我的布局中有一个 Gallery 以及一个 ImageView 和一些 TextView 小部件。不幸的是，我在慢速手机上的画廊滚动性能很低。当我从包含 ImageView 和 TextView 的 LinearLayout 中删除背景图像时，问题就消失了。我覆盖了整个视图的 onDraw() 并检查了剪辑矩形 - 它始终是整个屏幕。看起来每次我滚动图库（并且它已失效）时，整个屏幕都会失效。当我只滚动图库小部件时，有什么方法可以避免全屏重绘？
谢谢
private class GalleryAdapter extends ArrayAdapter<WeatherDisplayInfo> {
LayoutInflater mInflater;
Context mContext;
public GalleryAdapter(Context context) {
super(context, R.layout.gallery_item_view, mForecastData);
mContext = context;
mInflater = LayoutInflater.from(context);
}
public int getCount() {
return mForecastData.size();
}
public WeatherDisplayInfo getItem(int position) {
return mForecastData.get(position);
}
public long getItemId(int position) {
return position;
}
private class ViewHolder {
public TextView text_date;
public TextView text_forecast;
public TextView text_temperature;
public TextView text_pressure;
public TextView text_humidity;
public TextView text_windspeed;
public ImageView weather_image;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if(convertView == null) {
if(position == getCount() - 1) {
convertView = mInflater.inflate(R.layout.logo_view, null);
holder = new ViewHolder();
// store view holder
convertView.setTag(holder);
} else {
convertView = mInflater.inflate(R.layout.gallery_item_view, null);
holder = new ViewHolder();
holder.text_date = (TextView) convertView.findViewById(R.id.text_date);
holder.text_forecast = (TextView) convertView.findViewById(R.id.text_desc);
holder.text_temperature = (TextView) convertView.findViewById(R.id.text_temp);
holder.text_pressure = (TextView) convertView.findViewById(R.id.text_pressure);
holder.text_humidity = (TextView) convertView.findViewById(R.id.text_humidity);
holder.text_windspeed = (TextView) convertView.findViewById(R.id.text_wind);
holder.weather_image = (ImageView) convertView.findViewById(R.id.image_weather_view);;
// store view holder
convertView.setTag(holder);
convertView.setDrawingCacheEnabled(true);
convertView.buildDrawingCache();
}
} else {
holder = (ViewHolder) convertView.getTag();
}
// set view data
return convertView;
}