Activity，Service属于主线程，在主线程中才能更新UI，如toast等。其他线程中不能直接使用，否则产生 Can't create handler inside thread that has not called Looper.prepare()的错误，这时可以使用Handler来处理，Handler可以在Activity和Service中。
功能：当在非UI线程中调用CallPayment()时，弹出对话框。
public void CallPayment(String a) {
h.post(pay);
}
Handler h = new Handler(){
public void handleMessage (Message msg)
{
switch(msg.what)
{
case HANDLER_TEST:
confirmPay()；
break;
case HANDLER_OVER:
h.removeCallbacks(pay);
break;
}
}
};
Runnable pay =new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
Message msg = new Message();
msg.what = HANDLER_TEST;
h.sendMessage(msg);
}
};
public void confirmPay(){
Dialog dialog=new AlertDialog.Builder(DevilsAtTheGateGameActivity.this)
.setMessage(payStr+"EP? ????????\n??:"+payStr+"?")
.setPositiveButton(R.string.confirm_pay_yes,new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int whichButton) {
//DoSomething
}
})
.setNegativeButton(R.string.confirm_pay_no,new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int whichButton) {
dialog.dismiss();
Message msg = new Message();
msg.what =HANDLER_OVER;
h.sendMessage(msg);
}
}).show();
}
}