Android: Create spinner programmatically from arra

问题:

I\'m all new to Android and I\'m trying to create a spinner programmatically and feeding it with data from an array, but Eclipse gives me a warning that I can\'t handle.

Here\'s what I got:

This ArrayList holds the elements that should be in the spinner (gets filled from a file later on):

ArrayList<String> spinnerArray = new ArrayList<String>();

This is code I found on a site which should create the spinner:

Spinner spinner = new Spinner(this);
ArrayAdapter spinnerArrayAdapter = new ArrayAdapter(this,
                android.R.layout.simple_spinner_dropdown_item,
                spinnerArray);
spinner.setAdapter(spinnerArrayAdapter);

Now the second line (ArrayAdapter...) gives me a warning in Eclipse saying \"ArrayAdapter is a raw type... References to generic type ArrayAdapter<T> should be parameterized\", I have no idea how to fix this (or what that means in the first place :) ).

It\'s just a warning and the App seems to run alright, but I\'d still like to understand what\'s wrong and fix it. Any hint is appreciated.

Greetings, Select0r

回答1:

ArrayAdapter<String> should work.

i.e.:

Spinner spinner = new Spinner(this);
ArrayAdapter<String> spinnerArrayAdapter = new ArrayAdapter<String>
            (this, android.R.layout.simple_spinner_item,
           spinnerArray); //selected item will look like a spinner set from XML
spinnerArrayAdapter.setDropDownViewResource(android.R.layout
                                                     .simple_spinner_dropdown_item);
spinner.setAdapter(spinnerArrayAdapter); 

回答2:

In the same way with Array

// Array of choices
String colors[] = {\"Red\",\"Blue\",\"White\",\"Yellow\",\"Black\", \"Green\",\"Purple\",\"Orange\",\"Grey\"};

// Selection of the spinner
Spinner spinner = (Spinner) findViewById(R.id.myspinner);

// Application of the Array to the Spinner
ArrayAdapter<String> spinnerArrayAdapter = new ArrayAdapter<String>(this,   android.R.layout.simple_spinner_item, colors);
spinnerArrayAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); // The drop down view
spinner.setAdapter(spinnerArrayAdapter);

回答3:

This worked for me with a string-array named \"shoes\" loaded from the projects resources:

    Spinner spinnerCountShoes = (Spinner)findViewById(R.id.spinner_countshoes);
    ArrayAdapter<String> spinnerCountShoesArrayAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_dropdown_item, getResources().getStringArray(R.array.shoes));
    spinnerCountShoes.setAdapter(spinnerCountShoesArrayAdapter);

This is my resource file (res/values/arrays.xml) with the string array:

    <?xml version=\"1.0\" encoding=\"utf-8\"?>
    <resources>
        <string-array name=\"shoes\">
            <item>0</item>
            <item>5</item>
            <item>10</item>
            <item>100</item>
            <item>1000</item>
            <item>10000</item>
        </string-array>
    </resources>

With this method it\'s easier to make it multilingual (if necessary).

回答4:

This actually worked for me

    Spinner spinner = new Spinner(this);
    ArrayAdapter<String> spinnerArrayAdapter = new ArrayAdapter<String>(
            this, android.R.layout.simple_spinner_item, spinnerArray);
    spinnerArrayAdapter.setDropDownViewResource( android.R.layout.simple_spinner_dropdown_item );

    spinner = (Spinner) findViewById( R.id.spinner );
    spinner.setAdapter(spinnerArrayAdapter);

回答5:

this work for me:-

String[] array = {\"A\", \"B\", \"C\"};
String abc = \"\";


Spinner spinner = new Spinner(getContext());
ArrayAdapter<String> spinnerArrayAdapter = new ArrayAdapter<String>(getContext(), android.R.layout.simple_spinner_item, array); //selected item will look like a spinner set from XML
spinnerArrayAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(spinnerArrayAdapter);

I am using a Fragment.