我正在尝试创建一个任务应用程序，其中我将领域用作本地数据库。我正在Recyclerview中显示此任务。此刻，我可以添加一个带有标题，日期和时间的新任务。但是，当我尝试编辑项目时，RecyClerview不会更新。同样，在删除一项之后，列表显示错误。例如，如果我单击任务1，它在其中显示任务2，何时单击任务2，它显示了其中的任务1。我的addTaskActivity类是
编辑添加任务活动
public class TodoAddActivity extends AppCompatActivity {
// Variables
private Context mContext;
private Realm realm;
private TodoModel task;
private Button button;
private EditText mTaskNameEditText;
private EditText mTaskDateEditText;
private EditText mTaskTimeEditText;
String time;
private RealmResults<TodoModel> results;
public final static String INTENT_KEY_ID = "taskId";
public final static String DATE_FORMAT = "dd/MMM/yy";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView( R.layout.todo_add_layout);
mContext = this;
realm=Realm.getDefaultInstance();
setUpUIViews();
showData();
final String taskId = getIntent().getStringExtra(INTENT_KEY_ID);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (taskId == null)
addTask();
else
editTask(taskId);
}
});
mTaskDateEditText.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
datePicker(view);
}
});
mTaskDateEditText.setOnFocusChangeListener(new View.OnFocusChangeListener() {
@Override
public void onFocusChange(View view, boolean b) {
if (b)
datePicker(view);
}
});
mTaskTimeEditText.setOnClickListener( new View.OnClickListener() {
@Override
public void onClick(View view) {
timePicker( view );
}
} );
mTaskTimeEditText.setOnFocusChangeListener(new View.OnFocusChangeListener() {
@Override
public void onFocusChange(View view, boolean b) {
if (b)
timePicker( view );
}
});
if (taskId != null) {
fillTask(realm.where(TodoModel.class).equalTo("id", taskId).findFirst());
button.setText("EDIT");
}
}
private void setUpUIViews() {
button = (Button) findViewById(R.id.activity_add_task_bt_add);
mTaskNameEditText = (EditText) findViewById(R.id.activity_add_task_et_name);
mTaskDateEditText = (EditText) findViewById(R.id.activity_add_task_et_date);
mTaskTimeEditText = (EditText) findViewById(R.id.activity_add_task_et_time);
}
public void showData(){
results = realm.where(TodoModel.class).findAll();
}
protected TodoModel getTask(int position) {
return results.get(position);
}
private void fillTask(TodoModel task) {
mTaskNameEditText.setText(task.getName());
SimpleDateFormat sdf = new SimpleDateFormat(DATE_FORMAT);
mTaskDateEditText.setText(sdf.format(task.getDate()));
mTaskTimeEditText.setText(task.getTime());
}
private void addTask() {
String taskName = mTaskNameEditText.getText().toString();
String taskDate = mTaskDateEditText.getText().toString();
String taskTime = mTaskTimeEditText.getText().toString();
if (taskName.length() == 0 || taskName.equals("")) {
mTaskNameEditText.setError("Should be filled");
return;
}
if (taskDate.length() == 0 || taskDate.equals("")) {
mTaskDateEditText.setError("Should be filled");
return;
}
TodoModel task = getTask(taskName, taskDate,taskTime);
if (task == null) {
mTaskDateEditText.setError("Not a correct date");
return;
}
task.setDone(false);
addTask(task);
setResult(RESULT_OK);
finish();
}
protected void addTask(TodoModel task) {
realm.beginTransaction();
TodoModel newTask = realm.createObject(TodoModel.class, UUID.randomUUID().toString());
newTask.setName(task.getName());
newTask.setDate(task.getDate());
newTask.setTime(task.getTime());
realm.commitTransaction();
}
private void editTask(String taskId) {
String taskName = mTaskNameEditText.getText().toString();
String taskDate = mTaskDateEditText.getText().toString();
String taskTime = mTaskTimeEditText.getText().toString();
if (taskName.length() == 0 || taskName.equals("")) {
mTaskNameEditText.setError("Should be filled");
return;
}
if (taskDate.length() == 0 || taskDate.equals("")) {
mTaskDateEditText.setError("Should be filled");
return;
}
if (taskTime.length() == 0 || taskTime.equals("")) {
mTaskTimeEditText.setError("Should be filled");
return;
}
TodoModel task = getTask(taskName, taskDate,taskTime);
if (task == null) {
mTaskDateEditText.setError("Not a correct date");
return;
}
task.setId(taskId);
updateTask(task);
setResult(RESULT_OK);
finish();
}
protected void updateTask(TodoModel task) {
realm.beginTransaction();
TodoModel newTask = realm.where(TodoModel.class).equalTo("id", task.getId()).findFirst();
newTask.setDate(task.getDate());
newTask.setDone(task.isDone());
newTask.setName(task.getName());
realm.commitTransaction();
}
private void datePicker(final View view) {
Calendar currentTime = Calendar.getInstance();
int year = currentTime.get(Calendar.YEAR);
int monthOfYear = currentTime.get(Calendar.MONTH);
int dayOfMonth = currentTime.get(Calendar.DAY_OF_MONTH);
DatePickerDialog mDatePickerDialog = new DatePickerDialog(mContext, 0, new DatePickerDialog.OnDateSetListener() {
@Override
public void onDateSet(DatePicker datePicker, int year, int monthOfYear, int dayOfMonth) {
Calendar calendar = Calendar.getInstance();
calendar.set(year, monthOfYear, dayOfMonth);
SimpleDateFormat sdf = new SimpleDateFormat(DATE_FORMAT);
((EditText) view).setText(sdf.format(calendar.getTime()));
}
}, year, monthOfYear, dayOfMonth);
mDatePickerDialog.setTitle("Select Time");
mDatePickerDialog.show();
}
private void timePicker(final View view) {
Calendar mcurrentTime = Calendar.getInstance();
int hour = mcurrentTime.get(Calendar.HOUR_OF_DAY);
int minute = mcurrentTime.get(Calendar.MINUTE);
TimePickerDialog mTimePicker;
mTimePicker = new TimePickerDialog(mContext,0, new TimePickerDialog.OnTimeSetListener() {
@Override
public void onTimeSet(TimePicker timePicker, int selectedHour, int selectedMinute) {
mTaskTimeEditText.setText( selectedHour + ":" + selectedMinute);
}
}, hour, minute, true);//Yes 24 hour time
mTimePicker.setTitle("Select Time");
mTimePicker.show();
}
private TodoModel getTask(String name, String dateString,String time) {
TodoModel task = new TodoModel();
try {
SimpleDateFormat sdf = new SimpleDateFormat(DATE_FORMAT);
task.setName(name);
task.setDate(sdf.parse(dateString));
task.setTime(time );
task.setDone(false);
return task;
} catch (ParseException e) {
e.printStackTrace();
return null;
}
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (item.getItemId() == android.R.id.home)
onBackPressed();
return super.onOptionsItemSelected(item);
}
}
适配器类是
public class TodoAdapter extends RealmRecyclerViewAdapter<TodoModel, TodoAdapter.TaskHolder> {
public final static String INTENT_KEY_ID = "taskId";
//public final static String INTENT_KEY_POSITION = "position";
public final static String DATE_FORMAT = "dd/MMM/yy";
private Realm realm;
public interface TaskListener {
}
private final TaskListener taskListener;
private final Context context;
public TodoAdapter(TaskListener taskListener, RealmResults<TodoModel> realmResults, Context context, Realm realm) {
super(realmResults, true);
this.taskListener = taskListener;
this.context = context;
this.realm = realm;
}
@Override
public TaskHolder onCreateViewHolder(ViewGroup parent, int viewType) {
return new TaskHolder( LayoutInflater.from(parent.getContext()).inflate(R.layout.todo_row, parent, false));
}
@Override
public void onBindViewHolder(TaskHolder holder, final int position) {
final TodoModel task = getData().get(position);
holder.taskTextView.setText(task.getName());
holder.doneCheckBox.setChecked(task.isDone());
holder.timeTextView.setText( task.getTime() );
final SimpleDateFormat sdf = new SimpleDateFormat(DATE_FORMAT);
final Date date = (task.getDate());
if (sdf.format(date).equals(sdf.format(getDate(0))))
holder.dateTextView.setText("Today");
else if (sdf.format(date).equals(sdf.format(getDate(-1))))
holder.dateTextView.setText("Yesterday");
else if (sdf.format(date).equals(sdf.format(getDate(1))))
holder.dateTextView.setText("Tomorrow");
else if (date.getTime() < getDate(6).getTime()) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
holder.dateTextView.setText( DateFormat.format("EEEE", calendar.getTime()).toString());
} else
holder.dateTextView.setText(sdf.format(task.getDate()));
holder.cardView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent = new Intent(context, TodoAddActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.putExtra(INTENT_KEY_ID, getTask(position).getId());
//intent.putExtra(INTENT_KEY_POSITION, position);
context.startActivity(intent);
}
});
holder.doneCheckBox.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
TodoModel task = new TodoModel();
task.setId(getTask(position).getId());
task.setDate(getTask(position).getDate());
task.setName(getTask(position).getName());
task.setDone(((CheckBox) v).isChecked());
updateTask(position, task);
}
});
holder.deleteImageView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (getTask(position).isDone()) {
removeTask(position);
return;
}
AlertDialog.Builder alertDialog = new AlertDialog.Builder(context);
alertDialog.setTitle("Confirm Delete?");
alertDialog.setMessage("Do you want to delete the task you created?");
alertDialog.setPositiveButton("YES", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
removeTask(position);
}
});
alertDialog.setNegativeButton("NO", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
alertDialog.show();
}
});
}
public class TaskHolder extends RecyclerView.ViewHolder {
public CardView cardView;
public TextView taskTextView;
public TextView dateTextView;
public TextView timeTextView;
public ImageView deleteImageView;
public CheckBox doneCheckBox;
public TaskHolder(View itemView) {
super(itemView);
taskTextView = (TextView) itemView.findViewById( R.id.row_task_list_tv_name);
dateTextView = (TextView) itemView.findViewById(R.id.row_task_list_tv_date);
timeTextView=(TextView)itemView.findViewById( R.id.row_task_list_tv_time );
deleteImageView = (ImageView) itemView.findViewById(R.id.row_task_list_iv_delete);
doneCheckBox = (CheckBox) itemView.findViewById(R.id.row_task_list_cb_done);
cardView = (CardView) itemView.findViewById(R.id.cardView);
}
}
private Date getDate(int day) {
Calendar calendar = Calendar.getInstance();
calendar.add(Calendar.DATE, day);
return calendar.getTime();
}
protected TodoModel getTask(int position) {
return getData().get(position);
}
protected void updateTask(int position, TodoModel task) {
realm.beginTransaction();
TodoModel newTask = realm.where(TodoModel.class).equalTo("id", task.getId()).findFirst();
newTask.setDate(task.getDate());
newTask.setDone(task.isDone());
newTask.setName(task.getName());
realm.commitTransaction();
}
protected void removeTask(int position) {
TodoModel newTask = realm.where(TodoModel.class).equalTo("id", getTask(position).getId()).findFirst();
realm.beginTransaction();
newTask.deleteFromRealm();
realm.commitTransaction();
}
}
主要片段
public class ToDoListFragment extends Fragment implements TodoAdapter.TaskListener{
private static final int ADD_TASK_REQUEST_CODE = 1000;
private static final int EDIT_TASK_REQUEST_CODE = 1001;
private Realm realm;
private RecyclerView recyclerView;
private TodoAdapter adapter;
public ToDoListFragment() {
// Required empty public constructor
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
// Inflate the layout for this fragment
View rootView = inflater.inflate(R.layout.fragment_todo_layout, container, false);
// Views
FloatingActionButton addFloatingActionButton = (FloatingActionButton) rootView.findViewById(R.id.activity_tasks_fab_add);
//Listeners
addFloatingActionButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
startActivityForResult(new Intent(getActivity(), TodoAddActivity.class), ADD_TASK_REQUEST_CODE);
}
});
return rootView;
}
@Override
public void onViewCreated(View view,Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
realm = Realm.getDefaultInstance();
recyclerView = (RecyclerView) view.findViewById(R.id.activity_tasks_ll_task);
recyclerView.setHasFixedSize(true);
RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(getActivity());
recyclerView.setLayoutManager(layoutManager);
setAdapter();
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
}
@Override
public void onPrepareOptionsMenu(Menu menu) {
menu.findItem(R.id.blu_home).setVisible(true);
super.onPrepareOptionsMenu(menu);
}
private void setAdapter() {
adapter = new TodoAdapter(this,realm.where(TodoModel.class).findAllSortedAsync("name"),getActivity(), realm);
recyclerView.setAdapter(adapter);
adapter.notifyDataSetChanged();
}
private void setUpRecycler() {
recyclerView.setHasFixedSize(true);
final LinearLayoutManager layoutManager = new LinearLayoutManager(getActivity());
layoutManager.setOrientation(LinearLayoutManager.VERTICAL);
recyclerView.setLayoutManager(layoutManager);
setAdapter();
}
}
image1
image2
logcat
09-06 18:49:36.227 3214-3214/demo.app.com.bluapp_client_and E/AndroidRuntime: FATAL EXCEPTION: main
Process: demo.app.com.bluapp_client_and, PID: 3214
java.lang.ArrayIndexOutOfBoundsException: Out of range in /home/cc/repo/realm/release/realm/realm-library/src/main/cpp/io_realm_internal_Collection.cpp line 152(requested: 1 valid: 1)
at io.realm.internal.Collection.nativeGetRow(Native Method)
at io.realm.internal.Collection.getUncheckedRow(Collection.java:410)
at io.realm.OrderedRealmCollectionImpl.get(OrderedRealmCollectionImpl.java:111)
at io.realm.RealmResults.get(RealmResults.java:60)
at io.realm.OrderedRealmCollectionImpl.get(OrderedRealmCollectionImpl.java:21)
at demo.app.com.bluapp_client_and.adapter.TodoAdapter.getTask(TodoAdapter.java:154)
at demo.app.com.bluapp_client_and.adapter.TodoAdapter$3.onClick(TodoAdapter.java:103)
at android.view.View.performClick(View.java:5610)
at android.view.View$PerformClick.run(View
public class TodoAddActivity extends AppCompatActivity {
// Variables
private Context mContext;
private Realm realm;
private TodoModel task;
private Button button;
private EditText mTaskNameEditText;
private EditText mTaskDateEditText;
private EditText mTaskTimeEditText;
String time;
//private static List<TodoModel> tasks;
private RealmResults<TodoModel> results;
public final static String INTENT_KEY_ID = "taskId";
public final static String DATE_FORMAT = "dd/MMM/yy";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView( R.layout.todo_add_layout);
mContext = this;
realm=Realm.getDefaultInstance();
setUpUIViews();
showData();
final String taskId = getIntent().getStringExtra(INTENT_KEY_ID);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (taskId == null)
addTask();
else
editTask(taskId);
}
});
mTaskDateEditText.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
datePicker(view);
}
});
mTaskDateEditText.setOnFocusChangeListener(new View.OnFocusChangeListener() {
@Override
public void onFocusChange(View view, boolean b) {
if (b)
datePicker(view);
}
});
mTaskTimeEditText.setOnClickListener( new View.OnClickListener() {
@Override
public void onClick(View view) {
timePicker( view );
}
} );
mTaskTimeEditText.setOnFocusChangeListener(new View.OnFocusChangeListener() {
@Override
public void onFocusChange(View view, boolean b) {
if (b)
timePicker( view );
}
});
if (taskId != null) {
fillTask(realm.where(TodoModel.class).equalTo("id", taskId).findFirst());
button.setText("EDIT");
}
}
private void setUpUIViews() {
button = (Button) findViewById(R.id.activity_add_task_bt_add);
mTaskNameEditText = (EditText) findViewById(R.id.activity_add_task_et_name);
mTaskDateEditText = (EditText) findViewById(R.id.activity_add_task_et_date);
mTaskTimeEditText = (EditText) findViewById(R.id.activity_add_task_et_time);
}
public void showData(){
//tasks = new ArrayList<>(); //error
//RealmResults<TodoModel> tasksResult = realm.where(TodoModel.class).findAll();
//for (TodoModel task : tasksResult)
// tasks.add(task); //error*/
results = realm.where(TodoModel.class).findAll();
}
protected TodoModel getTask(int position) {
return results.get(position);
}
private void fillTask(TodoModel task) {
mTaskNameEditText.setText(task.getName());
SimpleDateFormat sdf = new SimpleDateFormat(DATE_FORMAT);
mTaskDateEditText.setText(sdf.format(task.getDate()));
mTaskTimeEditText.setText(task.getTime());
}
private void addTask() {
String taskName = mTaskNameEditText.getText().toString();
String taskDate = mTaskDateEditText.getText().toString();
String taskTime = mTaskTimeEditText.getText().toString();
if (taskName.length() == 0 || taskName.equals("")) {
mTaskNameEditText.setError("Should be filled");
return;
}
if (taskDate.length() == 0 || taskDate.equals("")) {
mTaskDateEditText.setError("Should be filled");
return;
}
TodoModel task = getTask(taskName, taskDate,taskTime);
if (task == null) {
mTaskDateEditText.setError("Not a correct date");
return;
}
task.setDone(false);
addTask(task);
setResult(RESULT_OK);
finish();
}
protected void addTask(TodoModel task) {
realm.beginTransaction();
TodoModel newTask = realm.createObject(TodoModel.class, UUID.randomUUID().toString());
newTask.setName(task.getName());
newTask.setDate(task.getDate());
newTask.setTime(task.getTime());
//realm.copyToRealmOrUpdate(newTask);
realm.commitTransaction();
//realm.close();
}
private void editTask(String taskId) {
String taskName = mTaskNameEditText.getText().toString();
String taskDate = mTaskDateEditText.getText().toString();
String taskTime = mTaskTimeEditText.getText().toString();
if (taskName.length() == 0 || taskName.equals("")) {
mTaskNameEditText.setError("Should be filled");
return;
}
if (taskDate.length() == 0 || taskDate.equals("")) {
mTaskDateEditText.setError("Should be filled");
return;
}
if (taskTime.length() == 0 || taskTime.equals("")) {
mTaskTimeEditText.setError("Should be filled");
return;
}
TodoModel task = getTask(taskName, taskDate,taskTime);
if (task == null) {
mTaskDateEditText.setError("Not a correct date");
return;
}
task.setId(taskId);
updateTask(task);
setResult(RESULT_OK);
finish();
}
protected void updateTask(TodoModel task) {
realm.beginTransaction();
TodoModel newTask = realm.where(TodoModel.class).equalTo("id", task.getId()).findFirst();
newTask.setDate(task.getDate());
newTask.setDone(task.isDone());
newTask.setName(task.getName());
realm.commitTransaction();
}
private void datePicker(final View view) {
Calendar currentTime = Calendar.getInstance();
int year = currentTime.get(Calendar.YEAR);
int monthOfYear = currentTime.get(Calendar.MONTH);
int dayOfMonth = currentTime.get(Calendar.DAY_OF_MONTH);
DatePickerDialog mDatePickerDialog = new DatePickerDialog(mContext, 0, new DatePickerDialog.OnDateSetListener() {
@Override
public void onDateSet(DatePicker datePicker, int year, int monthOfYear, int dayOfMonth) {
Calendar calendar = Calendar.getInstance();
calendar.set(year, monthOfYear, dayOfMonth);
SimpleDateFormat sdf = new SimpleDateFormat(DATE_FORMAT);
((EditText) view).setText(sdf.format(calendar.getTime()));
}
}, year, monthOfYear, dayOfMonth);
mDatePickerDialog.setTitle("Select Time");
mDatePickerDialog.show();
}
private void timePicker(final View view) {
Calendar mcurrentTime = Calendar.getInstance();
int hour = mcurrentTime.get(Calendar.HOUR_OF_DAY);
int minute = mcurrentTime.get(Calendar.MINUTE);
TimePickerDialog mTimePicker;
mTimePicker = new TimePickerDialog(mContext,0, new TimePickerDialog.OnTimeSetListener() {
@Override
public void onTimeSet(TimePicker timePicker, int selectedHour, int selectedMinute) {
mTaskTimeEditText.setText( selectedHour + ":" + selectedMinute);
}
}, hour, minute, true);//Yes 24 hour time
mTimePicker.setTitle("Select Time");
mTimePicker.show();
}
private TodoModel getTask(String name, String dateString,String time) {
TodoModel task = new TodoModel();
try {
SimpleDateFormat sdf = new SimpleDateFormat(DATE_FORMAT);
task.setName(name);
task.setDate(sdf.parse(dateString));
task.setTime(time );
task.setDone(false);
return task;
} catch (ParseException e) {
e.printStackTrace();
return null;
}
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (item.getItemId() == android.R.id.home)
onBackPressed();
return super.onOptionsItemSelected(item);
}
}