/
MainActivity.java
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/
MainActivity.java
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package ercanduman.notetakingapp.activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Toast;
import com.google.android.material.floatingactionbutton.FloatingActionButton;
import com.google.android.material.snackbar.Snackbar;
import java.util.List;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;
import androidx.lifecycle.Observer;
import androidx.lifecycle.ViewModelProviders;
import androidx.recyclerview.widget.ItemTouchHelper;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import ercanduman.notetakingapp.Configuration;
import ercanduman.notetakingapp.R;
import ercanduman.notetakingapp.adapter.NotesAdapter;
import ercanduman.notetakingapp.database.model.Note;
import ercanduman.notetakingapp.viewmodel.NoteViewModel;
import static ercanduman.notetakingapp.Configuration.EXTRA_NOTE;
import static ercanduman.notetakingapp.Configuration.REQUEST_CODE_ADD_NOTE;
import static ercanduman.notetakingapp.Configuration.REQUEST_CODE_EDIT_NOTE;
import static ercanduman.notetakingapp.Configuration.isDebugMode;
public class MainActivity extends AppCompatActivity {
private static final String TAG = Configuration.TAG;
private NoteViewModel viewModel;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
RecyclerView recyclerView = findViewById(R.id.recycler_view);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
recyclerView.setHasFixedSize(true); // adds perfomance to recyclerview
final NotesAdapter adapter = new NotesAdapter();
recyclerView.setAdapter(adapter);
// If you pass this keyword, then the ViewModel will be destroyed after activity destroys.
viewModel = ViewModelProviders.of(this).get(NoteViewModel.class);
viewModel.getAllNotes().observe(this, new Observer<List<Note>>() {
@Override
public void onChanged(List<Note> notes) {
// onChanged method triggered every time LiveData changes. so do not need to call notifyDataSetChanged methods.
adapter.submitList(notes);
}
});
FloatingActionButton fab = findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent = new Intent(MainActivity.this, AddNoteActivity.class);
startActivityForResult(intent, REQUEST_CODE_ADD_NOTE);
}
});
new ItemTouchHelper(new ItemTouchHelper.SimpleCallback(0, ItemTouchHelper.LEFT) { //You can add multiple swipe direction such as ItemTouchHelper.LEFT | ItemTouchHelper.RIGHT
@Override
public boolean onMove(@NonNull RecyclerView recyclerView, @NonNull RecyclerView.ViewHolder viewHolder, @NonNull RecyclerView.ViewHolder target) {
return false;
}
@Override
public void onSwiped(@NonNull RecyclerView.ViewHolder viewHolder, int direction) {
int itemPosition = viewHolder.getAdapterPosition();
final Note deleteNote = adapter.getNoteAtPosition(itemPosition);
// Since MainActivity observes LiveData, any changes in the Note table or in ViewModel reflects in RecyclerView immediately
// Which means we don't need to reload table data to recyclerView or notifyDataSetChanged callbacks
viewModel.delete(deleteNote);
Snackbar.make(viewHolder.itemView, "Note deleted", Snackbar.LENGTH_LONG)
.setAction("Undo", new View.OnClickListener() {
@Override
public void onClick(View view) {
viewModel.insert(deleteNote);
if (isDebugMode) Log.d(TAG, "Snackbar.onClick: Undo clicked!");
}
}).show();
}
}).attachToRecyclerView(recyclerView);
adapter.setClickListener(new NotesAdapter.OnItemClickListener() {
@Override
public void onItemClick(Note note) {
Toast.makeText(MainActivity.this, note.getTitle() + " clicked!", Toast.LENGTH_SHORT).show();
Intent intent = new Intent(MainActivity.this, AddNoteActivity.class);
intent.putExtra(EXTRA_NOTE, note);
startActivityForResult(intent, REQUEST_CODE_EDIT_NOTE);
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_delete_all_notes) {
viewModel.deleteAllNotes();
Toast.makeText(this, "All Notes deleted.", Toast.LENGTH_SHORT).show();
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == REQUEST_CODE_ADD_NOTE && resultCode == RESULT_OK) {
if (data != null) {
Note note = data.getParcelableExtra(EXTRA_NOTE);
if (note != null) {
// Since MainActivity observes LiveData, any changes in the Note table reflected in RecyclerView immediately
// Which means we don't need to reload table data to recyclerView or notifyDataSetChanged callbacks
viewModel.insert(note);
Toast.makeText(this, "Note saved successfully!", Toast.LENGTH_SHORT).show();
if (isDebugMode) {
Log.d(TAG, "MainActivity.onActivityResult: Note saved");
Log.d(TAG, "MainActivity.onActivityResult: Note info: " + note.toString());
}
}
} else {
if (isDebugMode) Log.d(TAG, "MainActivity.onActivityResult: data is null!");
Toast.makeText(this, "Cannot save, an error occurred...", Toast.LENGTH_SHORT).show();
}
} else if (requestCode == REQUEST_CODE_EDIT_NOTE && resultCode == RESULT_OK) {
if (data != null) {
Note note = data.getParcelableExtra(EXTRA_NOTE);
if (note != null) {
viewModel.update(note);
Toast.makeText(this, "Note updated successfully!", Toast.LENGTH_SHORT).show();
if (isDebugMode) {
Log.d(TAG, "MainActivity.onActivityResult: Note updated");
Log.d(TAG, "MainActivity.onActivityResult: Note info: " + note.toString());
}
}
} else {
if (isDebugMode) Log.d(TAG, "MainActivity.onActivityResult: data is null!");
Toast.makeText(this, "Cannot update, an error occurred...", Toast.LENGTH_SHORT).show();
}
} else Toast.makeText(this, "Canceled...", Toast.LENGTH_SHORT).show();
}
}