            return sInstance!!
+            return activityManager
         }
 
         /**

app/src/main/java/com/hjq/demo/manager/ThreadPoolManager.kt

@@ -18,15 +18,17 @@ import android.view.View
 import android.widget.TextView
 import androidx.core.view.GravityCompat
 import androidx.drawerlayout.widget.DrawerLayout
+import androidx.lifecycle.lifecycleScope
 import com.gyf.immersionbar.ImmersionBar
 import com.hjq.demo.R
 import com.hjq.demo.aop.SingleClick
 import com.hjq.demo.app.AppActivity
-import com.hjq.demo.manager.ThreadPoolManager
 import com.hjq.demo.other.AppConfig
 import com.hjq.permissions.Permission
 import com.hjq.permissions.XXPermissions
 import com.tencent.bugly.crashreport.CrashReport
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
 import java.io.PrintWriter
 import java.io.StringWriter
 import java.net.InetAddress
@@ -227,14 +229,17 @@ class CrashActivity : AppActivity() {
             }
             if (permissions.contains(Manifest.permission.INTERNET)) {
                 builder.append("\n当前网络访问：\t")
-                ThreadPoolManager.getInstance().execute {
+
+                lifecycleScope.launch(Dispatchers.IO) {
                     try {
                         InetAddress.getByName("www.baidu.com")
                         builder.append("正常")
                     } catch (ignored: UnknownHostException) {
                         builder.append("异常")
                     }
-                    post { infoView?.text = builder }
+                    lifecycleScope.launch(Dispatchers.Main) {
+                        infoView?.text = builder
+                    }
                 }
             } else {
                 infoView?.text = builder

app/src/main/java/com/hjq/demo/ui/activity/CrashActivity.kt

@@ -8,6 +8,7 @@ import android.provider.MediaStore
 import android.text.TextUtils
 import android.view.*
 import android.view.animation.*
+import androidx.lifecycle.lifecycleScope
 import androidx.recyclerview.widget.RecyclerView
 import com.hjq.base.BaseActivity
 import com.hjq.base.BaseAdapter
@@ -18,7 +19,6 @@ import com.hjq.demo.aop.Log
 import com.hjq.demo.aop.Permissions
 import com.hjq.demo.aop.SingleClick
 import com.hjq.demo.app.AppActivity
-import com.hjq.demo.manager.ThreadPoolManager
 import com.hjq.demo.other.GridSpaceDecoration
 import com.hjq.demo.ui.activity.CameraActivity.OnCameraListener
 import com.hjq.demo.ui.adapter.ImageSelectAdapter
@@ -28,6 +28,8 @@ import com.hjq.demo.widget.StatusLayout
 import com.hjq.permissions.Permission
 import com.hjq.permissions.XXPermissions
 import com.hjq.widget.view.FloatActionButton
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
 import java.io.File
 import java.util.*
 
@@ -150,7 +152,7 @@ class ImageSelectActivity : AppActivity(), StatusAction, Runnable,
         // 显示加载进度条
         showLoading()
         // 加载图片列表
-        ThreadPoolManager.getInstance().execute(this)
+        lifecycleScope.launch(Dispatchers.IO) { run() }
     }
 
     override fun getStatusLayout(): StatusLayout? {
@@ -238,7 +240,7 @@ class ImageSelectActivity : AppActivity(), StatusAction, Runnable,
                             // 这里需要延迟刷新，否则可能会找不到拍照的图片
                             postDelayed({
                                 // 重新加载图片列表
-                                ThreadPoolManager.getInstance().execute(this@ImageSelectActivity)
+                                lifecycleScope.launch { run() }
                             }, 1000)
                         }
 

app/src/main/java/com/hjq/demo/ui/activity/ImageSelectActivity.kt

@@ -2,6 +2,7 @@ package com.hjq.demo.ui.activity
 
 import android.view.Gravity
 import android.view.View
+import androidx.lifecycle.lifecycleScope
 import com.hjq.base.BaseDialog
 import com.hjq.base.action.AnimAction
 import com.hjq.demo.R
@@ -12,7 +13,6 @@ import com.hjq.demo.http.glide.GlideApp
 import com.hjq.demo.http.model.HttpData
 import com.hjq.demo.manager.ActivityManager
 import com.hjq.demo.manager.CacheDataManager
-import com.hjq.demo.manager.ThreadPoolManager
 import com.hjq.demo.other.AppConfig
 import com.hjq.demo.ui.dialog.MenuDialog
 import com.hjq.demo.ui.dialog.SafeDialog
@@ -21,6 +21,9 @@ import com.hjq.http.EasyHttp
 import com.hjq.http.listener.HttpCallback
 import com.hjq.widget.layout.SettingBar
 import com.hjq.widget.view.SwitchButton
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
 
 /**
  *    author : Android 轮子哥
@@ -132,11 +135,11 @@ class SettingActivity : AppActivity(), SwitchButton.OnCheckedChangeListener {
 
                 // 清除内存缓存（必须在主线程）
                 GlideApp.get(this@SettingActivity).clearMemory()
-                ThreadPoolManager.getInstance().execute {
-                    CacheDataManager.clearAllCache(this)
+                lifecycleScope.launch(Dispatchers.IO) {
+                    CacheDataManager.clearAllCache(this@SettingActivity)
                     // 清除本地缓存（必须在子线程）
                     GlideApp.get(this@SettingActivity).clearDiskCache()
-                    post {
+                    withContext(Dispatchers.Main) {
                         // 重新获取应用缓存大小
                         cleanCacheView?.setRightText(CacheDataManager.getTotalCacheSize(this@SettingActivity))
                     }

app/src/main/java/com/hjq/demo/ui/activity/SettingActivity.kt

@@ -11,6 +11,7 @@ import android.os.Parcelable
 import android.provider.MediaStore
 import android.view.*
 import android.view.animation.*
+import androidx.lifecycle.lifecycleScope
 import androidx.recyclerview.widget.RecyclerView
 import com.hjq.base.BaseActivity
 import com.hjq.base.BaseAdapter
@@ -21,7 +22,6 @@ import com.hjq.demo.aop.Log
 import com.hjq.demo.aop.Permissions
 import com.hjq.demo.aop.SingleClick
 import com.hjq.demo.app.AppActivity
-import com.hjq.demo.manager.ThreadPoolManager
 import com.hjq.demo.other.GridSpaceDecoration
 import com.hjq.demo.ui.activity.CameraActivity.OnCameraListener
 import com.hjq.demo.ui.adapter.VideoSelectAdapter
@@ -32,6 +32,8 @@ import com.hjq.permissions.Permission
 import com.hjq.permissions.XXPermissions
 import com.hjq.widget.view.FloatActionButton
 import com.tencent.bugly.crashreport.CrashReport
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
 import java.io.File
 import java.util.*
 
@@ -150,7 +152,7 @@ class VideoSelectActivity : AppActivity(), StatusAction, Runnable, BaseAdapter.O
         // 显示加载进度条
         showLoading()
         // 加载视频列表
-        ThreadPoolManager.getInstance().execute(this)
+        lifecycleScope.launch(Dispatchers.IO) { run() }
     }
 
     override fun getStatusLayout(): StatusLayout? {
@@ -241,7 +243,7 @@ class VideoSelectActivity : AppActivity(), StatusAction, Runnable, BaseAdapter.O
                             // 这里需要延迟刷新，否则可能会找不到拍照的视频
                             postDelayed({
                                 // 重新加载视频列表
-                                ThreadPoolManager.getInstance().execute(this@VideoSelectActivity)
+                                lifecycleScope.launch { run() }
                             }, 1000)
                         }
 

app/src/main/java/com/hjq/demo/ui/activity/VideoSelectActivity.kt

@@ -2,7 +2,8 @@ package com.hjq.demo.ui.fragment
 
 import android.content.res.ColorStateList
 import android.widget.TextView
-import androidx.appcompat.widget.*
+import androidx.appcompat.widget.AppCompatImageView
+import androidx.appcompat.widget.Toolbar
 import androidx.core.content.ContextCompat
 import androidx.recyclerview.widget.RecyclerView
 import androidx.viewpager.widget.ViewPager
@@ -13,7 +14,7 @@ import com.hjq.demo.R
 import com.hjq.demo.app.AppFragment
 import com.hjq.demo.app.TitleBarFragment
 import com.hjq.demo.ui.activity.HomeActivity
-import com.hjq.demo.ui.adapter.*
+import com.hjq.demo.ui.adapter.TabAdapter
 import com.hjq.demo.ui.adapter.TabAdapter.OnTabListener
 import com.hjq.demo.widget.XCollapsingToolbarLayout
 import com.hjq.demo.widget.XCollapsingToolbarLayout.OnScrimsListener

app/src/main/java/com/hjq/demo/ui/fragment/HomeFragment.kt

@@ -68,4 +68,10 @@ dependencies {
     implementation 'androidx.appcompat:appcompat:1.3.1'
     // Material 库：https://github.com/material-components/material-components-android
     implementation 'com.google.android.material:material:1.4.0'
+
+    // Kotlin 协程：https://github.com/Kotlin/kotlinx.coroutines
+    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.6.0'
+    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.6.0'
+    implementation 'androidx.lifecycle:lifecycle-runtime-ktx:2.3.1'
+    implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.3.1'
 }

common.gradle

@@ -34,11 +34,7 @@ interface HandlerAction {
      * 延迟一段时间执行
      */
     fun postDelayed(runnable: Runnable, delayMillis: Long): Boolean {
-        var delayMillis: Long = delayMillis
-        if (delayMillis < 0) {
-            delayMillis = 0
-        }
-        return postAtTime(runnable, SystemClock.uptimeMillis() + delayMillis)
+        return postAtTime(runnable, SystemClock.uptimeMillis() + if (delayMillis < 0) 0 else delayMillis)
     }
 
     /**

library/base/src/main/java/com/hjq/base/action/HandlerAction.kt

@@ -3,6 +3,7 @@ package com.hjq.widget.view
 import android.content.Context
 import android.graphics.drawable.Drawable
 import android.text.Editable
+import android.text.TextUtils
 import android.text.TextWatcher
 import android.util.AttributeSet
 import android.view.MotionEvent
@@ -60,11 +61,7 @@ class ClearEditText @JvmOverloads constructor(
      * [OnFocusChangeListener]
      */
     override fun onFocusChange(view: View, hasFocus: Boolean) {
-        if (hasFocus && text != null) {
-            setDrawableVisible(text!!.isNotEmpty())
-        } else {
-            setDrawableVisible(false)
-        }
+        setDrawableVisible(hasFocus && !TextUtils.isEmpty(text))
         focusChangeListener?.onFocusChange(view, hasFocus)
     }
 
@@ -91,7 +88,7 @@ class ClearEditText @JvmOverloads constructor(
             }
             return true
         }
-        return touchListener != null && touchListener!!.onTouch(view, event)
+        return touchListener?.onTouch(view, event) ?: false
     }
 
     /**

library/widget/src/main/java/com/hjq/widget/view/ClearEditText.kt

@@ -1,12 +1,16 @@
 package com.hjq.widget.view
 
-import android.content.*
+import android.content.Context
 import android.graphics.drawable.Drawable
-import android.text.*
+import android.text.Editable
+import android.text.InputType
+import android.text.TextUtils
+import android.text.TextWatcher
 import android.text.method.HideReturnsTransformationMethod
 import android.text.method.PasswordTransformationMethod
 import android.util.AttributeSet
-import android.view.*
+import android.view.MotionEvent
+import android.view.View
 import android.view.View.OnFocusChangeListener
 import android.view.View.OnTouchListener
 import androidx.core.content.ContextCompat
@@ -76,11 +80,7 @@ class PasswordEditText @JvmOverloads constructor(
      * [OnFocusChangeListener]
      */
     override fun onFocusChange(view: View?, hasFocus: Boolean) {
-        if (hasFocus && text != null) {
-            setDrawableVisible(text!!.isNotEmpty())
-        } else {
-            setDrawableVisible(false)
-        }
+        setDrawableVisible(hasFocus && !TextUtils.isEmpty(text))
         focusChangeListener?.onFocusChange(view, hasFocus)
     }