/
MainActivity.java
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/
MainActivity.java
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package com.jorgeamvf.roommarkdownnotepad;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.widget.TextView;
import com.jorgeamvf.roommarkdownnotepad.adapter.NotesAdapter;
import com.jorgeamvf.roommarkdownnotepad.notedb.NoteDatabase;
import com.jorgeamvf.roommarkdownnotepad.notedb.model.Note;
import java.lang.ref.WeakReference;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity implements NotesAdapter.OnNoteItemClick {
RecyclerView recyclerView;
private TextView textViewMsg;
private NoteDatabase noteDatabase;
private List<Note> notes;
private NotesAdapter notesAdapter;
private int pos;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initializeViews();
displayList();
}
private void displayList() {
noteDatabase = NoteDatabase.getInstance(MainActivity.this);
new RetrieveTask(this).execute();
}
private static class RetrieveTask extends AsyncTask<Void, Void, List<Note>> {
private WeakReference<MainActivity> activityReference;
RetrieveTask(MainActivity context) {
activityReference = new WeakReference<>(context);
}
@Override
protected List<Note> doInBackground(Void... voids) {
if (activityReference.get() != null)
return activityReference.get().noteDatabase.getNoteDao().getNotes();
else
return null;
}
@Override
protected void onPostExecute(List<Note> notes) {
if (notes != null && notes.size() > 0) {
activityReference.get().notes.clear();
activityReference.get().notes.addAll(notes);
activityReference.get().textViewMsg.setVisibility(View.GONE);
activityReference.get().notesAdapter.notifyDataSetChanged();
}
}
}
private void initializeViews() {
Toolbar toolbar = findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
textViewMsg = findViewById(R.id.textview_empty);
FloatingActionButton fab = findViewById(R.id.fab);
fab.setOnClickListener(listener);
recyclerView = findViewById(R.id.recycler_view);
recyclerView.setLayoutManager(new LinearLayoutManager(MainActivity.this));
notes = new ArrayList<>();
notesAdapter = new NotesAdapter(notes, MainActivity.this);
recyclerView.setAdapter(notesAdapter);
}
private View.OnClickListener listener = new View.OnClickListener() {
@Override
public void onClick(View view) {
startActivityForResult(new Intent(MainActivity.this, AddNoteActivity.class), 100);
}
};
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == 100 && resultCode > 0) {
if (resultCode == 1) {
notes.add((Note) data.getSerializableExtra("note"));
} else if (resultCode == 2) {
notes.set(pos, (Note) data.getSerializableExtra("note"));
}
listVisibility();
}
}
@Override
public void onNoteClick(final int pos) {
new AlertDialog.Builder(MainActivity.this)
.setTitle("Select:")
.setItems(new String[]{"Read", "Update", "Delete"}, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
switch (i) {
case 0:
MainActivity.this.pos = pos;
startActivityForResult(
new Intent(MainActivity.this,
ViewNoteActivity.class).putExtra(
"note", notes.get(pos)), 100);
break;
case 1:
MainActivity.this.pos = pos;
startActivityForResult(
new Intent(MainActivity.this,
AddNoteActivity.class).putExtra(
"note", notes.get(pos)), 100);
break;
case 2:
noteDatabase.getNoteDao().deleteNote(notes.get(pos));
notes.remove(pos);
listVisibility();
break;
}
}
}).show();
}
private void listVisibility() {
int emptyMsgVisibility = View.GONE;
if (notes.size() == 0) {
if (textViewMsg.getVisibility() == View.GONE)
emptyMsgVisibility = View.VISIBLE;
}
textViewMsg.setVisibility(emptyMsgVisibility);
notesAdapter.notifyDataSetChanged();
}
@Override
protected void onDestroy() {
noteDatabase.cleanUp();
super.onDestroy();
}
}