Question

我一直试图在Android上运行后台服务。但是Android一直告诉我，尽管我正确处理了导入，却找不到startForeground()。

package com.example.helloservice;

import android.app.Notification;
import android.content.ContextWrapper;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.BatteryManager;
import android.os.Build.VERSION;
import android.os.Build.VERSION_CODES;
import android.os.Bundle;
import android.app.PendingIntent;
import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.app.Activity;
import android.view.View;
import android.os.IBinder;
import android.util.Log;
import android.app.Service;


import io.flutter.app.FlutterActivity;
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;
import io.flutter.plugins.GeneratedPluginRegistrant;

public class MainActivity extends FlutterActivity {
  private static final String CHANNEL = "samples.flutter.io/battery";

  Intent i = new Intent(this, HelloService.class);
  Intent notificationIntent = new Intent(this, MainActivity.class);
  PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, notificationIntent, 0);

  Notification notification = new Notification.Builder(this).setContentTitle("My Awesome")
      .setContentText("Doing some work").setContentIntent(pendingIntent).build();

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    GeneratedPluginRegistrant.registerWith(this);
    // createNotificationChannel();
    new MethodChannel(getFlutterView(), CHANNEL).setMethodCallHandler(new MethodCallHandler() {
      @Override
      public void onMethodCall(MethodCall call, Result result) {
        if (call.method.equals("getBatteryLevel")) {
          int batteryLevel = getBatteryLevel();
          if (batteryLevel != -1) {
            result.success(batteryLevel);

            startService(i);
            startForeground(1337, notification);

..

  }
}

如果有帮助，我已经将gradle编译版本设置为> 27，并且清单已使用service标签设置。

这是通过使用Flutter的平台代码完成的，我尝试启动一个无法解决问题的新项目。

Flutter / Android无法找到符号startForeground（）

0 个答案: