Android中自定义下拉样式Spinner

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Android中自定义下拉样式Spinner

本文继续介绍android自定义控件系列，自定义Spinner控件的使用。

实现思路

1.定义下拉控件布局（ListView及子控件布局）

2.自定义SpinerPopWindow类

3.定义填充数据的Adapter

效果图

一、定义控件布局

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:background="#f2f2f2"    android:orientation="vertical"    android:padding="5dp" >    <LinearLayout        android:id="@+id/layout"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_margin="5dp"        android:background="#cbcbcb"        android:orientation="vertical"        android:padding="0.2px" >        <RelativeLayout            android:layout_width="wrap_content"            android:layout_height="42dp" >            <TextView                android:id="@+id/tv_value"                android:layout_width="match_parent"                android:layout_height="match_parent"                android:layout_centerVertical="true"                android:layout_marginRight="50dp"                android:background="#fff"                android:ellipsize="end"                android:gravity="left|center"                android:hint="请选择"                android:paddingLeft="10dp"                android:singleLine="true"                android:textColor="#ff000000"                android:textSize="18dp" >            </TextView>            <LinearLayout                android:id="@+id/bt_dropdown"                android:layout_width="50dp"                android:layout_height="match_parent"                android:layout_alignParentRight="true"                android:background="#fff"                android:gravity="center"                android:onClick="onClick" >                <ImageView                    android:layout_width="20dp"                    android:layout_height="15dp"                    android:background="@drawable/down_arrow" />            </LinearLayout>        </RelativeLayout>    </LinearLayout></RelativeLayout>

二、定义SpinerPopWindow类

package org.gaochun.widget;import java.util.List;import org.gaochun.R;import org.gaochun.adapter.SpinerAdapter;import org.gaochun.adapter.SpinerAdapter.IOnItemSelectListener;import android.content.Context;import android.graphics.drawable.ColorDrawable;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup.LayoutParams;import android.widget.AdapterView;import android.widget.AdapterView.OnItemClickListener;import android.widget.ListView;import android.widget.PopupWindow;/** * 自定义SpinerPopWindow类 * @author gao_chun * */public class SpinerPopWindow extends PopupWindow implements OnItemClickListener{    private Context mContext;    private ListView mListView;    private SpinerAdapter mAdapter;    private IOnItemSelectListener mItemSelectListener;    public SpinerPopWindow(Context context)    {        super(context);        mContext = context;        init();    }    public void setItemListener(IOnItemSelectListener listener){        mItemSelectListener = listener;    }    public void setAdatper(SpinerAdapter adapter){        mAdapter = adapter;        mListView.setAdapter(mAdapter);    }    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);        mListView.setOnItemClickListener(this);    }    public void refreshData(List<String> list, int selIndex)    {        if (list != null && selIndex  != -1)        {            if (mAdapter != null){                mAdapter.refreshData(list, selIndex);            }        }    }    @Override    public void onItemClick(AdapterView<?> arg0, View view, int pos, long arg3) {        dismiss();        if (mItemSelectListener != null){            mItemSelectListener.onItemClick(pos);        }    }}

三、定义Adapter

package org.gaochun.adapter;import java.util.List;import org.gaochun.R;import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.TextView;public class SpinerAdapter extends BaseAdapter {    public static interface IOnItemSelectListener{        public void onItemClick(int pos);    };    private List<String> mObjects;    private LayoutInflater mInflater;    public SpinerAdapter(Context context,List<String> mObjects){        this.mObjects = mObjects;        mInflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);    }    public void refreshData(List<String> objects, int selIndex){        mObjects = objects;        if (selIndex < 0){            selIndex = 0;        }        if (selIndex >= mObjects.size()){            selIndex = mObjects.size() - 1;        }    }    @Override    public int getCount() {        return mObjects.size();    }    @Override    public Object getItem(int pos) {        return mObjects.get(pos).toString();    }    @Override    public long getItemId(int pos) {        return pos;    }    @Override    public View getView(int pos, View convertView, ViewGroup arg2) {        ViewHolder viewHolder;        if (convertView == null) {            convertView = mInflater.inflate(R.layout.spiner_item_layout, null);            viewHolder = new ViewHolder();            viewHolder.mTextView = (TextView) convertView.findViewById(R.id.textView);            convertView.setTag(viewHolder);        } else {            viewHolder = (ViewHolder) convertView.getTag();        }        //Object item =  getItem(pos);        viewHolder.mTextView.setText(mObjects.get(pos));        return convertView;    }    public static class ViewHolder    {        public TextView mTextView;    }}

四、调用示例

public class MainActivity extends Activity implements OnClickListener,SpinerAdapter.IOnItemSelectListener{    private List<String>  mListType = new ArrayList<String>();  //类型列表    private TextView mTView;    private SpinerAdapter mAdapter;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_search);        mTView = (TextView) findViewById(R.id.tv_value);        //初始化数据        String[] names = getResources().getStringArray(R.array.array_name);        for(int i = 0; i < names.length; i++){            mListType.add(names[i]);        }        mAdapter = new SpinerAdapter(this,mListType);        mAdapter.refreshData(mListType,0);        //显示第一条数据        //mTView.setText(names[0]);        //初始化PopWindow        mSpinerPopWindow = new SpinerPopWindow(this);        mSpinerPopWindow.setAdatper(mAdapter);        mSpinerPopWindow.setItemListener(this);    }    //设置PopWindow    private SpinerPopWindow mSpinerPopWindow;    private void showSpinWindow(){        Log.e("", "showSpinWindow");        mSpinerPopWindow.setWidth(mTView.getWidth());        mSpinerPopWindow.showAsDropDown(mTView);    }    @Override    public void onClick(View v) {        switch (v.getId()) {            case R.id.bt_dropdown:                showSpinWindow();                break;        }    }    /* (non-Javadoc)     * @see org.gaochun.adapter.SpinerAdapter.IOnItemSelectListener#onItemClick(int)     */    @Override    public void onItemClick(int pos) {        // TODO Auto-generated method stub        if (pos >= 0 && pos <= mListType.size()){            String value = mListType.get(pos);            mTView.setText(value.toString());        }    }}

源码下载：http://download.csdn.net/download/gao_chun/8653069

五、自定义控件系列

Android项目中使用自定义进度加载Dialog：http://blog.csdn.net/gao_chun/article/details/45270031

ListView中按钮监听器设置及优化：http://blog.csdn.net/gao_chun/article/details/41249131

Android项目中自定义顶部标题栏：http://blog.csdn.net/gao_chun/article/details/45255929

Android自定义设置圆形图片控件：http://blog.csdn.net/gao_chun/article/details/39207557

android自定义底部Tab，项目整体界面框架：http://blog.csdn.net/gao_chun/article/details/37903673

自定义AlertDialog提示框：http://blog.csdn.net/gao_chun/article/details/37757571

转载注明出处.

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