Custom pull-down style Spinner and androidspinner in Android

Custom pull-down style Spinner and androidspinner in Android

Custom pull-down style Spinner in Android

This article continues to introduce the android custom control series and the use of custom Spinner controls.

Implementation

1. Define the drop-down control layout (ListView and child control layout)

2. Custom SpinerPopWindow class

3. Define the Adapter for data Filling

1. Define the control layout

<? 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 = "Please select" 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>

Ii. Define the SpinerPopWindow class

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 andro Id. widget. adapterView. onItemClickListener; import android. widget. listView; import android. widget. popupWindow;/*** custom SpinerPopWindow class * @ author gao_chun **/public class SpinerPopWindow extends PopupWindow implements OnItemClickListener {private Context mContext; private ListView mListView; private SpinerAdapter mAdapter; private IOnItemSelectListener mItemSelectListener; public SpinerPopWindow (Con Text 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 = LayoutInflater. from (mContext ). inflate (R. layout. spiner_window_layout, null); setContentView (view); setWidth (L AyoutParams. 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 );}}}

3. Define the 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;    }}

Iv. Call example

Public class MainActivity extends Activity implements OnClickListener, SpinerAdapter. IOnItemSelectListener {private List <String> mListType = new ArrayList <String> (); // type List 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); // initialize the data 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); // display the first data // mTView. setText (names [0]); // initialize PopWindow mSpinerPopWindow = new SpinerPopWindow (this); mSpinerPopWindow. setAdatper (mAdapter); mSpinerPopWindow. setItemListener (this);} // set 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 & amp; pos <= mListType. size () {String value = mListType. get (pos); mTView. setText (value. toString ());}}}

Download source code:Http://download.csdn.net/download/gao_chun/8653069

V. Custom Control Series

Loading Dialog: http://blog.csdn.net/gao_chun/article/details/45270031 with custom progress in Android Projects

Button listener settings and Optimization in ListView: http://blog.csdn.net/gao_chun/article/details/41249131

Android project custom top title bar: http://blog.csdn.net/gao_chun/article/details/45255929

Android custom set circular image controls: http://blog.csdn.net/gao_chun/article/details/39207557

Android custom bottom Tab, project overall interface framework: http://blog.csdn.net/gao_chun/article/details/37903673

Custom AlertDialog prompt box: http://blog.csdn.net/gao_chun/article/details/37757571

Reprinted to indicate the source.