ProgressDialog写法

例子:

ProgressDialog pd;
@Override
public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        pd=new ProgressDialog(WebviewActivity.this);
        pd.setProgressStyle(ProgressDialog.STYLE_SPINNER);
        pd.setMessage("数据载入中，请稍候！");
        //显示进度条
        pd.show();
        //pd.hide();//隐藏进度条,下次调用无问题
        //或者pd.dismiss();关闭进度条,下次调用show, 进度条将静止不动
        //或者pd.cancel();关闭进度条,下次调用show, 进度条将静止不动
}