// On open application create listview, load movie data from file and
// show it.
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Loading movie list from the file, if failed - reset the array list.
if (FileManager.loadFile(this, FILE_NAME, mMovies) == FileManager.RESULT_ERROR) {
mMovies = new ArrayList<>();
}
mListViewMovies = (ListView) findViewById(R.id.listViewMainMovies);
mEmptyMainMovieList = (TextView) findViewById(R.id.emptyMainMovieList);
mTextViewMainTopic = (TextView) findViewById(R.id.textViewMainTopic);
// ListView adapter initialising.
mMainListAdapter = new MainListAdapter(this, mMovies);
mListViewMovies.setAdapter(mMainListAdapter);
// On Item click transferring to Editor Screen.
mListViewMovies.setOnItemClickListener(
new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
transferToEditorActivity(position);
}
});
// On Item Long click, open menu for edit and delete options.
mListViewMovies.setOnItemLongClickListener(
new AdapterView.OnItemLongClickListener() {
@Override
public boolean onItemLongClick(
AdapterView<?> parent, View view, final int position, long id) {
PopupMenu popupMenu = new PopupMenu(MainActivity.this, view);
popupMenu.setOnMenuItemClickListener(
new PopupMenu.OnMenuItemClickListener() {
@Override
public boolean onMenuItemClick(MenuItem item) {
switch (item.getItemId()) {
// Delete the movie from list and file.
case R.id.action_delete:
// Open confirmation dialog.
new AlertDialog.Builder(MainActivity.this)
.setTitle(R.string.dialog_delete_movie_title)
.setMessage(R.string.dialog_delete_all_message)
.setPositiveButton(
R.string.dialog_delete_movie_positive_button_label,
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
mMovies.remove(position);
FileManager.saveFile(MainActivity.this, FILE_NAME, mMovies);
mMainListAdapter.notifyDataSetChanged();
}
})
.setNegativeButton(R.string.button_cancel_label, null)
.create()
.show();
break;
// Go to Editor activity.
case R.id.action_edit:
transferToEditorActivity(position);
break;
}
return true;
}
});
popupMenu.inflate(R.menu.menu_item);
popupMenu.show();
return true;
}
});
mListViewMovies.setEmptyView(mEmptyMainMovieList);
}
