Android Open Source - hpush Web View Ex

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Back to project page hpush.

License

The source code is released under:

MIT License

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Java Source Code

package com.hpush.views;
/*from ww w  .  jav  a 2s  . c  o  m*/
import android.content.Context;
import android.util.AttributeSet;
import android.webkit.WebView;

/**
 * An extension of standard WebView that we can detect which direction user scrolled.
 *
 * @author Xinyue Zhao
 */
public final class WebViewEx extends WebView {
  /**
   * A listener hooks the WebView when it scrolled.
   */
  private OnWebViewExScrolledListener mOnWebViewExScrolledListener;

  public WebViewEx(Context context) {
    super(context);
  }

  public WebViewEx(Context context, AttributeSet attrs) {
    super(context, attrs);
  }

  public WebViewEx(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
  }

  @Override
  protected void onScrollChanged(int l, int t, int oldl, int oldt) {
    if (t > 0) {
      if (mOnWebViewExScrolledListener != null) {
        mOnWebViewExScrolledListener.onScrollChanged(t > oldt);
      }
    } else {
      if (t == 0) {
        if (mOnWebViewExScrolledListener != null) {
          mOnWebViewExScrolledListener.onScrolledTop();
        }
      }
    }
    super.onScrollChanged(l, t, oldl, oldt);
  }

  /**
   * Set listener hooks the WebView when it scrolled.
   *
   * @param onWebViewExScrolledListener
   *     The instance of listener.
   */
  public void setOnWebViewExScrolledListener(OnWebViewExScrolledListener onWebViewExScrolledListener) {
    mOnWebViewExScrolledListener = onWebViewExScrolledListener;
  }



  /**
   * A listener hooks the WebView when it scrolled.
   *
   * @author Xinyue Zhao
   */
  public interface OnWebViewExScrolledListener {
    /**
     * Event fired when user scrolled the WebView.
     *
     * @param isUp
     *     True if user scrolled up, false then down.
     */
    void onScrollChanged(boolean isUp);
    /**
     * Event fired when user scrolled the WebView onto TOP.
     */
    void onScrolledTop();
  }
}

Java Source Code List