java - 如何从扩展 JobService 的类中调用将视图作为参数的 MainActivity 方法？

Question

我想执行 MainActivity 中的这个方法...

public void checkNow(View view) {
        new Thread(() -> {

            //codes...

            EditText getSite = findViewById(R.id.site);
            site = getSite.getText().toString();

            //codes...

            Toast.makeText(this, "Connecting...", Toast.LENGTH_SHORT).show();

            new MovieAsyncTask().execute(movie, url, site);

        }).run();
    }

...来自以下班级

public class MovieUpdatesService extends JobService {

    private static final String TAG = "MovieUpdatesService";
    private boolean jobCancelled = false;

    @Override
    public boolean onStartJob(JobParameters params) {
        Log.d(TAG, "Job started");
        doBackgroundWork(params);
        return true;
    }

    public void doBackgroundWork(final JobParameters params) {
        if (jobCancelled)
            return;

        //call checkNow() method here

        Log.d(TAG, "Job finished");
        jobFinished(params, false);
    }

    @Override
    public boolean onStopJob(JobParameters params) {
        Log.d(TAG, "Job cancelled before completion");
        jobCancelled = true;
        return true;
    }
}

我想打电话checkNow(View view)，但我不知道如何从这个类访问这些视图。我试过使用interface，但我不明白如何让它在我的情况下工作。我是android新手，所以如果可能的话，我正在寻找一个简单的解决方案

Answer 1

为了让您的服务保存 textview 的值，您可以添加一个成员变量。然后你可以为这个字符串公开一个 setter 方法。

public class MovieUpdatesService extends JobService {

private static final String TAG = "MovieUpdatesService";
private boolean jobCancelled = false;
private String siteDetails = "";  <----

//Use this method from the Activity
public void setSiteDetails(String _siteDetails) {
  siteDetails = _siteDetails
}

@Override
public boolean onStartJob(JobParameters params) {
    Log.d(TAG, "Job started");
    doBackgroundWork(params);
    return true;
}

public void doBackgroundWork(final JobParameters params) {
    if (jobCancelled)
        return;

    //use siteDetails here

    Log.d(TAG, "Job finished");
    jobFinished(params, false);
}

@Override
public boolean onStopJob(JobParameters params) {
    Log.d(TAG, "Job cancelled before completion");
    jobCancelled = true;
    return true;
  }
}