Spinner控件：下拉列表

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简单的spinner举例，一言不合上代码：

这里写图片描述

public class SpinnerActivity extends BaseActivity {    private TextView textView,textView1;    private Spinner spinner_1;    private ArrayAdapter<String> adapter_1;    private List<String> lists_1;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.spinner_layout);        spinner_1 = (Spinner) findViewById(R.id.spinner_1);        textView = (TextView) findViewById(R.id.textView);        //1.设置数据源        lists_1 = new ArrayList<String>();        lists_1.add("北京");        lists_1.add("上海");        lists_1.add("广州");        lists_1.add("深圳");        //2.设置适配器        adapter_1 = new ArrayAdapter<String>(SpinnerActivity.this, android.R.layout.simple_spinner_item, lists_1);        //3.设置下拉样式        adapter_1.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);        //4.加载适配器        spinner_1.setAdapter(adapter_1);        //5.设置监听        spinner_1.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {            @Override            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {                String cityName = adapter_1.getItem(position);                textView.setText("您选择了: " + cityName);            }            @Override            public void onNothingSelected(AdapterView<?> parent) {}        });}

第2步加载适配器和第3步设置下拉样式都是采用android自带的样式哦

自定义spinner控件：
这里写图片描述

 //1.设置数据源        getData();        //2.配置适配器        adapter_2 = new SimpleAdapter(SpinnerActivity.this,lists_2,R.layout.spinner_item,new String[]{"image","text"},new int[]{R.id.image,R.id.textView});        //3.设置下拉样式        adapter_2.setDropDownViewResource(R.layout.spinner_item);        //4.加载适配器        spinner_2.setAdapter(adapter_2);        //5.设置监听        spinner_2.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {            @Override            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {                String cityName = lists_2.get(position).get("text").toString();                textView1.setText("您选择了: "+cityName);            }            @Override            public void onNothingSelected(AdapterView<?> parent) {            }        });    }    private List<Map<String, Object>> getData() {        lists_2 = new ArrayList<Map<String, Object>>();        Map<String, Object> map1 = new HashMap<String, Object>();        map1.put("image", R.mipmap.ic_launcher);        map1.put("text", "北京");        Map<String, Object> map2 = new HashMap<String, Object>();        map2.put("image", R.mipmap.ic_launcher);        map2.put("text", "上海");        Map<String, Object> map3 = new HashMap<String, Object>();        map3.put("image", R.mipmap.ic_launcher);        map3.put("text", "广州");        Map<String, Object> map4 = new HashMap<String, Object>();        map4.put("image", R.mipmap.ic_launcher);        map4.put("text", "深圳");        lists_2.add(map1);        lists_2.add(map2);        lists_2.add(map3);        lists_2.add(map4);        return lists_2;    }

依然是SimpleAdapter的使用，不过这一次子项布局采用了我们自创的布局哦（左边ImageView右边TextView）

注意，监听事件是setOnItemSelectedListener！！还有不要忘了setDropDownViewResource来设置下拉菜单的样式哦

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