android自訂分頁組件

組件代碼如下：
[java]
public class PageControl extends LinearLayout implements OnClickListener{ 
    private ImageButton firstImg; 
    private ImageButton preImg; 
    private ImageButton nextImg; 
    private ImageButton endImg; 
    private TextView totalPageText; 
    private TextView curPageText; 
    private int numPerPage=10; 
    private int curPage=1; 
    private int count=0; 
    private OnPageChangeListener pageChangeListener;  
    public PageControl(Context context) { 
        super(context); 
        initPageComposite(context); 
    } 
    public PageControl(Context context, AttributeSet attrs) { 
        super(context, attrs); 
        initPageComposite(context); 
    } 
    public PageControl(Context context, AttributeSet attrs, int defStyle) { 
        super(context, attrs, defStyle); 
        initPageComposite(context); 
    } 
    private void initPageComposite(Context context){ 
        this.setPadding(5,5,5,5); 
        firstImg=new ImageButton(context); 
        firstImg.setId(1); 
        firstImg.setImageResource(R.drawable.firstpage); 
        firstImg.setPadding(0,0,0,0); 
        LayoutParams layoutParam=new LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT); 
        layoutParam.setMargins(0,0,5,0); 
        firstImg.setLayoutParams(layoutParam); 
        firstImg.setOnClickListener(this); 
        this.addView(firstImg); 
        preImg=new ImageButton(context); 
        preImg.setId(2); 
        preImg.setImageResource(R.drawable.prepage); 
        preImg.setPadding(0,0,0,0); 
        layoutParam=new LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT); 
        layoutParam.setMargins(0,0,5,0); 
        preImg.setLayoutParams(layoutParam); 
        preImg.setOnClickListener(this); 
        this.addView(preImg); 
        nextImg=new ImageButton(context); 
        nextImg.setId(3); 
        nextImg.setImageResource(R.drawable.nextpage); 
        nextImg.setPadding(0,0,0,0); 
        layoutParam=new LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT); 
        layoutParam.setMargins(0,0,5,0); 
        nextImg.setLayoutParams(layoutParam); 
        nextImg.setOnClickListener(this); 
        this.addView(nextImg); 
        endImg=new ImageButton(context); 
        endImg.setId(4); 
        endImg.setImageResource(R.drawable.lastpage); 
        endImg.setPadding(0,0,0,0); 
        layoutParam=new LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT); 
        layoutParam.setMargins(0,0,5,0); 
        endImg.setLayoutParams(layoutParam); 
        endImg.setOnClickListener(this); 
        this.addView(endImg); 
        totalPageText=new TextView(context); 
        layoutParam=new LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.MATCH_PARENT); 
        layoutParam.setMargins(5,0,5,0); 
        totalPageText.setLayoutParams(layoutParam); 
        totalPageText.setText("總頁數"); 
        this.addView(totalPageText); 
        curPageText=new TextView(context); 
        layoutParam=new LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.MATCH_PARENT); 
        layoutParam.setMargins(5,0,5,0); 
        curPageText.setLayoutParams(layoutParam); 
        curPageText.setText("當前頁"); 
        this.addView(curPageText); 
    } 
    /**
     * 初始化分頁組件的顯示狀態
     * @param newCount
     */ 
    public void initPageShow(int newCount){ 
        count=newCount; 
        int totalPage=count%numPerPage==0?count/numPerPage:count/numPerPage+1; 
        curPage=1; 
        firstImg.setEnabled(false); 
        preImg.setEnabled(false); 
        if(totalPage<=1){ 
            endImg.setEnabled(false); 
            nextImg.setEnabled(false); 
        }else{ 
            endImg.setEnabled(true); 
            nextImg.setEnabled(true); 
        } 
        totalPageText.setText("總頁數 "+totalPage); 
        curPageText.setText("當前頁 "+curPage); 
    } 
    /**
     * 分頁按鈕被點擊時更新狀態,該方法要在initPageShow後調用
     */ 
    @Override 
    public void onClick(View view) { 
        if(pageChangeListener==null){ 
            return; 
        } 
        int totalPage=count%numPerPage==0?count/numPerPage:count/numPerPage+1; 
        switch(view.getId()){ 
        case 1: 
            curPage=1; 
            firstImg.setEnabled(false); 
            preImg.setEnabled(false); 
            if(totalPage>1){ 
                nextImg.setEnabled(true); 
                endImg.setEnabled(true); 
            } 
            break; 
        case 2: 
            curPage--; 
            if(curPage==1){ 
                firstImg.setEnabled(false); 
                preImg.setEnabled(false); 
            } 
            if(totalPage>1){ 
                nextImg.setEnabled(true); 
                endImg.setEnabled(true); 
            } 
            break; 
        case 3: 
            curPage++; 
            if(curPage==totalPage){ 
                nextImg.setEnabled(false); 
                endImg.setEnabled(false); 
            } 
            firstImg.setEnabled(true); 
            preImg.setEnabled(true); 
            break; 
        case 4: 
            curPage=totalPage; 
            nextImg.setEnabled(false); 
            endImg.setEnabled(false); 
            firstImg.setEnabled(true); 
            preImg.setEnabled(true); 
            break; 
        default: 
            break; 
        } 
        totalPageText.setText("總頁數 "+totalPage); 
        curPageText.setText("當前頁 "+curPage); 
        pageChangeListener.pageChanged(curPage,numPerPage); 
    } 
    public OnPageChangeListener getPageChangeListener() { 
        return pageChangeListener; 
    } 
    /**
     * 設定分頁監聽事件
     * @param pageChangeListener
     */ 
    public void setPageChangeListener(OnPageChangeListener pageChangeListener) { 
        this.pageChangeListener = pageChangeListener; 
    } 
} 
分頁監聽器代碼：
[java]
/**
 * 分頁監聽事件
 */ 
public interface OnPageChangeListener { 
    /**
     * 點擊分頁按鈕時觸發此操作
     * @param curPage 當前頁
     * @param numPerPage 每頁顯示個數
     */ 
    public void pageChanged(int curPage,int numPerPage); 
} 
使用樣本：實現ListView分頁效果
Activity布局如下：
[html] 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:orientation="vertical" > 
    <ListView 
        android:id="@+id/wordList" 
        android:layout_width="match_parent" 
        android:layout_height="0dp" 
        android:layout_weight="11" > 
    </ListView> 
    <org.chen.wordreview.control.PageControl 
          android:id="@+id/wordListPageControl" 
          android:layout_width="match_parent" 
          android:layout_height="0dp" 
          android:layout_weight="1"/> 
</LinearLayout> 
Activity實現:
[java]
//實現分頁監聽介面 
public class MainActivity extends Activity implements OnPageChangeListener{ 
    private WordDao wordDao; 
    private ListView wordListView; 
    private ArrayAdapter<Word> adapter; 
    private PageControl pageControl; 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
        super.onCreate(savedInstanceState); 
        setContentView(R.layout.activity_wordlist); 
        ... 
        //初始化分頁組件 
        pageControl=(PageControl) findViewById(R.id.wordListPageControl); 
        pageControl.setPageChangeListener(this); 
        pageControl.initPageShow(wordDao.getCount()); 
        ... 
    } 
    /**
     * 點擊分頁按鈕時觸發該方法的執行
     * @param curPage 當前頁
     * @param numPerPage 每頁顯示記錄數
     */ 
    @Override 
    public void pageChanged(int curPage, int numPerPage) { 
        List<Word> words=wordDao.findOnePage((curPage-1)*numPerPage,numPerPage); 
        adapter.clear(); 
        adapter.addAll(words); 
        adapter.notifyDataSetChanged(); 
    } 
} 
分頁