android 创办水平进度条

pbForCell = new ProgressBar(this.ctx,null,android.R.attr.progressBarStyleHorizontal);


??? public void onCreate(Bundle savedInstanceState) {
??????? super.onCreate(savedInstanceState);
??????? LinearLayout ly = new LinearLayout(this);
??????? LinearLayout.LayoutParams paramsMain = new LinearLayout.LayoutParams(200,10);
??????? paramsMain.topMargin = 10;
??????? paramsMain.leftMargin = 10;
??????? ProgressBar pb = new ProgressBar(this,null,android.R.attr.progressBarStyleHorizontal);
??????? pb.setProgress(30);
??????? ly.addView(pb,paramsMain);
??????? setContentView(ly);
??? }