自定义下拉框兑现（android）

自定义下拉框实现（android）

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：

public class SpinerPopWindow extends PopupWindow implements OnItemClickListener{

	private Context mContext;
	private ListView mListView;
	private NormalSpinerAdapter mAdapter;
	private IOnItemSelectListener mItemSelectListener;
	
	
	public SpinerPopWindow(Context context)
	{
		super(context);
		
		mContext = context;
		init();
	}
	
	
	public void setItemListener(IOnItemSelectListener listener){
		mItemSelectListener = listener;
	}

	
	private void init()
	{
		View view = LayoutInflater.from(mContext).inflate(R.layout.spiner_window_layout, null);
		setContentView(view);		
		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 NormalSpinerAdapter(mContext);	
		mListView.setAdapter(mAdapter);	
		mListView.setOnItemClickListener(this);
	}
	
	
	public void refreshData(List<String> list, int selIndex)
	{
		if (list != null && selIndex  != -1)
		{
			mAdapter.refreshData(list, selIndex);
		}
	}


	@Override
	public void onItemClick(AdapterView<?> arg0, View view, int pos, long arg3) {
		dismiss();
		if (mItemSelectListener != null){
			mItemSelectListener.onItemClick(pos);
		}
	}


	
}

主界面调用代码：

public class SpinerWindowDemoActivity extends Activity implements OnClickListener, AbstractSpinerAdapter.IOnItemSelectListener{
    /** Called when the activity is first created. */
	
	private View mRootView;
	private TextView mTView;
	private ImageButton mBtnDropDown;
	private List<String> nameList = new ArrayList<String>();

	
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        setupViews();
    }
    
    
    private void setupViews(){
    	mRootView = findViewById(R.id.rootView);
		
    	mTView = (TextView) findViewById(R.id.tv_value);
		mBtnDropDown = (ImageButton) findViewById(R.id.bt_dropdown);
		mBtnDropDown.setOnClickListener(this);
		
		
		String[] names = getResources().getStringArray(R.array.hero_name);
		for(int i = 0; i < names.length; i++){
			nameList.add(names[i]);
		}
		

		mSpinerPopWindow = new SpinerPopWindow(this);
		mSpinerPopWindow.refreshData(nameList, 0);
		mSpinerPopWindow.setItemListener(this);
    }


	@Override
	public void onClick(View view) {
		switch(view.getId()){
		case R.id.bt_dropdown:
			showSpinWindow();
			break;
		}
	}
	

	private void setHero(int pos){
		if (pos >= 0 && pos <= nameList.size()){
			String value = nameList.get(pos);
		
			mTView.setText(value);
		}
	}

	
	private SpinerPopWindow mSpinerPopWindow;
	private void showSpinWindow(){
		Log.e("", "showSpinWindow");
		mSpinerPopWindow.setWidth(mTView.getWidth());
		mSpinerPopWindow.showAsDropDown(mTView);
	}


	@Override
	public void onItemClick(int pos) {
		setHero(pos);
	}

}

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.****.net/detail/geniuseoe2012/5184664

more brilliant，Please pay attention to my **** blog -->http://blog.****.net/geniuseoe2012