How to add Custom Spinner in android - Hello friend inabnomaniiyaha, In the article that you read this time with the title How to add Custom Spinner in android, we have prepared this article well for you to read and take information in it. hopefully the contents of the post Artikel android-example,what we write you can understand. Alright, happy reading.

Judul : How to add Custom Spinner in android
link : How to add Custom Spinner in android

How to add Custom Spinner in android

Spinner is a widget that is used to select an item from a list of items. When the user tap on a spinner a drop-down menu is visible to the user. In this article, we will learn how to add custom spinner in the app

Create a new file algorithm_spinner.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="@+id/image_view"
android:layout_width="100dp"
android:layout_height="100dp"
android:src="@drawable/gfg" />
<TextView
android:id="@+id/text_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/image_view"
android:layout_alignParentTop="true"
android:layout_margin="20dp"
android:layout_toEndOf="@+id/image_view"
android:gravity="center"
android:text="Quick Sort"
android:textColor="@android:color/black"
android:textSize="20sp" />
</RelativeLayout>

Create a new file AlgorithmItem.java

public class AlgorithmItem {
private String algorithmName;

public AlgorithmItem(String countryName)
{
algorithmName = countryName;
}

public String getAlgorithmName()
{
return algorithmName;
}
}

Create a new file AlgorithmAdapter.java

public class AlgorithmAdapter extends ArrayAdapter<AlgorithmItem> {
public AlgorithmAdapter(Context context,
ArrayList<AlgorithmItem> algorithmList)
{
super(context, 0, algorithmList);
}

@NonNull
@Override
public View getView(int position, @Nullable
View convertView, @NonNull ViewGroup parent)
{
return initView(position, convertView, parent);
}

@Override
public View getDropDownView(int position, @Nullable
View convertView, @NonNull ViewGroup parent)
{
return initView(position, convertView, parent);
}

private View initView(int position, View convertView,
ViewGroup parent)
{
// It is used to set our custom view.
if (convertView == null) {
convertView = LayoutInflater.from(getContext()).inflate(R.layout.algorithm_spinner, parent, false);
}

TextView textViewName = convertView.findViewById(R.id.text_view);
AlgorithmItem currentItem = getItem(position);

// It is used the name to the TextView when the
// current item is not null.
if (currentItem != null) {
textViewName.setText(currentItem.getAlgorithmName());
}
return convertView;
}
}

Add the following code in activity_main.xml file. Here we add our spinner on the layout. This will add a textview and a spinner.

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">

<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Learn Algorithms"
android:textStyle="bold"
android:textSize="18sp"
android:layout_above="@+id/spinner_algorithm"
android:layout_marginStart="10dp"
android:layout_marginBottom="25dp"
/>

<Spinner
android:layout_margin="5dp"
android:id="@+id/spinner_algorithm"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:layout_marginTop="18dp" />

</RelativeLayout>

Now add the following code in the MainActivity.java file

public class MainActivity extends AppCompatActivity {

ArrayList<AlgorithmItem> algorithmItems;
AlgorithmAdapter adapter;

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

initList();
Spinner spinner = findViewById(R.id.spinner_algorithm);

// we pass our item list and context to our Adapter.
adapter = new AlgorithmAdapter(this, algorithmItems);
spinner.setAdapter(adapter);

spinner.setOnItemSelectedListener(
new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent,
View view, int position, long id)
{

// It returns the clicked item.
AlgorithmItem clickedItem = (AlgorithmItem)
parent.getItemAtPosition(position);
String name = clickedItem.getAlgorithmName();
Toast.makeText(MainActivity.this, name + " selected", Toast.LENGTH_SHORT).show();
}
@Override
public void onNothingSelected(AdapterView<?> parent)
{
}
});
}

// It is used to set the algorithm names to our array list.
private void initList()
{
algorithmItems = new ArrayList<>();
algorithmItems.add(new AlgorithmItem("Quick Sort"));
algorithmItems.add(new AlgorithmItem("Merge Sort"));
algorithmItems.add(new AlgorithmItem("Heap Sort"));
algorithmItems.add(new AlgorithmItem("Prims Algorithm"));
algorithmItems.add(new AlgorithmItem("Kruskal Algorithm"));
algorithmItems.add(new AlgorithmItem("Rabin Karp"));
algorithmItems.add(new AlgorithmItem("Binary Search"));
}
}

Sreen output:

That's the articleHow to add Custom Spinner in android

That's it for the article How to add Custom Spinner in android this time, hopefully can be useful for all of you. well, see you in another article post.

You are now reading the articleHow to add Custom Spinner in android with link addresshttps://inabnonapudyawanabing.blogspot.com/2020/12/how-to-add-custom-spinner-in-android.html

How to add Custom Spinner in android

How to add Custom Spinner in android