java - 未经检查的调用 'execute(Params...)' 作为原始类型 'android.os.AsyncTask' 的成员

Question

我正在关注 Udacity 上的 google android 教程，但在指定的代码中，我收到以下警告:

Unchecked Call to 'execute(Params...)' as a member of raw type 'android.os.AsyncTask'

关于此代码:

DoSomethingTask myTask = new DoSomethingTask();
myTask.execute(); // Warning here

DoSomethingTask:

public class DoSomethingTask extends AsyncTask {

    protected Object doInBackground(Object[] params) {
        ...
    }
}

谁能解释这个警告以及如何解决它？看来它应该按照说明工作......

Answer 1

警告是由任务的参数引起的。尝试使用:

extends AsyncTask<Void, Void, Void>{
    protected Object doInBackground() {
    }
}

或使用:

extends AsyncTask<Object, Void, Void>{
    protected Object doInBackground(Object[] params) {
    }
}
myTask.execute(anyObject);

解释:

This文档解释了 AsyncTask 的三种类型的含义。

1. Params, the type of the parameters sent to the task upon execution.

2. Progress, the type of the progress units published during the background computation.

3. Result, the type of the result of the background computation.