Android Open Source - PatternAndroid Pull To Refresh Grid View

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Java Source Code

/*******************************************************************************
 * Copyright 2011, 2012 Chris Banes.//  w  w  w  . j  a v  a  2s .co 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;

import android.annotation.TargetApi;
import android.content.Context;
import android.os.Build.VERSION;
import android.os.Build.VERSION_CODES;
import android.util.AttributeSet;
import android.view.View;
import android.widget.GridView;

import com.handmark.pulltorefresh.library.internal.EmptyViewMethodAccessor;

public class PullToRefreshGridView extends PullToRefreshAdapterViewBase<GridView> {

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

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

  public PullToRefreshGridView(Context context, Mode mode) {
    super(context, mode);
  }

  public PullToRefreshGridView(Context context, Mode mode, AnimationStyle style) {
    super(context, mode, style);
  }

  @Override
  public final Orientation getPullToRefreshScrollDirection() {
    return Orientation.VERTICAL;
  }

  @Override
  protected final GridView createRefreshableView(Context context, AttributeSet attrs) {
    final GridView gv;
    if (VERSION.SDK_INT >= VERSION_CODES.GINGERBREAD) {
      gv = new InternalGridViewSDK9(context, attrs);
    } else {
      gv = new InternalGridView(context, attrs);
    }

    // Use Generated ID (from res/values/ids.xml)
    gv.setId(R.id.gridview);
    return gv;
  }

  class InternalGridView extends GridView implements EmptyViewMethodAccessor {

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

    @Override
    public void setEmptyView(View emptyView) {
      PullToRefreshGridView.this.setEmptyView(emptyView);
    }

    @Override
    public void setEmptyViewInternal(View emptyView) {
      super.setEmptyView(emptyView);
    }
  }

  @TargetApi(9)
  final class InternalGridViewSDK9 extends InternalGridView {

    public InternalGridViewSDK9(Context context, AttributeSet attrs) {
      super(context, attrs);
    }

    @Override
    protected boolean overScrollBy(int deltaX, int deltaY, int scrollX, int scrollY, int scrollRangeX,
        int scrollRangeY, int maxOverScrollX, int maxOverScrollY, boolean isTouchEvent) {

      final boolean returnValue = super.overScrollBy(deltaX, deltaY, scrollX, scrollY, scrollRangeX,
          scrollRangeY, maxOverScrollX, maxOverScrollY, isTouchEvent);

      // Does all of the hard work...
      OverscrollHelper.overScrollBy(PullToRefreshGridView.this, deltaX, scrollX, deltaY, scrollY, isTouchEvent);

      return returnValue;
    }
  }
}

Java Source Code List