android - 如何将数据从 Activity 发送回 AccessibilityService？

Question

我有一个扩展 AccessibilityService 的类，当有特定事件时会启动一个 Activity 。

问题是当 Activity 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？

例子:

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!

Answer 1

AccessibilityService 是Service 类的继承类。所以我们可以引用这个问题: How to have Android Service communicate with Activity

您问题的最简单方法:

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

@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:

 @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;
    }