问Android:后台更新TableLayout

EN

<TableLayout
  android:id="@+id/pidata"
  android:layout_width="wrap_content"
  android:layout_height="match_parent">
</TableLayout>

public static TableLayout piTableLayout; 
public static HashSet<PIModel> PiData; 

piTableLayout = (TableLayout)findViewById(R.id.pidata);

while (isRunning) {
    PiData = getPiData();
    piTableLayout.removeAllViews();

    for (PIModel model : PiData) {   
        TableRow row = new TableRow(this);

        TableRow.LayoutParams rowParams = new TableRow.LayoutParams();
        rowParams.setMargins(0, -4, 0, -4);
        rowParams.height = 40;

        TextView pointNameText = new TextView(this);
        pointNameText.setText(model.getAttributeName());
        pointNameText.setGravity(Gravity.LEFT);
        pointNameText.setLayoutParams(rowParams);
        pointNameText.setTextColor(Color.parseColor("white"));
        pointNameText.setTypeface(null, Typeface.BOLD);
        pointNameText.setPadding(0, 0, 10, 0);

        TextView valueText = new TextView(this);
        valueText.setText(model.getValue());
        valueText.setLayoutParams(rowParams);
        valueText.setTextColor(Color.parseColor("white"));
        valueText.setPadding(0, 0, 10, 0);

        piTableLayout.addView(row);
        row.addView(pointNameText);
        row.addView(valueText);
    }

    try {
        Thread.sleep(3000);
    } 
    catch (InterruptedException ex) {
    }
}

Handler piHandler = new Handler();
Runnable piRunnable = new Runnable() {
    @Override
    public void run() {
        while (isRunning) {
            piHandler.post(new Runnable() {
                @Override
                public void run() {
                    //logic to add to TableLayout
                }
            });
            try {
                Thread.sleep(3000);
            } 
            catch (InterruptedException ex) {
            }
        }   
    }           
};
new Thread(piRunnable).start();