说道android下拉框spineer，框架中虽有现成的控件，但实际效果可能并不是我们所需要的那种，如下图：

其实我们更需要的是像WEB那种风格，如图所示：

其实实现也很简单，就是自定义个popwindow就可以了

下面贴上代码片段：

[java] view plain copy print ?
  1. publicclassSpinerPopWindowextendsPopupWindowimplementsOnItemClickListener{
  3. privateContextmContext;
  4. privateListViewmListView;
  5. privateNormalSpinerAdaptermAdapter;
  6. privateIOnItemSelectListenermItemSelectListener;
  9. publicSpinerPopWindow(Contextcontext)
  10. {
  11. super(context);
  13. mContext=context;
  14. init();
  15. }
  18. publicvoidsetItemListener(IOnItemSelectListenerlistener){
  19. mItemSelectListener=listener;
  20. }
  23. privatevoidinit()
  24. {
  25. Viewview=LayoutInflater.from(mContext).inflate(R.layout.spiner_window_layout,null);
  26. setContentView(view);
  27. setWidth(LayoutParams.WRAP_CONTENT);
  28. setHeight(LayoutParams.WRAP_CONTENT);
  30. setFocusable(true);
  31. ColorDrawabledw=newColorDrawable(0x00);
  32. setBackgroundDrawable(dw);
  35. mListView=(ListView)view.findViewById(R.id.listview);
  38. mAdapter=newNormalSpinerAdapter(mContext);
  39. mListView.setAdapter(mAdapter);
  40. mListView.setOnItemClickListener(this);
  41. }
  44. publicvoidrefreshData(List<String>list,intselIndex)
  45. {
  46. if(list!=null&&selIndex!=-1)
  47. {
  48. mAdapter.refreshData(list,selIndex);
  49. }
  50. }
  53. @Override
  54. publicvoidonItemClick(AdapterView<?>arg0,Viewview,intpos,longarg3){
  55. dismiss();
  56. if(mItemSelectListener!=null){
  57. mItemSelectListener.onItemClick(pos);
  58. }
  59. }
  63. }
主界面调用代码：

[java] view plain copy print ?
  1. publicclassSpinerWindowDemoActivityextendsActivityimplementsOnClickListener,AbstractSpinerAdapter.IOnItemSelectListener{
  2. /**Calledwhentheactivityisfirstcreated.*/
  4. privateViewmRootView;
  5. privateTextViewmTView;
  6. privateImageButtonmBtnDropDown;
  7. privateList<String>nameList=newArrayList<String>();
  10. @Override
  11. publicvoidonCreate(BundlesavedInstanceState){
  12. super.onCreate(savedInstanceState);
  13. setContentView(R.layout.main);
  15. setupViews();
  16. }
  19. privatevoidsetupViews(){
  20. mRootView=findViewById(R.id.rootView);
  22. mTView=(TextView)findViewById(R.id.tv_value);
  23. mBtnDropDown=(ImageButton)findViewById(R.id.bt_dropdown);
  24. mBtnDropDown.setOnClickListener(this);
  27. String[]names=getResources().getStringArray(R.array.hero_name);
  28. for(inti=0;i<names.length;i++){
  29. nameList.add(names[i]);
  30. }
  33. mSpinerPopWindow=newSpinerPopWindow(this);
  34. mSpinerPopWindow.refreshData(nameList,0);
  35. mSpinerPopWindow.setItemListener(this);
  36. }
  39. @Override
  40. publicvoidonClick(Viewview){
  41. switch(view.getId()){
  42. caseR.id.bt_dropdown:
  43. showSpinWindow();
  44. break;
  45. }
  46. }
  49. privatevoidsetHero(intpos){
  50. if(pos>=0&&pos<=nameList.size()){
  51. Stringvalue=nameList.get(pos);
  53. mTView.setText(value);
  54. }
  55. }
  58. privateSpinerPopWindowmSpinerPopWindow;
  59. privatevoidshowSpinWindow(){
  60. Log.e("","showSpinWindow");
  61. mSpinerPopWindow.setWidth(mTView.getWidth());
  62. mSpinerPopWindow.showAsDropDown(mTView);
  63. }
  66. @Override
  67. publicvoidonItemClick(intpos){
  68. setHero(pos);
  69. }
  71. }

就这么简单，具体UI美化大家再修改下xml就可以了

下面附上工程链接：

http://download.csdn.net/detail/geniuseoe2012/5184664


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/*=============================================================================*/

为使SpinerPopWindow更为通用，特修改或增加以下几个类

AbstractSpinerAdapter

[java] view plain copy print ?
  1. <SPANstyle="COLOR:#3366ff">publicabstractclassAbstractSpinerAdapter<T>extendsBaseAdapter{
  3. publicstaticinterfaceIOnItemSelectListener{
  4. publicvoidonItemClick(intpos);
  5. };
  7. privateContextmContext;
  8. privateList<T>mObjects=newArrayList<T>();
  9. privateintmSelectItem=0;
  11. privateLayoutInflatermInflater;
  13. publicAbstractSpinerAdapter(Contextcontext){
  14. init(context);
  15. }
  17. publicvoidrefreshData(List<T>objects,intselIndex){
  18. mObjects=objects;
  19. if(selIndex<0){
  20. selIndex=0;
  21. }
  22. if(selIndex>=mObjects.size()){
  23. selIndex=mObjects.size()-1;
  24. }
  26. mSelectItem=selIndex;
  27. }
  29. privatevoidinit(Contextcontext){
  30. mContext=context;
  31. mInflater=(LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
  32. }
  35. @Override
  36. publicintgetCount(){
  38. returnmObjects.size();
  39. }
  41. @Override
  42. publicObjectgetItem(intpos){
  43. returnmObjects.get(pos).toString();
  44. }
  46. @Override
  47. publiclonggetItemId(intpos){
  48. returnpos;
  49. }
  51. @Override
  52. publicViewgetView(intpos,ViewconvertView,ViewGrouparg2){
  53. ViewHolderviewHolder;
  55. if(convertView==null){
  56. convertView=mInflater.inflate(R.layout.spiner_item_layout,null);
  57. viewHolder=newViewHolder();
  58. viewHolder.mTextView=(TextView)convertView.findViewById(R.id.textView);
  59. convertView.setTag(viewHolder);
  60. }else{
  61. viewHolder=(ViewHolder)convertView.getTag();
  62. }
  65. Objectitem=getItem(pos);
  66. viewHolder.mTextView.setText(item.toString());
  68. returnconvertView;
  69. }
  71. publicstaticclassViewHolder
  72. {
  73. publicTextViewmTextView;
  74. }
  77. }</SPAN>


SpinerPopWindow

[java] view plain copy print ?
  1. publicclassSpinerPopWindowextendsPopupWindowimplementsOnItemClickListener{
  3. privateContextmContext;
  4. privateListViewmListView;
  5. privateAbstractSpinerAdaptermAdapter;
  6. privateIOnItemSelectListenermItemSelectListener;
  9. publicSpinerPopWindow(Contextcontext)
  10. {
  11. super(context);
  13. mContext=context;
  14. init();
  15. }
  18. publicvoidsetItemListener(IOnItemSelectListenerlistener){
  19. mItemSelectListener=listener;
  20. }
  22. publicvoidsetAdatper(AbstractSpinerAdapteradapter){
  23. mAdapter=adapter;
  24. mListView.setAdapter(mAdapter);
  25. }
  28. privatevoidinit()
  29. {
  30. Viewview=LayoutInflater.from(mContext).inflate(R.layout.spiner_window_layout,null);
  31. setContentView(view);
  32. setWidth(LayoutParams.WRAP_CONTENT);
  33. setHeight(LayoutParams.WRAP_CONTENT);
  35. setFocusable(true);
  36. ColorDrawabledw=newColorDrawable(0x00);
  37. setBackgroundDrawable(dw);
  40. mListView=(ListView)view.findViewById(R.id.listview);
  41. mListView.setOnItemClickListener(this);
  42. }
  45. public<T>voidrefreshData(List<T>list,intselIndex)
  46. {
  47. if(list!=null&&selIndex!=-1)
  48. {
  49. if(mAdapter!=null){
  50. mAdapter.refreshData(list,selIndex);
  51. }
  52. }
  53. }
  56. @Override
  57. publicvoidonItemClick(AdapterView<?>arg0,Viewview,intpos,longarg3){
  58. dismiss();
  59. if(mItemSelectListener!=null){
  60. mItemSelectListener.onItemClick(pos);
  61. }
  62. }
  66. }


CustemObject

[java] view plain copy print ?
  1. <SPANstyle="COLOR:#3366ff">publicclassCustemObject{
  3. publicStringdata="";
  5. @Override
  6. publicStringtoString(){
  7. //TODOAuto-generatedmethodstub
  8. returndata;
  9. }
  12. }</SPAN>

CustemSpinerAdapter

[java] view plain copy print ?
  1. publicclassCustemSpinerAdapterextendsAbstractSpinerAdapter<CustemObject>{
  3. publicCustemSpinerAdapter(Contextcontext){
  4. super(context);
  5. }
  7. }



SpinerWindowDemoActivity

[java] view plain copy print ?
  1. publicclassSpinerWindowDemoActivityextendsActivityimplementsOnClickListener,AbstractSpinerAdapter.IOnItemSelectListener{
  2. /**Calledwhentheactivityisfirstcreated.*/
  4. privateViewmRootView;
  5. privateTextViewmTView;
  6. privateImageButtonmBtnDropDown;
  7. privateList<CustemObject>nameList=newArrayList<CustemObject>();
  8. privateAbstractSpinerAdaptermAdapter;
  10. @Override
  11. publicvoidonCreate(BundlesavedInstanceState){
  12. super.onCreate(savedInstanceState);
  13. setContentView(R.layout.main);
  15. setupViews();
  16. }
  19. privatevoidsetupViews(){
  20. mRootView=findViewById(R.id.rootView);
  22. mTView=(TextView)findViewById(R.id.tv_value);
  23. mBtnDropDown=(ImageButton)findViewById(R.id.bt_dropdown);
  24. mBtnDropDown.setOnClickListener(this);
  27. String[]names=getResources().getStringArray(R.array.hero_name);
  28. for(inti=0;i<names.length;i++){
  29. CustemObjectobject=newCustemObject();
  30. object.data=names[i];
  31. nameList.add(object);
  32. }
  35. mAdapter=newCustemSpinerAdapter(this);
  36. mAdapter.refreshData(nameList,0);
  38. mSpinerPopWindow=newSpinerPopWindow(this);
  39. mSpinerPopWindow.setAdatper(mAdapter);
  40. mSpinerPopWindow.setItemListener(this);
  41. }
  44. @Override
  45. publicvoidonClick(Viewview){
  46. switch(view.getId()){
  47. caseR.id.bt_dropdown:
  48. showSpinWindow();
  49. break;
  50. }
  51. }
  54. privatevoidsetHero(intpos){
  55. if(pos>=0&&pos<=nameList.size()){
  56. CustemObjectvalue=nameList.get(pos);
  58. mTView.setText(value.toString());
  59. }
  60. }
  63. privateSpinerPopWindowmSpinerPopWindow;
  64. privatevoidshowSpinWindow(){
  65. Log.e("","showSpinWindow");
  66. mSpinerPopWindow.setWidth(mTView.getWidth());
  67. mSpinerPopWindow.showAsDropDown(mTView);
  68. }
  71. @Override
  72. publicvoidonItemClick(intpos){
  73. setHero(pos);
  74. }
  76. }


自定义一个类重写toString方法（CustemObject），自定义一个继承自AbstractSpinerAdapter的类确定对象类型（CustemSpinerAdapter）

构造具体的AbstractSpinerAdapter类对象（CustemSpinerAdapter）

通过refreshData填充数据，然后调用SpinerPopWindow的setAdatper设置数据源，OK大功告成！

新工程链接如下：http://download.csdn.net/detail/geniuseoe2012/5412647

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