安卓開發之自訂下拉重新整理頭部

一直用的下拉重新整理庫就是android-Ultra-Pull-to-Refresh，本身這個庫就帶有幾種樣式的下拉重新整理頭部，大家可以去git看一下，地址https://github.com/liaohuqiu/android-Ultra-Pull-To-Refresh。最為方便的是我們可以自己定製各式各樣的頭部。最近項目有個自訂的下拉頭部，自己研究了一下。實現效果是：

我們要做的就是自己寫一個樣式xml檔案，然後實現PtrUIHandler這個介面，代碼如下：

public class LoadMoreFooterView extends FrameLayout implements PtrUIHandler {
    private LayoutInflater inflater;
 
    // 下拉重新整理視圖（頭部視圖）
    private ViewGroup headView;
 
    // 下拉重新整理文字
    private TextView tvHeadTitle;
 
    // 下拉表徵圖
    private ImageView ivWindmill;
 
  //  private WindmillDrawable drawable;
 
    public LoadMoreFooterView(Context context) {
        this(context, null);
    }
 
    public LoadMoreFooterView(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }
 
    public LoadMoreFooterView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init(context);
    }
 
    /**
     * 初始化
     *
     * @param context
     */
    private void init(Context context) {
 
        inflater = LayoutInflater.from(context);
        /**
         * 頭部
         */
        headView = (ViewGroup) inflater.inflate(R.layout.widget_header, this, true);
        ivWindmill = (ImageView) headView.findViewById(R.id.iv_windmill);
        tvHeadTitle = (TextView) headView.findViewById(R.id.tv_head_title);
        ivWindmill.setVisibility(VISIBLE);
        ivWindmill.setImageResource(R.mipmap.icon_logo);
        tvHeadTitle.setText("下拉重新整理");
 
    }
 
    @Override
    public void onUIReset(PtrFrameLayout ptrFrameLayout) {
        tvHeadTitle.setText("下拉重新整理");
 
    }
 
    @Override
    public void onUIRefreshPrepare(PtrFrameLayout ptrFrameLayout) {
        tvHeadTitle.setText("下拉重新整理");
    }
 
    @Override
    public void onUIRefreshBegin(PtrFrameLayout ptrFrameLayout) {
        tvHeadTitle.setText("正在重新整理");
 
    }
 
    @Override
    public void onUIRefreshComplete(PtrFrameLayout ptrFrameLayout) {
        ivWindmill.clearAnimation();
        tvHeadTitle.setText("重新整理完成");
    }
 
    @Override
    public void onUIPositionChange(PtrFrameLayout frame, boolean isUnderTouch, byte status, PtrIndicator ptrIndicator) {
        final int mOffsetToRefresh = frame.getOffsetToRefresh();
        final int currentPos = ptrIndicator.getCurrentPosY();
        final int lastPos = ptrIndicator.getLastPosY();
 
        if (currentPos < mOffsetToRefresh && lastPos >= mOffsetToRefresh) {
            if (isUnderTouch && status == PtrFrameLayout.PTR_STATUS_PREPARE) {
                tvHeadTitle.setText("下拉重新整理");
            }
        } else if (currentPos > mOffsetToRefresh && lastPos <= mOffsetToRefresh) {
            if (isUnderTouch && status == PtrFrameLayout.PTR_STATUS_PREPARE) {
                tvHeadTitle.setText("鬆開重新整理");
            }
        }
 
    }
 
}

使用：

 

/* 建立自訂重新整理頭部view */
LoadMoreFooterView header = new LoadMoreFooterView(this);
/* 設定重新整理頭部view */
ptr_view.setHeaderView(header);
/* 設定回調 */
ptr_view.addPtrUIHandler(header);
ptr_view.setPtrHandler(new PtrHandler() {
    @Override
    public boolean checkCanDoRefresh(PtrFrameLayout frame, View content, View header) {
        return PtrDefaultHandler.checkContentCanBePulledDown(frame, content, header);
    }
 
    @Override
    public void onRefreshBegin(PtrFrameLayout frame) {
        ptr_view.postDelayed(new Runnable() {
            @Override
            public void run() {
              
                getdata();
            }
        }, 2000);
    }
});
    /* 延時100秒,自動重新整理 */
ptr_view.postDelayed(new Runnable() {
    @Override
    public void run() {
        ptr_view.autoRefresh();
    }
}, 100);