flutter如何调用用kotlin编写的检查是否生成App桌面快捷方式和自动生成APP桌面快捷方式

要调用Kotlin编写的检查是否生成App桌面快捷方式和自动生成APP桌面快捷方式，需要使用Flutter的Platform Channel机制。具体步骤如下：

1. 在Flutter项目中创建一个Platform Channel，用于与Kotlin代码进行通信。

import 'package:flutter/services.dart';

const platform = const MethodChannel('com.example.appshortcutchannel');

Future<bool> checkAppShortcut() async {
  try {
    final bool result = await platform.invokeMethod('checkAppShortcut');
    return result;
  } on PlatformException catch (e) {
    print("Failed to check app shortcut: ${e.message}");
    return false;
  }
}

Future<void> generateAppShortcut() async {
  try {
    await platform.invokeMethod('generateAppShortcut');
  } on PlatformException catch (e) {
    print("Failed to generate app shortcut: ${e.message}");
  }
}

在上面的代码中，我们定义了一个名为“com.example.appshortcutchannel”的MethodChannel，并定义了两个方法，checkAppShortcut和generateAppShortcut，用于检查是否生成App桌面快捷方式和自动生成APP桌面快捷方式。

2. 在Kotlin代码中实现Platform Channel。

package com.example.myapp

import android.content.Context
import android.content.Intent
import android.content.pm.PackageManager
import android.os.Build
import androidx.annotation.NonNull
import androidx.annotation.RequiresApi
import io.flutter.embedding.engine.plugins.FlutterPlugin
import io.flutter.embedding.engine.plugins.PluginRegistry
import io.flutter.plugin.common.MethodCall
import io.flutter.plugin.common.MethodChannel
import io.flutter.plugin.common.MethodChannel.MethodCallHandler
import io.flutter.plugin.common.MethodChannel.Result

class AppShortcutPlugin : FlutterPlugin, MethodCallHandler {

    private var methodChannel: MethodChannel? = null
    private var context: Context? = null

    @RequiresApi(Build.VERSION_CODES.N_MR1)
    override fun onAttachedToEngine(@NonNull flutterPluginBinding: FlutterPlugin.FlutterPluginBinding) {
        context = flutterPluginBinding.applicationContext
        methodChannel = MethodChannel(flutterPluginBinding.binaryMessenger, "com.example.appshortcutchannel")
        methodChannel?.setMethodCallHandler(this)
    }

    override fun onDetachedFromEngine(@NonNull binding: FlutterPlugin.FlutterPluginBinding) {
        methodChannel?.setMethodCallHandler(null)
        methodChannel = null
        context = null
    }

    override fun onMethodCall(@NonNull call: MethodCall, @NonNull result: Result) {
        if (call.method == "checkAppShortcut") {
            result.success(hasAppShortcut())
        } else if (call.method == "generateAppShortcut") {
            generateAppShortcut()
            result.success(null)
        } else {
            result.notImplemented()
        }
    }

    private fun hasAppShortcut(): Boolean {
        val shortcutIntent = Intent(context, MainActivity::class.java)
        shortcutIntent.action = Intent.ACTION_VIEW

        val shortcut = Intent()
        shortcut.putExtra(Intent.EXTRA_SHORTCUT_INTENT, shortcutIntent)
        shortcut.putExtra(Intent.EXTRA_SHORTCUT_NAME, "My App")
        shortcut.putExtra(Intent.EXTRA_SHORTCUT_ICON_RESOURCE, Intent.ShortcutIconResource.fromContext(context, R.drawable.app_icon))
        shortcut.action = "com.android.launcher.action.INSTALL_SHORTCUT"

        return PackageManagerCompat.checkSelfPermission(context!!, Manifest.permission.INSTALL_SHORTCUT) == PackageManager.PERMISSION_GRANTED && ShortcutManagerCompat.requestPinShortcut(context!!, shortcut, null)
    }

    @RequiresApi(Build.VERSION_CODES.N_MR1)
    private fun generateAppShortcut() {
        if (hasAppShortcut()) {
            return
        }
        val shortcutIntent = Intent(context, MainActivity::class.java)
        shortcutIntent.action = Intent.ACTION_VIEW

        val shortcut = Intent()
        shortcut.putExtra(Intent.EXTRA_SHORTCUT_INTENT, shortcutIntent)
        shortcut.putExtra(Intent.EXTRA_SHORTCUT_NAME, "My App")
        shortcut.putExtra(Intent.EXTRA_SHORTCUT_ICON_RESOURCE, Intent.ShortcutIconResource.fromContext(context, R.drawable.app_icon))
        shortcut.action = "com.android.launcher.action.INSTALL_SHORTCUT"

        ShortcutManagerCompat.requestPinShortcut(context!!, shortcut, null)
    }
}

在上面的代码中，我们实现了FlutterPlugin和MethodCallHandler接口，并重写了onAttachedToEngine、onDetachedFromEngine和onMethodCall方法，用于初始化Platform Channel和处理Flutter端发送的请求。

3. 在Flutter项目中注册Platform Channel。

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';

import 'package:myapp/app_shortcut_plugin.dart';

void main() {
  runApp(MyApp());
  // Register platform channel
  AppShortcutPlugin().registerWith(WidgetsFlutterBinding.instance!.platformViewRegistry);
}

在上面的代码中，我们在main函数中注册了AppShortcutPlugin插件。

现在，我们就可以在Flutter项目中调用checkAppShortcut和generateAppShortcut方法了。

if (await checkAppShortcut()) {
  print('App shortcut exists');
} else {
  await generateAppShortcut();
}
``