如何停止正在运行的AsyncTask

网上查到的最好的办法

public class MyTask extends AsyncTask {


    private volatile boolean running = true;

    private final ProgressDialog progressDialog;


    public MyTask(Context ctx) {

        progressDialog = gimmeOne(ctx);


        progressDialog.setCancelable(true);

        progressDialog.setOnCancelListener(new OnCancelListener() {

            @Override

            public void onCancel(DialogInterface dialog) {

                // actually could set running = false; right here, but I'll

                // stick to contract.

                cancel(true);

            }

        });


    }


    @Override

    protected void onPreExecute() {

        progressDialog.show();

    }


    @Override

    protected void onCancelled() {

        running = false;

    }


    @Override

    protected Void doInBackground(Void... params) {


        while (running) {

            // does the hard work

        }

        return null;

    }


    // ...


}