Flutter与Android的混合跳转和通信

import android.content.Intent
import io.flutter.embedding.android.FlutterActivity
import io.flutter.plugin.common.MethodChannel
 
class MainActivity: FlutterActivity() {
    private val CHANNEL = "samples.flutter.dev/battery"
 
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        MethodChannel(flutterView, CHANNEL).setMethodCallHandler { call, result ->
            if (call.method == "getBatteryLevel") {
                val batteryLevel: Int = getBatteryLevel()
                if (batteryLevel != -1) {
                    result.success(batteryLevel)
                } else {
                    result.error("UNAVAILABLE", "Battery level not available", null)
                }
            } else {
                result.notImplemented()
            }
        }
    }
 
    private fun getBatteryLevel(): Int {
        val batteryLevel: Int = Intent(Intent.ACTION_BATTERY_SAVER_SETTINGS).let { intent ->
            return@let registerForActivityResult(StartActivityForResult()) {
                if (it.resultCode == Activity.RESULT_OK) {
                    // 处理正常跳转后的逻辑
                }
            }.launch(intent)
        }
        return batteryLevel
    }
}

这个代码示例展示了如何在Flutter与Android混合开发的项目中，通过MethodChannel来实现Flutter页面向Android页面发起的请求，并处理回调。其中getBatteryLevel方法展示了启动一个系统设置的例子，并处理了回调。这是一个很好的学习资源，对于了解混合架构下的页面跳转和通信非常有帮助。