1.相关属性


2.使用示例:

对了,Spinner会默认选中第一个值,就是默认调用spinner.setSection(0), 你可以通过这个设置默认的选中值,另外,会触发一次OnItemSelectedListener 事件,暂时没找到解决方法,下面折衷的处理是:添加一个boolean值,然后设置 为false,在onItemSelected时进行判断,false说明是默认触发的,不做任何操作 将boolean值设置为true;true的话则正常触发事件! 示例中写了两个不同的Spinner,从数据源,列表框风格等进行对比~ 接下来我们来看下

效果图

spinner模式(Spinner列表选项框的基本使用)(1)

代码实现

这里依然使用的我们前面的可复用BaseAdapter:

第一个Spinner的数据源编写:

res/values下编写一个:myarrays.xml的文件,内容如下:

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

<resources>

<string-array name="data">

<item>英勇青铜</item>

<item>不屈白银</item>

<item>荣耀黄金</item>

<item>华贵铂金</item>

<item>璀璨钻石</item>

<item>超凡大师</item>

<item>最强王者</item>

</string-array>

</resources>

接着是第二个Spinner的布局:item_spin_hero.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"

android:padding="5dp">

<ImageView

android:id="@ id/img_icon"

android:layout_width="48dp"

android:layout_height="48dp"

android:src="http://img.studyofnet.com@mipmap/iv_lol_icon1" />

<TextView

android:id="@ id/txt_name"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_marginLeft="10dp"

android:layout_marginTop="15dp"

android:text="德玛西亚"

android:textSize="16sp" />

</LinearLayout>

再接着编写一个Entitiy实体类:Hero.java

/**

* Created by Jay on 2015/9/24 0024.

*/

public class Hero {

private int hIcon;

private String hName;

public Hero() {

}

public Hero(int hIcon, String hName) {

this.hIcon = hIcon;

this.hName = hName;

}

public int gethIcon() {

return hIcon;

}

public String gethName() {

return hName;

}

public void sethIcon(int hIcon) {

this.hIcon = hIcon;

}

public void sethName(String hName) {

this.hName = hName;

}

}

最后是MainActivity的布局与Java代码部分:

布局文件:activity_main.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="vertical"

android:padding="5dp"

tools:context=".MainActivity">

<TextView

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="选择您的排位分段"

android:textColor="#44BDED"

android:textSize="18sp" />

<Spinner

android:id="@ id/spin_one"

android:layout_width="100dp"

android:layout_height="64dp"

android:entries="@array/data"

android:prompt="@string/spin_title"

android:spinnerMode="dialog" />

<TextView

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_marginTop="10dp"

android:text="选择你的拿手英雄~"

android:textColor="#F5684A"

android:textSize="18sp" />

<Spinner

android:id="@ id/spin_two"

android:layout_width="wrap_content"

android:layout_height="64dp" />

</LinearLayout>

MainActivity.java

public class MainActivity extends AppCompatActivity implements AdapterView.OnItemSelectedListener {

private Spinner spin_one;

private Spinner spin_two;

private Context mContext;

//判断是否为刚进去时触发onItemSelected的标志

private boolean one_selected = false;

private boolean two_selected = false;

private ArrayList<Hero> mData = null;

private BaseAdapter myAdadpter = null;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

mContext = MainActivity.this;

mData = new ArrayList<Hero>();

bindViews();

}

private void bindViews() {

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

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

mData.add(new Hero(R.mipmap.iv_lol_icon1,"迅捷斥候:提莫(Teemo)"));

mData.add(new Hero(R.mipmap.iv_lol_icon2,"诺克萨斯之手:德莱厄斯(Darius)"));

mData.add(new Hero(R.mipmap.iv_lol_icon3,"无极剑圣:易(Yi)"));

mData.add(new Hero(R.mipmap.iv_lol_icon4,"德莱厄斯:德莱文(Draven)"));

mData.add(new Hero(R.mipmap.iv_lol_icon5,"德邦总管:赵信(XinZhao)"));

mData.add(new Hero(R.mipmap.iv_lol_icon6,"狂战士:奥拉夫(Olaf)"));

myAdadpter = new MyAdapter<Hero>(mData,R.layout.item_spin_hero) {

@Override

public void bindView(ViewHolder holder, Hero obj) {

holder.setImageResource(R.id.img_icon,obj.gethIcon());

holder.setText(R.id.txt_name, obj.gethName());

}

};

spin_two.setAdapter(myAdadpter);

spin_one.setOnItemSelectedListener(this);

spin_two.setOnItemSelectedListener(this);

}

@Override

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

switch (parent.getId()){

case R.id.spin_one:

if(one_selected){

Toast.makeText(mContext,"您的分段是~:" parent.getItemAtPosition(position).toString(),

Toast.LENGTH_SHORT).show();

}else one_selected = true;

break;

case R.id.spin_two:

if(two_selected){

TextView txt_name = (TextView) view.findViewById(R.id.txt_name);

Toast.makeText(mContext,"您选择的英雄是~:" txt_name.getText().toString(),

Toast.LENGTH_SHORT).show();

}else two_selected = true;

break;

}

}

@Override

public void onNothingSelected(AdapterView<?> parent) {

}

}

另外关于Spinner的OnItemSelectedListener,以及如何获得选中项的值,就自己看上面的 代码啦~


3.代码示例下载:

SpinnerDemo.zip


本节小结

好的,本节给大家介绍了Spinner(下拉选项框)的使用,例子还是蛮有趣的,哈哈~!

spinner模式(Spinner列表选项框的基本使用)(2)

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