我有我使用Android的展示cardViews的Android AsyncHttpClient的onSuccess()與全球的ArrayList
ArrayList<Transaction> listTransactions;
當內部的onSuccess AsyncHttpClient的,它工作正常使用listTransactions.add全球ArrayList中,但出的onSuccess功能( inside initializeAdapter)listTransactions變爲空
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
getTransactions();
initializeAdapter();
}
private void initializeAdapter(){
Transaction_Adapter adapter = new Transaction_Adapter(listTransactions);
transaction_card.setAdapter(adapter);
LinearLayoutManager llm = new LinearLayoutManager(getContext());
transaction_card.setLayoutManager(llm);
transaction_card.setHasFixedSize(true);
DividerItemDecoration dividerItemDecoration = new DividerItemDecoration(transaction_card.getContext(),1);
transaction_card.addItemDecoration(dividerItemDecoration);
}
public void getTransactions() {
listTransactions=new ArrayList<>();
AsyncHttpClient client = new AsyncHttpClient();
client.get(ip,params ,new AsyncHttpResponseHandler() {
@Override
public void onSuccess(String response) {
try {
JSONObject obj = new JSONObject(response);
if(obj.getBoolean("status")){
int count = obj.getInt("count");
for(int i=0;i<count;i++) {
JSONObject o = obj.getJSONObject("Transaction_" + i);
listTransactions.add(new Transaction(o.getInt("Sender"),o.getInt("Receiver"),o.getDouble("Amount"),o.getString("Date"),o.getString("Type")));
}
//testing
for(Transaction t:listTransactions){
Log.e("transaction",String.valueOf(t.type)); //this shows the type of all transactions correctly
}
}
.
.
.
}
}//catch & onFailure...
});}
沒有例外或錯誤。
而且當我嘗試了initializeAdapter()之前手動添加它,它顯示了手動添加卡罰款
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
getTransactions();
listTransactions.add(new Transaction(1,2,111,"01-12-2016 12:15","test")); //manually added card
initializeAdapter();
}
你定義了'listTransactions = new ArrayList <>();'在'getTransactions'函數中,你如何期望在'initializeAdapter'外面使用它? –
我定義了它全局ArrayList listTransactions; 這是初始化 –
wkh
:D對不起,我的錯誤。我想你應該先設置適配器然後初始化你的數組。這是正確的方法。 –