android - 使特定代码在后台运行

Question

我想让这段代码在后台运行。正如大多数人指出的那样，我不知道如何创建服务或 Asynstask，因为它只需要是这段代码，而不是其他所有内容。

void StartTimer()
{
    int minsTicks=CountM*60*1000;
    int hoursTicks=CountT*60*60*1000;
    int totalTicks=hoursTicks+minsTicks;
    mTextField = (TextView) findViewById(R.id.TimerTextView);

    CountDownTimer aCounter = new CountDownTimer(totalTicks, 1000)
    {
         public void onTick(long millisUntilFinished) 
         {
             mTextField.setText("seconds remaining: " + millisUntilFinished / 1000);
         }
         public void onFinish() 
         {
            try 
            {
            mTextField.setText("Kaffe Maskinen er igang");
            mmOutputStream.write('2');
            Thread.sleep(900000);
            mmOutputStream.write('0');
            mTextField.setText("Kaffe Maskinen er slukket");
            } 
            catch (IOException e) {} catch (InterruptedException e) {}
         }
    };
     aCounter.start();
}

Answer 1

这是 AsyncTask 的代码 fragment

private class AsyncTaskEx extends AsyncTask<Void, Void, Void> {

    /** The system calls this to perform work in a worker thread and
    * delivers it the parameters given to AsyncTask.execute() */
    @Override
    protected Void doInBackground(Void... arg0) {
        StartTimer();//call your method here it will run in background
        return null;
    }

    /** The system calls this to perform work in the UI thread and delivers
    * the result from doInBackground() */
    @Override
    protected void onPostExecute(Void result) {
        //Write some code you want to execute on UI after doInBackground() completes
        return ;
    }

    @Override
    protected void onPreExecute() {
        //Write some code you want to execute on UI before doInBackground() starts
        return ;
    }
}

在你的 Activity 中编写这个类并调用你想要执行你的方法的地方

new AsyncTaskEx().execute();