Android如何愉快的使用Spinner列表选择框
2016-07-15 15:18
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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
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 * yangzhizheng2012@163.com */ 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 * yangzhizheng2012@163.com */ 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() : 0; } @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相关文章推荐
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