Android 的自定义Spinner组件实现方式

时间：2021-08-31 15:57:26

一、Android的API方式默认实现的方式

1.layout下编辑main_activity.xml

<RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin"

    android:paddingLeft="@dimen/activity_horizontal_margin"

    android:paddingRight="@dimen/activity_horizontal_margin"

    android:paddingTop="@dimen/activity_vertical_margin"

    tools:context=".MainActivity" >

    <Spinner

        android:id="@+id/spinner01"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:entries="@array/citys" />

    <Spinner

        android:id="@+id/spinner02"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_below="@id/spinner01" />

      <Spinner

        android:id="@+id/spinner03"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_below="@id/spinner02" />

</RelativeLayout>

　　2.string.xml代码

<?xml version="1.0" encoding="utf-8"?>

<resources>

    <string name="app_name">Android_015</string>

    <string name="action_settings">Settings</string>

    <string name="hello_world">Hello world!</string>

    <string-array name="citys">

        <item>北京</item>

        <item>上海</item>

        <item>广州</item>

        <item>深圳</item>

        <item>珠海</item>

        <item>湖州</item>

    </string-array>

    <string name="tv">TextView</string>

</resources>

　　3.layout下面的自定义的下拉选项样式 Spinner_layout.xml和me_layout.xml

<?xml version="1.0" encoding="utf-8"?>

<TextView xmlns:android="http://schemas.android.com/apk/res/android"

    android:id="@android:id/text1"

    android:layout_width="match_parent"

    android:layout_height="wrap_content"

    style="?android:attr/spinnerDropDownItemStyle"

    android:ellipsize="marquee"

    android:drawableLeft="@drawable/ic_launcher"

    android:textColor="#00ff00"

   />

me_layout.xml

<?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="@string/tv"

        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="@string/tv"

        android:textSize="25sp" />

</LinearLayout>

　　4.Java后台代码

package com.example.android_015;

import java.util.ArrayList;

import java.util.List;

import com.example.android_015.entity.Person;

import android.app.Activity;

import android.os.Bundle;

import android.view.Menu;

import android.view.View;

import android.widget.AdapterView;

import android.widget.AdapterView.OnItemSelectedListener;

import android.widget.ArrayAdapter;

import android.widget.Spinner;

import android.widget.Toast;

public class MainActivity extends Activity implements OnItemSelectedListener{

	private Spinner spinner,spinner03;

	@Override

	protected void onCreate(Bundle savedInstanceState) {

		super.onCreate(savedInstanceState);

		setContentView(R.layout.activity_main);

		spinner = (Spinner) findViewById(R.id.spinner02);

		spinner.setOnItemSelectedListener(this);

		// 获取string.xml的资源文件的数组

		String[] citys = getResources().getStringArray(R.array.citys);

		// 数组适配器的创建

		// 1.实例化的方式创建适配器

		ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,

				android.R.layout.simple_spinner_item, citys);

		// 2.API建议的方式创建adapt

		ArrayAdapter<CharSequence> adapter1 = ArrayAdapter.createFromResource(

				this, R.array.citys, android.R.layout.simple_spinner_item);

		adapter.setDropDownViewResource(R.layout.spinner_layout);

		//设置下拉试图的样式

		//adapter1.setDropDownViewResource(android.R.layout.simple_list_item_checked);

		spinner.setAdapter(adapter);

		//自定义的适配器下垃选项

		spinner03 = (Spinner) findViewById(R.id.spinner03);

		// 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

		spinner03.setAdapter(_MyAdapter);

	}

	@Override

	public boolean onCreateOptionsMenu(Menu menu) {

		getMenuInflater().inflate(R.menu.main, menu);

		return true;

	}

	//选中按钮的实现方法

	@Override

	public void onItemSelected(AdapterView<?> parent, View view, int position,long id) {

		System.out.println("parent:"+parent.getClass()); //父组件 spinner

		System.out.println("view:"+view.getClass()); //加载的下拉列表 xml类型 TextView

		System.out.println("position="+position);

		System.out.println("id="+id);

		//spinner.getSelectedItem().toString() 被选中的下拉列表值

		//spinner.getSelectedView() 被选中的 下垃组件属性

		//spinner.getSelectedItemPosition()  被选中的位置

		//spinner.getSelectedItemId() 被选中的id

		String str=parent.getItemAtPosition(position).toString();

		Toast.makeText(this, "你点击选中的是:"+str, 2000).show();

	}

	//未选中的实现方法

	@Override

	public void onNothingSelected(AdapterView<?> parent) {

	}

}

　　5.Person类

package com.example.android_015.entity;

/**

 * 用户对象

 * @author hbj403

 */

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;

	}

}

　　6、自定义MyAdapter适配器类

package com.example.android_015;

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;

import com.example.android_015.entity.Person;

/**

 * 自定义的适配器类

 * @author hbj403

 */

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;

	}

	//最主要代码

	@Override

	public View getView(int position, View convertView, ViewGroup parent) {

		LayoutInflater _LayoutInflater=LayoutInflater.from(mContext);

		convertView=_LayoutInflater.inflate(R.layout.me_layout, 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;

	}

}

　　二、运行方式截图

Android 的自定义Spinner组件实现方式

监听事件和第一种方法相同:

部分链接文档来自：转自：http://blog.csdn.net/jiangqq781931404/article/details/7285623

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