Problem with the ListView not displaying items, while everything seems alright-CodePudding

I am basically getting depression getting to fix this, because everything seems alright to me. So basically I am making an ArrayAdapter to make my ListView display items from another layout that I created. And everyting is working alright, but for some reason it is not displaying items. Please help. Here is my MainActivity class:

public class MainActivity extends AppCompatActivity {

private static final String TAG = "MainActivity";
public SQLiteDatabase database;


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);

    ListView listView = (ListView) findViewById(R.id.connectionsList);

    Intent intent = new Intent(this, CreateActivity.class);

    database = getBaseContext().openOrCreateDatabase("database.db", MODE_PRIVATE, null);

    database.execSQL("CREATE TABLE IF NOT EXISTS connections(name TEXT, hostname TEXT, username TEXT, password TEXT, domain TEXT, localdir TEXT, remotedir TEXT, retry INTEGER, timeout INTEGER, port INTEGER);");
    Log.d(TAG, "onCreate: SQL WORKED");

    View.OnClickListener fabListener = new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            startActivity(intent);
        }
    };

    fab.setOnClickListener(fabListener);

    ConnectionsAdapter adapter = new ConnectionsAdapter(this, R.layout.list_connections, getConnections());

    listView.setAdapter(adapter);
}

private List<Connections> getConnections() {
    List<Connections> connections = new ArrayList<>();

    Cursor query = database.rawQuery("SELECT * FROM connections;", null);

    if(query.moveToFirst()) {

    }

    return connections;
}

Here is my ConnectionsAdapter class:

public class ConnectionsAdapter extends ArrayAdapter<Connections> {

private int resourceLayout;
private Context mContext;
private List<Connections> connectionsList;

public ConnectionsAdapter(@NonNull Context context, int resource, @NonNull List<Connections> objects) {
    super(context, resource, objects);
    this.resourceLayout = resource;
    this.mContext = context;
    this.connectionsList = objects;
}

public View getView(int position, View convertView, ViewGroup parent) {

    View view = convertView;

    View.OnClickListener buttonListener = new View.OnClickListener() {
        @Override
        public void onClick(View view) {

        }
    };

    if(view == null) {
        LayoutInflater inflater;
        inflater = LayoutInflater.from(mContext);
        view = inflater.inflate(resourceLayout, null);
    }

    if(view != null) {
        TextView status = (TextView) view.findViewById(R.id.status);
        TextView name = (TextView) view.findViewById(R.id.name);
        TextView size = (TextView) view.findViewById(R.id.size);
        ImageView imageView = (ImageView) view.findViewById(R.id.imageView);
        Button button = (Button) view.findViewById(R.id.details);

        status.setText(Color.GREEN   "ONLINE");
        name.setText("FIRST ONE");
        imageView.setImageDrawable(view.getResources().getDrawable(R.drawable.hard_drive_icon));
        size.setText("232/465 GB");

        button.setOnClickListener(buttonListener);
    }

    return view;
}

@Override
public int getCount() {
    return super.getCount();
}

@Nullable
@Override
public Connections getItem(int position) {
    return super.getItem(position);
}

}

And here is my MainActivity.xml:

<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/black">

<ListView
    android:id="@ id/connectionsList"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#000000"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent" />

<com.google.android.material.floatingactionbutton.FloatingActionButton
    android:id="@ id/fab"
    android:layout_width="wrap_content"

    android:layout_height="wrap_content"
    android:contentDescription="@string/click_this_to_add_new_connection"
    android:src="@drawable/fab_icon"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.954"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintVertical_bias="0.976"
    tools:ignore="SpeakableTextPresentCheck,RedundantDescriptionCheck" /></androidx.constraintlayout.widget.ConstraintLayout>

Here is my list_connections.xml(The layout used for listview adapter):

<androidx.appcompat.widget.LinearLayoutCompat xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#000000">

<TextView
    android:id="@ id/status"
    android:layout_width="60dp"
    android:layout_height="100dp"
    android:gravity="center_horizontal|center_vertical"
    android:textColor="#FFFFFF"
    android:textStyle="bold"
    tools:text="Offline" />

<ImageView
    android:id="@ id/imageView"
    android:layout_width="80dp"
    android:layout_height="100dp"
    android:contentDescription="@string/just_an_icon_for_decoration"
    app:srcCompat="@drawable/hard_drive_icon" />

<TextView
    android:id="@ id/name"
    android:layout_width="90dp"
    android:layout_height="wrap_content"
    android:textAlignment="center"
    android:textColor="#FFFFFF"
    android:textStyle="bold"
    tools:text="Name" />

<TextView
    android:id="@ id/size"
    android:layout_width="90dp"
    android:layout_height="wrap_content"
    android:textAlignment="center"
    android:textColor="#FFFFFF"
    android:textStyle="bold"
    tools:text="SIZE" />

<Button
    android:id="@ id/details"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/details" /></androidx.appcompat.widget.LinearLayoutCompat>

CodePudding user response：

The problem is with your getCount() method. Since your connectionsList is empty it returns 0. If you want to test with hardcoded data you can change it like below.

@Override
public int getCount() {
    return 1; // or 2,5,10 any number of items you want
}