Android 进度对话框 ProgressDialog

    protected void oncreate(bundle savedinstancestate) {
        super.oncreate(savedinstancestate);
        setcontentview(r.layout.activity_main);

        button = (button) findviewbyid(r.id.button);
        button.setonclicklistener(new onclicklistener() {

            @override
            public void onclick(view v) {
                // todo auto-generated method stub

                // progressdialog.show(mainactivity.this, "提示", "正在加载，请稍后...");
                progressdialog dialog = new progressdialog(mainactivity.this);
                dialog.settitle("提示");
                dialog.setmessage("正在加载，请稍后...");
                dialog.show();
            }
        });
    }