我正在開發一個Android應用程序,並且我已經使用Firebase實施了身份驗證。登錄後,在我的NavigationDrawerActivity
我有一個ListView
,我已經設置了一個FirebaseListAdapater
以獲取用戶特定的數據。如何刪除ListView中與FirebaseListAdapter一起使用的當前選定項目?
在我onCreate()
方法我有以下幾點:
firebaseAuth = FirebaseAuth.getInstance();
FirebaseUser localUser = firebaseAuth.getCurrentUser();
String localUserEmail = localUser.getEmail();
String localUserEmailUniqueID = getEmailAddressUniqueID(localUserEmail);
String dbUsersRoot = "https://DATABASENAME.firebaseio.com/Users/";
String dbUniqueRefForCurrentUser = dbUsersRoot + localUserEmailUniqueID +"/parishioners";
DatabaseReference databaseReferenceCurrentUser = FirebaseDatabase.getInstance().getReferenceFromUrl(dbUniqueRefForCurrentUser);
final FirebaseListAdapter<String> firebaseListAdapter = new FirebaseListAdapter<String>(
this,
String.class,
android.R.layout.simple_list_item_2,
databaseReferenceCurrentUser
) {
@Override
protected void populateView(View v, String model, int position) {
TextView textView = (TextView) v.findViewById(android.R.id.text1);
textView.setText(model);
}
};
mListView.setAdapter(firebaseListAdapter);
現在,在我的onStart()
方法我增加了一個setOnClickListener
到希望新的項目加入到我的列表中,這樣的按鈕:
@Override
protected void onStart(){
super.onStart();
mButtonAdd.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
firebaseAuth = FirebaseAuth.getInstance();
FirebaseUser localUser = firebaseAuth.getCurrentUser();
String localUserEmail = localUser.getEmail();
String localUserEmailUniqueID = getEmailAddressUniqueID(localUserEmail);
String dbUsersRoot = "https://DATABASENAME.firebaseio.com/Users/";
String dbUniqueRefForCurrentUser = dbUsersRoot + localUserEmailUniqueID +"/parishioners";
DatabaseReference databaseReferenceCurrentUser = FirebaseDatabase.getInstance().getReferenceFromUrl(dbUniqueRefForCurrentUser);
databaseReferenceCurrentUser.push().setValue(editTextNewMember.getText().toString().trim());
}
});
}
在單擊Add按鈕,我會在我的數據庫是這樣的(假設的EditText
在它的字符串「卡布奇諾」):
"luminittta" : {
"parishioners" : {
"-KX1GcEWPMy7oFWgt_3h" : "capuccino"
現在,我的列表將顯示'capuccino'(因爲它是一個實時數據庫,我的列表將自動更新新增值)。
我的問題是: 我該如何實現下一個刪除功能,當用戶長時間點擊ListView
中的項目時,它會被刪除?
整個數據庫是這樣的:
{
"Users" : {
"davidivanmircea" : {
"parishioners" : {
"-KX1FNcgSXgsMNz6QRIS" : "Gus Crick",
"-KX1FVIzzPM4nMrMvm9x" : "Florentino Williams",
"-KX1FZ27M-KS5TQZQ76u" : "Marc Raff",
"-KX1FbercKpPrl9r9tb4" : "Frederick Haddon",
"-KX1FgguOlRRN4sZKS8Z" : "Cristobal Wolfe",
"-KX1FkgwifQLIHplsZNx" : "Scott Nodal",
"-KX1Fp64Sa2QD94GR9uK" : "Odis Nevers",
"-KX1FrYK5PeuBucEiamY" : "Chauncey Mossman",
"-KX1FvIBDSrvppC3e4Ip" : "Alfonso Ignacio",
"-KX1Fy7dEHH8Z9JV-BRL" : "Douglas Hettinger",
"-KX1WdtbV4PEiscJV6E_" : "Daniel Muresan",
"-KX1WvYqekJZdWS6wGh6" : "Angelina Jolie"
}
},
"luminittta" : {
"parishioners" : {
"-KX1GYuSsgmHyGk5LQLA" : "mocha",
"-KX1G_Q130sWitNGzlAR" : "triplo",
"-KX1GaPIhuIyhV4vmLGe" : "latte",
"-KX1GcEWPMy7oFWgt_3h" : "capuccino",
"-KX1Gf7TKY3N8IQETig-" : "machiatto",
"-KX1Gh4KoYpcVpCDFI2x" : "cafe melange",
"-KX1GoCutX3XO-CRWWB3" : "ristretto",
"-KX1GpvdE5i9UR2ZaX0K" : "americano",
"-KX1Grb8S5QZu4HT9cuW" : "espresso"
}
}
}
}
非常感謝您的幫助!
PS:我修改了我的實際數據庫名稱,並在代碼中使用'DATABASENAME'。
查看http://stackoverflow.com/questions/34110497/how-to-implement-a-setonitemclicklistener-firebaserecyclerviewadapter/34113070#34113070 –
@FrankvanPuffelen謝謝你的快速回答,弗蘭克!我按照你的建議編輯了這個問題。我會查看您提供的鏈接,並在找到解決方案後再回來。 – SimpleFuzz
感謝您的更新。好多了。清理評論。 –