Android 連接網絡時顯示進度條

public class HelloXML extends Activity {

private static final int MESSAGETYPE_01 = 0x0001;

private ProgressDialog progressDialog = null;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

this.setContentVIEw(R.layout.main);

progressDialog = ProgressDialog.show(HelloXML.this, "下載", "正在下載,請稍候!");

new Thread() {

public void run() {

try {

// 連接網絡獲取數據

} catch (Exception e) {

// 在GUI顯示錯誤提示

// tv.setText("Error: " + e.getMessage());

}

Message msg_listData = new Message();

msg_listData.what = MESSAGETYPE_01;

handler.sendMessage(msg_listData);

}

}.start();

}

private Handler handler = new Handler() {

public void handleMessage(Message message) {

switch (message.what) {

case MESSAGETYPE_01:

//刷新UI，顯示數據，並關閉進度條

progressDialog.dismiss(); //關閉進度條

break;

}

}

};

}