我有一些按鈕和數(shù)組列表，我的按鈕有條件if(list.isEmpty){ button.setEnabled(false) } 并將textTotalFinalPrice值設(shè)置為0但就我而言，該功能實(shí)際上可以工作，但必須單擊兩次才能設(shè)置值textTotalFinalPrice并禁用button。如果只點(diǎn)擊 1 次ArrayList不清除數(shù)據(jù)我已經(jīng)嘗試過了list.clear();還是不行代碼 ： public void calculateTotalPrice(){ activity.header.grandTotalPrice(); activity.textTotalFinalPrice.setText(NumberFormat.getCurrencyInstance(new Locale("id", "id")).format(activity.header.getFinalTotal())); } private void conditionCartsSize() { if (activity.header.getCarts().isEmpty()){ activity.textFinishOrder.setEnabled(false); }else{ activity.textFinishOrder.setEnabled(true); activity.textFinishOrder.setOnClickListener(view -> { PrintHelper.bluetoothPrint(activity, activity.header); calculateTotalPrice(); AlertDialog dialog = new AlertDialog.Builder(activity) .setTitle("Pesanan Berhasil") .setMessage("Silahkan Ambil Struk Anda") .create(); dialog.show(); activity.header.getCarts().removeAll(activity.header.getCarts()); notifyDataSetChanged(); }); } }我會很感激你的回答
3 回答
jeck貓
TA貢獻(xiàn)1909條經(jīng)驗(yàn) 獲得超7個贊
檢查sizeifgetCarts()條件如下
private void conditionCartsSize() {
if (activity.header.getCarts().size>0){
activity.textFinishOrder.setEnabled(false);
}else{
activity.textFinishOrder.setEnabled(true);
activity.textFinishOrder.setOnClickListener(view -> {
PrintHelper.bluetoothPrint(activity, activity.header);
calculateTotalPrice();
AlertDialog dialog = new AlertDialog.Builder(activity)
.setTitle("Pesanan Berhasil")
.setMessage("Silahkan Ambil Struk Anda")
.create();
dialog.show();
activity.header.getCarts().removeAll(activity.header.getCarts());
notifyDataSetChanged();
});
}
}
12345678_0001
TA貢獻(xiàn)1802條經(jīng)驗(yàn) 獲得超5個贊
固定的
只需像這樣進(jìn)行一些自定義初始化新的 ArrayList 即可： activity.header = new Header(0,0,0,0,0,0,new ArrayList());
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