Android Open Source - pulltorefresh_library_with_Indexable_listView Indexable List View

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License

The source code is released under:

Apache License

Java Source Code

/*
 * Copyright 2011 woozzu//from  ww w  .j  a v a2s.  c o m
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.handmark.pulltorefresh.library.extras;

import android.content.Context;
import android.graphics.Canvas;
import android.util.AttributeSet;
import android.util.Log;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.widget.ListAdapter;
import android.widget.ListView;

import com.handmark.pulltorefresh.library.PullToRefreshBase;

public class IndexableListView extends ListView {
  
  private boolean mIsFastScrollEnabled = false;
  private IndexScroller mScroller = null;
  private GestureDetector mGestureDetector = null;

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

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

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

  @Override
  public boolean isFastScrollEnabled() {
    return mIsFastScrollEnabled;
  }

  @Override
  public void setFastScrollEnabled(boolean enabled) {
    mIsFastScrollEnabled = enabled;
    if (mIsFastScrollEnabled) {
      if (mScroller == null)
        mScroller = new IndexScroller(getContext(), this);
    } else {
      if (mScroller != null) {
        mScroller.hide();
        mScroller = null;
      }
    }
  }

  @Override
  public void draw(Canvas canvas) {
    super.draw(canvas);
    
    // Overlay index bar
    if (mScroller != null)
      mScroller.draw(canvas);
  }

  @Override
  public boolean onTouchEvent(MotionEvent ev) {
    // Intercept ListView's touch event
    if (mScroller != null && mScroller.onTouchEvent(ev))
      return true;
    
    if (mGestureDetector == null) {
      mGestureDetector = new GestureDetector(getContext(), new GestureDetector.SimpleOnGestureListener() {

        @Override
        public boolean onFling(MotionEvent e1, MotionEvent e2,
            float velocityX, float velocityY) {
          // If fling happens, index bar shows
          mScroller.show();
          return super.onFling(e1, e2, velocityX, velocityY);
        }
        
      });
    }
    mGestureDetector.onTouchEvent(ev);
    
    return super.onTouchEvent(ev);
  }

  @Override
  public boolean onInterceptTouchEvent(MotionEvent ev) {
    PullToRefreshBase.INDEXABLE_ISSHOW = mScroller.isShow(); 
    if (false == mScroller.isShow()) {
      return false;
    }
    return true;

  }

  @Override
  public void setAdapter(ListAdapter adapter) {
    super.setAdapter(adapter);
    if (mScroller != null)
      mScroller.setAdapter(adapter);
  }

  @Override
  protected void onSizeChanged(int w, int h, int oldw, int oldh) {
    super.onSizeChanged(w, h, oldw, oldh);
    if (mScroller != null)
      mScroller.onSizeChanged(w, h, oldw, oldh);
  }

}

Java Source Code List

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