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Android中自定义下拉样式Spinner

来源:程序员人生   发布时间:2015-05-12 09:01:31 阅读次数:2917次

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





1、定义控件布局

<?xml version="1.0" encoding="utf⑻"?> <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>

2、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 != ⑴) { 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); } } }

3、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; } }


4、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1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




5、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


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