常常需要在登錄,發送或者其他時候需要等待網絡,爲了增加用戶體驗,這裏使用了ProgressDialog
下面直接放代碼
ProgressDialog dialog;//新建一個ProgressDialog
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.database);
dialog = ProgressDialog.show(this, "Loading...","Please wait..."); //彈出ProgressDialog
new login().start();//開始後臺做你要做的事情
}
class login extends Thread{
public void run()
{
//你要做的事情
message.what = 0; //做完後發個通知,關掉ProgressDialog和做些後續工作
mHandler.sendMessage(message);
}
}
private Handler mHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
// TODO Auto-generated method stub
if(msg.what==0)//接收到通知後
{
Toast.makeText(getApplicationContext(), "hello world!",Toast.LENGTH_SHORT).show();
}
if (dialog.isShowing()) { //如果ProgressDialog爲打開狀態,則關閉
dialog.dismiss();
}
}
};
這代碼直接可以出現的效果如上圖所示