flutter

Flutter直接调用原生页面，并接收返回参数

Posted by アライさん on 2019年10月22日

可参考 “Flutter 创建plugin package插件” 条目

  • flutter 部分 
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import 'package:flutter/services.dart';
 //通道名称为samples.flutter.io/battery，和android原生中接收的一样
 static const platform = const MethodChannel('samples.alois.test_channel');
 String result = await platform.invokeMethod('action1',['arg0',2]);
  • flutter android原生部分
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class MainActivity : FlutterActivity() {
    //通道名称为samples.flutter.io/battery，和flutter中的一样
    private val channelName = "samples.alois.test_channel"

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

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {//API>21,设置状态栏颜色透明
            window.statusBarColor = 0
        }
        GeneratedPluginRegistrant.registerWith(this)
        //通过通道监听对应名字的方法
        MethodChannel(flutterView, channelName).setMethodCallHandler { methodCall, result ->
            myResult = result
            if (methodCall.method == "action1") {
                try {
                    val args = methodCall.arguments<Any>() as List<Any>
                    startActivity(args[0] as String, args[1] as Int)
                } catch (e: Exception) {
                }

            } else {
                result.notImplemented()
            }
        }

    }

    //    打开activity
    private fun startActivity( arg0:String, arg1:Int) {
        val intent = Intent(this, TempActivity::class.java)
        intent.putExtra("startKey0",arg0)
        intent.putExtra("startKey1", arg1)
        this.startActivityForResult(intent, customRequestCode)
    }

    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
        super.onActivityResult(requestCode, resultCode, data)

        if (requestCode == customRequestCode && resultCode == Activity.RESULT_OK) {
            val value = data?.getStringExtra("finishKey") ?: ""
            myResult?.success(value)
        }
    }
}



Tags
flutter