如何将数据从 Activity 发送回 AccessibilityService?

问题描述

我有一个扩展 AccessibilityService 的类，当有某个事件时会启动一个活动.

I have a class that extends AccessibilityService and when there is a certain event starts an activity.

问题是当活动结束时，它应该将数据发送回AccessibilityService".有没有人知道如何做到这一点?

The problem is that when the activity ends, it should send data back to 'AccessibilityService'. Does anyone have an idea on how to do that?

示例:

public class MyAccessibilityService extends AccessibilityService {

    @Override
    public void onAccessibilityEvent(AccessibilityEvent event) {

        if (event.getEventType()==AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED){
                Intent intent=new Intent(getApplicationContext(),DialogActivity.class);
                intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

                startActivity(intent);
                // String resul=set result When Activity is closed
        }
    }

提前致谢！

推荐答案

AccesibilityService 是从 Service 类继承的类.所以我们可以参考这个问题:如何让 Android Service 与 Activity 通信

AccesibilityService is an inherited class from Service class. So we can refer that question to this:How to have Android Service communicate with Activity

解决您问题的最简单方法:

The easiest way for your question:

1) 在 Activity 的 onDestroy() 方法中调用 startService():

1) Call startService() in your Activity's onDestroy() method:

@Override
    protected void onDestroy() {
        super.onDestroy();
        Intent intent = new Intent(getApplicationContext(), MyAccessibilityService.class);
        intent.putExtra("data","yourData");
        startService(intent);
    }

2) 覆盖您的 MyAccessibilityService 的 onStartCommand() 方法:

2) Override your MyAccessibilityService's onStartCommand() method:

 @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        super.onStartCommand(intent, flags, startId);
        String data="";
        if(intent.getExtras().containsKey("data"))
            data = intent.getStringExtra("data");
        return START_STICKY;
    }

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