简单Spinner

来源：互联网发布：mac ps cs6永久序列号编辑：程序博客网时间：2024/04/30 10:15

mainActivity

package com.zzw.spinner;import android.app.Activity;import android.content.Context;import android.os.Bundle;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.AdapterView;import android.widget.AdapterView.OnItemSelectedListener;import android.widget.ArrayAdapter;import android.widget.Spinner;import android.widget.TextView;import android.widget.Toast;public class MainActivity extends Activity {    private String[] start_citys, end_citys;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        start_citys = getResources().getStringArray(R.array.start_city);        end_citys = getResources().getStringArray(R.array.end_city);        Spinner spinner1 = (Spinner) findViewById(R.id.spinner1);        spinner1.setAdapter(new MySpinnerAdapter(this, R.layout.item_start, R.id.TextView_start, start_citys));        Spinner spinner2 = (Spinner) findViewById(R.id.spinner2);        spinner2.setAdapter(new MySpinnerAdapter(this, R.layout.item_end, R.id.TextView_end, end_citys));        spinner1.setOnItemSelectedListener(new OnItemSelectedListener() {            @Override            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {                Toast.makeText(getApplicationContext(), start_citys[position], 0).show();            }            @Override            public void onNothingSelected(AdapterView<?> parent) {            }        });        spinner2.setOnItemSelectedListener(new OnItemSelectedListener() {            @Override            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {                Toast.makeText(getApplicationContext(), end_citys[position], 0).show();            }            @Override            public void onNothingSelected(AdapterView<?> parent) {            }        });    }    private class MySpinnerAdapter extends ArrayAdapter {        private Context context;        private int item;        private int R_textView;        private String[] citys;        LayoutInflater inflater;        public MySpinnerAdapter(Context context, int resource, int textViewResourceId, String[] citys) {            super(context, resource, textViewResourceId, citys);            this.context = context;            this.item = resource;            this.R_textView = textViewResourceId;            this.citys = citys;            inflater = LayoutInflater.from(context);        }        @Override        public int getCount() {            return citys.length;        }        // 下拉框中显示的view        @Override        public View getView(int position, View convertView, ViewGroup parent) {            if (convertView == null) {                convertView = inflater.inflate(item, null);            }            TextView textView = (TextView) convertView.findViewById(R_textView);            textView.setText(citys[position]);            return convertView;        }        // 显示的是下拉的列表view        // 如果数据没有从new的时候传递下来，那么不写这个方法有Resources$NotFoundException异常        @Override        public View getDropDownView(int position, View convertView, ViewGroup parent) {            if (convertView == null) {                convertView = inflater.inflate(item, null);            }            TextView textView = (TextView) convertView.findViewById(R_textView);            textView.setText(citys[position]);            return convertView;        }    }}

xml：

<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:orientation="horizontal"    tools:context="com.zzw.spinner.MainActivity" >       <Spinner           android:id="@+id/spinner1"           android:layout_weight="1"           android:layout_width="wrap_content"           android:layout_height="wrap_content"           />    <Spinner           android:id="@+id/spinner2"           android:layout_weight="1"           android:layout_width="wrap_content"           android:layout_height="wrap_content"           /></LinearLayout>

0 0