使用arrayadapter和自定义adapter
(一):使用ArrayAdapter进行适配数据:
①:首先定义一个布局文件:
- <span style="font-size:16px;"><?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"
- />
- </LinearLayout></span>
- <span style="font-size:16px;"> </span>
【注意:】上面的Spinner有两个属性1:prompt是初始的时候,Spinner显示的数据,是一个引用类型 2:entries是直接在xml布局文件中绑定数据源(可以不设置,即可以在Activity中动态绑定)
②:建立数据源,使用数组,这些数据将会在Spinner下来列表中进行显示:
- <span style="font-size:16px;"><?xml version="1.0" encoding="utf-8"?>
- <resources>
- <string-array name="spinnername">
- <item>北京</item>
- <item>上海 </item>
- <item>广州</item>
- <item>深圳</item>
- </string-array>
- </resources></span>
③:接着在Activity中加入如下的代码(使用了系统定义的下拉列表的布局文件,当然也可以自定义)
- // 初始化控件
- mSpinner = (Spinner) findViewById(R.id.spinner1);
- // 建立数据源
- String[] mItems = getResources().getStringArray(R.array.spinnername);
- // 建立Adapter并且绑定数据源
- ArrayAdapter<String> _Adapter=new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item, mItems);
- //绑定 Adapter到控件
- mSpinner.setAdapter(_Adapter);
以上代码初步完成,看下运行效果:
下面是关于Spinner的点击事件(效果图如上图):
- mSpinner.setOnItemSelectedListener(new OnItemSelectedListener() {
- @Override
- public void onItemSelected(AdapterView<?> parent, View view,
- int position, long id) {
- String str=parent.getItemAtPosition(position).toString();
- Toast.makeText(SpinnerActivity.this, "你点击的是:"+str, 2000).show();
- }
- @Override
- public void onNothingSelected(AdapterView<?> parent) {
- // TODO Auto-generated method stub
- }
- );
(二)使用自定义的Adapter(重点)
①:定义每一个Item的布局文件
- <?xml version="1.0" encoding="utf-8"?>
- <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:layout_width="match_parent"
- android:layout_height="match_parent"
- android:orientation="horizontal" >
- <TextView
- android:id="@+id/textView1"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:drawableLeft="@drawable/ic_launcher"
- android:paddingRight="8dip"
- android:paddingTop="8dip"
- android:text="TextView"
- android:textSize="25sp" />
- <TextView
- android:id="@+id/textView2"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:paddingLeft="8dip"
- android:paddingTop="8dip"
- android:text="TextView"
- android:textSize="25sp" />
- </LinearLayout>
②:建立Person类:
- package com.jiangqq.csdn;
- public class Person {
- private String personName;
- private String personAddress;
- public Person(String personName, String personAddress) {
- super();
- this.personName = personName;
- this.personAddress = personAddress;
- }
- public String getPersonName() {
- return personName;
- }
- public void setPersonName(String personName) {
- this.personName = personName;
- }
- public String getPersonAddress() {
- return personAddress;
- }
- public void setPersonAddress(String personAddress) {
- this.personAddress = personAddress;
- }
- }
③:创建MyAdapter继承与BaseAdapter,进行适配:
- package com.jiangqq.csdn;
- import java.util.List;
- import android.content.Context;
- import android.view.LayoutInflater;
- import android.view.View;
- import android.view.ViewGroup;
- import android.widget.BaseAdapter;
- import android.widget.TextView;
- /**
- * 自定义适配器类
- * @author jiangqq <a href=http://blog.csdn.net/jiangqq781931404></a>
- *
- */
- public class MyAdapter extends BaseAdapter {
- private List<Person> mList;
- private Context mContext;
- public MyAdapter(Context pContext, List<Person> pList) {
- this.mContext = pContext;
- this.mList = pList;
- }
- @Override
- public int getCount() {
- return mList.size();
- }
- @Override
- public Object getItem(int position) {
- return mList.get(position);
- }
- @Override
- public long getItemId(int position) {
- return position;
- }
- /**
- * 下面是重要代码
- */
- @Override
- public View getView(int position, View convertView, ViewGroup parent) {
- LayoutInflater _LayoutInflater=LayoutInflater.from(mContext);
- convertView=_LayoutInflater.inflate(R.layout.item, null);
- if(convertView!=null)
- {
- TextView _TextView1=(TextView)convertView.findViewById(R.id.textView1);
- TextView _TextView2=(TextView)convertView.findViewById(R.id.textView2);
- _TextView1.setText(mList.get(position).getPersonName());
- _TextView2.setText(mList.get(position).getPersonAddress());
- }
- return convertView;
- }
- }
④:在Activity中加入如下代码:
- // 初始化控件
- mSpinner = (Spinner) findViewById(R.id.spinner1);
- // 建立数据源
- List<Person> persons=new ArrayList<Person>();
- persons.add(new Person("张三", "上海 "));
- persons.add(new Person("李四", "上海 "));
- persons.add(new Person("王五", "北京" ));
- persons.add(new Person("赵六", "广州 "));
- // 建立Adapter绑定数据源
- MyAdapter _MyAdapter=new MyAdapter(this, persons);
- //绑定Adapter
- mSpinner.setAdapter(_MyAdapter);
运行效果如下截图:
监听事件和第一种方法相同:
摘自:http://blog.csdn.net/developer_jiangqq/article/details/7285623