Android使用popueWindow自定义Spinner

其实就是很简单的控件自定义，只不过这两天项目用到，还是到处搜改了下，现简单记录。方便有需要的时候修改为自己使用：

需求

一个TextView或者Button点击的时候要弹出一些下拉选择框，可能TextView/Button还要变色或者图标变化：

实现思路

点击Textview的时候弹出一个popupWindow（后文简写），popWind布局是一个RelativeLayout或者LinearLayout，里面一个ListView/Recyclerview，它的item自己根据需要定义。

简单代码

1，MainActivity.java 程序入口，初始化数据，初始化自定义popWind，TextView点击之后显示popWind，处理ListView的点击事件：

/** * 主Activity  用来实现popupwindow * @author ansen */
public class MainActivity extends Activity {  private SpinerPopWindow<String> mSpinerPopWindow;  private List<String> list;  private TextView tvValue;  @Override  protected void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentView(R.layout.activity_main);  initData();  tvValue = (TextView) findViewById(R.id.tv_value);  tvValue.setOnClickListener(clickListener);  mSpinerPopWindow = new SpinerPopWindow<String>(this, list);mSpinerPopWindow.setOnItemListener(dismissListener);mSpinerPopWindow.setOnDismissListener(dismissListener);  }  /** * 监听popupwindow取消 */  private OnDismissListener  dismissListener=new OnDismissListener() {  @Override  public void onDismiss() {  setTextImage(R.drawable.icon_down);  }  };  /** * popupwindow显示的ListView的item点击事件 */  private OnItemClickListener itemClickListener = new OnItemClickListener() {  @Override  public void onItemClick(AdapterView<?> parent, View view, int position,long id) {  mSpinerPopWindow.dismiss();  tvValue.setText(list.get(position));  Toast.makeText(MainActivity.this, "点击了:" + list.get(position),Toast.LENGTH_LONG).show();  }  };  /** * 显示PopupWindow */  private OnClickListener clickListener = new OnClickListener() {  @Override  public void onClick(View v) {  switch (v.getId()) {  case R.id.tv_value:  mSpinerPopWindow.setWidth(tvValue.getWidth());  mSpinerPopWindow.showAsDropDown(tvValue);  setTextImage(R.drawable.icon_up);  break;  }  }  };  /** * 初始化数据 */  private void initData() {  list = new ArrayList<String>();  for (int i = 0; i < 5; i++) {  list.add("test:" + i);  }  }  /** * 给TextView右边设置图片 * @param resId */  private void setTextImage(int resId) {  Drawable drawable = getResources().getDrawable(resId);  drawable.setBounds(0, 0, drawable.getMinimumWidth(),drawable.getMinimumHeight());// 必须设置图片大小，否则不显示  tvValue.setCompoundDrawables(null, null, drawable, null);  }
}

2，activity_main.xml 这个文件也没啥好说的，就是两个TextView：

<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" >  <LinearLayout  android:layout_width="match_parent"  android:layout_height="wrap_content"  android:layout_margin="5dp"  android:orientation="horizontal">  <TextView  android:id="@+id/tv_value"  android:layout_width="0dp"  android:layout_height="wrap_content"  android:layout_weight="1"  android:background="@drawable/shape_help_category_tv_bg"  android:drawableRight="@drawable/icon_down"  android:padding="10dp"  android:textColor="@color/content_color"  android:text="请选择父类别"  android:textSize="20sp"/>  <TextView  android:layout_marginLeft="5dp"  android:layout_width="0dp"  android:layout_height="wrap_content"  android:layout_weight="1"  android:background="@drawable/shape_help_category_tv_bg"  android:drawableRight="@drawable/icon_down"  android:textColor="@color/content_color"  android:padding="10dp"  android:text="请选择子类别"  android:textSize="20sp" />  </LinearLayout>
</LinearLayout>

3，SpinerPopWindow.java 自定义Popupwindow类，初始化popWind显示的布局，以及一些参数，并且给listView设置适配器：

* 自定义PopupWindow  主要用来显示ListView  * @author Jason* @create time 2022-3  */
public class SpinerPopWindow<T> extends PopupWindow {  private LayoutInflater inflater;  private ListView mListView;  private List<T> list;  private MyAdapter  mAdapter;  public SpinerPopWindow(Context context,List<T> list) {  super(context);  inflater=LayoutInflater.from(context);  this.list=list;  View view = inflater.inflate(R.layout.spiner_window_layout, null);  setContentView(view);//大小怎么设置，或者不设置，根据自己需要         setWidth(LayoutParams.WRAP_CONTENT);  setHeight(LayoutParams.WRAP_CONTENT);  setFocusable(true);  ColorDrawable dw = new ColorDrawable(0x00);  setBackgroundDrawable(dw);  mListView = (ListView) view.findViewById(R.id.listview);mAdapter=new MyAdapter()mListView.setAdapter(mAdapter);  }  private void SetOnItemListener(OnItemClickListener clickListener){  if(mListView != null){mListView.setOnItemClickListener(clickListener);  }}  private class MyAdapter extends BaseAdapter{  @Override  public int getCount() {  return list.size();  }  @Override  public Object getItem(int position) {  return list.get(position);  }  @Override  public long getItemId(int position) {  return position;  }  @Override  public View getView(int position, View convertView, ViewGroup parent) {  ViewHolder holder=null;  if(convertView==null){  holder=new ViewHolder();// 这个spiner_item_layout就是根据自己需要定义，比如仅一个textviewconvertView=inflater.inflate(R.layout.spiner_item_layout, null);  holder.tvName=(TextView) convertView.findViewById(R.id.tv_name);  convertView.setTag(holder);  }else{  holder=(ViewHolder) convertView.getTag();  }  holder.tvName.setText(getItem(position).toString());  return convertView;  }  }  private class ViewHolder{  private TextView tvName;  }
}

4，spiner_window_layout.xml，popWind显示的布局文件，里面就一个ListView控件：

<?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="wrap_content"  android:layout_alignParentRight="true"  android:orientation="vertical">  <ListView  android:id="@+id/listview"  android:layout_width="match_parent"  android:layout_height="wrap_content"   android:background="@drawable/shape_popupwindow_list_bg"  android:scrollbars="none" >  </ListView>
</LinearLayout>

各部分代码根据自身需要修改，比如listView-item，或者点击事件等。