I want to add item in a spiiner according to selected item of previous spiiner?how can I? - spinner

Question

I have 2 spinners in my application.one(spinner 1) for selecting qualification and another(spinner2) is to show courses according to selected qualification in spinner 1.
how can I add items in spinner2 on the basis of item selected in spinner 1.

Answer 1

Try This Code:
Java Class
package com.example.spinnerexam;
import java.util.ArrayList;
import java.util.List;
import android.annotation.TargetApi;
import android.app.Activity;
import android.os.Build;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
#TargetApi(Build.VERSION_CODES.HONEYCOMB)
public class SpinnerExample extends Activity implements OnItemSelectedListener{
private Spinner qualificationSpinner, coursesSpinner;
ArrayAdapter<String> courseAdapter;
List<ArrayList<String>> allCoursesList;
CustomOnItemSelectedListener pCustomOnItemSelectedListener;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
qualificationSpinner = (Spinner) findViewById(R.id.spinner1);
coursesSpinner = (Spinner) findViewById(R.id.spinner2);
List<String> qualificationList = new ArrayList<String>();
qualificationList.add("B.tech");
qualificationList.add("M.tech");
qualificationList.add("MCA");
ArrayList<String> cources_Btech = new ArrayList<String>();
cources_Btech.add("Btechcourse1");
cources_Btech.add("Btechcourse2");
cources_Btech.add("Btechcourse3");
ArrayList<String> cources_Mtech = new ArrayList<String>();
cources_Mtech.add("Mtechcourse1");
cources_Mtech.add("Mtechcourse2");
cources_Mtech.add("Mtechcourse3");
ArrayList<String> cources_MCA = new ArrayList<String>();
cources_MCA.add("MCAcourse1");
cources_MCA.add("MCAcourse2");
cources_MCA.add("MCAcourse3");
allCoursesList = new ArrayList<ArrayList<String>>();
allCoursesList.add(cources_Btech);
allCoursesList.add(cources_Mtech);
allCoursesList.add(cources_MCA);
ArrayAdapter<String> qualificationAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, qualificationList);
qualificationAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
qualificationSpinner.setAdapter(qualificationAdapter);
courseAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item);
courseAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
coursesSpinner.setAdapter(courseAdapter);
addListenerOnSpinnerItemSelection();
}
// Add spinner data
public void addListenerOnSpinnerItemSelection(){
qualificationSpinner.setOnItemSelectedListener(this);
coursesSpinner.setOnItemSelectedListener(this);
}
#Override
public void onItemSelected(AdapterView<?> parent, View view, int pos, long id) {
courseAdapter.clear();
courseAdapter.addAll(allCoursesList.get(pos));
courseAdapter.notifyDataSetChanged();
}
#Override
public void onNothingSelected(AdapterView<?> arg0) {
}
}
XML layout
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<Spinner
android:id="#+id/spinner1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:prompt="#string/spinner_prompt" />
<Spinner
android:id="#+id/spinner2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:prompt="#string/spinner_prompt" />
</LinearLayout>