onItemSelected spinner in android

Question

public class MainActivity extends Activity implements
    AdapterView.OnItemSelectedListener {

String animalList[] = {"Lion", "Tiger", "Monkey", "Elephant", "Dog", "Cat", "Camel"};

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

    Spinner spin = (Spinner) findViewById(R.id.animalNamesSpinner);
    spin.setOnItemSelectedListener(this);


    ArrayAdapter aa = new ArrayAdapter(this, android.R.layout.simple_spinner_item, animalList);
    aa.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

    spin.setAdapter(aa);
}


//Performing action onItemSelected and onNothing selected
@Override
public void onItemSelected(AdapterView<?> arg0, View arg1, int position, long id) {

    switch (position){
        case 0:
            Toast.makeText(getApplicationContext(), animalList[position], Toast.LENGTH_LONG).show();
            startActivity(new Intent(this, Lion.class));
            break;

        case 1:
            Toast.makeText(getApplicationContext(), animalList[position], Toast.LENGTH_LONG).show();
            startActivity(new Intent(this, Tiger.class));
            break;

    }
}

@Override
public void onNothingSelected(AdapterView<?> arg0) {
    // TODO Auto-generated method stub

}

I created a spinner. when i run the app its automatically jumps to first activity (Lion.class). what i want is, after Lion be selected on spinner, it goes to that activity. how can I fix it?

i read lots of tutorials but i cant find the answer. i know it must be easy

your spinner always selected first element so that was happen. — Hasmukh Kachhatiya, Apr 05 '17 at 07:51
Cant we change it? I want spinner just be on top of my welcoming screen — Adel Rafiee, Apr 05 '17 at 07:55
Look at [this](http://stackoverflow.com/a/3427058/2467112) answer. It may help you — YMY, Apr 05 '17 at 08:41
Look at [this](http://stackoverflow.com/a/3427058/2467112) answer. It may help you. — YMY, Apr 05 '17 at 08:43

rafsanahmad007 · Answer 1 · 2017-04-05T08:25:11.820

0

Add this in onCreate()..so spinner will not automatically move to new activity in first selection.

spin.setAdapter(aa);
spin.setSelection(0, false); //add this

Now in onItemSelected() add:

 switch (position){
        case 0:
            Toast.makeText(getApplicationContext(), animalList[position], Toast.LENGTH_LONG).show();
            startActivity(new Intent(this, Lion.class));
            break;

        case 1:
            Toast.makeText(getApplicationContext(), animalList[position], Toast.LENGTH_LONG).show();
            startActivity(new Intent(this, Tiger.class));
            spin.setSelection(0, true);  //add this
            break;

edited Apr 05 '17 at 08:25

answered Apr 05 '17 at 07:54

rafsanahmad007

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what is sp2 here? – Adel Rafiee Apr 05 '17 at 08:23
it shows error on this spin.setSelection(0, true); can't resolve spin – Adel Rafiee Apr 05 '17 at 08:35
make your `Spinner spin` global and access it in `onCreate()` like `spin = (Spinner) findViewById(R.id.animalNamesSpinner);` – rafsanahmad007 Apr 05 '17 at 08:38

score 0 · Answer 2 · answered Apr 05 '17 at 08:02

you can add select item as first option as this code

public class MainActivity extends Activity implements
AdapterView.OnItemSelectedListener {

String animalList[] = {"Select Item","Lion", "Tiger", "Monkey", "Elephant", "Dog", "Cat", "Camel"};

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

Spinner spin = (Spinner) findViewById(R.id.animalNamesSpinner);
spin.setOnItemSelectedListener(this);


ArrayAdapter aa = new ArrayAdapter(this, android.R.layout.simple_spinner_item, animalList);
aa.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

spin.setAdapter(aa);
}


//Performing action onItemSelected and onNothing selected
@Override
public void onItemSelected(AdapterView<?> arg0, View arg1, int position, long id) {

switch (position){
    case 1:
        Toast.makeText(getApplicationContext(), animalList[position], Toast.LENGTH_LONG).show();
        startActivity(new Intent(this, Lion.class));
        break;

    case 2:
        Toast.makeText(getApplicationContext(), animalList[position], Toast.LENGTH_LONG).show();
        startActivity(new Intent(this, Tiger.class));
        break;

}
}

@Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub

}

or add boolean flag like this code below

    public class MainActivity extends Activity implements
AdapterView.OnItemSelectedListener {
boolean flag = false;
String animalList[] = {"Lion", "Tiger", "Monkey", "Elephant", "Dog", "Cat", "Camel"};

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

Spinner spin = (Spinner) findViewById(R.id.animalNamesSpinner);
spin.setOnItemSelectedListener(this);


ArrayAdapter aa = new ArrayAdapter(this, android.R.layout.simple_spinner_item, animalList);
aa.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

spin.setAdapter(aa);
}


//Performing action onItemSelected and onNothing selected
@Override
public void onItemSelected(AdapterView<?> arg0, View arg1, int position, long id) {

switch (position){
    case 0:
    if(flag){

        Toast.makeText(getApplicationContext(), animalList[position], Toast.LENGTH_LONG).show();
        startActivity(new Intent(this, Lion.class));
    }
           break;

    case 1:
        Toast.makeText(getApplicationContext(), animalList[position], Toast.LENGTH_LONG).show();
        startActivity(new Intent(this, Tiger.class));
        break;

}
flag = true; 
}

@Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub

}

becase when activity start will set a spinner in the first pstion and triger onItemSelected so using flag you can avoid frist triger

thanks. I guess i didn't say my mean correctly. i have welcoming screen with spinner on top. i want after a client(user) selects an item on spinner then we go to that activity. but right now when we open app, it skips welcoming screen and it goes to the first activity on spinner. i want to solve this. thanks for your help. — Adel Rafiee, Apr 05 '17 at 08:29
I understand you and both codes above are work correctly, try it just replace your code with this snippet it will work — 3zcs, Apr 05 '17 at 08:32
when spinner moves to first, will hit your onItemSelected, so in the first time just skip it, there are many ways to do that. — 3zcs, Apr 05 '17 at 08:35
yeah the codes work properly. but for example by using flag, when we open app, it goes to second activity on spinner — Adel Rafiee, Apr 05 '17 at 13:45
i want non of them be selected until the user choose one of them, and after selection we go from welcoming screen to that activity — Adel Rafiee, Apr 05 '17 at 13:47

onItemSelected spinner in android

2 Answers2