天天看点
返回

Android如何愉快的使用Spinner列表选择框

Android如何愉快的使用Spinner列表选择框

说实话 我刚学习的时候，感觉这就是网页上的select标签，不过，这个标签可以带图，哈哈

Android如何愉快的使用Spinner列表选择框

是不是感觉像

又到了我们粘贴代码的时间了

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>

展示视图控制文件：MainActivity 

package run.yang.com.spinnerherodemo;

import android.content.Context;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;

import java.util.ArrayList;

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) {

    }
}

写个Hero.java，大家再不陌生吧 

package run.yang.com.spinnerherodemo;

/**
 * Created by yang_zzheng on 2016/7/15
 * [email protected]
 */
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;
    }
}

万能的BaseAdapter—->MyAdapter.java 

package run.yang.com.spinnerherodemo;

import android.content.Context;
import android.util.SparseArray;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

import java.util.ArrayList;

/**
 * Created by yang_zzheng on 2016/7/15
 * [email protected]
 */
public abstract class MyAdapter<T> extends BaseAdapter {

    private ArrayList<T> mData;
    private int mLayoutRes;           //布局id


    public MyAdapter() {
    }

    public MyAdapter(ArrayList<T> mData, int mLayoutRes) {
        this.mData = mData;
        this.mLayoutRes = mLayoutRes;
    }

    @Override
    public int getCount() {
        return mData != null ? mData.size() : ;
    }

    @Override
    public T getItem(int position) {
        return mData.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder = ViewHolder.bind(parent.getContext(), convertView, parent, mLayoutRes
                , position);
        bindView(holder, getItem(position));
        return holder.getItemView();
    }

    public abstract void bindView(ViewHolder holder, T obj);

    //添加一个元素
    public void add(T data) {
        if (mData == null) {
            mData = new ArrayList<>();
        }
        mData.add(data);
        notifyDataSetChanged();
    }

    //往特定位置，添加一个元素
    public void add(int position, T data) {
        if (mData == null) {
            mData = new ArrayList<>();
        }
        mData.add(position, data);
        notifyDataSetChanged();
    }

    public void remove(T data) {
        if (mData != null) {
            mData.remove(data);
        }
        notifyDataSetChanged();
    }

    public void remove(int position) {
        if (mData != null) {
            mData.remove(position);
        }
        notifyDataSetChanged();
    }

    public void clear() {
        if (mData != null) {
            mData.clear();
        }
        notifyDataSetChanged();
    }


    public static class ViewHolder {

        private SparseArray<View> mViews;   //存储ListView 的 item中的View
        private View item;                  //存放convertView
        private int position;               //游标
        private Context context;            //Context上下文

        //构造方法，完成相关初始化
        private ViewHolder(Context context, ViewGroup parent, int layoutRes) {
            mViews = new SparseArray<>();
            this.context = context;
            View convertView = LayoutInflater.from(context).inflate(layoutRes, parent, false);
            convertView.setTag(this);
            item = convertView;
        }

        //绑定ViewHolder与item
        public static ViewHolder bind(Context context, View convertView, ViewGroup parent,
                                      int layoutRes, int position) {
            ViewHolder holder;
            if (convertView == null) {
                holder = new ViewHolder(context, parent, layoutRes);
            } else {
                holder = (ViewHolder) convertView.getTag();
                holder.item = convertView;
            }
            holder.position = position;
            return holder;
        }

        @SuppressWarnings("unchecked")
        public <T extends View> T getView(int id) {
            T t = (T) mViews.get(id);
            if (t == null) {
                t = (T) item.findViewById(id);
                mViews.put(id, t);
            }
            return t;
        }


        /**
         * 获取当前条目
         */
        public View getItemView() {
            return item;
        }

        /**
         * 获取条目位置
         */
        public int getItemPosition() {
            return position;
        }

        /**
         * 设置文字
         */
        public ViewHolder setText(int id, CharSequence text) {
            View view = getView(id);
            if (view instanceof TextView) {
                ((TextView) view).setText(text);
            }
            return this;
        }

        /**
         * 设置图片
         */
        public ViewHolder setImageResource(int id, int drawableRes) {
            View view = getView(id);
            if (view instanceof ImageView) {
                ((ImageView) view).setImageResource(drawableRes);
            } else {
                view.setBackgroundResource(drawableRes);
            }
            return this;
        }


        /**
         * 设置点击监听
         */
        public ViewHolder setOnClickListener(int id, View.OnClickListener listener) {
            getView(id).setOnClickListener(listener);
            return this;
        }

        /**
         * 设置可见
         */
        public ViewHolder setVisibility(int id, int visible) {
            getView(id).setVisibility(visible);
            return this;
        }

        /**
         * 设置标签
         */
        public ViewHolder setTag(int id, Object obj) {
            getView(id).setTag(obj);
            return this;
        }

        //其他方法可自行扩展

    }

}

当然少不了我们的列表项目布局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="@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>

单纯的数组资源myarrays.xml 

<?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>

strings.xml这个不用解释吧 

<resources>
    <string name="app_name">SpinnerHeroDemo</string>
    <string name="action_settings">Settings</string>
    <string name="spin_title">分段选择</string>
</resources>

本文参考：

http://blog.csdn.net/coder_pig/article/details/48711881

android常用基本UI控件 android 标签 select Spinner
上一篇: 大厂 2 个 Vue 高级实践技巧总结，效率提升 80%！
下一篇: android中Spinner的使用

继续阅读