Andriod: 网格状RadioGroup的实现

package com.cnblogs.hibraincol; import java.util.ArrayList; import java.util.HashMap; import android.app.Activity; import android.os.Bundle; import android.widget.GridView; import android.widget.PopupWindow; import android.view.LayoutInflater; import android.view.MotionEvent; import android.view.ViewGroup; import android.view.ViewGroup.LayoutParams; import android.widget.Button; import android.view.View; import android.widget.SimpleAdapter; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.graphics.drawable.BitmapDrawable; import android.view.View.OnTouchListener; import android.view.Gravity; public class GridRadioGroup extends Activity { private PopupWindow mPopGridRadioGroup=null; private ViewGroup mViewGroup=null; private GridView mGrid=null; private SimpleAdapter mWishesAdapter; private int mLastItme=-1; private String[] mWishes = {"睡到自然醒", "钱多手抽筋", "加薪又升职", "妞多任我选"}; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); Button btnPop= (Button)findViewById(R.id.btn_pop); btnPop.setOnClickListener(new Button.OnClickListener(){ public void onClick(View v){ popGridRadioGroup(); } }); } private void popGridRadioGroup(){ if(mPopGridRadioGroup==null){ LayoutInflater mLayoutInflater = (LayoutInflater) getSystemService(LAYOUT_INFLATER_SERVICE); mWishesAdapter = getRadioButtonAdapter(R.drawable.btn_radio_off, mWishes); mViewGroup = (ViewGroup) mLayoutInflater.inflate(R.layout.radiogroup_gridview, null, true); mGrid = (GridView)mViewGroup.findViewById(R.id.gridview); mGrid.setAdapter(mWishesAdapter); mGrid.requestFocus(); mGrid.setOnItemClickListener( new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,long arg3) { if(mLastItme != arg2){ //更新图标、实现单选 if(mLastItme>=0){ ChangeRadioImg(mWishesAdapter, mLastItme,false); } mLastItme = arg2; ChangeRadioImg(mWishesAdapter,arg2,true); } } }); //注意，PopupWindow的第一个参数必须是没有父亲的view对象即顶层View。 mPopGridRadioGroup = new PopupWindow(mViewGroup, LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT,true); mPopGridRadioGroup.setBackgroundDrawable(new BitmapDrawable()); mPopGridRadioGroup.setTouchInterceptor(new OnTouchListener() { public boolean onTouch(View v, MotionEvent event) { if (event.getAction() == MotionEvent.ACTION_OUTSIDE) { mPopGridRadioGroup.dismiss(); return true; } return false; } }); } mPopGridRadioGroup.showAtLocation(findViewById(R.id.mainView), Gravity.CENTER, 0, 0); mPopGridRadioGroup.update(); } /* * 创建包含多个radiobutton的Adapter。 * RadioButton的图片有redioImg指定，RadioButton的文字由radioNameArray指定 * RadioButton的图片和文字的相对位置在item_radiobutton.xml布局文件中指定。 */ private SimpleAdapter getRadioButtonAdapter(int redioImage, String[] radioNameArray) { ArrayList<HashMap<String, Object>> data = new ArrayList<HashMap<String, Object>>(); for (int i = 0; i < radioNameArray.length; i++) { HashMap<String, Object> map = new HashMap<String, Object>(); map.put("itemRadioImg", redioImage); map.put("itemRadioText", radioNameArray[i]); data.add(map); } SimpleAdapter simperAdapter = new SimpleAdapter(this, data, R.layout.item_radiobutton, new String[] { "itemRadioImg", "itemRadioText" }, new int[] { R.id.item_radioimg, R.id.item_radiotext }); return simperAdapter; } /* * 根据选中的状态来更新图标。也就是实现我们自定义RadioGroup的单选功能 */ private void ChangeRadioImg(SimpleAdapter adapter,int selectedItem, boolean on) { HashMap<String, Object> map = (HashMap<String, Object>)adapter.getItem(selectedItem); if(on) map.put("itemRadioImg", R.drawable.btn_radio_on); else map.put("itemRadioImg", R.drawable.btn_radio_off); adapter.notifyDataSetChanged(); } }