一段时间后，取消切换按钮 [英] Uncheck ToggleButton after some period of time

问题描述

我希望我的切换按钮是一段时间后，未选中，当我检查一下。我使用Timer和TimerTask但我的应用程序始终强制关闭当我试图做到这一点。这是code：

 公共类Vjezba5Activity延伸活动{TimerTask的TimerTask11;
定时器定时器1 =新的Timer（）;/ **当第一次创建活动调用。 * /
@覆盖
公共无效的onCreate（捆绑savedInstanceState）{
    super.onCreate（savedInstanceState）;
    的setContentView（R.layout.main）;    最后切换按钮TB1 =（切换按钮）findViewById（R.id.toggleButton1）;
    TB1.setOnClickListener（新OnClickListener（）{
        公共无效的onClick（视图v）{
            如果（TB1.isChecked（））{
                TimerTask11 =新的TimerTask（）{
                      公共无效的run（）{
                          TB1.setChecked（假）;
                      }
                  };
                  timer1.schedule（TimerTask11，1000）;
            }
            其他{
                Toast.makeText（Vjezba5Activity.this，取消选中Toast.LENGTH_SHORT）.show（）;
            }        }
    }）;
}
 

解决方案

您只能更新从主线程的用户界面。

尝试使用的处理程序。

  @覆盖
公共无效的onCreate（捆绑savedInstanceState）{
    super.onCreate（savedInstanceState）;
    的setContentView（R.layout.main）;    最后切换按钮TB1 =（切换按钮）findViewById（R.id.toggleButton1）;
    处理程序处理程序=新的处理程序（）;
    TB1.setOnClickListener（新OnClickListener（）{
        公共无效的onClick（视图v）{
            如果（TB1.isChecked（））{
                handler.postDelayed（新的Runnable（）{                    公共无效的run（）{
                         TB1.setChecked（假）;
                    }
                }，1000）;
            }
            其他{
                Toast.makeText（Vjezba5Activity.this，取消选中Toast.LENGTH_SHORT）.show（）;
            }        }
    }）;
}
 

I want my ToggleButton to be unchecked after some period of time when i check it. I am using Timer and TimerTask but my application always force close when i try to do this. This is the code:

public class Vjezba5Activity extends Activity {

TimerTask TimerTask11;
Timer timer1 = new Timer();

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    final ToggleButton TB1 = (ToggleButton) findViewById(R.id.toggleButton1);
    TB1.setOnClickListener(new OnClickListener() {
        public void onClick(View v) {
            if (TB1.isChecked()){
                TimerTask11 = new TimerTask() {
                      public void run() {
                          TB1.setChecked(false);
                      }
                  };
                  timer1.schedule(TimerTask11, 1000);
            }
            else {
                Toast.makeText(Vjezba5Activity.this, "Uncheck", Toast.LENGTH_SHORT).show();
            }

        }
    });
}

解决方案

You can only update the UI from the main thread.

Try using a handler.

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    final ToggleButton TB1 = (ToggleButton) findViewById(R.id.toggleButton1);
    Handler handler = new Handler();
    TB1.setOnClickListener(new OnClickListener() {
        public void onClick(View v) {
            if (TB1.isChecked()){
                handler.postDelayed(new Runnable() {

                    public void run() {
                         TB1.setChecked(false);
                    }
                }, 1000);
            }
            else {
                Toast.makeText(Vjezba5Activity.this, "Uncheck", Toast.LENGTH_SHORT).show();
            }

        }
    });
}

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