Example to implement custom Spinner with OnItemSelectedListener.
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| Custom Spinner with OnItemSelectedListener |
package com.example.androidcustomspinner;
import java.util.ArrayList;
import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.BaseAdapter;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity {
private class MyObject {
private int number;
private String name;
MyObject(int num, String nam) {
number = num;
name = nam;
}
public int getNumber() {
return number;
}
public String getName() {
return name;
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Spinner spinner = (Spinner) findViewById(R.id.spinner);
// Init ArrayList of MyObject
ArrayList<MyObject> myArrayList = new ArrayList<MyObject>();
myArrayList.add(new MyObject(0, "Sunday"));
myArrayList.add(new MyObject(1, "Monday"));
myArrayList.add(new MyObject(2, "Tuesday"));
myArrayList.add(new MyObject(3, "Wednesday"));
myArrayList.add(new MyObject(4, "Thursday"));
myArrayList.add(new MyObject(5, "Friday"));
myArrayList.add(new MyObject(6, "Saturday"));
MyAdapter myAdapter = new MyAdapter(this, myArrayList);
spinner.setAdapter(myAdapter);
spinner.setOnItemSelectedListener(new OnItemSelectedListener(){
@Override
public void onItemSelected(AdapterView<?> parent, View view,
int position, long id) {
MyObject clickedObj = (MyObject)parent.getItemAtPosition(position);
Toast.makeText(MainActivity.this,
"Clicked item:\n" +
clickedObj.getNumber() + ": " +
clickedObj.getName(),
Toast.LENGTH_LONG).show();
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}});
}
private class MyAdapter extends BaseAdapter {
private ArrayList<MyObject> myList;
private Activity parentActivity;
private LayoutInflater inflater;
public MyAdapter(Activity parent, ArrayList<MyObject> l) {
parentActivity = parent;
myList = l;
inflater = (LayoutInflater) parentActivity
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public int getCount() {
return myList.size();
}
@Override
public Object getItem(int position) {
return myList.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View view = convertView;
if (convertView == null)
view = inflater.inflate(R.layout.row, null);
TextView text1 = (TextView) view.findViewById(R.id.text1);
TextView text2 = (TextView) view.findViewById(R.id.text2);
MyObject myObj = myList.get(position);
text1.setText(String.valueOf(myObj.getNumber()));
text2.setText(myObj.getName());
return view;
}
}
}
row.xml, define the layout of individual row in the custom Spinner.
<LinearLayout 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"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:orientation="vertical"
tools:context=".MainActivity" >
<TextView
android:id="@+id/text1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<TextView
android:id="@+id/text2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textStyle="bold"/>
</LinearLayout>
Main layout
<LinearLayout 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"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:orientation="vertical"
tools:context=".MainActivity" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="android-coding.blogspot.com" />
<Spinner
android:id="@+id/spinner"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
Also read:
Implement auto scroll marquee TextView in Spinner
