Flutter应用生命周期管理插件app_life的使用

Flutter应用生命周期管理插件app_life的使用

原生的生命周期函数，支持 iOS 和 Android，不同于 flutter 中自带的 WidgetBindings

Android/IOS 原生生命周期

android 生命周期

• ON_CREATE onCreate
• ON_START onStart
• ON_RESTART onRestart
• ON_RESUME onResume
• ON_STOP onStop
• ON_PAUSE onPause
• ON_DESTROY onDestroy

iOS 生命周期

• DID_FINISH_LAUNCHING_WITH_OPTIONS didFinishLaunchingWithOptions
• APPLICATION_WILL_RESIGN_ACTIVE applicationWillResignActive
• APPLICATION_DID_ENTER_BACKGROUND applicationDidEnterBackground
• APPLICATION_WILL_ENTER_FOREGROUND applicationWillEnterForeground
• APPLICATION_DID_BECOME_ACTIVE applicationDidBecomeActive
• APPLICATION_WILL_TERMINATE applicationWillTerminate

注册生命周期函数

Android

public class MainActivity extends FlutterActivity {
    private static final String TAG = MainActivity.class.getName();

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // 注册对应的生命周期函数
        AppLifeManage.registerLife(AppLifeManage.LifeEnum.ON_CREATE);
        Log.e(TAG, "onCreate: ");
    }

    @Override
    protected void onRestart() {
        super.onRestart();
        Log.e(TAG, "onRestart: ");
        AppLifeManage.registerLife(AppLifeManage.LifeEnum.ON_RESTART);
    }

    @Override
    protected void onResume() {
        super.onResume();
        Log.e(TAG, "onResume: ");
        AppLifeManage.registerLife(AppLifeManage.LifeEnum.ON_RESUME);
    }
}

iOS

• 引入头文件 #import "AppLifePlugin.h"

@implementation AppDelegate
/**
 应用创建
 */
- (BOOL)application:(UIApplication *)application
    didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
  [GeneratedPluginRegistrant registerWithRegistry:self];
  // Override point for customization after application launch.
    NSLog(@"%@", @"didFinishLaunchingWithOptions: 应用创建");
    [AppLifePlugin registerLife:DID_FINISH_LAUNCHING_WITH_OPTIONS];
  return [super application:application didFinishLaunchingWithOptions:launchOptions];
}

/**
 应用从活动状态进入非活动状态，如从应用切换到桌面
 */
- (void)applicationWillResignActive:(UIApplication *)application{
    NSLog(@"%@", @"applicationWillResignActive: 应用从活动状态进入非活动状态");
    [AppLifePlugin registerLife:APPLICATION_WILL_RESIGN_ACTIVE];
}

/**
 应用处于后台
 */
- (void)applicationDidEnterBackground:(UIApplication *)application{
    NSLog(@"%@", @"applicationDidEnterBackground: 应用处于后台");
    [AppLifePlugin registerLife:APPLICATION_DID_ENTER_BACKGROUND];
}

/**
 应用进入前台，但还没有处于活动状态
 */
- (void)applicationWillEnterForeground:(UIApplication *)application{
    NSLog(@"%@", @"applicationWillEnterForeground: 应用进入前台，但还没有处于活动状态");
    [AppLifePlugin registerLife:APPLICATION_WILL_ENTER_FOREGROUND];
}

/**
 应用处于前台并且活动状态
 */
- (void)applicationDidBecomeActive:(UIApplication *)application{
    NSLog(@"%@", @"applicationDidBecomeActive: 应用处于前台并且活动状态");
    [AppLifePlugin registerLife:APPLICATION_DID_BECOME_ACTIVE];
}

/**
 应用终止，销毁
 */
- (void)applicationWillTerminate:(UIApplication *)application{
    NSLog(@"%@", @"applicationWillTerminate: 应用终止，销毁");
    [AppLifePlugin registerLife:APPLICATION_WILL_TERMINATE];
}
@end

Flutter

1. 使用 with LifeManageCall
2. 在 initState 方法中添加观察者

class WithTestPage extends StatefulWidget {
  const WithTestPage({Key? key}) : super(key: key);

  [@override](/user/override)
  _WithTestPageState createState() => _WithTestPageState();
}

class _WithTestPageState extends State<WithTestPage> with LifeManageCall {
  [@override](/user/override)
  void initState() {
    super.initState();
    LifeManage.instance!.addObserver(this);
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          title: const Text('WithTest'),
        ),
        body: Center(
          child: Column(),
        ));
  }

  [@override](/user/override)
  void onCreate() {
    print("onCreate=============");
  }

  [@override](/user/override)
  void onRestart() {
    print("onRestart=============");
  }

  [@override](/user/override)
  void applicationDidBecomeActive() {
    print("applicationDidBecomeActive=============");
  }

  [@override](/user/override)
  void applicationDidEnterBackground() {
    print("applicationDidEnterBackground=============");
  }
}

完整示例Demo

example/lib/main.dart

import 'package:app_life_example/with_test.dart';
import 'package:flutter/material.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatefulWidget {
  const MyApp({Key? key}) : super(key: key);

  [@override](/user/override)
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  [@override](/user/override)
  void initState() {
    super.initState();
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return const MaterialApp(home: WithTestPage());
  }
}