main.xml布局文件:
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <Gallery android:id="@+id/gallery" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_marginTop="30dp" android:unselectedAlpha="1" android:spacing="1dip" /></LinearLayout>
values/attrs.xml:
<?xml version="1.0" encoding="utf-8"?><resources> <declare-styleable name="Gallery"> <attr name="android:galleryItemBackground" /> </declare-styleable></resources>
values/strings.xml:
<?xml version="1.0" encoding="utf-8"?> <resources> <string name="hello">Hello World, Date!</string> <string name="app_name">丸子-Widget</string> </resources>
drawable/tab_button_select.xml:
<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android"> <gradient android:startColor="#FF1B1B1B" android:endColor="#FF969696" android:angle="90.0"> </gradient></shape>
drawable/tab_button_unselect.xml:
<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android"> <gradient android:startColor="#FF000000" android:endColor="#FF474747" android:angle="90.0"> </gradient></shape>
IaiaiActivity.java类:
package com.iaiai.activity;import java.util.Arrays;import java.util.Collections;import java.util.List;import android.app.Activity;import android.content.Context;import android.content.res.TypedArray;import android.graphics.Color;import android.os.Bundle;import android.view.Gravity;import android.view.View;import android.view.ViewGroup;import android.widget.AdapterView;import android.widget.AdapterView.OnItemClickListener;import android.widget.BaseAdapter;import android.widget.Gallery;import android.widget.TextView;/** * * <p> * Title: IaiaiActivity.java * </p> * <p> * E-Mail: [email protected] * </p> * <p> * QQ: 176291935 * </p> * <p> * Http: iaiai.iteye.com * </p> * <p> * Create time: 2011-6-26 * </p> * * @author 丸子 * @version 0.0.1 */public class IaiaiActivity extends Activity { private Gallery gallery; private TabAdapter textAdapter; private static final String[] PROGRAM_NAMES = { "中央一台", "中央二台", "中央三台", "中央四台", "中央五台", "中央六台", "中央七台", "中央八台", }; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); gallery = (Gallery) findViewById(R.id.gallery); textAdapter = new TabAdapter(this, Arrays.asList(PROGRAM_NAMES)); gallery.setAdapter(textAdapter); gallery.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { TabAdapter adapter = (TabAdapter) parent.getAdapter(); adapter.setSelectedPos(position); } }); } public class TabAdapter extends BaseAdapter { private Context mContext; private List<String> mList; private int mSelectedPos; public TabAdapter(Context context, List<String> list) { mContext = context; TypedArray a = obtainStyledAttributes(R.styleable.Gallery); a.recycle(); if (list == null) list = Collections.emptyList(); mList = list; } public void setSelectedPos(int pos) { if (pos != mSelectedPos) { mSelectedPos = pos; notifyDataSetChanged(); } } public int getSelectedPos() { return mSelectedPos; } public int getCount() { return mList.size(); } public Object getItem(int position) { return mList.get(position); } public long getItemId(int position) { return position; } public View getView(int position, View convertView, ViewGroup parent) { TextView text = null; if (convertView == null) { text = new TextView(mContext); } else { text = (TextView) convertView; } text.setTextColor(Color.WHITE); text.setText(mList.get(position)); text.setLayoutParams(new Gallery.LayoutParams(102, 40)); text.setGravity(Gravity.CENTER); if (position == mSelectedPos) text.setBackgroundResource(R.drawable.tab_button_select); else text.setBackgroundResource(R.drawable.tab_button_unselect); return text; } }}
运行结果:
