UPDATE1

活动：

 公共整数_number = 0;
@覆盖
    公共无效的onCreate（包savedInstanceState）{
如果（_number大于0）
        {
            Log.d（onSuccessfulExecute，+ _number）;
        }
        其他
        {
            Log.d（onSuccessfulExecute，不空的歌曲清单）;
        }
}

公众诠释onSuccessfulExecute（INT numberOfSongList）{

_number = numberOfSongList;

如果（numberOfSongList大于0）
{
    Log.d（onSuccessfulExecute，+ numberOfSongList）;
}
其他
{
    Log.d（onSuccessfulExecute，不空的歌曲清单）;
}
    返回numberOfSongList;
}
 

末UPDATE1

更新：。AsynchTask有它自己的外部类

如何从AsyncTask的onPostExecute（）...传递价值的活动。

我的code并返回从onPostExecute（值）和更新用户界面，但我正在寻找一种方法来设置活动变量（NumberOfSongList ）从AsynchTask未来

的AsyncTask类：

  @覆盖
    公共无效onPostExecute（asynctask.Payload有效载荷）
    {
         AsyncTemplateActivity应用=（AsyncTemplateActivity）payload.data [0];

             //下面code会更新用户界面TextView控件
             INT答案=（（整数）payload.result）.intValue（）;
             app.taskStatus.setText（成功：回答=+答案）;

            //问题：
            //我试图填充值的变量，但似乎并不喜欢的方式我这样做：
            app.NumberOfSongList = payload.answer;
            ..............
            ..............
    }
 

活动：

 公共整数NumberOfSongList;
    公共无效的onCreate（包savedInstanceState）{
        super.onCreate（savedInstanceState）;
        的setContentView（R.layout.main）;

        //一些UI code
        新ConnectingTask（）执行（）。
        Log.d（的onCreate，+ NumberOfSongList）;

    }
 

解决方案

有关使用setter方法​​是什么？例如，

 私人诠释_number;
公众诠释setNumber（INT编号）{
    _number =号;
}
 

更新：的

请看看这个code。这会做你想要完成的任务。

活动类

 公共类TestActivity延伸活动{
    公众诠释号码;

    @覆盖
    保护无效的onCreate（包savedInstanceState）{
        // TODO自动生成方法存根
        super.onCreate（savedInstanceState）;

        的setContentView（R.layout.test）;

        按钮btnDisplay =（按钮）findViewById（R.id.btnDisplay）;
        btnDisplay.setOnClickListener（新OnClickListener（）{

            公共无效的onClick（视图v）{
                吐司面包= Toast.makeText（v.getContext（）生成的号码：+将String.valueOf（号码），Toast.LENGTH_LONG）;
                toast.show（）;
            }
        }）;

        新TestTask（本）.execute（）;
    }
}
 

的AsyncTask类

 公共类TestTask扩展的AsyncTask＆LT;虚空，虚空，整数GT; {
    私人最终语境_context;
    私人最终字符串变量=TestTask;
    私人最终随机_rnd;

    公共TestTask（上下文的背景下）{
        _context =背景;
        _rnd =新的随机（）;
    }

    @覆盖
    在preExecute保护无效（）{
        // TODO：做任务初始化。
        super.on preExecute（）;
    }

    @覆盖
    保护整数doInBackground（空... PARAMS）{
        //模拟一个长期运行的程序。
        尝试 {
            视频下载（3000）;
        }赶上（InterruptedException异常E）{
            Log.e（TAG，e.getMessage（））;
        }

        返回_rnd.nextInt（）;
    }

    @覆盖
    保护无效onPostExecute（整数结果）{
        TestActivity测试=（TestActivity）_context;
        test.Number =结果;
        super.onPostExecute（结果）;
    }
}
 

Update1

activity:

public Integer _number = 0;
@Override
    public void onCreate(Bundle savedInstanceState) {
if (_number >0)
        {
            Log.d("onSuccessfulExecute", ""+_number);
        }
        else
        {
            Log.d("onSuccessfulExecute", "nope empty songs lists");
        }
}

public int onSuccessfulExecute(int numberOfSongList) {

_number = numberOfSongList;

if (numberOfSongList >0)
{
    Log.d("onSuccessfulExecute", ""+numberOfSongList);
}
else
{
    Log.d("onSuccessfulExecute", "nope empty songs lists");
}
    return numberOfSongList;
}

end Update1

UPDATE: AsynchTask has its own external class.

How to pass an value from AsyncTask onPostExecute()... to activity

my code does returning value from onPostExecute() and updating on UI but i am looking for a way to set the activity variable (NumberOfSongList) coming from AsynchTask.

AsyncTask class:

@Override
    public void onPostExecute(asynctask.Payload payload)
    {  
         AsyncTemplateActivity app = (AsyncTemplateActivity) payload.data[0];

             //the below code DOES UPDATE the UI textView control
             int answer = ((Integer) payload.result).intValue();
             app.taskStatus.setText("Success: answer = "+answer);

            //PROBLEM:
            //i am trying to populate the value to an variable but does not seems like the way i am            doing:
            app.NumberOfSongList = payload.answer;
            ..............
            ..............
    }

Activity:

  public Integer NumberOfSongList;
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main); 

        //Several UI Code   
        new ConnectingTask().execute();
        Log.d("onCreate", ""+NumberOfSongList);

    } 

What about using a setter method? e.g.

private int _number;
public int setNumber(int number) {
    _number = number;
}

UPDATE:

Please look at this code. This will do what you're trying to accomplish.

Activity class

public class TestActivity extends Activity {
    public int Number;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);

        setContentView(R.layout.test);

        Button btnDisplay = (Button) findViewById(R.id.btnDisplay);
        btnDisplay.setOnClickListener(new OnClickListener() {

            public void onClick(View v) {
                Toast toast = Toast.makeText(v.getContext(), "Generated number: " + String.valueOf(Number), Toast.LENGTH_LONG);
                toast.show();               
            }
        });

        new TestTask(this).execute();
    }
}

AsyncTask class

public class TestTask extends AsyncTask<Void, Void, Integer> {
    private final Context _context;
    private final String TAG = "TestTask";
    private final Random _rnd;

    public TestTask(Context context){
        _context = context;
        _rnd = new Random();
    }

    @Override
    protected void onPreExecute() {
        //TODO: Do task init.
        super.onPreExecute();
    }

    @Override
    protected Integer doInBackground(Void... params) {
        //Simulate a long-running procedure.
        try {
            Thread.sleep(3000);         
        } catch (InterruptedException e) {
            Log.e(TAG, e.getMessage());
        }

        return _rnd.nextInt();
    }

    @Override
    protected void onPostExecute(Integer result) {
        TestActivity test = (TestActivity) _context;
        test.Number = result;       
        super.onPostExecute(result);
    }
}