android中TextView显示问题

想在TextView中显示实时变化的数据，但是有数据，显示不更新，求大神帮忙啊。代码如下：
public void handleData(int device, float data) {//这个是被循环调用的回调函数
// TODO 自动生成的方法存根
float tmpValue = data;
int dev_flag = device;
Value = data;
try
{
CharSequence showdata = Float.toString(tmpValue);
tmpdata = showdata;

String str = Float.toString(tmpValue);
Log.e("回调数据：", str);
Message msg = new Message();
msg.what = 1;
mHandler.sendMessage(msg);
Thread.sleep(10);
//txtvImh01.setText(showdata);
}
catch (Exception e)
{

}




/////////////////////////////////////////////////
这个是显示数据的Handler
Handler mHandler = new Handler()
{
public void handleMessage(Message msg)
{
super.handleMessage(msg);
if(msg.what == 1)
{
try
{
String str = Float.toString(Value);
Log.e("发送数据：", str);


CharSequence showdata = Float.toString(data);

edit.setText(Float.toString(Value));


Thread.sleep(100);
}
catch (Exception e)
{

}
}

//mHandler.postDelayed(mgetDataRun, 10);
}

};