Almost done! We need to make sure the user can click and edit a message. To do this we'll open the NoteActivity and pass in a parameter so we know we're editing.
First, let's add a click listener to our ListView items, this is a little different than before, but almost the same.
In your MainActivity's onCreate after you define your noteList ListView, put the following.
noteList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
//TODO open the new dialog.
}
});
Now let's use an Intent and pass in some data to open the NoteActivity. Replace the TODO statement with the following lines.
Intent openNote = new Intent(MainActivity.this, NoteActivity.class);
openNote.putExtra("noteId", id);
startActivity(openNote);
This will open the NoteActivity when you click on any item, but we need to handle it on the other side. Let's now open up our NoteActivity activity and check to see if there exists a noteId. If there is, then we know we're supposed to be editing it.
We'll put this snippit in our onCreate after setting the database (db = handler.getWritableDatabase();) and after setting your layout elements (findViewById lines).
Bundle extras = getIntent().getExtras();
if (extras != null) {
isUpdate = true;
noteId = (int) extras.getLong("noteId");
setNote(noteId);
}
The snippit will get the Intent extras we sent along with the request. If there are extras, we get the noteId and set it to a variable, then we pass it into the function setNote that sets all the values of our layout with the stored note's information.
Finally, one more thing we need to do. Previously we just had a single line when you clicked "Create Note", now we'll add some logic to either Create or Update a note. You can replace the line storeNote("", noteTitle.getText().toString(), ""); with the following.
if (!isUpdate) {
storeNote(imagePath, noteTitle.getText().toString(), "Description", "Category");
} else {
updateNote(noteId, imagePath, noteTitle.getText().toString(), "Description", "Category");
}
finish();
That will either update or store the note, and then close that Activity and return you to the MainActivity.