0.0.1

.gitignore

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+*.iml
+.gradle
+/local.properties
+.idea
+.DS_Store
+/build
+/captures
+.externalNativeBuild
+.cxx
+### Android template
+# Built application files
+*.apk
+*.ap_
+*.aab
+
+# Files for the ART/Dalvik VM
+*.dex
+
+# Java class files
+*.class
+
+# Generated files
+bin/
+gen/
+out/
+release/
+
+# Gradle files
+.gradle/
+build/
+
+# Local configuration file (sdk path, etc)
+local.properties
+
+# Proguard folder generated by Eclipse
+proguard/
+
+# Log Files
+*.log
+
+# Android Studio Navigation editor temp files
+.navigation/
+
+# Android Studio captures folder
+captures/
+
+# IntelliJ
+*.iml
+.idea/workspace.xml
+.idea/tasks.xml
+.idea/gradle.xml
+.idea/assetWizardSettings.xml
+.idea/dictionaries
+.idea/libraries
+# Android Studio 3 in .gitignore file.
+.idea/caches
+.idea/modules.xml
+# Comment next line if keeping position of elements in Navigation Editor is relevant for you
+.idea/navEditor.xml
+
+# Keystore files
+# Uncomment the following lines if you do not want to check your keystore files in.
+#*.jks
+#*.keystore
+
+# External native build folder generated in Android Studio 2.2 and later
+.externalNativeBuild
+
+# Google Services (e.g. APIs or Firebase)
+# google-services.json
+
+# Freeline
+freeline.py
+freeline/
+freeline_project_description.json
+
+# fastlane
+fastlane/report.xml
+fastlane/Preview.html
+fastlane/screenshots
+fastlane/test_output
+fastlane/readme.md
+
+# Version control
+vcs.xml
+
+# lint
+lint/intermediates/
+lint/generated/
+lint/outputs/
+lint/tmp/
+# lint/reports/
+

README.md

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+## SavedDelegate
+
+## 项目描述
+
+还在傻傻的写 `onSaveInstanceState` 和 `onRestoreInstanceState` 方法么?
+
+还在为项目中 大量的 未保存和恢复处理的变量 引起的错误 头疼?
+
+**Just do it!!! you can fly!!!**
+
+## 使用方法
+
+```kotlin
+
+//使用 delegate
+var a: Int? by SavedDelegate { 10 }
+
+var b: IntArray by SavedDelegateNotNull {
+    IntArray(10) { it }
+}
+
+//在Activity 合适的方法中(onCreate?,onResume?, 总之在 页面关闭之前调用即可)
+SavedDelegateHelper.registerSimple(activity)
+//或
+SavedDelegateHelper.registerSimple(fragment)
+
+//或
+SavedDelegateHelper.registerSavedProvider(savedStateRegistry,activity/fragment)
+//或
+SavedDelegateHelper.registerWithLifecycle(lifecycleOwner,savedStateRegistry,activity/fragment)
+```
+
+然后,你的这些变量,在页面被销毁时,就会被自动恢复了!!
+
+## 效果
+
+打开手机 开发者模式中的 不保留活动
+
+![screen](./screen/screen.gif)
+
+
+## 项目依赖
+
+- androidx 和kotlin ,所以一定要是 kotlin 开发的项目,并且迁移了androidx库
+- 真正保存和恢复数据的是savestate库,这个库在 androidx 中默认被导入,所以可以直接使用
+
+## TODO
+
+- 没有测试效率问题,因为保存数据采用了反射
+- 保存数据时会检查数据是否能够写入Bundle,主要是类型判断,这样存在隐患,需要触发了才能报错,想办法提前,检验
+- 还没有进行比较全面的测试,主要是数据类型方面
+
+
+
+## 更新日志
+
+###  0.0.1
+
+项目初步完成,还没有进行比较全面的测试(数据类型方面)
+
+## 实现思路
+
+1. 熟悉 savestate 库,强烈建议大家去看看
+2. 使用属性委托在get方法中,查询 savedStateRegistry 中保存的数据
+3. 为savedStateRegistry 注册 SavedStateRegistry.SavedStateProvider
+4. 在 SavedStateRegistry.SavedStateProvider 中,使用反射,读取 activity/fragment 中使用了委托对象的属性
+5. 获取到对象属性后,获取值和类型,调用Bundle 相应的方法写入即可

app/.gitignore

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+/build

app/build.gradle

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+apply plugin: 'com.android.application'
+apply plugin: 'kotlin-android'
+apply plugin: 'kotlin-android-extensions'
+
+android {
+    compileSdkVersion 29
+    buildToolsVersion "29.0.3"
+
+    defaultConfig {
+        applicationId "cn.yzl.saved.delegate.simple"
+        minSdkVersion 21
+        targetSdkVersion 29
+        versionCode 1
+        versionName "1.0"
+
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+
+}
+
+dependencies {
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+    implementation 'androidx.appcompat:appcompat:1.1.0'
+    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
+    implementation "org.jetbrains.kotlin:kotlin-reflect:$kotlin_version"
+    implementation project(path: ':savedelegate')
+}

app/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

app/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="cn.yzl.saved.delegate.simple">
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/AppTheme">
+        <activity android:name=".Main2Activity"></activity>
+        <activity android:name=".MainActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

app/src/main/java/cn/yzl/saved/delegate/simple/Fragment.kt

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+package cn.yzl.saved.delegate.simple
+
+import androidx.fragment.app.Fragment
+import cn.yzl.saved.delegate.SavedDelegateHelper
+
+class Fragment: Fragment() {
+    fun a(){
+        SavedDelegateHelper.registerSimple(this)
+    }
+}

app/src/main/java/cn/yzl/saved/delegate/simple/Main2Activity.kt

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+package cn.yzl.saved.delegate.simple
+
+import androidx.appcompat.app.AppCompatActivity
+import android.os.Bundle
+
+class Main2Activity : AppCompatActivity() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_main2)
+    }
+}

app/src/main/java/cn/yzl/saved/delegate/simple/MainActivity.kt

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+package cn.yzl.saved.delegate.simple
+
+import android.content.Intent
+import android.os.Bundle
+import android.os.PersistableBundle
+import android.util.Log
+import androidx.appcompat.app.AppCompatActivity
+import cn.yzl.saved.delegate.SavedDelegate
+import cn.yzl.saved.delegate.SavedDelegateHelper
+import cn.yzl.saved.delegate.SavedDelegateNotNull
+import kotlinx.android.synthetic.main.activity_main.*
+
+class MainActivity : AppCompatActivity() {
+
+    var a: Int? by SavedDelegate() { 10 }
+
+    var b: String? by SavedDelegate() { "hahha" }
+
+    var c: Boolean? by SavedDelegate { false }
+
+    var d: IntArray by SavedDelegateNotNull {
+        IntArray(10) { it }
+    }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_main)
+        second.setOnClickListener {
+            a = (a ?: 0) + 1
+            b = null
+            c = true
+            d.forEachIndexed { index, i ->
+                d[index] *= 10
+            }
+            startActivity(Intent(this, Main2Activity::class.java))
+        }
+        SavedDelegateHelper.registerSimple(this)
+    }
+
+    override fun onResume() {
+        super.onResume()
+        log("----")
+        log(a?.toString())
+        log(b?.toString())
+        log(c?.toString())
+        log(d.joinToString(separator = ","))
+//        log(e?.toString())
+//        log(a?.toString())
+
+        log("----")
+    }
+
+
+    private fun log(msg: String?) {
+        Log.e("hahaha", msg ?: "NULL")
+    }
+
+}

app/src/main/res/drawable-v24/ic_launcher_foreground.xml

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+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:aapt="http://schemas.android.com/aapt"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path android:pathData="M31,63.928c0,0 6.4,-11 12.1,-13.1c7.2,-2.6 26,-1.4 26,-1.4l38.1,38.1L107,108.928l-32,-1L31,63.928z">
+        <aapt:attr name="android:fillColor">
+            <gradient
+                android:endX="85.84757"
+                android:endY="92.4963"
+                android:startX="42.9492"
+                android:startY="49.59793"
+                android:type="linear">
+                <item
+                    android:color="#44000000"
+                    android:offset="0.0" />
+                <item
+                    android:color="#00000000"
+                    android:offset="1.0" />
+            </gradient>
+        </aapt:attr>
+    </path>
+    <path
+        android:fillColor="#FFFFFF"
+        android:fillType="nonZero"
+        android:pathData="M65.3,45.828l3.8,-6.6c0.2,-0.4 0.1,-0.9 -0.3,-1.1c-0.4,-0.2 -0.9,-0.1 -1.1,0.3l-3.9,6.7c-6.3,-2.8 -13.4,-2.8 -19.7,0l-3.9,-6.7c-0.2,-0.4 -0.7,-0.5 -1.1,-0.3C38.8,38.328 38.7,38.828 38.9,39.228l3.8,6.6C36.2,49.428 31.7,56.028 31,63.928h46C76.3,56.028 71.8,49.428 65.3,45.828zM43.4,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2c-0.3,-0.7 -0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C45.3,56.528 44.5,57.328 43.4,57.328L43.4,57.328zM64.6,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2s-0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C66.5,56.528 65.6,57.328 64.6,57.328L64.6,57.328z"
+        android:strokeWidth="1"
+        android:strokeColor="#00000000" />
+</vector>