flutter

Flutter创建plugin package插件

Posted by アライさん on 2019年10月22日

通过plugin package调用原生页面，并接收返回参数

plugin插件包是一种特殊的package。

  • 普通的package包括pubspec.yaml和lib文件夹，提供dart代码。
    创建： 
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    flutter create --template=package mypackagename
  • plugin package是一种调用特定平台，通过platform channels和平台平台原生代码进行交互。
    创建： 
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    flutter create --org com.example --template=plugin -i swift -a kotlin mypackagename

ps.如果kotlin无法直接引用资源
kotlinx unresolved reference
在对应模块的build.gradle中增加
apply plugin: ‘kotlin-android-extensions’

  • 使用plugin package：
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    dependencies:
      flutter:
        sdk: flutter
      mypackagename:
        path: ./路径/
    工程目录下，直接使用./，平级目录下，使用../

具体代码可参见

https://gitee.com/alois/test_plugin_package


=============================================

简略代码

Flutter通过plugin package调用原生页面，并接收返回参数

  • flutter plugin部分
    test_plugin_package.dart 
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    /*
     * 接受arg0，arg1两个参数，调用原生TestPluginPackagePlugin的startActivity方法
     * */
     static Future<String> startActivity(String arg0, String arg1) async {
       final String activityFinishResult = await _channel
           .invokeMethod('startActivity', {"arg0": arg0, "arg1": arg1});
       return activityFinishResult;
     }
  • flutter plugin android原生部分
    TestPluginPackagePlugin.kt 
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    class TestPluginPackagePlugin(private val activity: Activity) : MethodCallHandler,
            PluginRegistry.ActivityResultListener {

        private val customRequestCode = 1032
        private var myResult: Result? = null

        companion object {
            @JvmStatic
            fun registerWith(registrar: Registrar) {
                val channel = MethodChannel(registrar.messenger(), "test_plugin_package")
                val plugin = TestPluginPackagePlugin(registrar.activity())
                //添加ActivityResultListener
                registrar.addActivityResultListener(plugin)
                channel.setMethodCallHandler(plugin)
            }
        }

        override fun onMethodCall(call: MethodCall, result: Result) {
            when(call.method){
                "getPlatformVersion" -> {
                    result.success("Android ${android.os.Build.VERSION.RELEASE}")
                }
                "startActivity" -> {
                    startActivity(call,result)
                }
                else -> {
                    result.notImplemented()
                }
            }
        }

        //打开activity
        private fun startActivity(call: MethodCall, result: Result){
            myResult = result
            val intent = Intent(activity, TempActivity::class.java)
            intent.putExtra("startKey0", call.argument<String>("arg0"))
            intent.putExtra("startKey1", call.argument<String>("arg1"))
            activity.startActivityForResult(intent, customRequestCode)
        }

        //接收activity的回调
        override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?): Boolean {
            if (requestCode == customRequestCode && resultCode == Activity.RESULT_OK) {
                val value = data?.getStringExtra("finishKey") ?: ""
                myResult?.success(value)
                return true
            }
            return false
        }
    }



Tags
flutter