Question

我正在使用AsyncTask类，但我将它用作公共类。我想在完成执行后运行一些代码，但我无法弄清楚如何在类之外执行它。例如：

exampleAsyncTaskClass.execute(params); 
//What can I write here to execute code after the AsyncTask is completed

无论如何，我可以在任务完成后执行代码而不使用受保护的onPostExecute方法。或者有没有办法可以让这种方法不受保护？

Answer 1

您可以将处理程序传递给任务的构造函数，并在任务完成时调用它。

看起来像这样：

public class SomeTask extends AsyncTask<Object, Object, Object>{

    private OnPostExecuteHandler handler;

    public SomeTask(OnPostExecuteHandler handler) {
        this.handler = handler;
    }

    @Override protected Object doInBackground(Object... params) {
        return null;
    }

    @Override protected void onPostExecute(Object o) {
        handler.runOnFinish();
    }

    public interface OnPostExecuteHandler{
        void runOnFinish();
    }
}

用法：

new SomeTask(new SomeTask.OnPostExecuteHandler() {
    @Override public void runOnFinish() {
        //will be called when the task is finished
    }
}).execute(someParams);

Answer 2

你可以做这样的事情......

public class Myclass{
boolean isTaskFinished;
if(isfinsihed){
//execute some code
}

ExampleTask exampe=new ExampleTask();
example.execute;



class ExampleTask extends AsyncTask<Object, Object, Object>{
private OnPostExecuteHandler handler;

public ExampleTask (OnPostExecuteHandler handler) {
    this.handler = handler;
}

@Override protected Object doInBackground(Object... params) {
    return null;
}

@Override protected void onPostExecute(Object o) {
    handler.runOnFinish();
}

public interface OnPostExecuteHandler{
    void runOnFinish();
isFinished=true:
    }
}



}

public onPostExecute方法

2 个答案: