android 网络异步加载数据进度条

ProgressDialog progressDialog = null;

public static final int MESSAGETYPE = 0;

private void execute() {

try {

// String dropList = requestCmd("474");

progressDialog = ProgressDialog.show(Balance.this.getParent(),
"请稍等...", "数据正在加载中......", true);
new Thread(new Runnable() {

@Override
public void run() {

//请求网络数据加载实现代码

Message msg_netData = new Message();

msg_netData.obj = dropList;//传送数据
msg_netData.what = MESSAGETYPE;

operate.sendMessage(msg_netData);
}
}).start();

} catch (Exception e) {
e.printStackTrace();
}
}

private Handler operate = new Handler() {

@Override
public void handleMessage(Message msg) {
// TODO Auto-generated method stub
switch (msg.what) {
case MESSAGETYPE:
progressDialog.dismiss();
break;

default:

break;
}

}

};

线程通信必须放在线程内，否则不会提前弹出进步条，也就是下嘛这段代码必须放在线程内

Message msg_netData = new Message();
msg_netData.obj = dropList;
operate.sendMessage(msg_netData);

如果放在线程外，只会等到所有的数据加载完后同步到界面上显示。

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