在程序加载过程中显示ProgressDialog 对话框

 

    private ProgressDialog mProgressDlg = null; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main);
 //---开始显示ProgressDialog对话框 mProgressDlg = ProgressDialog.show(this, "提示", "正在在加载", true);
 //----通过线程模拟加载任务
        new Thread(){ public void run() { try { Thread.sleep(5000); //---加载完成后必须Progress 对话框
 mProgressDlg.dismiss(); } catch(Exception ex) { ex.printStackTrace(); } } }; }