You can disable your EditText fields using the following instructions:
https://stackoverflow.com/a/33582335/3268303
Applications will normally share add/edit screens, but not necessarily view/edit.
An example of add/edit sharing is here:
https://github.com/googlesamples/android-architecture/tree/todo-mvp/todoapp/app/src/main/java/com/example/android/architecture/blueprints/todoapp/addedittask
public class AddEditTaskPresenter implements AddEditTaskContract.Presenter,
TasksDataSource.GetTaskCallback {
@NonNull
private final TasksDataSource mTasksRepository;
@NonNull
private final AddEditTaskContract.View mAddTaskView;
@Nullable
private String mTaskId;
private boolean mIsDataMissing;
/**
* Creates a presenter for the add/edit view.
*
* @param taskId ID of the task to edit or null for a new task
* @param tasksRepository a repository of data for tasks
* @param addTaskView the add/edit view
* @param shouldLoadDataFromRepo whether data needs to be loaded or not (for config changes)
*/
public AddEditTaskPresenter(@Nullable String taskId, @NonNull TasksDataSource tasksRepository,
@NonNull AddEditTaskContract.View addTaskView, boolean shouldLoadDataFromRepo) {
mTaskId = taskId;
mTasksRepository = checkNotNull(tasksRepository);
mAddTaskView = checkNotNull(addTaskView);
mIsDataMissing = shouldLoadDataFromRepo;
mAddTaskView.setPresenter(this);
}
@Override
public void start() {
if (!isNewTask() && mIsDataMissing) {
populateTask();
}
}
@Override
public void saveTask(String title, String description) {
if (isNewTask()) {
createTask(title, description);
} else {
updateTask(title, description);
}
}
@Override
public void populateTask() {
if (isNewTask()) {
throw new RuntimeException("populateTask() was called but task is new.");
}
mTasksRepository.getTask(mTaskId, this);
}
@Override
public void onTaskLoaded(Task task) {
// The view may not be able to handle UI updates anymore
if (mAddTaskView.isActive()) {
mAddTaskView.setTitle(task.getTitle());
mAddTaskView.setDescription(task.getDescription());
}
mIsDataMissing = false;
}
@Override
public void onDataNotAvailable() {
// The view may not be able to handle UI updates anymore
if (mAddTaskView.isActive()) {
mAddTaskView.showEmptyTaskError();
}
}
@Override
public boolean isDataMissing() {
return mIsDataMissing;
}
private boolean isNewTask() {
return mTaskId == null;
}
private void createTask(String title, String description) {
Task newTask = new Task(title, description);
if (newTask.isEmpty()) {
mAddTaskView.showEmptyTaskError();
} else {
mTasksRepository.saveTask(newTask);
mAddTaskView.showTasksList();
}
}
private void updateTask(String title, String description) {
if (isNewTask()) {
throw new RuntimeException("updateTask() was called but task is new.");
}
mTasksRepository.saveTask(new Task(title, description, mTaskId));
mAddTaskView.showTasksList(); // After an edit, go back to the list.
}
}
