Android 自定義分頁組件

組件代碼如下：

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后調用
 */
@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;
}
/**
 * 設置分頁監聽事件
 * @param pageChangeListener
 */
public void setPageChangeListener(OnPageChangeListener pageChangeListener) {
    this.pageChangeListener = pageChangeListener;
}

}</pre>分頁監聽器代碼： 

/**


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);
}</pre>使用示例：實現ListView分頁效果 

Activity布局如下： 

<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: 

//實現分頁監聽接口
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();
}
}</pre>分頁效果圖