GridView太多了

Question

我的应用程序中有一个GridView，它从“drawables”文件夹加载图像，大约有17个图像（960x600），但问题是，我无法正常滚动，因为它滞后太多了！

package com.example.helloworld;

import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;

public class ImageAdapter extends BaseAdapter {
private Context mContext;

  // Constructor
public ImageAdapter(Context c) {
  mContext = c;
  }

public int getCount() {
  return mThumbIds.length;
 }

public Object getItem(int position) {
  return null;
 }

public long getItemId(int position) {
  return 0;
 }

  // create a new ImageView for each item referenced by the Adapter
 public View getView(int position, View convertView, ViewGroup parent) {
  ImageView imageView;
  if (convertView == null) {
  imageView = new ImageView(mContext);
  imageView.setLayoutParams(new GridView.LayoutParams(85, 85));
  imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
  imageView.setPadding(8, 8, 8, 8);
  } else {
  imageView = (ImageView) convertView;
  }

  imageView.setImageResource(mThumbIds[position]);
  return imageView;
   }

   // Keep all Images in array
  public Integer[] mThumbIds = {
  R.drawable.sample_0, 
  R.drawable.sample_1,
  R.drawable.sample_2, 
  R.drawable.sample_3,
  R.drawable.sample_4, 
  R.drawable.sample_5,
  R.drawable.sample_6, 
  R.drawable.sample_7,
  R.drawable.sample_8, 
  R.drawable.sample_9,
  R.drawable.sample_10, 
  R.drawable.sample_11,
  R.drawable.sample_12, 
  R.drawable.sample_13,
  R.drawable.sample_14, 
  R.drawable.sample_15,
  R.drawable.sample_16, 
  R.drawable.sample_17  

  };
   }