Question

我如何在Textview中连续显示小时分钟和秒钟，因为我使用的是动态线性布局。这种格式适用于静态布局但不适用于动态布局请帮助我谢谢？

列出项目

public class ButtonActivity extends Activity {

Button b;
ScrollView scrollview;    
int count = 4;`enter code here`
private int mHour,mMinute,mSecond; 
int min,hr,sec;
private Handler mHandler = new Handler();

public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_button);     
  Runnable mUpdate = new Runnable() {
      @Override
      public void run() {
      Calendar c = Calendar.getInstance();
      mHour = c.get(Calendar.HOUR_OF_DAY);
      mMinute = c.get(Calendar.MINUTE);
      mSecond = c.get(Calendar.SECOND);
      min = mMinute;
      hr = mHour;
      sec = mSecond;
      String timeSet = "";

      if (hr > 12) {
        hr -= 12;
        timeSet = "PM";
      } else if (hr == 0) {
        hr += 12;
        timeSet = "AM";
      } else if (hr == 12)
        timeSet = "PM";
        else
        timeSet = "AM";          
        String minutes = "";
        if (min < 10)
        minutes = "0" + min;
        else
        minutes=String.valueOf(min);                
        String secs = "";
        if (sec < 10)
        secs = "0" + sec;
        else
        secs = String.valueOf(sec);


        mHandler.postDelayed(this, 1000);

        }
     };

       mHandler.post(mUpdate);            
       scrollview = new ScrollView(this);
       LinearLayout linearlayout = new LinearLayout(this);
     linearlayout.setOrientation(LinearLayout.VERTICAL);             
     scrollview.addView(linearlayout);          
     TextView t = new TextView(this); 

   t.setText(hr + ":" + minutes + ":" + secs+""+timeSet);           
  linearlayout.addView(t);       
  for(int i = 0; i<count;i++)
  {
   LinearLayout linear1 = new LinearLayout(this);
      linear1.setOrientation(LinearLayout.HORIZONTAL);
      linearlayout.addView(linear1);              
      b = new Button(this);
      b.setText(""+i);
      b.setId(i);
      b.setTextSize(10);
      b.setPadding(8, 3, 8, 3);
      b.setTypeface(Typeface.SERIF,Typeface.BOLD_ITALIC);
      b.setLayoutParams(newLayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT));            
      linear1.addView(b);                            
  }                
  this.setContentView(scrollview);

}
}

Answer 1

你必须在TextView 里面调用setText（）你的Runnable run（）方法。现在的方式是文本只在创建活动时设置一次。

时钟和动态布局

1 个答案: