Java 如何在活动中显示asynctask值

Java 如何在活动中显示asynctask值,java,android,android-asynctask,Java,Android,Android Asynctask,我不想使用async tack在活动中显示值。异步任务的代码是: private class BackgroundGetSignal extends AsyncTask<String, Void, Void> { private TextView name; //private TextView latitudeField; //private TextView longitudeField; //private TextView placeName;

我不想使用async tack在活动中显示值。异步任务的代码是:

private class BackgroundGetSignal extends AsyncTask<String, Void, Void> {
    private TextView name;
    //private TextView latitudeField;
    //private TextView longitudeField;
    //private TextView placeName;

    Double lat;
    Double longit;
    String addre;
    MyService myService;
    private Intent i;
    private Context context;

    public BackgroundGetSignal(Context context) {
        this.context = context;
    }

    @Override
    protected void onPreExecute() {
        super.onPreExecute();
    }

    @Override
    protected Void doInBackground(String[] o) {
        myService = new MyService();
        if (myService.canGetLocation()) {
            lat = myService.getLatitude();
            longit = myService.getLongitude();
            addre = myService.getAddress();
        }
        return null;

    }


    @Override
    protected void onPostExecute(Void result) {
        latitudeField = (TextView) findViewById(R.id.txtLatitude);
        longitudeField = (TextView) findViewById(R.id.txtLongitude);
        placeName = (TextView) findViewById(R.id.txtLocation);

        latitudeField.setText(lat.toString());
        longitudeField.setText(longit.toString());
        placeName.setText(addre);

    }
}

但应用程序正在崩溃。请有人告诉我我做错了什么。

最好的方法是在onPostExecute()方法中提供try-catch,并将ui更新代码移动到try块。因为在onPostExecute()执行时,如果活动不在前台,则有可能发生异常。如果发布崩溃日志,将有助于对问题进行详细分析。

为isuue添加错误日志。发布的代码不正确:文本视图被注释掉。给您一个如何在AsyncTask中良好运行的提示:使用回调接口在
onPostExecuted
中传递计算值,并在AsyncTask执行类中实现这些接口以获取传递的值。您遇到了什么异常?
new BackgroundGetSignal(this).execute();